Composites Science and Technology最新文献_第3页

Scale matters: A perspective on structural hierarchical carbon fibre composites incorporating carbon nanotubes 规模问题：结构层次碳纤维复合材料结合碳纳米管的观点

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2026-04-12 Epub Date: 2026-01-13 DOI: 10.1016/j.compscitech.2026.111525

Neptun Yousefi , Han Tao , David B. Anthony , Milo S.P. Shaffer , Alexander Bismarck

Composites have long played a vital role in material science due to their lightweight, stiff, strong, and durable construction. Composites consist of at least two complementary materials, typically comprising reinforcing elements, prominently carbon or glass fibres, held in place by a surrounding polymer matrix. Conventional fibre composites already display a structural hierarchy from fibres within tows, to plies, to laminates forming large-scale structures. The term “hierarchical composites” specifically refers to materials that integrate reinforcements spanning additional length scales, down to the molecular range, most notably nanoscale reinforcements that complement microscale fibres. Natural structural materials rely extensively on hierarchical motifs to maximise performance, though using constituents limited by abundance and ambient aqueous processing. Technical hierarchical composites are broadly inspired by natural multiscale systems, sometimes implementing specific mechanisms from nature in new material classes. In hierarchical composites, the largest reinforcement, fibres, dominate in-plane mechanical properties. In contrast, nanoscale reinforcements may address matrix-dominated responses by, for example, improving shear properties that control stress transfer and kink band initiation, introducing additional toughening mechanisms to limit debonding or delamination, and providing direct reinforcement, particularly through-thickness. Nanomaterials can provide other benefits, such as improved fatigue life, acoustic damping, and solvent/fire resistance. The addition of nanomaterials may also imbue composites with multifunctionality, obviating other constituents or components and reducing system weight. We critically discuss the progress in developing hierarchical fibre reinforced carbon nanotube composites over the past decade and provide insight into manufacturing and their structural and functional performance.

复合材料由于其轻、硬、强、耐用的结构，长期以来在材料科学中起着至关重要的作用。复合材料由至少两种互补材料组成，通常包括增强元素，主要是碳或玻璃纤维，由周围的聚合物基质固定在适当的位置。传统的纤维复合材料已经显示出一种结构层次，从纤维束到层，再到层压板形成大规模结构。“层次化复合材料”一词特指那些集成了额外长度尺度（小至分子范围）的增强材料，最著名的是补充微尺度纤维的纳米级增强材料。天然结构材料广泛依赖于层次结构，以最大限度地提高性能，尽管使用的成分受到丰度和环境水处理的限制。技术层次复合材料广泛受到自然多尺度系统的启发，有时在新材料类别中实现来自自然的特定机制。在分层复合材料中，最大的增强材料，纤维，主导着平面内的力学性能。相比之下，纳米级增强材料可以通过改善控制应力传递和扭结带引发的剪切性能，引入额外的增韧机制来限制脱粘或分层，以及提供直接增强，特别是通过厚度增强，来解决基体主导的反应。纳米材料还可以提供其他好处，如提高疲劳寿命、声学阻尼和耐溶剂/防火性能。纳米材料的加入也可以使复合材料具有多功能性，避免了其他成分或组件并减轻了系统重量。我们批判性地讨论了在过去十年中发展分层纤维增强碳纳米管复合材料的进展，并提供了制造及其结构和功能性能的见解。

{"title":"Scale matters: A perspective on structural hierarchical carbon fibre composites incorporating carbon nanotubes","authors":"Neptun Yousefi , Han Tao , David B. Anthony , Milo S.P. Shaffer , Alexander Bismarck","doi":"10.1016/j.compscitech.2026.111525","DOIUrl":"10.1016/j.compscitech.2026.111525","url":null,"abstract":"<div><div>Composites have long played a vital role in material science due to their lightweight, stiff, strong, and durable construction. Composites consist of at least two complementary materials, typically comprising reinforcing elements, prominently carbon or glass fibres, held in place by a surrounding polymer matrix. Conventional fibre composites already display a structural hierarchy from fibres within tows, to plies, to laminates forming large-scale structures. The term “hierarchical composites” specifically refers to materials that integrate reinforcements spanning additional length scales, down to the molecular range, most notably nanoscale reinforcements that complement microscale fibres. Natural structural materials rely extensively on hierarchical motifs to maximise performance, though using constituents limited by abundance and ambient aqueous processing. Technical hierarchical composites are broadly inspired by natural multiscale systems, sometimes implementing specific mechanisms from nature in new material classes. In hierarchical composites, the largest reinforcement, fibres, dominate in-plane mechanical properties. In contrast, nanoscale reinforcements may address matrix-dominated responses by, for example, improving shear properties that control stress transfer and kink band initiation, introducing additional toughening mechanisms to limit debonding or delamination, and providing direct reinforcement, particularly through-thickness. Nanomaterials can provide other benefits, such as improved fatigue life, acoustic damping, and solvent/fire resistance. The addition of nanomaterials may also imbue composites with multifunctionality, obviating other constituents or components and reducing system weight. We critically discuss the progress in developing hierarchical fibre reinforced carbon nanotube composites over the past decade and provide insight into manufacturing and their structural and functional performance.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"277 ","pages":"Article 111525"},"PeriodicalIF":9.8,"publicationDate":"2026-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146036874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A detailed study of NiFe2O4-PVDF magnetic composites: Structural stability and superior magnetic properties for functional applications NiFe2O4-PVDF磁性复合材料的详细研究：结构稳定性和功能应用的优越磁性

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2026-03-22 Epub Date: 2026-01-06 DOI: 10.1016/j.compscitech.2026.111521

Sarah Baayyad , Chaymae Bahloul , Fatima-Zahra Semlali , El Kebir Hlil , Tarik Mahfoud , Hassan EL Moussaoui , Mounir EL Achaby

In this work, PVDF-based magnetic nanocomposites reinforced with NiFe₂O₄ nanoparticles were successfully fabricated through a two-step process, involving nanoparticle synthesis at controlled pH values (10, 11, and 12) followed by composite preparation via solvent casting. The influence of particle size, loading, and inter-particles interaction on the structural, mechanical, and magnetic properties of the magnetic polymer composite was systematically investigated. SEM analysis revealed that higher nanoparticle loadings and larger particle sizes increased surface roughness due to aggregation and chain disruption, yet the magnetic polymer composite material maintained structural integrity without phase separation or defects. Mechanical performance was also strongly governed by nanoparticle characteristics: PVDF/30-NF11 showed the highest stiffness, while PVDF/30-NF10, containing smaller particles (26.7 nm), achieved the best balance of stiffness, strength, and strain. Magnetic behavior was optimized in PVDF/30-NF11, where particle size (42 nm) enabled strong inter-particle interactions and enhanced structural stability, yielding superior magnetic response. These findings highlight how particle size, the filler content in the PVDF matrix, and the inter-particle interactions, collectively govern the overall performance of PVDF based magnetic composite, offering a clear pathway to guide the optimized design of high-performance polymer-based magnetic materials for applications in sensors, actuators, and electromagnetic devices.

在这项工作中，通过两步工艺成功制备了以NiFe2O4纳米颗粒增强的pvdf基磁性纳米复合材料，包括在控制pH值（10、11和12）下合成纳米颗粒，然后通过溶剂铸造制备复合材料。系统地研究了粒径、载荷和颗粒间相互作用对磁性聚合物复合材料结构、力学和磁性能的影响。SEM分析表明，高纳米颗粒负载和大颗粒尺寸增加了表面粗糙度，因为聚集和链断裂，但磁性聚合物复合材料保持结构完整性，没有相分离或缺陷。力学性能也受到纳米颗粒特性的强烈影响：PVDF/30-NF11具有最高的刚度，而PVDF/30-NF10含有较小的颗粒（26.7 nm），达到了刚度，强度和应变的最佳平衡。PVDF/30-NF11的磁性行为进行了优化，其中粒径（42 nm）使颗粒间相互作用强，增强了结构稳定性，产生了优异的磁性响应。这些发现强调了PVDF基质中的颗粒大小、填料含量以及颗粒间相互作用如何共同影响PVDF基磁性复合材料的整体性能，为指导高性能聚合物基磁性材料的优化设计提供了明确的途径，可用于传感器、执行器和电磁器件。

{"title":"A detailed study of NiFe2O4-PVDF magnetic composites: Structural stability and superior magnetic properties for functional applications","authors":"Sarah Baayyad , Chaymae Bahloul , Fatima-Zahra Semlali , El Kebir Hlil , Tarik Mahfoud , Hassan EL Moussaoui , Mounir EL Achaby","doi":"10.1016/j.compscitech.2026.111521","DOIUrl":"10.1016/j.compscitech.2026.111521","url":null,"abstract":"<div><div>In this work, PVDF-based magnetic nanocomposites reinforced with NiFe<sub>2</sub>O<sub>4</sub> nanoparticles were successfully fabricated through a two-step process, involving nanoparticle synthesis at controlled pH values (10, 11, and 12) followed by composite preparation via solvent casting. The influence of particle size, loading, and inter-particles interaction on the structural, mechanical, and magnetic properties of the magnetic polymer composite was systematically investigated. SEM analysis revealed that higher nanoparticle loadings and larger particle sizes increased surface roughness due to aggregation and chain disruption, yet the magnetic polymer composite material maintained structural integrity without phase separation or defects. Mechanical performance was also strongly governed by nanoparticle characteristics: PVDF/30-NF11 showed the highest stiffness, while PVDF/30-NF10, containing smaller particles (26.7 nm), achieved the best balance of stiffness, strength, and strain. Magnetic behavior was optimized in PVDF/30-NF11, where particle size (42 nm) enabled strong inter-particle interactions and enhanced structural stability, yielding superior magnetic response. These findings highlight how particle size, the filler content in the PVDF matrix, and the inter-particle interactions, collectively govern the overall performance of PVDF based magnetic composite, offering a clear pathway to guide the optimized design of high-performance polymer-based magnetic materials for applications in sensors, actuators, and electromagnetic devices.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"276 ","pages":"Article 111521"},"PeriodicalIF":9.8,"publicationDate":"2026-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145922840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Application of an unsupervised deep learning framework for acoustic emission-based characterization of delamination process in composite laminates 应用无监督深度学习框架对复合材料层合板的分层过程进行声发射表征

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2026-03-22 Epub Date: 2026-01-02 DOI: 10.1016/j.compscitech.2025.111507

Jakub Rzeczkowski

This study presents an advanced unsupervised deep learning framework for characterization of delamination processes in composite laminates based on acoustic emission (AE) measurements. The AE signal descriptors acquired during a double cantilever beam test were processed through a multi-stage analytical pipeline integrating stacked autoencoder for nonlinear feature extraction, uniform manifold approximation and projection (UMAP) for low-dimensional embedding and hierarchical density-based spatial clustering of applications with noise (HDBSCAN) for unsupervised acoustic emission signals classification. This comprehensive approach enabled effective segregation of heterogeneous AE events into distinct clusters associated with specific damage mechanisms occurring during delamination process. The clustering outcomes were further validated through complementary time-frequency analysis by using continuous wavelet transform (CWT). In addition, a scanning electron microscopy fractographic observations of real delamination surfaces were also conducted. The proposed framework facilitated the differentiation of AE signal groups that may be associated with typical damage mechanisms, including matrix cracking, interfacial debonding with fiber pull-out and delamination. By removing the reliance on manual feature engineering and labeled datasets, this methodology provides a fully data-driven tool for interpretation of complex acoustic emission data. Furthermore, a prototype software application was developed to enable real-time processing, clustering and visualization of AE signals during experimental testing. The originality of this work lies in the integration of deep representation learning, nonlinear manifold embedding and density-based clustering into a coherent unsupervised analytical framework enabling efficient clustering of nonlinear acoustic emission data acquired during experimental testing of composite laminates.

本研究提出了一种先进的无监督深度学习框架，用于表征基于声发射（AE）测量的复合材料层压板的分层过程。在双悬臂梁测试过程中获得的声发射信号描述符通过多层分析管道进行处理，该管道集成了堆叠自编码器进行非线性特征提取，均匀流形逼近和投影（UMAP）进行低维嵌入，基于分层密度的带噪声应用空间聚类（HDBSCAN）进行无监督声发射信号分类。这种综合的方法能够有效地将异质声发射事件分离成与分层过程中发生的特定损伤机制相关的不同簇。通过连续小波变换（CWT）的互补时频分析进一步验证聚类结果。此外，还对实际脱层表面进行了扫描电镜断口观察。所提出的框架有助于区分可能与典型损伤机制相关的声发射信号群，包括基体开裂、界面脱粘（纤维拔出）和分层。通过消除对手动特征工程和标记数据集的依赖，该方法为复杂声发射数据的解释提供了完全数据驱动的工具。此外，开发了一个原型软件应用程序，实现了实验测试过程中声发射信号的实时处理、聚类和可视化。这项工作的独创性在于将深度表示学习，非线性流形嵌入和基于密度的聚类集成到一个连贯的无监督分析框架中，从而能够有效地聚类复合材料层压板实验测试期间获得的非线性声发射数据。

{"title":"Application of an unsupervised deep learning framework for acoustic emission-based characterization of delamination process in composite laminates","authors":"Jakub Rzeczkowski","doi":"10.1016/j.compscitech.2025.111507","DOIUrl":"10.1016/j.compscitech.2025.111507","url":null,"abstract":"<div><div>This study presents an advanced unsupervised deep learning framework for characterization of delamination processes in composite laminates based on acoustic emission (AE) measurements. The AE signal descriptors acquired during a double cantilever beam test were processed through a multi-stage analytical pipeline integrating stacked autoencoder for nonlinear feature extraction, uniform manifold approximation and projection (UMAP) for low-dimensional embedding and hierarchical density-based spatial clustering of applications with noise (HDBSCAN) for unsupervised acoustic emission signals classification. This comprehensive approach enabled effective segregation of heterogeneous AE events into distinct clusters associated with specific damage mechanisms occurring during delamination process. The clustering outcomes were further validated through complementary time-frequency analysis by using continuous wavelet transform (CWT). In addition, a scanning electron microscopy fractographic observations of real delamination surfaces were also conducted. The proposed framework facilitated the differentiation of AE signal groups that may be associated with typical damage mechanisms, including matrix cracking, interfacial debonding with fiber pull-out and delamination. By removing the reliance on manual feature engineering and labeled datasets, this methodology provides a fully data-driven tool for interpretation of complex acoustic emission data. Furthermore, a prototype software application was developed to enable real-time processing, clustering and visualization of AE signals during experimental testing. The originality of this work lies in the integration of deep representation learning, nonlinear manifold embedding and density-based clustering into a coherent unsupervised analytical framework enabling efficient clustering of nonlinear acoustic emission data acquired during experimental testing of composite laminates.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"276 ","pages":"Article 111507"},"PeriodicalIF":9.8,"publicationDate":"2026-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145922835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi-scale interfacial engineering of hierarchical sandwich-structured conductive polymer composites for flexible electronics 柔性电子用分层三明治结构导电聚合物复合材料的多尺度界面工程

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2026-03-22 Epub Date: 2025-12-27 DOI: 10.1016/j.compscitech.2025.111499

Ling Wang , Yuntao Liu , Peizhao Luo , Zhefan Li , Hao Wang , Xuewu Huang , Jiefeng Gao

Electrospun conductive polymer nanofiber composites are promising for flexible electronics, yet their practical use is constrained by trade-offs among mechanical robustness, charge/heat transport, and environmental stability. Here, we present a multi-scale interfacial engineering strategy to construct a hierarchical sandwich-structured composite membrane through synergistic colloidal assembly and interfacial bonding. Polydopamine-assisted in situ silver metallization forms percolative conductive nano-domains along polyurethane (PU) nanofiber surfaces, while vacuum-filtrated multi-walled carbon nanotube (MWCNT) skins are conformally anchored via hot pressing, establishing covalent and non-covalent interfacial linkages. This architecture enables continuous, defect-minimized pathways for electron and phonon transport and simultaneously improves structural densification and interfacial adhesion. As a result, the membrane exhibits a rare combination of properties: high tensile strength (18.1 MPa) with large fracture strain (686.9 %), low sheet resistance (14.8 mΩ sq⁻¹), pronounced anisotropic thermal conductivity (7.93 W m⁻¹ K⁻¹), and stable electro-/photothermal performance. Additionally, it retains robust hydrophobicity (>132° water contact angle) and conductivity under repeated mechanical deformation. Demonstrations as thermal interface materials and wearable strain sensors exhibit its broad multifunctionality. This work establishes a generalizable interfacial design strategy that reconciles traditionally competing properties in conductive polymer composites, advancing their integration into flexible electronic systems.

电纺丝导电聚合物纳米纤维复合材料在柔性电子领域前景广阔，但其实际应用受到机械稳健性、电荷/热输运和环境稳定性之间权衡的限制。在这里，我们提出了一种多尺度界面工程策略，通过协同胶体组装和界面键合来构建层次化的三明治结构复合膜。聚多巴胺辅助的原位银金属化沿着聚氨酯（PU）纳米纤维表面形成渗透导电纳米畴，而真空过滤的多壁碳纳米管（MWCNT）表面通过热压固定，建立共价和非共价界面键。这种结构可以实现电子和声子传输的连续、缺陷最小化的途径，同时提高结构致密化和界面粘附性。因此，该薄膜表现出罕见的综合性能：高拉伸强度（18.1 MPa），大断裂应变（686.9%），低片材电阻（14.8 mΩ sq−1），显著的各向异性导热系数（7.93 W m−1 K−1），以及稳定的电/光热性能。此外，在重复机械变形下，它仍保持强大的疏水性（>；132°水接触角）和导电性。热界面材料和可穿戴应变传感器展示了其广泛的多功能性。这项工作建立了一种通用的界面设计策略，该策略调和了导电聚合物复合材料中传统的竞争特性，促进了它们与柔性电子系统的集成。

{"title":"Multi-scale interfacial engineering of hierarchical sandwich-structured conductive polymer composites for flexible electronics","authors":"Ling Wang , Yuntao Liu , Peizhao Luo , Zhefan Li , Hao Wang , Xuewu Huang , Jiefeng Gao","doi":"10.1016/j.compscitech.2025.111499","DOIUrl":"10.1016/j.compscitech.2025.111499","url":null,"abstract":"<div><div>Electrospun conductive polymer nanofiber composites are promising for flexible electronics, yet their practical use is constrained by trade-offs among mechanical robustness, charge/heat transport, and environmental stability. Here, we present a multi-scale interfacial engineering strategy to construct a hierarchical sandwich-structured composite membrane through synergistic colloidal assembly and interfacial bonding. Polydopamine-assisted in situ silver metallization forms percolative conductive nano-domains along polyurethane (PU) nanofiber surfaces, while vacuum-filtrated multi-walled carbon nanotube (MWCNT) skins are conformally anchored via hot pressing, establishing covalent and non-covalent interfacial linkages. This architecture enables continuous, defect-minimized pathways for electron and phonon transport and simultaneously improves structural densification and interfacial adhesion. As a result, the membrane exhibits a rare combination of properties: high tensile strength (18.1 MPa) with large fracture strain (686.9 %), low sheet resistance (14.8 mΩ sq<sup>−1</sup>), pronounced anisotropic thermal conductivity (7.93 W m<sup>−1</sup> K<sup>−1</sup>), and stable electro-/photothermal performance. Additionally, it retains robust hydrophobicity (>132° water contact angle) and conductivity under repeated mechanical deformation. Demonstrations as thermal interface materials and wearable strain sensors exhibit its broad multifunctionality. This work establishes a generalizable interfacial design strategy that reconciles traditionally competing properties in conductive polymer composites, advancing their integration into flexible electronic systems.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"276 ","pages":"Article 111499"},"PeriodicalIF":9.8,"publicationDate":"2026-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145882966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Series-structured design for enhanced pyroresistive properties in low switching temperature PTC composites 低开关温度PTC复合材料中增强热阻性能的系列结构设计

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2026-03-22 Epub Date: 2026-01-02 DOI: 10.1016/j.compscitech.2026.111516

Teng Li , Chang Dong , Li Yang , Hui-Kang Xu , Gui-Lin Song , Jie Li , Yue-Yi Wang , Ding-Xiang Yan , Zhong-Ming Li

Positive temperature coefficient (PTC) composites with low switching temperature (T_s) are critical for self-regulating heating in spacecraft optical systems and energy systems, nevertheless, balancing low initial resistivity, high PTC intensity, and fast heating rate is still challenged. This work designs a novel low T_s PTC composite with series structure to conquer such contradictions, comprising a PTC switching module as interlayer and highly conductive heating modules as upper/lower layers. The architecture simultaneously leverages the sharp PTC effect of interlayers and rapid heating effect of upper/lower layers, resulting in obvious advantages in pyroresistivity properties and self-regulating heating performance. The series-structured composite achieves improved PTC intensity of 6.7 with the corresponding heater average heating rate of 25.8 °C/min, in comparison to 6.2 and 7.8 °C/min for the conventional PTC composite, while these two composites possess similar low T_s (38 °C) and initial resistivity (45 Ω cm). The series-structured composite also demonstrates exceptional reproducibility of pyroresistivity properties with 89 % resistivity retention over 500 heating-cooling cycles. Furthermore, as an innovative design architecture transcending compositional constraints, adjusting module compositions enables flexible tuning of pyroresistivity properties of the series-structured composites and average heating rates and equilibrium temperatures of the corresponding heater without compromising stability. This work provides a new guideline for developing low T_s PTC composites with potential applications in customizable aerospace de-icing, automotive heaters, and battery thermal management systems.

低开关温度的正温度系数（PTC）复合材料是航天器光学系统和能源系统自调节加热的关键，但如何平衡低初始电阻率、高开关温度强度和快速加热速率仍然是一个挑战。为了克服这一矛盾，本文设计了一种新颖的串联结构的低Ts PTC复合材料，其中PTC开关模块为中间层，高导电加热模块为上下两层。该结构同时利用了中间层的明显PTC效应和上下层的快速加热效应，在热阻性能和自调节加热性能上具有明显的优势。串联结构复合材料的PTC强度达到6.7，加热器的平均加热速率为25.8°C/min，而传统PTC复合材料的平均加热速率为6.2和7.8°C/min，两种复合材料具有相似的低Ts（38°C）和初始电阻率（45 Ω cm）。该系列结构的复合材料还表现出优异的热阻特性再现性，在500次加热-冷却循环中电阻率保持率为89%。此外，作为一种超越成分限制的创新设计架构，调整模块成分可以在不影响稳定性的情况下灵活调整串联结构复合材料的热阻特性以及相应加热器的平均加热速率和平衡温度。这项工作为开发低Ts PTC复合材料提供了新的指导方针，该复合材料在可定制的航空航天除冰、汽车加热器和电池热管理系统中具有潜在的应用前景。

{"title":"Series-structured design for enhanced pyroresistive properties in low switching temperature PTC composites","authors":"Teng Li , Chang Dong , Li Yang , Hui-Kang Xu , Gui-Lin Song , Jie Li , Yue-Yi Wang , Ding-Xiang Yan , Zhong-Ming Li","doi":"10.1016/j.compscitech.2026.111516","DOIUrl":"10.1016/j.compscitech.2026.111516","url":null,"abstract":"<div><div>Positive temperature coefficient (PTC) composites with low switching temperature (T<sub>s</sub>) are critical for self-regulating heating in spacecraft optical systems and energy systems, nevertheless, balancing low initial resistivity, high PTC intensity, and fast heating rate is still challenged. This work designs a novel low T<sub>s</sub> PTC composite with series structure to conquer such contradictions, comprising a PTC switching module as interlayer and highly conductive heating modules as upper/lower layers. The architecture simultaneously leverages the sharp PTC effect of interlayers and rapid heating effect of upper/lower layers, resulting in obvious advantages in pyroresistivity properties and self-regulating heating performance. The series-structured composite achieves improved PTC intensity of 6.7 with the corresponding heater average heating rate of 25.8 °C/min, in comparison to 6.2 and 7.8 °C/min for the conventional PTC composite, while these two composites possess similar low T<sub>s</sub> (38 °C) and initial resistivity (45 Ω cm). The series-structured composite also demonstrates exceptional reproducibility of pyroresistivity properties with 89 % resistivity retention over 500 heating-cooling cycles. Furthermore, as an innovative design architecture transcending compositional constraints, adjusting module compositions enables flexible tuning of pyroresistivity properties of the series-structured composites and average heating rates and equilibrium temperatures of the corresponding heater without compromising stability. This work provides a new guideline for developing low T<sub>s</sub> PTC composites with potential applications in customizable aerospace de-icing, automotive heaters, and battery thermal management systems.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"276 ","pages":"Article 111516"},"PeriodicalIF":9.8,"publicationDate":"2026-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145922832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sequential bridging and horizontal alignment: A synergistic engineering strategy for high-performance Graphene/CNF films 顺序桥接和水平对齐：高性能石墨烯/CNF薄膜的协同工程策略

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2026-03-22 Epub Date: 2026-01-05 DOI: 10.1016/j.compscitech.2026.111520

Yang Su, Jun Jin, Jiachen Guo, Minghui Zhang, Bo Peng, Min Chen, Limin Wu

Graphene-based composites are promising thermal management materials (TMMs) for integrated miniaturized electronics, yet surface size effects limit interfacial interactions and graphene alignment, hindering high thermal conductivity and mechanical strength. Herein, we fabricated robust graphene-based composite films via a sequential π-π, covalent, and hydrogen bonding integration, combining vacuum filtration and hot-pressing technologies. The self-assembled graphene and boron-doped graphene quantum dots (G/BGQDs), formed via intrinsic lattice matching, served as the filler within a cellulose nanofibers (CNF) matrix. At 80 wt% filler loading, the film exhibits an in-plane thermal conductivity of 136.7 W m⁻¹ K⁻¹, tensile strength of 95.1 MPa, and electromagnetic interference (EMI) shielding performance of 29.8 dB, along with excellent flexibility. The composite film demonstrates superior cooling efficiency for electronic components and stable thermal performance under various harsh conditions. This work provides a simple, scalable strategy for engineering interfacial interactions and lays a material foundation for high-performance thermal management systems.

石墨烯基复合材料是一种很有前途的集成小型化电子热管理材料（TMMs），但表面尺寸效应限制了界面相互作用和石墨烯排列，阻碍了高导热性和机械强度。在此，我们通过顺序π-π、共价和氢键集成，结合真空过滤和热压技术，制备了坚固的石墨烯基复合薄膜。自组装石墨烯和掺硼石墨烯量子点（G/BGQDs）通过本征晶格匹配形成，作为纤维素纳米纤维（CNF）基体的填料。在填充量为80 wt%时，薄膜的面内导热系数为136.7 W m−1 K−1，抗拉强度为95.1 MPa，电磁干扰（EMI）屏蔽性能为29.8 dB，同时具有优异的柔韧性。复合薄膜对电子元件具有优越的冷却效率，在各种恶劣条件下具有稳定的热性能。这项工作为工程界面交互提供了一种简单、可扩展的策略，并为高性能热管理系统奠定了物质基础。

{"title":"Sequential bridging and horizontal alignment: A synergistic engineering strategy for high-performance Graphene/CNF films","authors":"Yang Su, Jun Jin, Jiachen Guo, Minghui Zhang, Bo Peng, Min Chen, Limin Wu","doi":"10.1016/j.compscitech.2026.111520","DOIUrl":"10.1016/j.compscitech.2026.111520","url":null,"abstract":"<div><div>Graphene-based composites are promising thermal management materials (TMMs) for integrated miniaturized electronics, yet surface size effects limit interfacial interactions and graphene alignment, hindering high thermal conductivity and mechanical strength. Herein, we fabricated robust graphene-based composite films via a sequential π-π, covalent, and hydrogen bonding integration, combining vacuum filtration and hot-pressing technologies. The self-assembled graphene and boron-doped graphene quantum dots (G/BGQDs), formed via intrinsic lattice matching, served as the filler within a cellulose nanofibers (CNF) matrix. At 80 wt% filler loading, the film exhibits an in-plane thermal conductivity of 136.7 W m<sup>−1</sup> K<sup>−1</sup>, tensile strength of 95.1 MPa, and electromagnetic interference (EMI) shielding performance of 29.8 dB, along with excellent flexibility. The composite film demonstrates superior cooling efficiency for electronic components and stable thermal performance under various harsh conditions. This work provides a simple, scalable strategy for engineering interfacial interactions and lays a material foundation for high-performance thermal management systems.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"276 ","pages":"Article 111520"},"PeriodicalIF":9.8,"publicationDate":"2026-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145922837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Geometric scaling of reinforcement and its pivotal role in design of 3D woven composites 钢筋几何缩放及其在三维编织复合材料设计中的关键作用

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2026-03-22 Epub Date: 2026-01-07 DOI: 10.1016/j.compscitech.2026.111517

Elena Sitnikova , Shuguang Li

Geometric scaling has been defined as means of producing equivalent 3D layer-to-layer angle interlock woven composite configurations that have different reinforcement geometries but identical, or very similar, effective elastic properties. Scaling rules have been derived under condition that the key geometric properties of the weave: the interlocking angle, global fibre volume fraction and weft to warp tow volume ratio, should not be affected by scaling. The role of tow sizes as designable parameters directly associated with scaling has been established for the first time. With scaling method in place, design of 3D woven composites can be defined as a two-stage process, where the effective elastic properties are varied via systematic variation of tow densities, while scaling is applied at a post-processing stage to ensure the practicality of design. The design process is comprehensive in a sense that it involves all the designable parameters, explicitly defining their roles and contribution.

几何缩放被定义为产生等效的三维层对层角度互锁编织复合材料构型的手段，这些复合材料具有不同的增强几何形状，但具有相同或非常相似的有效弹性性能。在织物的关键几何性能：互锁角、总纤维体积分数和经纬拖曳比不受结垢影响的条件下，推导出结垢规则。作为可设计参数的拖曳尺寸的作用首次被确定，并与尺度直接相关。有了缩放法，三维编织复合材料的设计可以定义为两个阶段的过程，其中有效弹性性能是通过系统的变化束密度来改变的，而缩放是在后处理阶段进行的，以确保设计的实用性。从某种意义上说，设计过程是全面的，它涉及所有可设计的参数，明确定义它们的角色和贡献。

引用次数: 0

Enhancing polymer composite performance through optimized alignment with machine learning and in-situ monitoring in electrically assisted vat photopolymerization 提高聚合物复合材料的性能，通过优化对准与机器学习和现场监测的电辅助缸光聚合

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2026-03-22 Epub Date: 2026-01-01 DOI: 10.1016/j.compscitech.2025.111506

Tengteng Tang , Namratha Gopalabhatla , Jhati Seelapureddy , Jessica Westerham , Srikar Anudeep Remani , Shah Md Ashiquzzaman Nipu , Minju Yoo , Shenghan Guo , Xiangjia Li

Electrically assisted vat photopolymerization (E-VPP) presents a transformative approach for fabricating bioinspired, multiscale polymer composites with programmable anisotropic properties. By integrating dynamic electric field modulation with high-resolution video projection, E-VPP enables high-speed, cost-effective additive manufacturing of photocurable liquid crystal–silicon carbide (LC/SiC) nanocomposites. Precise nanofiller alignment achieved during printing is critical for tailoring microarchitectures and enhancing mechanical performance in a directionally controlled manner. A key challenge in this process is the real-time monitoring of nanofiller alignment, due to limited visual access during fabrication. To address this, we develop a generalizable machine learning prediction model that not only enables in-situ monitoring through video analysis but also accurately forecasts optimal alignment states across varying electric field conditions. Video data acquired during printing are analyzed using convolutional neural networks (CNNs) for feature extraction and principal component analysis (PCA) for dimensionality reduction. Anomaly detection techniques, such as Hotelling's T-squared analysis, are employed to identify time windows of stable alignment. These data-driven insights guide optimal voltage application and process timing, ensuring consistent material quality and reproducible anisotropy. Aligned nanofillers substantially enhance anisotropic structural deformation and enable shape-morphing functionality. Specifically, the alignment of liquid crystal elastomer precursors results in programmable deformation in response to drying stimuli. The method accommodates complex geometries and heterogeneous material compositions, broadening its applicability to soft robotics, adaptive optics, biomedical scaffolds, and flexible electronics. This work establishes E-VPP as a scalable, intelligent manufacturing platform for engineering high-performance, multifunctional polymer composites with spatially programmable anisotropy.

电辅助还原光聚合（E-VPP）为制造具有可编程各向异性特性的生物启发、多尺度聚合物复合材料提供了一种革命性的方法。通过将动态电场调制与高分辨率视频投影相结合，E-VPP实现了光固化液晶碳化硅（LC/SiC）纳米复合材料的高速、经济高效的增材制造。在打印过程中实现精确的纳米填料对齐对于定制微结构和以定向控制的方式提高机械性能至关重要。在这个过程中一个关键的挑战是实时监测纳米填料排列，由于有限的视觉访问在制造过程中。为了解决这个问题，我们开发了一种通用的机器学习预测模型，该模型不仅可以通过视频分析进行现场监测，还可以准确预测不同电场条件下的最佳对准状态。采用卷积神经网络（cnn）进行特征提取，主成分分析（PCA）进行降维，对打印过程中采集的视频数据进行分析。异常检测技术，如霍特林的t平方分析，被用来识别稳定对准的时间窗。这些数据驱动的见解指导最佳电压应用和工艺时机，确保一致的材料质量和可重复的各向异性。排列的纳米填料大大增强了各向异性结构变形和实现形状变形功能。具体来说，液晶弹性体前体的排列导致可编程变形，以响应干燥刺激。该方法适用于复杂的几何形状和异质材料组成，扩大了其在软机器人、自适应光学、生物医学支架和柔性电子领域的适用性。这项工作建立了E-VPP作为一个可扩展的智能制造平台，用于工程高性能、多功能、具有空间可编程各向异性的聚合物复合材料。

{"title":"Enhancing polymer composite performance through optimized alignment with machine learning and in-situ monitoring in electrically assisted vat photopolymerization","authors":"Tengteng Tang , Namratha Gopalabhatla , Jhati Seelapureddy , Jessica Westerham , Srikar Anudeep Remani , Shah Md Ashiquzzaman Nipu , Minju Yoo , Shenghan Guo , Xiangjia Li","doi":"10.1016/j.compscitech.2025.111506","DOIUrl":"10.1016/j.compscitech.2025.111506","url":null,"abstract":"<div><div>Electrically assisted vat photopolymerization (E-VPP) presents a transformative approach for fabricating bioinspired, multiscale polymer composites with programmable anisotropic properties. By integrating dynamic electric field modulation with high-resolution video projection, E-VPP enables high-speed, cost-effective additive manufacturing of photocurable liquid crystal–silicon carbide (LC/SiC) nanocomposites. Precise nanofiller alignment achieved during printing is critical for tailoring microarchitectures and enhancing mechanical performance in a directionally controlled manner. A key challenge in this process is the real-time monitoring of nanofiller alignment, due to limited visual access during fabrication. To address this, we develop a generalizable machine learning prediction model that not only enables in-situ monitoring through video analysis but also accurately forecasts optimal alignment states across varying electric field conditions. Video data acquired during printing are analyzed using convolutional neural networks (CNNs) for feature extraction and principal component analysis (PCA) for dimensionality reduction. Anomaly detection techniques, such as Hotelling's T-squared analysis, are employed to identify time windows of stable alignment. These data-driven insights guide optimal voltage application and process timing, ensuring consistent material quality and reproducible anisotropy. Aligned nanofillers substantially enhance anisotropic structural deformation and enable shape-morphing functionality. Specifically, the alignment of liquid crystal elastomer precursors results in programmable deformation in response to drying stimuli. The method accommodates complex geometries and heterogeneous material compositions, broadening its applicability to soft robotics, adaptive optics, biomedical scaffolds, and flexible electronics. This work establishes E-VPP as a scalable, intelligent manufacturing platform for engineering high-performance, multifunctional polymer composites with spatially programmable anisotropy.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"276 ","pages":"Article 111506"},"PeriodicalIF":9.8,"publicationDate":"2026-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145922836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Revealing bird-strike damage mechanisms for CFRP laminates through a novel sub-element level experiment and simulation 通过新颖的亚单元级实验和模拟揭示CFRP层合板的鸟击损伤机理

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2026-03-22 Epub Date: 2025-12-27 DOI: 10.1016/j.compscitech.2025.111498

Qianchen Gao , Yang Bai , Xiaowei Jiang , Xiaopeng Chen , Wulin Si , You Li , Zhenqiang Zhao , Chao Zhang

Slicing-loading impacts on fan blades, which often occur when birds are ingested into aircraft engines, have been extensively investigated because of their complex loading characteristics. The development of a sub-element level test method is critically needed to simplify the study of impact resistance in fan blades in response to bird strikes and to comprehensively understand the associated damage behavior in composite materials. In this study, a sub-element level test method is proposed to replicate the slicing-loading and surface-traveling impact characteristics of bird strikes, and the impact behavior of carbon fiber–reinforced polymer (CFRP) laminates across a range of velocities is systematically investigated using experimental and numerical approaches. The developed numerical model was validated to ensure that it accurately predicts and captures multiple deformation and damage modes during the impact event.

The results reveal three distinct deformation modes of the laminate under bird strike, which lead to different damage modes. The deformation modes of the dominant damage behavior undergo a transition from single to combined effect with the increasing velocity. Analysis of the energy dissipation indicates a shift from predominantly intralaminar damage to a combination of intralaminar and interlaminar damage as the impact velocity increases. Two velocity thresholds were identified based on the correlation between delamination area and impact velocity, and these thresholds provide dual benchmarks for comprehensively evaluating the impact resistance of CFRP laminates. The findings of this study are expected to aid in the design of composite laminates for improved resistance to bird-strike impacts in aircraft applications.

由于其复杂的载荷特性，对风扇叶片的切片加载影响已经进行了广泛的研究，这种影响经常发生在鸟类进入飞机发动机时。为了简化风扇叶片在鸟击下的抗冲击性研究，并全面了解复合材料的相关损伤行为，迫切需要开发一种亚单元水平的试验方法。在这项研究中，提出了一种亚单元水平的测试方法来复制鸟击的切片加载和表面移动冲击特性，并采用实验和数值方法系统地研究了碳纤维增强聚合物（CFRP）层合板在一定速度范围内的冲击行为。对所建立的数值模型进行了验证，以确保它能够准确地预测和捕获碰撞事件中的多种变形和损伤模式。结果表明，在鸟击作用下，层压板具有三种不同的变形模式，从而导致不同的损伤模式。随着速度的增加，主导损伤行为的变形模式由单一作用向复合作用转变。能量耗散分析表明，随着冲击速度的增加，能量耗散从主要的层内损伤转变为层内和层间损伤的结合。基于分层面积与冲击速度的相关性，确定了两个速度阈值，为综合评价CFRP复合材料的抗冲击性能提供了双重基准。这项研究的结果有望帮助设计复合层压板，以提高飞机应用中对鸟击冲击的抵抗力。

{"title":"Revealing bird-strike damage mechanisms for CFRP laminates through a novel sub-element level experiment and simulation","authors":"Qianchen Gao , Yang Bai , Xiaowei Jiang , Xiaopeng Chen , Wulin Si , You Li , Zhenqiang Zhao , Chao Zhang","doi":"10.1016/j.compscitech.2025.111498","DOIUrl":"10.1016/j.compscitech.2025.111498","url":null,"abstract":"<div><div>Slicing-loading impacts on fan blades, which often occur when birds are ingested into aircraft engines, have been extensively investigated because of their complex loading characteristics. The development of a sub-element level test method is critically needed to simplify the study of impact resistance in fan blades in response to bird strikes and to comprehensively understand the associated damage behavior in composite materials. In this study, a sub-element level test method is proposed to replicate the slicing-loading and surface-traveling impact characteristics of bird strikes, and the impact behavior of carbon fiber–reinforced polymer (CFRP) laminates across a range of velocities is systematically investigated using experimental and numerical approaches. The developed numerical model was validated to ensure that it accurately predicts and captures multiple deformation and damage modes during the impact event.</div><div>The results reveal three distinct deformation modes of the laminate under bird strike, which lead to different damage modes. The deformation modes of the dominant damage behavior undergo a transition from single to combined effect with the increasing velocity. Analysis of the energy dissipation indicates a shift from predominantly intralaminar damage to a combination of intralaminar and interlaminar damage as the impact velocity increases. Two velocity thresholds were identified based on the correlation between delamination area and impact velocity, and these thresholds provide dual benchmarks for comprehensively evaluating the impact resistance of CFRP laminates. The findings of this study are expected to aid in the design of composite laminates for improved resistance to bird-strike impacts in aircraft applications.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"276 ","pages":"Article 111498"},"PeriodicalIF":9.8,"publicationDate":"2026-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145873888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Strategic structural design of polyimide dielectrics toward superior high-temperature energy storage performance 聚酰亚胺电介质的战略性结构设计，以获得优异的高温储能性能

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2026-03-22 Epub Date: 2026-01-01 DOI: 10.1016/j.compscitech.2025.111514

Jing Ye , Ao Xu , Zhijia Wang , Hang Luo , Xiwen Yang , Sheng Chen

All-aromatic polyimide dielectric films will seriously lose their energy storage performance at high temperatures because of high conductive loss caused by the conjugation effect of benzene rings in the backbone and charge transfer effect, especially commercial Kapton film. In order to maintain the low leakage current and energy storage stability of polyimide under high temperature and electric field, a synergistic strategy is employed to synthesize Kapton-based cross-linked dielectric films, involving polyhedral oligomeric silsesquioxane (POSS) cross-linked structure and a partial aliphatic structure. The results show that the energy storage performance of cross-linked ternary polyimides is significantly enhanced at room temperature and high temperature due to the construction of a “peak-shaped barrier” that effectively suppresses charge injection and transport. The discharge energy densities at room temperature and 150 °C are 8.01 J/cm³ and 5.04 J/cm³, respectively, which are much higher than those of pure Kapton. This study provides a valuable strategy and insights for the development of polyimide dielectrics with high capacitive properties over a wide temperature range.

全芳香族聚酰亚胺介电膜在高温下由于苯环的共轭效应和电荷转移效应造成的高导电性损失会严重丧失其储能性能，尤其是商用Kapton膜。为了保持聚酰亚胺在高温和电场下的低漏电流和储能稳定性，采用协同策略合成了kapton基交联介质薄膜，包括多面体低聚硅氧烷（POSS）交联结构和部分脂肪族结构。结果表明，交联三元聚酰亚胺在室温和高温下的储能性能都得到了显著提高，这是由于构建了一个“峰状势垒”，有效地抑制了电荷注入和输运。室温和150℃下的放电能量密度分别为8.01 J/cm3和5.04 J/cm3，远高于纯卡普顿的放电能量密度。该研究为开发具有宽温度范围内高电容性能的聚酰亚胺介电材料提供了有价值的策略和见解。

{"title":"Strategic structural design of polyimide dielectrics toward superior high-temperature energy storage performance","authors":"Jing Ye , Ao Xu , Zhijia Wang , Hang Luo , Xiwen Yang , Sheng Chen","doi":"10.1016/j.compscitech.2025.111514","DOIUrl":"10.1016/j.compscitech.2025.111514","url":null,"abstract":"<div><div>All-aromatic polyimide dielectric films will seriously lose their energy storage performance at high temperatures because of high conductive loss caused by the conjugation effect of benzene rings in the backbone and charge transfer effect, especially commercial Kapton film. In order to maintain the low leakage current and energy storage stability of polyimide under high temperature and electric field, a synergistic strategy is employed to synthesize Kapton-based cross-linked dielectric films, involving polyhedral oligomeric silsesquioxane (POSS) cross-linked structure and a partial aliphatic structure. The results show that the energy storage performance of cross-linked ternary polyimides is significantly enhanced at room temperature and high temperature due to the construction of a “peak-shaped barrier” that effectively suppresses charge injection and transport. The discharge energy densities at room temperature and 150 °C are 8.01 J/cm<sup>3</sup> and 5.04 J/cm<sup>3</sup>, respectively, which are much higher than those of pure Kapton. This study provides a valuable strategy and insights for the development of polyimide dielectrics with high capacitive properties over a wide temperature range.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"276 ","pages":"Article 111514"},"PeriodicalIF":9.8,"publicationDate":"2026-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145922833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0