Composites Science and Technology最新文献_第7页

Stabilizing free radical crosslinked dielectric polymers with metal-organic frameworks: An efficient approach to mitigating dielectric deterioration 用金属有机骨架稳定自由基交联介电聚合物：一种减轻介电劣化的有效方法

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-02-19 DOI: 10.1016/j.compscitech.2025.111109

Zeru Wang , Xie Wang , Hanxue Ren , Xiaotao Zhu , Zeming Fang , Qianfa Liu , Ke Wang

The rise of 5G and 6G technologies has heightened the demand for ultra-low dielectric loss thermosetting composites in advanced electronics. A significant challenge is dielectric degradation at elevated temperatures, primarily due to increased molecular polarizability from thermal aging. Traditional stabilization strategies are ineffective because of their incompatibility with free radical cross-linking reactions and their negative impact on dielectric performance. This study incorporates UiO-66, a metal-organic framework, into thermosetting polyphenylene oxide/1,2-polybutadiene systems, yielding composites with enhanced oxidation resistance and dielectric stability without impeding cross-linking. After 14 days of aging at 150 °C, the UiO-66-modified composite exhibited exceptional dielectric stability, with its dielectric loss increasing to only one-sixth compared to the unmodified system. Fourier-transform infrared and X-ray photoelectron spectroscopy analyses indicate that UiO-66 mitigates the oxidation of unreacted double bonds and delays the formation of C–O and CO groups. These improvements are attributed to UiO-66's exceptional oxygen/ozone adsorption capabilities, along with its free radical quenching abilities, facilitated by its high surface area, porous structure, and abundant open metal sites, confirmed by electron paramagnetic resonance and density functional theory analyses. Furthermore, UiO-66 reduces thermal expansion and increases modulus. This study opens a new avenue for designing and developing high-performance electronic materials with customizable structures and properties.

5G和6G技术的兴起提高了先进电子产品对超低介电损耗热固性复合材料的需求。一个重要的挑战是电介质在高温下的降解，主要是由于热老化导致分子极化率增加。传统的稳定策略由于与自由基交联反应不相容以及对介电性能的负面影响而无效。本研究将UiO-66（一种金属有机骨架）加入到热固性聚苯氧化物/1,2-聚丁二烯体系中，得到的复合材料具有增强的抗氧化性和介电稳定性，且不妨碍交联。在150°C下老化14天后，uio -66改性复合材料表现出优异的介电稳定性，其介电损耗仅增加到未改性体系的六分之一。傅里叶变换红外和x射线光电子能谱分析表明，UiO-66减轻了未反应双键的氧化，延缓了C-O和CO基团的形成。这些改进归功于UiO-66卓越的氧/臭氧吸附能力，以及自由基猝灭能力，这得益于其高表面积、多孔结构和丰富的开放金属位点，这些都得到了电子顺磁共振和密度泛函理论分析的证实。此外，UiO-66降低了热膨胀，增加了模量。这项研究为设计和开发具有可定制结构和性能的高性能电子材料开辟了新的途径。

{"title":"Stabilizing free radical crosslinked dielectric polymers with metal-organic frameworks: An efficient approach to mitigating dielectric deterioration","authors":"Zeru Wang , Xie Wang , Hanxue Ren , Xiaotao Zhu , Zeming Fang , Qianfa Liu , Ke Wang","doi":"10.1016/j.compscitech.2025.111109","DOIUrl":"10.1016/j.compscitech.2025.111109","url":null,"abstract":"<div><div>The rise of 5G and 6G technologies has heightened the demand for ultra-low dielectric loss thermosetting composites in advanced electronics. A significant challenge is dielectric degradation at elevated temperatures, primarily due to increased molecular polarizability from thermal aging. Traditional stabilization strategies are ineffective because of their incompatibility with free radical cross-linking reactions and their negative impact on dielectric performance. This study incorporates UiO-66, a metal-organic framework, into thermosetting polyphenylene oxide/1,2-polybutadiene systems, yielding composites with enhanced oxidation resistance and dielectric stability without impeding cross-linking. After 14 days of aging at 150 °C, the UiO-66-modified composite exhibited exceptional dielectric stability, with its dielectric loss increasing to only one-sixth compared to the unmodified system. Fourier-transform infrared and X-ray photoelectron spectroscopy analyses indicate that UiO-66 mitigates the oxidation of unreacted double bonds and delays the formation of C–O and C<img>O groups. These improvements are attributed to UiO-66's exceptional oxygen/ozone adsorption capabilities, along with its free radical quenching abilities, facilitated by its high surface area, porous structure, and abundant open metal sites, confirmed by electron paramagnetic resonance and density functional theory analyses. Furthermore, UiO-66 reduces thermal expansion and increases modulus. This study opens a new avenue for designing and developing high-performance electronic materials with customizable structures and properties.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"264 ","pages":"Article 111109"},"PeriodicalIF":8.3,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143453267","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

Broadband strong absorption in lightweight metastructure via multiscale modulation 基于多尺度调制的轻量化元结构宽带强吸收

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-02-19 DOI: 10.1016/j.compscitech.2025.111110

Kai Cui, Lei Zheng, Lili Wu, Tao Wang, Xian Wang, Rongzhou Gong

Designing and fabricating an advanced metastructure absorber (MA) with lightweight, broadband, and high absorption efficiency is a promising solution to the growing electromagnetic (EM) pollution issue. Herein, the nano-graphite (NG)/polyamide 12 (PA12) composite filaments were fabricated using hot-melting processing, with the dispersion of NG particles in PA12 controlled by varying machining times. Analytical results revealed that improved dispersion of NG particles in the PA12 matrix significantly enhances the EM loss capability of the composite filaments, primarily due to increased conductive paths and interfacial contact area. Subsequently, a multilayer honeycomb structure with a bi-gradient material-structure was developed to improve the impedance matching of carbon-based composites. Simulations revealed that the proposed MA achieved a reflection loss (RL) below −10 dB in the 2–18 GHz with a relative bandwidth of up to 160 %, and exhibited a strong RL below −20 dB in the 4.2–18 GHz range. Finally, the MA was fabricated using 3D printing technology and demonstrated excellent agreement between the experimental RL and simulation results. Importantly, this research offers new insights into the modulation of EM property in carbon-based composite filaments and the design of MA with integrated broadband and high efficiency.

设计和制造一种轻量化、宽频带和高吸收效率的先进元结构吸波器是解决日益严重的电磁污染问题的一个有希望的解决方案。采用热熔法制备了纳米石墨(NG)/聚酰胺12 （PA12）复合长丝，通过不同的加工时间控制NG颗粒在PA12中的分散。分析结果表明，NG颗粒在PA12基体中分散的改善显著提高了复合丝的EM损耗能力，这主要是由于导电路径和界面接触面积的增加。随后，为了改善碳基复合材料的阻抗匹配，提出了一种双梯度材料结构的多层蜂窝结构。仿真结果表明，在相对带宽高达160%的2-18 GHz频段，该天线的反射损耗（RL）低于−10 dB，在4.2-18 GHz频段具有低于−20 dB的强RL。最后，采用3D打印技术制作了MA，实验结果与仿真结果吻合良好。重要的是，该研究为碳基复合材料长丝的电磁特性调制以及集成宽带和高效率的MA设计提供了新的见解。

{"title":"Broadband strong absorption in lightweight metastructure via multiscale modulation","authors":"Kai Cui, Lei Zheng, Lili Wu, Tao Wang, Xian Wang, Rongzhou Gong","doi":"10.1016/j.compscitech.2025.111110","DOIUrl":"10.1016/j.compscitech.2025.111110","url":null,"abstract":"<div><div>Designing and fabricating an advanced metastructure absorber (MA) with lightweight, broadband, and high absorption efficiency is a promising solution to the growing electromagnetic (EM) pollution issue. Herein, the nano-graphite (NG)/polyamide 12 (PA12) composite filaments were fabricated using hot-melting processing, with the dispersion of NG particles in PA12 controlled by varying machining times. Analytical results revealed that improved dispersion of NG particles in the PA12 matrix significantly enhances the EM loss capability of the composite filaments, primarily due to increased conductive paths and interfacial contact area. Subsequently, a multilayer honeycomb structure with a bi-gradient material-structure was developed to improve the impedance matching of carbon-based composites. Simulations revealed that the proposed MA achieved a reflection loss (RL) below −10 dB in the 2–18 GHz with a relative bandwidth of up to 160 %, and exhibited a strong RL below −20 dB in the 4.2–18 GHz range. Finally, the MA was fabricated using 3D printing technology and demonstrated excellent agreement between the experimental RL and simulation results. Importantly, this research offers new insights into the modulation of EM property in carbon-based composite filaments and the design of MA with integrated broadband and high efficiency.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"264 ","pages":"Article 111110"},"PeriodicalIF":8.3,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464670","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

Renewable superhydrophobic antifouling composite silicone based on micro-nano structure 基于微纳结构的可再生超疏水防污复合硅树脂

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-02-19 DOI: 10.1016/j.compscitech.2025.111111

Dong Tian , Kaiming Zhang , Lixin Sun , Zhihao Rong , Dejin Zhang , Lei Liu , Yahui Wu , Chuanhui Gao , Ze Kan , Yuetao Liu

The development of silicone-based superhydrophobic coatings is highly desirable for antifouling applications. However, achieving durable coatings remains challenging. Superhydrophobicity is often lost after mechanical damage or microorganism penetration, which compromises the static antifouling ability. Herein, we propose a straightforward strategy for fabricating a silicone coating (F-PIBO-40 %) based on a simple condensation reaction between a novel silane telomer (F-PIBO) and α,ω-dihydroxypolydimethylsiloxane (PDMS). Moreover, nano-sized silica particles (SiO₂) were uniformly incorporated to construct micro-nano rough structures and enhance the durability. The mechanical and environmental durability, self-cleaning, antibacterial and anti-diatom performance were comprehensively characterized. The results revealed that even after 400 damage cycles (8000 cm of wear), the contact angle remained above 165°. The superhydrophobic surface could be simply renewed through friction, minimizing the cost of use and replacement. Furthermore, the coating retained its superhydrophobic properties after exposure to UV radiation, hot/cold temperature cycling, and immersion in various polar and non-polar solvents. The synergistic effects of the isobornyl groups and the superhydrophobicity contributed to the excellent self-cleaning, antibacterial, and anti-diatom performance. We believe that this work provides a new approach for the preparation of multi-environmentally reliable, durable, and surface-renewable superhydrophobic antifouling coatings.

硅基超疏水涂料的发展是防污应用的迫切需要。然而，实现耐用涂层仍然具有挑战性。超疏水性往往在机械损伤或微生物渗透后丧失，从而影响静电防污能力。在此，我们提出了一种基于新型硅烷端粒（F-PIBO）和α，ω-二羟基聚二甲基硅氧烷（PDMS）之间的简单缩合反应制备有机硅涂层（F-PIBO- 40%）的简单策略。此外，纳米级二氧化硅颗粒（SiO2）均匀掺入，形成微纳粗糙结构，提高耐久性。对其机械和环境耐久性、自洁性、抗菌性和抗硅藻性进行了全面表征。结果表明，即使经过400次损伤循环（8000 cm磨损），接触角仍保持在165°以上。超疏水表面可以通过摩擦简单地更新，从而最大限度地降低使用和更换的成本。此外，该涂层在暴露于紫外线辐射、热/冷温度循环以及浸泡在各种极性和非极性溶剂中后仍保持其超疏水性。异龙脑基的协同作用和超疏水性使其具有优异的自清洁、抗菌和抗硅藻性能。我们相信这项工作为制备多环境可靠、耐用和表面可再生的超疏水防污涂料提供了新的途径。

{"title":"Renewable superhydrophobic antifouling composite silicone based on micro-nano structure","authors":"Dong Tian , Kaiming Zhang , Lixin Sun , Zhihao Rong , Dejin Zhang , Lei Liu , Yahui Wu , Chuanhui Gao , Ze Kan , Yuetao Liu","doi":"10.1016/j.compscitech.2025.111111","DOIUrl":"10.1016/j.compscitech.2025.111111","url":null,"abstract":"<div><div>The development of silicone-based superhydrophobic coatings is highly desirable for antifouling applications. However, achieving durable coatings remains challenging. Superhydrophobicity is often lost after mechanical damage or microorganism penetration, which compromises the static antifouling ability. Herein, we propose a straightforward strategy for fabricating a silicone coating (F-PIBO-40 %) based on a simple condensation reaction between a novel silane telomer (F-PIBO) and α,ω-dihydroxypolydimethylsiloxane (PDMS). Moreover, nano-sized silica particles (SiO<sub>2</sub>) were uniformly incorporated to construct micro-nano rough structures and enhance the durability. The mechanical and environmental durability, self-cleaning, antibacterial and anti-diatom performance were comprehensively characterized. The results revealed that even after 400 damage cycles (8000 cm of wear), the contact angle remained above 165°. The superhydrophobic surface could be simply renewed through friction, minimizing the cost of use and replacement. Furthermore, the coating retained its superhydrophobic properties after exposure to UV radiation, hot/cold temperature cycling, and immersion in various polar and non-polar solvents. The synergistic effects of the isobornyl groups and the superhydrophobicity contributed to the excellent self-cleaning, antibacterial, and anti-diatom performance. We believe that this work provides a new approach for the preparation of multi-environmentally reliable, durable, and surface-renewable superhydrophobic antifouling coatings.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"264 ","pages":"Article 111111"},"PeriodicalIF":8.3,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479698","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

Tree-inspired bio-composites with 3D anisotropic thermal and electrical conductivities prepared by parallel-engineered graphene integration 由并行工程石墨烯集成制备的具有三维各向异性导热和导电性的树启发生物复合材料

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-02-19 DOI: 10.1016/j.compscitech.2025.111112

Jin Guo , Zhengbin He , Rongjun Wei , Jingjing Gao , Runan Gao , Zhenyu Wang , Songlin Yi

In nature, numerous bio-materials exhibit anisotropic physical and chemical properties, attributable to their distinctive microstructural characteristics. Inspired by this, artificial composites can be meticulously designed to replicate such anisotropic behavior and attain targeted properties. Here, we successfully constructed wood/graphene bio-composites with parallel-aligned graphene structures by a synergistic process of electrostatic self-assembly and densification using delignified wood as a template. Through the design of parallel-arranged graphene structures, the modulation of phonon and electron transport paths is achieved and differentiated propagation properties are exhibited along different directions. This structural arrangement endows the bio-composites with unique 3D orthogonal anisotropic thermal and electrical conductivity properties. Specifically, the bio-composites integrated with 0.5 wt% graphene demonstrated thermal conductivity of 0.77, 0.25, and 0.12 W/m·K⁻¹ in the x, y, and z directions, respectively, representing a significant enhancement of 2.1–11.8 times over that of natural wood. Concurrently, the electrical conductivity in different directions was markedly improved from 10⁻¹² to 10⁻⁴-10⁰ S/cm. Furthermore, the bio-composites showcased superior tensile strength, reaching up to 79.1 MPa, along with notable flame-retardant properties. In Summary, this research provides a pioneering strategy for the preparation of composites with 3D orthogonal anisotropic thermal and electrical properties, a functionality that enables them to be used for thermal management applications such as thermal insulation and heat dissipation.

在自然界中，许多生物材料由于其独特的微观结构特征而表现出各向异性的物理和化学特性。受此启发，人工复合材料可以精心设计以复制这种各向异性行为并获得目标性能。在这里，我们以去木素化木材为模板，通过静电自组装和致密化的协同过程，成功构建了具有平行排列石墨烯结构的木材/石墨烯生物复合材料。通过设计平行排列的石墨烯结构，实现了声子和电子传输路径的调制，并在不同方向上表现出不同的传播特性。这种结构安排使生物复合材料具有独特的三维正交各向异性导热性能和导电性能。具体来说，含有0.5 wt%石墨烯的生物复合材料在x、y和z方向上的导热系数分别为0.77、0.25和0.12 W/m·K−1，比天然木材显著提高2.1-11.8倍。同时，不同方向的电导率从10−12 S/cm显著提高到10−4-100 S/cm。此外，生物复合材料显示出优异的抗拉强度，达到79.1 MPa，并具有显著的阻燃性能。总之，这项研究为制备具有三维正交各向异性热电性能的复合材料提供了一种开创性的策略，这种功能使它们能够用于热管理应用，如隔热和散热。

{"title":"Tree-inspired bio-composites with 3D anisotropic thermal and electrical conductivities prepared by parallel-engineered graphene integration","authors":"Jin Guo , Zhengbin He , Rongjun Wei , Jingjing Gao , Runan Gao , Zhenyu Wang , Songlin Yi","doi":"10.1016/j.compscitech.2025.111112","DOIUrl":"10.1016/j.compscitech.2025.111112","url":null,"abstract":"<div><div>In nature, numerous bio-materials exhibit anisotropic physical and chemical properties, attributable to their distinctive microstructural characteristics. Inspired by this, artificial composites can be meticulously designed to replicate such anisotropic behavior and attain targeted properties. Here, we successfully constructed wood/graphene bio-composites with parallel-aligned graphene structures by a synergistic process of electrostatic self-assembly and densification using delignified wood as a template. Through the design of parallel-arranged graphene structures, the modulation of phonon and electron transport paths is achieved and differentiated propagation properties are exhibited along different directions. This structural arrangement endows the bio-composites with unique 3D orthogonal anisotropic thermal and electrical conductivity properties. Specifically, the bio-composites integrated with 0.5 wt% graphene demonstrated thermal conductivity of 0.77, 0.25, and 0.12 W/m·K<sup>−1</sup> in the x, y, and z directions, respectively, representing a significant enhancement of 2.1–11.8 times over that of natural wood. Concurrently, the electrical conductivity in different directions was markedly improved from 10<sup>−12</sup> to 10<sup>−4</sup>-10<sup>0</sup> S/cm. Furthermore, the bio-composites showcased superior tensile strength, reaching up to 79.1 MPa, along with notable flame-retardant properties. In Summary, this research provides a pioneering strategy for the preparation of composites with 3D orthogonal anisotropic thermal and electrical properties, a functionality that enables them to be used for thermal management applications such as thermal insulation and heat dissipation.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"264 ","pages":"Article 111112"},"PeriodicalIF":8.3,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464553","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

Flexible triple-layer graphene composites for broadband high-absorption electromagnetic shielding 宽带高吸收电磁屏蔽用柔性三层石墨烯复合材料

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-02-14 DOI: 10.1016/j.compscitech.2025.111108

Mehran Ashouri-Sanjani , Reza Rahmati , Mahdi Hamidinejad , Chul B. Park

Electromagnetic interference (EMI) presents significant challenges in today's electronics, disrupting device performance and posing health risks. We introduce a novel flexible composite with exceptional EMI shielding effectiveness and absorption-dominated performance across the Ku-band (12.4–18 GHz). The composite features a strategically engineered triple-layer architecture: two layers of reduced graphene oxide (rGO) aerogels with aligned porosities and a dense rGO film, all embedded within a polydimethylsiloxane (PDMS) matrix. This design achieves an outstanding average absorptivity of 95.4 % and a total shielding effectiveness of 42.6 dB within a minimal thickness of 2.5 mm. The superior performance arises from meticulous tuning of each layer's electrical conductivity, optimizing impedance matching and enhancing electromagnetic absorption through multiple reflection and scattering mechanisms. Finite element method simulations elucidate the electromagnetic interactions within the multilayer structure, confirming the effectiveness of our design. This work pioneers the development of next-generation EMI shielding materials that synergistically combine high absorptivity, mechanical flexibility, and robust performance, meeting the demanding requirements of modern electronics.

电磁干扰（EMI）在当今的电子产品中提出了重大挑战，破坏设备性能并构成健康风险。我们介绍了一种新颖的柔性复合材料，具有卓越的电磁干扰屏蔽效能和在ku波段（12.4-18 GHz）的吸收主导性能。该复合材料具有精心设计的三层结构：两层具有排列孔隙的还原氧化石墨烯（rGO）气凝胶和致密的氧化石墨烯膜，均嵌入聚二甲基硅氧烷（PDMS）基质中。该设计在最小厚度为2.5 mm的情况下实现了95.4%的平均吸光度和42.6 dB的总屏蔽效率。优异的性能源于对每层电导率的细致调整，优化阻抗匹配，并通过多种反射和散射机制增强电磁吸收。有限元模拟分析了多层结构内部的电磁相互作用，验证了设计的有效性。这项工作开创了下一代EMI屏蔽材料的发展，这些材料协同结合了高吸收率、机械灵活性和强大的性能，满足了现代电子产品的苛刻要求。

{"title":"Flexible triple-layer graphene composites for broadband high-absorption electromagnetic shielding","authors":"Mehran Ashouri-Sanjani , Reza Rahmati , Mahdi Hamidinejad , Chul B. Park","doi":"10.1016/j.compscitech.2025.111108","DOIUrl":"10.1016/j.compscitech.2025.111108","url":null,"abstract":"<div><div>Electromagnetic interference (EMI) presents significant challenges in today's electronics, disrupting device performance and posing health risks. We introduce a novel flexible composite with exceptional EMI shielding effectiveness and absorption-dominated performance across the Ku-band (12.4–18 GHz). The composite features a strategically engineered triple-layer architecture: two layers of reduced graphene oxide (rGO) aerogels with aligned porosities and a dense rGO film, all embedded within a polydimethylsiloxane (PDMS) matrix. This design achieves an outstanding average absorptivity of 95.4 % and a total shielding effectiveness of 42.6 dB within a minimal thickness of 2.5 mm. The superior performance arises from meticulous tuning of each layer's electrical conductivity, optimizing impedance matching and enhancing electromagnetic absorption through multiple reflection and scattering mechanisms. Finite element method simulations elucidate the electromagnetic interactions within the multilayer structure, confirming the effectiveness of our design. This work pioneers the development of next-generation EMI shielding materials that synergistically combine high absorptivity, mechanical flexibility, and robust performance, meeting the demanding requirements of modern electronics.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"263 ","pages":"Article 111108"},"PeriodicalIF":8.3,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143421397","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

Core-double shell Ba0.5Sr0.5TiO3@SiO2@Polyethylene imine nanoparticles with built-in electric field toward enhancing dielectric energy storage 具有内置电场的核-双壳Ba0.5Sr0.5TiO3@SiO2@聚乙烯亚胺纳米颗粒增强介电能量存储

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-02-13 DOI: 10.1016/j.compscitech.2025.111107

Zihao Guo , Zhihao Sun , Peng Wang , Jingyu Bi , Guangshen Li , Jianshu Wang , Ying Sha , Zhicheng Shi , Lei Qian

In this work, a negatively charged SiO₂ inner shell and a positively charged polyethylene imine (PEI) outer shell have coated onto a Ba_0.5Sr_0.5TiO₃ (BST) nanoparticle to fabricate core-double shell structure with a built-in electric field. This innovative structure is subsequently incorporated into poly(vinylidene fluoride-co-hexafluoropropylene) (P(VDF-HFP)) and polymethyl methacrylate (PMMA) hybrid organic matrix to prepare composite films with enhanced dielectric energy storage properties. The SiO₂ inner shell effectively mitigates the uneven electric field distribution caused by dielectric constant mismatch, and the PEI organic outer shell is designed to enhance the interfacial compatibility. Additionally, the dual shell structure exhibits a significant synergistic effect resulting from the built-in electric field, which successfully impedes the acceleration of internal charges and growth of electrical trees. COMSOL Multiphysics simulation results confirm that the core-double shell structure effectively alleviates the electric field distortion, leading to improved breakdown strength. Notably, the composite film demonstrates an energy storage density of 12.72 J/cm³ under an electric field of 498.96 kV/mm with a low loading of 0.5 wt%, achieving 1.98 times that of the pure matrix. These findings provide valuable insights and directions for advanced polymer-based composite dielectric films with high energy storage densities.

本研究将带负电荷的SiO2内壳层和带正电荷的聚乙烯亚胺（PEI）外壳层涂覆在Ba0.5Sr0.5TiO3 （BST）纳米粒子上，制备了具有内置电场的核-双壳结构。这种创新结构随后被纳入聚偏氟乙烯-共六氟丙烯（P(VDF-HFP)）和聚甲基丙烯酸甲酯（PMMA）混合有机基质中，以制备具有增强介电储能性能的复合薄膜。SiO2内壳有效缓解了介电常数失配导致的电场分布不均匀，PEI有机外壳设计增强了界面相容性。此外，由于内置电场，双壳结构表现出显著的协同效应，成功地阻碍了内部电荷的加速和电树的生长。COMSOL多物理场仿真结果证实，芯-双壳结构有效缓解了电场畸变，提高了击穿强度。值得注意的是，在498.96 kV/mm的电场下，复合薄膜的储能密度为12.72 J/cm3，低负荷为0.5 wt%，是纯基体的1.98倍。这些发现为开发具有高能量存储密度的聚合物基复合介质薄膜提供了有价值的见解和方向。

{"title":"Core-double shell Ba0.5Sr0.5TiO3@SiO2@Polyethylene imine nanoparticles with built-in electric field toward enhancing dielectric energy storage","authors":"Zihao Guo , Zhihao Sun , Peng Wang , Jingyu Bi , Guangshen Li , Jianshu Wang , Ying Sha , Zhicheng Shi , Lei Qian","doi":"10.1016/j.compscitech.2025.111107","DOIUrl":"10.1016/j.compscitech.2025.111107","url":null,"abstract":"<div><div>In this work, a negatively charged SiO<sub>2</sub> inner shell and a positively charged polyethylene imine (PEI) outer shell have coated onto a Ba<sub>0.5</sub>Sr<sub>0.5</sub>TiO<sub>3</sub> (BST) nanoparticle to fabricate core-double shell structure with a built-in electric field. This innovative structure is subsequently incorporated into poly(vinylidene fluoride-co-hexafluoropropylene) (P(VDF-HFP)) and polymethyl methacrylate (PMMA) hybrid organic matrix to prepare composite films with enhanced dielectric energy storage properties. The SiO<sub>2</sub> inner shell effectively mitigates the uneven electric field distribution caused by dielectric constant mismatch, and the PEI organic outer shell is designed to enhance the interfacial compatibility. Additionally, the dual shell structure exhibits a significant synergistic effect resulting from the built-in electric field, which successfully impedes the acceleration of internal charges and growth of electrical trees. COMSOL Multiphysics simulation results confirm that the core-double shell structure effectively alleviates the electric field distortion, leading to improved breakdown strength. Notably, the composite film demonstrates an energy storage density of 12.72 J/cm<sup>3</sup> under an electric field of 498.96 kV/mm with a low loading of 0.5 wt%, achieving 1.98 times that of the pure matrix. These findings provide valuable insights and directions for advanced polymer-based composite dielectric films with high energy storage densities.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"264 ","pages":"Article 111107"},"PeriodicalIF":8.3,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479657","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

Bioinspired staggered diaphragm design of multi-cell thin-walled structures for enhancing compressive performance 生物启发交错隔膜设计的多细胞薄壁结构，以提高抗压性能

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-02-10 DOI: 10.1016/j.compscitech.2025.111104

Qianbing Tan, Jin Wang, Yisen Liu, Guangyu Sun, Huijing Gao, Yong Peng, Song Yao, Kui Wang

Inspired by the stem of the bird-of-paradise plant, a group of novel multi-cell structures with staggered diaphragm arrangements were proposed to improve their energy absorption and load fluctuation. These structures were fabricated by the fused deposition modeling technique and made from chopped carbon-fiber-reinforced polyamide. The effects of the different staggered diaphragm arrangements (SDA1, SDA2 and SDA3) on the energy absorption characteristics and deformation behaviors of multi-cell structures were investigated by the axial compression tests. The results suggested that compared to the non-staggered diaphragm arrangement (NSDA), SDA3 showed a 30.085 % increase in the specific energy absorption (SEA) and a 45.674 % decrease in the undulation of load-carrying capacity (ULC). The mechanism analysis indicated that diaphragms limited the movement of thin walls at junctions between thin walls and diaphragms, promoting the formation of plastic hinges. The staggered diaphragm design created more junctions, contributing to additional plastic hinges for energy absorption. In addition, staggered diaphragms induced the peak response forces of thin wall separation, thereby decreasing load fluctuation. Based on mechanism analysis, the superposition method was carried out to analyze the fluctuation characteristics of response force curves. The comparisons between experimental and theoretical results presented that the method was an effective and accurate analysis way for 3D-printed multi-cell structures with diaphragms.

受天极鸟植物茎的启发，提出了一组交错隔膜排列的新型多细胞结构，以提高它们的能量吸收和负荷波动。这些结构采用熔融沉积建模技术，由切碎的碳纤维增强聚酰胺制成。通过轴压试验研究了不同交错膜片布置（SDA1、SDA2和SDA3）对多胞结构吸能特性和变形行为的影响。结果表明，与非交错隔膜布置（NSDA）相比，SDA3的比能吸收（SEA）提高了30.085%，承载能力（ULC）波动降低了45.674%。机理分析表明，隔板限制薄壁与隔板连接处薄壁的运动，促进塑性铰的形成。交错隔膜设计创造了更多的连接，有助于额外的塑料铰链吸收能量。此外，交错隔板诱导了薄壁分离的峰值响应力，从而减小了荷载波动。在机理分析的基础上，采用叠加法分析了响应力曲线的波动特性。实验结果与理论结果的对比表明，该方法是一种有效、准确的3d打印膜片多胞结构分析方法。

{"title":"Bioinspired staggered diaphragm design of multi-cell thin-walled structures for enhancing compressive performance","authors":"Qianbing Tan, Jin Wang, Yisen Liu, Guangyu Sun, Huijing Gao, Yong Peng, Song Yao, Kui Wang","doi":"10.1016/j.compscitech.2025.111104","DOIUrl":"10.1016/j.compscitech.2025.111104","url":null,"abstract":"<div><div>Inspired by the stem of the bird-of-paradise plant, a group of novel multi-cell structures with staggered diaphragm arrangements were proposed to improve their energy absorption and load fluctuation. These structures were fabricated by the fused deposition modeling technique and made from chopped carbon-fiber-reinforced polyamide. The effects of the different staggered diaphragm arrangements (SDA1, SDA2 and SDA3) on the energy absorption characteristics and deformation behaviors of multi-cell structures were investigated by the axial compression tests. The results suggested that compared to the non-staggered diaphragm arrangement (NSDA), SDA3 showed a 30.085 % increase in the specific energy absorption (SEA) and a 45.674 % decrease in the undulation of load-carrying capacity (ULC). The mechanism analysis indicated that diaphragms limited the movement of thin walls at junctions between thin walls and diaphragms, promoting the formation of plastic hinges. The staggered diaphragm design created more junctions, contributing to additional plastic hinges for energy absorption. In addition, staggered diaphragms induced the peak response forces of thin wall separation, thereby decreasing load fluctuation. Based on mechanism analysis, the superposition method was carried out to analyze the fluctuation characteristics of response force curves. The comparisons between experimental and theoretical results presented that the method was an effective and accurate analysis way for 3D-printed multi-cell structures with diaphragms.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"263 ","pages":"Article 111104"},"PeriodicalIF":8.3,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143420748","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

Combining oriented ceramic skeleton and porous PDMS towards high performance flexible piezoelectric energy harvester 结合定向陶瓷骨架和多孔PDMS研制高性能柔性压电能量采集器

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-02-10 DOI: 10.1016/j.compscitech.2025.111103

Xiaosen Su, Weilin Liao, Fei Fang

Flexible piezoelectric energy harvesters (FPEHs) made of polymer-based piezoelectric composites are urgently needed for powering wearable electronics. Employing water-based freeze casting and emulsion-template method, a porous structured Barium titanate(BaTiO₃)/PDMS composite is obtained, which combines the piezoelectric ceramics with piezoelectric electret. For the BaTiO₃ ceramic skeletons, three different pore arrangements are obtained by utilizing flat-bottomed mold, wedge-shaped mold and round-table mold. The ceramic skeletons are then encapsulated with the PDMS matrix with and without porous forming ingredient. Finite element simulation is carried out to reveal the influence of the alignment of BaTiO₃ skeleton and porous PDMS on the piezoelectric behavior. The output performance is investigated for the BaTiO₃/PDMS composite upon a vibration exciter, as well as human motion. It is found that the BaTiO₃ skeleton with a scattered porous structure aligned in the horizontal direction, encapsulated with a porous PDMS possesses the most prominent output voltage and power, reaching 6.63 V and 26.46 μW, respectively upon a compressive load of 21 N at 8 Hz. Moreover, a smart insole based on the porous structured BaTiO₃/PDMS piezocomposites with both energy harvesting and posture recognition functions is constructed. The open-circuit voltage of the smart insole reachs 40 V in jumping states, and can successfully power an alarm clock. The study offers a new approach for designing of the flexible piezoelectric composites for applications in energy harvesting and posture recognition.

由聚合物基压电复合材料制成的柔性压电能量收集器（FPEHs）是为可穿戴电子设备供电的迫切需要。采用水基冷冻铸造和乳液模板法制备了一种将压电陶瓷与压电驻极体相结合的多孔结构钛酸钡/PDMS复合材料。对于BaTiO3陶瓷骨架，采用平底模具、楔形模具和圆桌模具得到了三种不同的孔隙排列方式。然后用有或没有多孔成型成分的PDMS基质封装陶瓷骨架。通过有限元模拟揭示了BaTiO3骨架和多孔PDMS的排列对压电性能的影响。研究了BaTiO3/PDMS复合材料在激振器和人体运动作用下的输出性能。结果表明，在8 Hz、21 N的压缩载荷下，具有横向排列的分散多孔结构的BaTiO3骨架具有最显著的输出电压和输出功率，分别达到6.63 V和26.46 μW。此外，基于多孔结构的BaTiO3/PDMS压电复合材料构建了具有能量收集和姿态识别功能的智能鞋垫。智能鞋垫的开路电压在跳变状态下达到40 V，可以成功为闹钟供电。该研究为柔性压电复合材料在能量收集和姿态识别中的应用提供了一种新的设计思路。

{"title":"Combining oriented ceramic skeleton and porous PDMS towards high performance flexible piezoelectric energy harvester","authors":"Xiaosen Su, Weilin Liao, Fei Fang","doi":"10.1016/j.compscitech.2025.111103","DOIUrl":"10.1016/j.compscitech.2025.111103","url":null,"abstract":"<div><div>Flexible piezoelectric energy harvesters (FPEHs) made of polymer-based piezoelectric composites are urgently needed for powering wearable electronics. Employing water-based freeze casting and emulsion-template method, a porous structured Barium titanate(BaTiO<sub>3</sub>)/PDMS composite is obtained, which combines the piezoelectric ceramics with piezoelectric electret. For the BaTiO<sub>3</sub> ceramic skeletons, three different pore arrangements are obtained by utilizing flat-bottomed mold, wedge-shaped mold and round-table mold. The ceramic skeletons are then encapsulated with the PDMS matrix with and without porous forming ingredient. Finite element simulation is carried out to reveal the influence of the alignment of BaTiO<sub>3</sub> skeleton and porous PDMS on the piezoelectric behavior. The output performance is investigated for the BaTiO<sub>3</sub>/PDMS composite upon a vibration exciter, as well as human motion. It is found that the BaTiO<sub>3</sub> skeleton with a scattered porous structure aligned in the horizontal direction, encapsulated with a porous PDMS possesses the most prominent output voltage and power, reaching 6.63 V and 26.46 μW, respectively upon a compressive load of 21 N at 8 Hz. Moreover, a smart insole based on the porous structured BaTiO<sub>3</sub>/PDMS piezocomposites with both energy harvesting and posture recognition functions is constructed. The open-circuit voltage of the smart insole reachs 40 V in jumping states, and can successfully power an alarm clock. The study offers a new approach for designing of the flexible piezoelectric composites for applications in energy harvesting and posture recognition.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"263 ","pages":"Article 111103"},"PeriodicalIF":8.3,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143421396","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

Flexural properties of sandwich panels fabricated by filament-extrusion of high-temperature thermoplastic composites

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-02-10 DOI: 10.1016/j.compscitech.2025.111106

Dogan Arslan , Mihaela Mihai , Daniel Therriault , Martin Lévesque

This study investigated the flexural properties of sandwich panel structures fabricated by the filament-extrusion 3D printing technology using novel high-temperature thermoplastic polymer composites of polyetherimide (PEI) and polyphenylene sulfide (PPS). Various formulations of PEI and PPS composites, combined with recycled carbon fiber (rCF) and thermal black (TB) particles, were manufactured. The flexural properties were assessed through a three-point bending test, comparing the performance of sandwich panels printed with these filaments and those printed with commercially available filaments. Dimensional accuracy was evaluated using a 3D scanner, revealing that 90 % of scanned points deviated a maximum of 0.2 mm from the CAD model. X-ray micro-tomography measured porosity, finding up to ∼12 % in PEI and ∼8 % in PPS skins. The microstructural analysis of the composites revealed a level of adhesion deemed acceptable between successive layers of printed parts and adequate dimensional accuracy. A digital image correlation (DIC) system assessed full-field strain and crack propagation during flexural testing, showing crack initiation due to strain concentration in the core region, consistent across all specimens. The sandwich panels printed with developed filaments exhibited comparable flexural properties to that of panels printed with commercial filaments, with a bending load capacity of up to 3.0 kN for approximately 50 g specimens. The printing quality and mechanical performance of the novel PEI and PPS composite formulations demonstrated in this study suggested that they could serve as viable alternatives to commercial filaments.

{"title":"Flexural properties of sandwich panels fabricated by filament-extrusion of high-temperature thermoplastic composites","authors":"Dogan Arslan , Mihaela Mihai , Daniel Therriault , Martin Lévesque","doi":"10.1016/j.compscitech.2025.111106","DOIUrl":"10.1016/j.compscitech.2025.111106","url":null,"abstract":"<div><div>This study investigated the flexural properties of sandwich panel structures fabricated by the filament-extrusion 3D printing technology using novel high-temperature thermoplastic polymer composites of polyetherimide (PEI) and polyphenylene sulfide (PPS). Various formulations of PEI and PPS composites, combined with recycled carbon fiber (rCF) and thermal black (TB) particles, were manufactured. The flexural properties were assessed through a three-point bending test, comparing the performance of sandwich panels printed with these filaments and those printed with commercially available filaments. Dimensional accuracy was evaluated using a 3D scanner, revealing that 90 % of scanned points deviated a maximum of 0.2 mm from the CAD model. X-ray micro-tomography measured porosity, finding up to ∼12 % in PEI and ∼8 % in PPS skins. The microstructural analysis of the composites revealed a level of adhesion deemed acceptable between successive layers of printed parts and adequate dimensional accuracy. A digital image correlation (DIC) system assessed full-field strain and crack propagation during flexural testing, showing crack initiation due to strain concentration in the core region, consistent across all specimens. The sandwich panels printed with developed filaments exhibited comparable flexural properties to that of panels printed with commercial filaments, with a bending load capacity of up to 3.0 kN for approximately 50 g specimens. The printing quality and mechanical performance of the novel PEI and PPS composite formulations demonstrated in this study suggested that they could serve as viable alternatives to commercial filaments.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"263 ","pages":"Article 111106"},"PeriodicalIF":8.3,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143402901","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

Effects of introducing MXene nanosheets on the mechanical properties of carbon fiber reinforced epoxy composite at cryogenic temperature 引入MXene纳米片对碳纤维增强环氧复合材料低温力学性能的影响

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-02-10 DOI: 10.1016/j.compscitech.2025.111102

De-Yi Qu , Fang-Liang Guo , Wan-Dong Hou , Tao Guan , Yu-Tong Fu , Jie Hao , Chao-Yi Peng , Yong-Cun Zhang , Yuan-Qing Li , Shu-Tian Liu , Shao-Yun Fu

Carbon fiber reinforced epoxy (CFRE) composites have been concerned to achieve the light weighting of cryogenic fuel tanks for large launch vehicles. However, the mismatch of the coefficients of thermal expansion (CTEs) between epoxy matrix and carbon fibers hinder the application of CFRE composites in cryogenic fuel tanks. In this paper, the CFRE-MXene composite is prepared by using an MXene-modified epoxy resin as matrix, and the effects of introducing MXene nanosheets on the mechanical properties of CFRE-MXene composite at room temperature (RT) and 90 K are comprehensively investigated. The results indicate that the mechanical properties of CFRE-MXene composite are all obviously enhanced compared with those of the CFRE without MXene, and the MXene nanosheets incorporated can not only dramatically improve the strength of epoxy matrix, but also play a bridging and interfacial interlocking role between the matrix and carbon fibers. Meanwhile, MXene can effectively reduce the CTE of the epoxy matrix and alleviate the interface damage induced by residual thermal stresses. Moreover, a mesoscopic model is proposed to qualitatively reveal the interfacial enhancement mechanism between epoxy and carbon fibers by MXene. Consequently, proper interpretations are presented for the enhanced cryogenic mechanical properties of CFRE-MXene composite by introducing MXene.

碳纤维增强环氧树脂（CFRE）复合材料是实现大型运载火箭低温燃料箱轻量化的研究热点。然而，环氧基与碳纤维的热膨胀系数不匹配，阻碍了CFRE复合材料在低温油箱中的应用。本文以MXene改性环氧树脂为基体制备了cfree -MXene复合材料，并全面研究了引入MXene纳米片对cfree -MXene复合材料在室温和90k下力学性能的影响。结果表明：与不掺MXene的CFRE相比，cfr -MXene复合材料的力学性能均有明显提高，MXene纳米片的加入不仅能显著提高环氧基的强度，而且在基体与碳纤维之间起到了桥接和界面联锁的作用。同时，MXene可以有效降低环氧基的CTE，减轻残余热应力引起的界面损伤。此外，本文还提出了一种介观模型来定性地揭示环氧树脂与碳纤维之间的界面增强机理。因此，引入MXene对cfr -MXene复合材料的低温力学性能有较好的解释。

{"title":"Effects of introducing MXene nanosheets on the mechanical properties of carbon fiber reinforced epoxy composite at cryogenic temperature","authors":"De-Yi Qu , Fang-Liang Guo , Wan-Dong Hou , Tao Guan , Yu-Tong Fu , Jie Hao , Chao-Yi Peng , Yong-Cun Zhang , Yuan-Qing Li , Shu-Tian Liu , Shao-Yun Fu","doi":"10.1016/j.compscitech.2025.111102","DOIUrl":"10.1016/j.compscitech.2025.111102","url":null,"abstract":"<div><div>Carbon fiber reinforced epoxy (CFRE) composites have been concerned to achieve the light weighting of cryogenic fuel tanks for large launch vehicles. However, the mismatch of the coefficients of thermal expansion (CTEs) between epoxy matrix and carbon fibers hinder the application of CFRE composites in cryogenic fuel tanks. In this paper, the CFRE-MXene composite is prepared by using an MXene-modified epoxy resin as matrix, and the effects of introducing MXene nanosheets on the mechanical properties of CFRE-MXene composite at room temperature (RT) and 90 K are comprehensively investigated. The results indicate that the mechanical properties of CFRE-MXene composite are all obviously enhanced compared with those of the CFRE without MXene, and the MXene nanosheets incorporated can not only dramatically improve the strength of epoxy matrix, but also play a bridging and interfacial interlocking role between the matrix and carbon fibers. Meanwhile, MXene can effectively reduce the CTE of the epoxy matrix and alleviate the interface damage induced by residual thermal stresses. Moreover, a mesoscopic model is proposed to qualitatively reveal the interfacial enhancement mechanism between epoxy and carbon fibers by MXene. Consequently, proper interpretations are presented for the enhanced cryogenic mechanical properties of CFRE-MXene composite by introducing MXene.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"263 ","pages":"Article 111102"},"PeriodicalIF":8.3,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143421394","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