Composites Part A: Applied Science and Manufacturing最新文献_第4页

Effect of molding process temperature and fiber fraction on mechanical properties of jute/PLA composite and mechanical prediction model 成型工艺温度和纤维掺量对黄麻/PLA复合材料力学性能的影响及力学预测模型

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-01-09 DOI: 10.1016/j.compositesa.2026.109571

Ning Jiang , Jixin Pei , Mingdao Wang , Shuo Wang , Yanqiu Wang

Reliable predictive models are essential for polymer-based composites to predict mechanical properties and reduce costly trial-and-error manufacturing. The classical Rule of Mixture (ROM) model can predict the tensile properties of synthetic fiber-reinforced polymer composites, but it lacks accuracy for natural fiber-reinforced composites due to natural fiber’s inherent variability. This study proposes improved ROM models considering molding temperature and fiber mass fraction affecting mechanical property of jute fabric polylactic acid (PLA) composites. Plain jute fabric was alkali-treated (10 wt% NaOH, 2 h), and jute/PLA composites were fabricated by compression molding through alternate stacking of PLA with unidirectional jute yarns or plain-woven jute fabrics at different molding temperatures and fiber mass fractions. Below PLA’s melting point (160°C), insufficient matrix flowability hinders fiber impregnation, resulting in decreased composite strength. Conversely, excessively high temperatures induce thermal degradation of jute fibers, compromising the mechanical integrity of the composite, as the tensile strength of jute fabric/PLA composites decreases from 51.46 to 18.56 MPa when molding temperature increased from 160 to 200°C. The influence of fiber mass fraction on tensile strength of jute fabric/PLA composites exhibits a two-stage pattern. Increasing fiber mass fraction initially enhances the tensile strength of composites, but when it exceeds 26%, the tensile strength decreases due to inadequate impregnation. The improved ROM model introduced temperature influence parameter and porosity factors to consider the influence mechanisms of temperature and volume fraction on composite material properties, significantly enhancing prediction accuracy for the tensile strength of jute/PLA composites.

可靠的预测模型对于预测聚合物基复合材料的机械性能和减少昂贵的试错制造至关重要。经典的混合规律（ROM）模型可以预测合成纤维增强聚合物复合材料的拉伸性能，但由于天然纤维固有的可变性，该模型对天然纤维增强复合材料的拉伸性能缺乏准确性。本文提出了考虑成型温度和纤维质量分数对黄麻织物聚乳酸（PLA）复合材料力学性能影响的改进ROM模型。对普通黄麻织物进行碱处理（10 wt% NaOH, 2 h），在不同成型温度和纤维质量分数下，将PLA与单向黄麻纱线或平纺黄麻织物交替堆叠，通过压缩成型制备黄麻/PLA复合材料。在PLA的熔点（160℃）以下，基体流动性不足阻碍了纤维浸渍，导致复合材料强度下降。反之，过高的温度会导致黄麻纤维热降解，影响复合材料的机械完整性，当成型温度从160℃升高到200℃时，黄麻织物/PLA复合材料的抗拉强度从51.46 MPa降低到18.56 MPa。纤维质量分数对黄麻/PLA复合材料抗拉强度的影响呈现两阶段规律。增加纤维质量分数可以提高复合材料的抗拉强度，但当纤维质量分数超过26%时，由于浸渍不足，抗拉强度下降。改进的ROM模型引入温度影响参数和孔隙率因素，考虑温度和体积分数对复合材料性能的影响机理，显著提高了黄麻/PLA复合材料抗拉强度的预测精度。

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引用次数: 0

Physicochemical and biological evaluation of Bioinspired Zea mays starch-derived self-healing composite hydrogels with dynamic boronate crosslinks for critical bone defects 具有动态硼酸交联的玉米淀粉衍生自愈复合水凝胶用于关键骨缺损的物理化学和生物学评价

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-01-09 DOI: 10.1016/j.compositesa.2026.109573

Aqsa Afzaal , Mazhar Amjad Gilani , Catherine Petit , Olivier Huck , Sobia Tabassum

Bioinspired self-healing hydrogels were developed as a minimally invasive, bioactive platform to overcome the inherent limitations of conventional bone scaffolds, using Zea mays starch (ZS), poly(vinyl alcohol) (PVA), and hydroxyapatite (HA), crosslinked through dynamic boronate ester bonds. The ZS-series hydrogels exhibited remarkable shape adaptability, syringe extrudability, and rapid self-healing within 3–5 s. FTIR supported boronate complexation, while XRD indicated retained HA crystallinity. Improved thermal stability and moderate wettability (contact angle 66–75°) supported cell adhesion. Rheological analyses revealed G′ > G″ with excellent thixotropic recovery, ensuring mechanical integrity and extrudability under conditions relevant to minimally invasive delivery. The hydrogels exhibited shear-thinning behavior and ionic conductivity, highlighting potential for bioelectrical stimulation during tissue repair. Among formulations, ZS1.4 displayed optimal recovery after high-strain disruption and balanced physicochemical performance. Hemolysis ratios below 5 %, suppressed TNF-α (p < 0.0001), and fibroblast and epithelial cells viability comparable to controls confirmed biocompatibility. In vitro scratch assays showed accelerated wound closure, and in vivo critical calvarial defect studies demonstrated substantial osteogenic and new bone formation without adverse effects. Overall, ZS1.4 presented the best combination of structural stability, bioactivity, and regenerative potential, by integrating high HA loading with rapid network reversibility, establishing it as a multifunctional, self-healing scaffold for minimally invasive bone tissue engineering.

生物灵感自愈水凝胶是一种微创的生物活性平台，克服了传统骨支架的固有局限性，它使用玉米淀粉（ZS）、聚乙烯醇（PVA）和羟基磷灰石（HA），通过动态硼酸酯键交联。zs系列水凝胶具有良好的形状适应性、注射器挤出性和3-5 s内快速自愈性。FTIR支持硼酸络合，而XRD表明保留了HA结晶度。改进的热稳定性和适度的润湿性（接触角66-75°）支持细胞粘附。流变学分析显示，G ' >； G″具有优异的触变性恢复能力，在微创分娩条件下确保机械完整性和可压缩性。水凝胶表现出剪切变薄行为和离子电导率，突出了组织修复过程中生物电刺激的潜力。其中ZS1.4在高应变破坏后恢复效果最佳，理化性能平衡。溶血率低于5%，抑制TNF-α (p < 0.0001)，成纤维细胞和上皮细胞活力与对照组相当，证实了生物相容性。体外划伤实验显示伤口愈合加速，体内临界颅骨缺损研究显示大量成骨和新骨形成无不良反应。综上所述，ZS1.4通过将高HA负荷与快速网络可逆性相结合，将其作为一种多功能、自修复的微创骨组织工程支架，呈现出结构稳定性、生物活性和再生潜力的最佳组合。

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引用次数: 0

Evaluation of the informed isotropic (IISO) viscosity model for compression molding of discontinuous fiber reinforced polymers 不连续纤维增强聚合物压缩成型的通知各向同性（IISO）粘度模型的评价

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-01-08 DOI: 10.1016/j.compositesa.2025.109552

Louis Schreyer, Constantin Krauß, Florian Wittemann, Luise Kärger

The informed isotropic (IISO) viscosity model has gained popularity as a surrogate for fourth-order tensor viscosity models in simulating injection and compression molding of discontinuous fiber reinforced composites in industrial applications, primarily to overcome numerical challenges that are especially pronounced in long fiber reinforced materials. In addition, the IISO model can be easily integrated into (commercial) isotropic frameworks. The central idea is to equate the energy dissipation rates resulting from a fully anisotropic and an isotropic viscous material model, which allows deriving a scalar surrogate viscosity that depends on the local fiber orientation. However, the model’s fundamental capability to predict anisotropic flow behavior in compression molding remains limited. This work comprehensively assesses the IISO viscosity model’s capabilities through analytical and numerical investigations of fundamental flow scenarios. We demonstrate that the IISO viscosity model cannot generate elliptical deformation in lubricated squeeze flow of initially cylindrical samples with spatially homogeneous and anisotropic initial fiber orientation states, confirming the model’s inherent limitation due to stress–strain-rate coaxiality. When we extend the analysis to non-lubricated squeeze flow, the results emphasize that the IISO viscosity model also fails to produce anisotropic flow regardless of the spatially homogeneous and (aligned) orthotropic initial fiber orientation state. Furthermore, we demonstrate that the compression-molding-style center-gated disk benchmark is inconclusive, as the flow trajectory depends on the magnitude of the imposed perturbation rather than the fiber orientation. The perturbation also introduces a physically implausible circumferential vortex. Finally, we discuss potential sources of apparent anisotropic behavior in numerical flow simulations in the literature and highlight the challenges of parameterizing the IISO viscosity model experimentally.

信息各向同性（IISO）粘度模型作为四阶张量粘度模型的替代品，在工业应用中模拟不连续纤维增强复合材料的注射和压缩成型，主要是为了克服在长纤维增强材料中特别明显的数值挑战。此外，IISO模型可以很容易地集成到（商业的）各向同性框架中。中心思想是将完全各向异性和各向同性粘性材料模型产生的能量耗散率等同起来，从而可以推导出依赖于局部纤维取向的标量替代粘度。然而，该模型预测压缩成型中各向异性流动行为的基本能力仍然有限。这项工作通过对基本流动情景的分析和数值研究，全面评估了IISO粘度模型的能力。我们证明了IISO粘度模型在具有空间均匀和各向异性初始纤维取向状态的初始圆柱形样品的润滑挤压流动中不能产生椭圆变形，证实了该模型由于应力-应变率同轴性而固有的局限性。当我们将分析扩展到非润滑挤压流动时，结果强调IISO粘度模型也不能产生各向异性流动，无论空间均匀和（排列）正交异性初始纤维取向状态如何。此外，我们证明了压缩成型式中心门控盘基准是不确定的，因为流动轨迹取决于施加扰动的大小而不是纤维方向。扰动还引入了物理上难以置信的周向涡。最后，我们讨论了文献中数值流动模拟中表观各向异性行为的潜在来源，并强调了实验参数化IISO粘度模型的挑战。

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引用次数: 0

Ablation-resistant shape memory polyimide composite aerogels with exceptional high temperature response for smart thermal protection 耐烧蚀形状记忆聚酰亚胺复合气凝胶具有特殊的高温响应智能热保护

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-01-08 DOI: 10.1016/j.compositesa.2026.109570

Zhaoyang Tang, Xu Zhang, Leihao Su, Pengjie You, Xuan Li, Wei Fan, Tianxi Liu

Shape memory polyimide aerogel (SMPIA), a novel class of intelligent deformable material, has attracted significant attention in aerospace and advanced engineering fields due to its unique combination of low density, porous structure, and exceptional thermostability under extreme conditions. However, the SMPIA has certain defects such as severe volume shrinkage during the moulding process, slow recovery, and irreversible shape change at extreme temperatures (e.g., under direct flame exposure). The alumina (Al₂O₃) is often used to optimize material properties due to its excellent thermal stability and mechanical properties. In this work, the shape memory polyimide composite aerogels (SMPICAs) were prepared by incorporating the Al₂O₃ ceramic particles as the reinforcing phases to effectively solve the significant volume shrinkage during the preparation process, and the SMPICAs exhibit favourable thermal insulation and ablation resistance. Under high-temperature testing, the SMPICAs demonstrated the great shape memory performance and cycling stability over multiple cycles. In the fifth shape memory cycle, both the shape fixation and recovery ratio exceeded 97 %. The SMPICAs can complete shape recovery when exposed to the flame within 8 s and almost maintain the original shape, which displays important application potential in the fields of aerospace and intelligent thermal protection systems, etc.

形状记忆聚酰亚胺气凝胶（SMPIA）是一类新型的智能可变形材料，由于其独特的低密度、多孔结构和极端条件下优异的热稳定性，在航空航天和先进工程领域受到了广泛关注。然而，SMPIA有一定的缺陷，如在成型过程中严重的体积收缩，缓慢的恢复，以及在极端温度下（例如，在直接火焰照射下）不可逆的形状变化。氧化铝（Al2O3）由于其优异的热稳定性和机械性能，经常被用于优化材料性能。本文采用Al2O3陶瓷颗粒作为增强相，制备了形状记忆聚酰亚胺复合气凝胶（SMPICAs），有效地解决了制备过程中显著的体积收缩问题，并且SMPICAs具有良好的保温性能和抗烧蚀性能。在高温测试中，SMPICAs表现出良好的形状记忆性能和多次循环的稳定性。在第5个形状记忆周期中，形状固定率和恢复率均超过97%。SMPICAs在8 s内可完全恢复形状，几乎保持原有形状，在航空航天、智能热防护系统等领域显示出重要的应用潜力。

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引用次数: 0

Multifunctional carbon nanotube@expanded graphite/polydimethylsiloxane composites with exceptional electromagnetic interference shielding and thermal management capability 多功能碳nanotube@expanded石墨/聚二甲基硅氧烷复合材料具有卓越的电磁干扰屏蔽和热管理能力

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-01-06 DOI: 10.1016/j.compositesa.2026.109563

Zifu Zhu , Dan Liu , Tianzeng Hong , Jie Xue , Chuanbing Li , Yuxuan Sun , Xiaobo Gao , Qingbin Zheng

Multifunctional electromagnetic interference (EMI) shielding composites with integrated thermal management capability are in high demand for modern electronic devices. However, porous-structured EMI shielding materials inherently exhibit poor thermal conductivities. Herein, a carbon nanotube (CNT)@expanded graphite (EG)/polydimethylsiloxane (PDMS) composite with both excellent EMI shielding and thermal management performance is designed and fabricated by integrating CNT networks into the EG framework via chemical vapor deposition (CVD), followed by PDMS infiltration. Based on the hierarchical porous architecture and three-dimensional (3D) electrically conductive network, the CNT@EG/PDMS composite exhibits ultrahigh EMI shielding effectiveness (SE) in the X-band (8.2–12.4 GHz) along both vertical (79.1 dB) and horizontal (61.7 dB) directions. Concurrently, due to the formation of a 3D thermally conductive network, the CNT@EG/PDMS achieves impressive in-plane (11.64 W·m⁻¹·K⁻¹) and out-of-plane (1.31 W·m⁻¹·K⁻¹) thermal conductivities (TC) at a CNT@EG loading of 18.7 wt%. Additionally, when subjected to a 1.5 V voltage, the CNT@EG/PDMS composite exhibits rapid and efficient Joule heating, achieving a high temperature of 98.6 °C within 30 s. The newly designed CNT@EG/PDMS composites with superior EMI SE, TC and Joule heating provide new insights into the design of highly integrated electronic materials for next-generation EMI shielding and thermal management.

具有综合热管理能力的多功能电磁干扰屏蔽复合材料在现代电子器件中有着很高的需求。然而，多孔结构的电磁干扰屏蔽材料固有地表现出较差的导热性。本文通过化学气相沉积（CVD）将碳纳米管（CNT）网络集成到膨胀石墨(EG)/聚二甲基硅氧烷（PDMS）框架中，然后通过PDMS渗透，设计和制造了具有优异EMI屏蔽和热管理性能的碳纳米管（CNT）@膨胀石墨(EG)/聚二甲基硅氧烷（PDMS）复合材料。基于分层多孔结构和三维（3D）导电网络，CNT@EG/PDMS复合材料在垂直（79.1 dB）和水平（61.7 dB）方向的x波段（8.2-12.4 GHz）具有超高的电磁干扰屏蔽效能（SE）。同时，由于三维导热网络的形成，CNT@EG/PDMS在CNT@EG负载为18.7 wt%时获得了令人印象深刻的面内（11.64 W·m−1·K−1）和面外（1.31 W·m−1·K−1）导热系数（TC）。此外，当受到1.5 V电压时，CNT@EG/PDMS复合材料表现出快速有效的焦耳加热，在30秒内达到98.6°C的高温。新设计的CNT@EG/PDMS复合材料具有卓越的EMI SE， TC和焦耳加热，为下一代EMI屏蔽和热管理的高度集成电子材料的设计提供了新的见解。

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引用次数: 0

Reversible interfacial chemistry enables closed-loop recycling and highly thermal conductivity of EPDM/waste rubber composites 可逆界面化学使EPDM/废橡胶复合材料的闭环回收和高导热性成为可能

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-01-06 DOI: 10.1016/j.compositesa.2026.109562

Hongmin Sun , Xu Han , Dewang Hou , Kai Zheng , Yuze Xu , Chunlin Li , Ruiguang Li , Chengjie Li

Elastic thermal interface materials (TIMs) are essential for electronics thermal management, yet conventional elastomers struggle to achieve high thermal conductivity at low filler loadings while retaining recyclability. Concurrently, high-value upcycling of waste rubber powder (WRP) remains challenging. Herein, a sustainable, highly thermal conductive ethylene-propylene-diene monomer (EPDM)-IA/PA@Al₂O₃/WRP/CNTs TIM with closed-loop physical/chemical recyclability was engineered through dynamic interfacial chemistry and multiscale thermal conductive pathways. Esterification formed dynamic β-carboxy ester bonds between phytic acid-modified alumina (PA@Al₂O₃) and itaconic anhydride-functionalized EPDM (EPDM-IA), while Zn²⁺ coordination interacted with ring-opened anhydride groups to form supramolecular linkages. Incorporation of CNTs to bridge PA@Al₂O₃ established nanoscale heat transfer network, and utilization of WRP to promote macroscopic thermal pathways via volume exclusion. The optimized composite achieved an exceptional thermal conductivity of 2.2 W/m·K, meanwhile exhibiting excellent thermal aging resistance, mechanical/thermal conduction property retention, rapid temperature response and efficient photothermal conversion, significantly reducing CPU operating temperature. This work establishes a paradigm for designing sustainable TIMs through synergistic dynamic bonding and multi-scale thermal pathway engineering, simultaneously advancing electronics heat dissipation and high-value WRP upcycling.

弹性热界面材料（TIMs）对于电子产品的热管理至关重要，但传统弹性体难以在低填充量下实现高导热性，同时保持可回收性。与此同时，废胶粉（WRP）的高价值升级回收仍然具有挑战性。本文通过动态界面化学和多尺度导热途径，设计了一种具有闭环物理/化学可循环性的可持续高导热乙丙二烯单体(EPDM)-IA/PA@Al2O3/WRP/CNTs TIM。植酸修饰氧化铝（PA@Al2O3）与衣壳酸酐功能化EPDM （EPDM- ia）之间的酯化反应形成了动态的β-羧基酯键，而Zn2+配位与开环酸酐基团相互作用形成超分子键。CNTs作为桥接PA@Al2O3建立了纳米尺度的传热网络，并利用WRP通过体积排斥促进宏观热途径。优化后的复合材料导热系数为2.2 W/m·K，同时具有优异的热老化性能、机械/热传导性能、快速的温度响应和高效的光热转换，显著降低了CPU的工作温度。该研究为通过协同动态键合和多尺度热路径工程设计可持续TIMs建立了一个范例，同时推进了电子散热和高价值WRP升级回收。

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引用次数: 0

Advancing regenerated leather from waste leather fibers: Robustness and thermal/water comfort 推进再生皮革从废皮革纤维：坚固性和热/水舒适性

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-01-06 DOI: 10.1016/j.compositesa.2026.109566

Zhishuang Zhu, Youjia Yang, Guixiang Ding, Xiaoxia Lin, Liulian Huang, Jianguo Li, Lihui Chen

The growing demand for leather has led to large quantities of waste leather fibers (WLFs), posing environmental concerns. Regenerated leather (RL) prepared from WLFs offers a sustainable solution, yet dry-forming methods often yield low strength, poor uniformity, and low efficiency. Here, we developed strong, uniform, and cost-effective regenerated leather (CPRL) via a wet-forming process combining hot-pressing, densification, and macromolecular crosslinking with the cationic polyacrylamide (CPAM). Hot-pressing densifies the structure and enhances hydrogen bonding, and correspondingly increases tensile strength from 0.05 N/m² to 3.19 N/m², tear strength from 0.39 N/mm to 9.44 N/mm, and bursting strength from 0.89 N/mm to 16.80 N/mm. Subsequent the CPAM crosslinking further increases tensile strength to 6.16 N/m², tear strength to 18.11 N/mm, and burst strength to 54.86N/mm. Except for the increased hydrogen bonding, the CPAM additionally enables the strong electrostatic interactions, thus yielding superior mechanical performance of CPRL and hydrophobicity (water contact angle of 115.1°). In addition, the CPRL also exhibits higher thermal conductivity (from 0.078 to 0.152 W/m·K⁻¹) and faster water evaporation (from 0.062 to 0.44 g/min), and correspondingly demonstrates thermal and moisture comfort. The developed wet-forming methodology opens a new door for manufacturing high-performance regenerated leather from the WLFs toward useful applications.

对皮革日益增长的需求导致了大量的废弃皮革纤维（WLFs），引起了环境问题。由wlf制备的再生皮革（RL）提供了可持续的解决方案，但干燥成型方法通常强度低，均匀性差，效率低。在这里，我们通过热压、致密化和阳离子聚丙烯酰胺（CPAM）的大分子交联相结合的湿成型工艺，开发出了坚固、均匀且具有成本效益的再生皮革（CPRL）。热压使结构致密，氢键增强，抗拉强度由0.05 N/m2提高到3.19 N/m2，撕裂强度由0.39 N/mm提高到9.44 N/mm，破裂强度由0.89 N/mm提高到16.80 N/mm。随后，CPAM交联进一步提高抗拉强度至6.16 N/m2，撕裂强度至18.11 N/mm，破裂强度至54.86N/mm。除了增加氢键外，CPAM还使其具有较强的静电相互作用，从而具有优异的CPRL力学性能和疏水性（水接触角为115.1°）。此外，CPRL还具有较高的导热系数（从0.078到0.152 W/m·K−1）和更快的水分蒸发（从0.062到0.44 g/min），并具有相应的热湿舒适性。开发的湿成型方法为制造高性能再生皮革打开了一扇新的大门，从WLFs到有用的应用。

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引用次数: 0

CNT reinforced Cu-based composites: Dispersion, interface and machine learning-assisted collaborative optimization strategies 碳纳米管增强铜基复合材料：分散、界面和机器学习辅助协同优化策略

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-01-06 DOI: 10.1016/j.compositesa.2026.109565

XianFeng Zhao, ChangChun Ge

The intrinsic trade-off between tensile strength and electrical conductivity remains the central obstacle in developing high-performance copper matrix composites. Carbon nanotubes (CNTs) offer remarkable reinforcement to mechanical properties but inevitably compromise conductivity. Despite advances in dispersion techniques and interfacial engineering, achieving efficient synergistic optimization of both properties is still constrained by the trial-and-error nature of conventional approaches. This review highlights recent progress in CNTs/Cu composites, emphasizing dispersion control, interfacial structure design, and strategies for balancing mechanical and electrical performance. Particular attention is given to emerging machine learning (ML)-assisted methodologies that integrate experimental and simulation data to unravel complex multi-parameter interactions. Among these, Physics-Informed Machine Learning (Physics-Informed ML) demonstrates strong potential to overcome performance bottlenecks, providing a transferable pathway for multi-property optimization in CNTs/Cu and other CNT-reinforced composites.

抗拉强度和导电性之间的内在权衡仍然是开发高性能铜基复合材料的主要障碍。碳纳米管（CNTs）提供了显著的机械性能增强，但不可避免地损害了导电性。尽管在分散技术和界面工程方面取得了进步，但要实现这两种性质的有效协同优化仍然受到传统方法的试错性质的限制。本文综述了CNTs/Cu复合材料的最新进展，重点介绍了分散控制、界面结构设计以及平衡机械和电气性能的策略。特别关注新兴的机器学习（ML）辅助方法，这些方法集成了实验和模拟数据，以揭示复杂的多参数交互。其中，物理信息机器学习（物理信息ML）显示出克服性能瓶颈的强大潜力，为CNTs/Cu和其他碳纳米管增强复合材料的多性能优化提供了可转移的途径。

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引用次数: 0

Ballistic behavior of bi-axial pre-tensioned textile-laminate composite structure 双轴预张拉纺织-层压复合材料结构的弹道性能

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-01-06 DOI: 10.1016/j.compositesa.2026.109567

Jian Wei , Haoxiang Wang , Shenghua Shang , Tian Jian Lu , Jiagui Liu , Jian Deng , Han Meng , Jinling Gao

This study proposed a novel impact-resistant composite structure integrating bi-axial pre-tensioned aramid fabric with composite laminates and experimentally investigated its ballistic response. A custom fixture was designed to ensure stable specimen clamping and enable real-time bi-axial preload monitoring and adjustment. Using a single-stage light gas gun combined with high-speed photography, the dynamic deformation and failure processes under high-velocity impact were captured. An in-plane scale-based method was developed to measure back face signature, facilitating characterization of out-of-plane deformation, transverse wave propagation, and residual projectile velocity. Post-impact analysis via optical macrography and scanning electron microscopy (SEM) revealed macro-meso-micro multiscale failure morphologies. Results indicated that, unlike conventional monolithic fabrics or composites, the proposed structure exhibited four distinct failure modes under ballistic impact, dependent on preload and impact velocity. Three critical velocities were identified, corresponding to the penetration resistance of the aramid laminate, the perforation resistance of the aramid fabric, and the overall penetration resistance of the composite structure. Furthermore, both the ballistic limit and energy absorption initially increase and then decrease with increasing preload, reaching peak values of 458.45 m/s and 211.23 J, respectively, at a preload of 500 N. Preload was also found to effectively reduce out-of-plane deformation during high-velocity impact while accelerating transverse wave propagation, thereby enhancing energy dissipation efficiency.

提出了一种将双轴预拉伸芳纶织物与复合层压板相结合的新型抗冲击复合材料结构，并对其弹道响应进行了实验研究。设计了定制夹具，以确保稳定的试样夹紧，并实现实时双轴预紧监测和调整。采用单级光气枪结合高速摄影技术，捕捉了高速冲击下的动态变形和破坏过程。提出了一种基于面内尺度的背面特征测量方法，便于对面外变形、横波传播和残余弹丸速度进行表征。撞击后通过光学宏观和扫描电镜（SEM）分析揭示了宏观-细观-微观多尺度的破坏形态。结果表明，与传统的单片织物或复合材料不同，该结构在弹道冲击下表现出四种不同的破坏模式，这取决于预载荷和冲击速度。确定了三个临界速度，分别对应芳纶层板的穿透阻力、芳纶织物的穿透阻力和复合材料结构的整体穿透阻力。随着预紧力的增大，弹道极限和能量吸收均呈现先增大后减小的趋势，在预紧力为500 n时分别达到峰值458.45 m/s和211.23 J，预紧力还能有效减少高速撞击时的面外变形，加速横波传播，从而提高能量耗散效率。

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引用次数: 0

Fiber-orientation Fe/Fe3O4@C@SiO2 heterostructures with magnetoelectric coupling and double-losses for effective microwave absorption 具有磁电耦合和双损耗的光纤取向Fe/Fe3O4@C@SiO2异质结构的有效微波吸收

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-01-06 DOI: 10.1016/j.compositesa.2026.109564

Le Gao , Shengzhe Zhao , Bo Xiong , Suyun Tian , Rui Zhou , Yang Guo , Xian Jian , Shaoming Dong

Microwave absorbing materials face the challenge of dispersion and uniform orientation in the pursuit of coupling magnetic and electrical losses. Herein, fiber-orientation Fe/Fe₃O₄@CNFs@SiO₂ (FFCS) heterostructures are designed to possess magnetic and dielectric losses, enabling effective microwave absorption. For precise control, Fe/Fe₃O₄ nanoparticles (∼30 nm) were uniformly embedded inside carbon nanofibers (CNFs, ∼400 nm) through electrospinning and subsequent carbonization to prepare Fe/Fe₃O₄@CNFs. Followed by SiO₂ coating, the FFCS heterostructures were obtained that feature an aligned-fiber architecture and a uniform dispersion of magnetic Fe/Fe₃O₄ nanocrystals. This interconnected, high-density carbon conductive networks significantly enhance electron mobility, thereby promoting dielectric dissipation. Meanwhile, interfacial polarization arising from the multi-component heterointerfaces is finely tuned to optimize impedance matching. Then as-fabricated heterostructures exhibits synergistic superior microwave absorption performance. This FFCS exhibits a minimal reflection loss of −54.04 dB at a thickness of 1.32 mm, and the effective absorption bandwidth is about 4.14 GHz. This coupling electrospinning and carbonization approaches to design the fiber-oriented arrangement of magnetic matter provide a new route for impedance adjustment and boosting microwave absorption in high-performance carbon composite fibers.

微波吸收材料在追求磁、电耦合损耗的过程中，面临着色散和均匀取向的挑战。在这里，光纤取向的Fe/Fe3O4@CNFs@SiO2 （FFCS）异质结构被设计成具有磁性和介电损耗，从而实现有效的微波吸收。为了精确控制，通过静电纺丝和随后的碳化，将Fe/Fe3O4纳米颗粒（~ 30 nm）均匀嵌入碳纳米纤维（CNFs, ~ 400 nm）中，制备Fe/Fe3O4@CNFs。然后涂覆SiO2，得到具有排列纤维结构和均匀分散的磁性Fe/Fe3O4纳米晶的FFCS异质结构。这种相互连接的高密度碳导电网络显著提高了电子迁移率，从而促进了介电损耗。同时，对多分量异质界面产生的界面极化进行了微调，优化了阻抗匹配。制备的异质结构具有优异的协同微波吸收性能。该FFCS在厚度为1.32 mm时的反射损耗最小，为−54.04 dB，有效吸收带宽约为4.14 GHz。这种耦合静电纺丝和碳化的方法设计了磁性物质的纤维取向排列，为高性能碳复合纤维的阻抗调节和提高微波吸收提供了新的途径。

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