Composites Science and Technology最新文献_第8页

Corrigendum to: Enhanced radiation shielding performance of tungsten borides-epoxy composites [Composites Science and Technology, (269), 2025, 111233 DOI: https://doi.org/10.1016/j.compscitech.2025.111233] 钨硼化物-环氧复合材料增强辐射屏蔽性能[j] .复合材料科学与技术，（269），2025,111233 DOI: https://doi.org/10.1016/j.compscitech.2025.111233]

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

Composites Science and Technology

Pub Date : 2026-02-08 Epub Date: 2025-11-20 DOI: 10.1016/j.compscitech.2025.111448

Furkan Erdogan, Santiago Bermudez, Reza Mohammadi, Jessika V. Rojas

引用次数: 0

Bioinspired gradient-modulus interfacial strategy for high-strength and EMI-shielding carbon fiber composites 高强度和emi屏蔽碳纤维复合材料的仿生梯度模量界面策略

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

Composites Science and Technology

Pub Date : 2026-02-08 Epub Date: 2025-12-01 DOI: 10.1016/j.compscitech.2025.111469

Wenlong Hu , Lulu Yang , Fuzheng Guo , Fuzhen Xuan , Shuzheng Zhang , Xu Ma , Jie Zhi , Yu Cang , Bin Yang

The rapid growth of electronic communications has intensified electromagnetic pollution, creating an urgent need for lightweight, high-performance electromagnetic interference (EMI) shielding materials. Carbon fiber reinforced polymer composites (CFRPs) are attractive candidates due to their high specific strength, stiffness, and design flexibility, but their practical application is limited by inherently weak fiber-matrix interfaces and electrical conductivity significantly lower than metals. Inspired by the strong, versatile adhesion of mussels, we developed a hybrid coating on carbon fiber through sequential deposition of Fe³⁺-tannic acid metal-phenolic networks (MPNs), followed by in situ growth of silver nanoparticles (Ag NPs) via catechol-mediated reduction. This MPN-Ag hybrid network effectively enhances both interfacial mechanics and electrical properties. Mechanically, the smooth modulus gradient created by the hybrid interphase improves stress transfer and promotes cohesive resin failure, resulting in remarkable enhancements in interfacial property, with interfacial shear strength and transverse fiber bundle strength increasing by 85 % and 67 %, respectively. Moreover, the conductive MPN-Ag layer facilitates multiple EMI attenuation mechanisms, including reflection, conduction, and interfacial polarization losses, achieving an outstanding EMI shielding effectiveness of 22.7 dB at just 1 mm thickness. This facile, scalable strategy integrates structural reinforcement with functional performance, offering a pathway to multifunctional CFRPs capable of simultaneous mechanical robustness and effective EMI shielding. Such an approach advances the development of next-generation CFRPs for aerospace, electronics, and other advanced structural-functional applications, bridging the gap between high-performance composites and emerging multifunctional material demands.

电子通信的快速发展加剧了电磁污染，迫切需要轻质、高性能的电磁干扰屏蔽材料。碳纤维增强聚合物复合材料（CFRPs）因其高比强度、刚度和设计灵活性而成为有吸引力的候选材料，但其实际应用受到固有的纤维基体界面薄弱和导电性明显低于金属的限制。受贻贝强大而多样的粘附力的启发，我们通过顺序沉积Fe3+-单宁酸金属-酚网络（mpn），然后通过儿茶酚介导的还原原位生长银纳米粒子（Ag NPs），在碳纤维上开发了一种混合涂层。这种MPN-Ag混合网络有效地提高了界面力学性能和电学性能。从力学角度来看，杂化界面形成的光滑模量梯度改善了应力传递，促进了树脂的内聚破坏，从而显著增强了界面性能，界面剪切强度和横向纤维束强度分别提高了85%和67%。此外，导电的MPN-Ag层促进了多种EMI衰减机制，包括反射、传导和界面极化损耗，在1毫米厚度下实现了22.7 dB的出色EMI屏蔽效果。这种简单、可扩展的策略将结构加固与功能性能相结合，为同时具有机械稳健性和有效电磁干扰屏蔽的多功能cfrp提供了一条途径。这种方法推动了下一代cfrp的发展，用于航空航天、电子和其他先进的结构功能应用，弥合了高性能复合材料与新兴多功能材料需求之间的差距。

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引用次数: 0

Comparison of flexural properties of two different CFRPs before and after low-velocity impact: T1000 vs T300 interleaved with micro-/nano- Aramid fibers T1000与T300与微/纳米芳纶纤维交织低速冲击前后两种不同cfrp抗弯性能的比较

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

Composites Science and Technology

Pub Date : 2026-02-08 Epub Date: 2025-11-04 DOI: 10.1016/j.compscitech.2025.111428

Mingxin Ye , Yabin Deng , Yunsen Hu , Xiaozhi Hu

T1000 carbon fibers are far superior to T300 fibers in tension, but the performance of bulk T1000 composites can be matched by bulk T300 composites interleaved with sparsely distributed micro-/nano- Aramid pulp (AP) fibers. In this study, we focus not only on the short-beam shear strength but also on the flexural strength of T1000 and T300-AP composites before and after impact, as these properties are critical indicators of structural performance under bending-dominated loading conditions. Maintaining the AP-epoxy interlayer thickness increase at 8 μm or less, with AP areal densities of 2, 4 and 6 g/m², leads to improvements of up to 38 % in short-beam shear strength and 55 % in flexural strength for the T300-AP composites, surpassing the performance of plain T1000 composites without such AP-interfacial toughening. These findings highlight the importance of interfacial design and quasi-Z-directional fiber bridging in CFRPs, demonstrating that resin-rich layers between carbon fiber plies as thin as 15 μm can be transformed into mechanically interlocked ply interfaces through AP-interfacial toughening, thereby bringing the structural performance of T300-AP composites to parity with that of T1000 composites.

T1000碳纤维在拉伸性能上远优于T300纤维，但块状T1000复合材料与稀疏分布的微/纳米芳纶纸浆（AP）纤维交织，其性能可以与块状T300复合材料相媲美。在本研究中，我们不仅关注了T1000和T300-AP复合材料的短梁抗剪强度，还关注了T1000和T300-AP复合材料在冲击前后的抗弯强度，因为这些性能是在弯曲主导载荷条件下结构性能的关键指标。当AP面密度分别为2、4和6 g/m2时，将AP-环氧树脂层间厚度增加在8 μm或以下，T300-AP复合材料的短束抗剪强度和抗弯强度分别提高了38%和55%，超过了未进行AP-界面增韧的普通T1000复合材料的性能。这些发现强调了界面设计和准z方向纤维桥接在cfrp中的重要性，表明薄至15 μm的碳纤维层之间的富树脂层可以通过ap -界面增韧转变为机械互锁的层界面，从而使T300-AP复合材料的结构性能与T1000复合材料相当。

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引用次数: 0

Multiscale-multiphysics modeling of moisture absorption-induced dielectric evolution in polymeric composites 聚合物复合材料吸湿诱导介电演化的多尺度多物理场模拟

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

Composites Science and Technology

Pub Date : 2026-02-08 Epub Date: 2025-11-04 DOI: 10.1016/j.compscitech.2025.111433

Partha Pratim Das , Vamsee Vadlamudi , Monjur Morshed Rabby , Ankur Jain , David Mollenhauer , Rassel Raihan

This study presents a multiscale-multiphysics computational framework for modeling complex moisture absorption mechanisms and their coupling with dielectric property evolution in polymer matrix composites (PMCs). First at the microscale level, orthotropic diffusion and absorption of water molecules, distinguishing between free and bound states respectively, are modeled using non-Fickian hindered diffusion model (HDM). The approach incorporates interphase effects and fiber-matrix heterogeneity utilizing finite element (FE) analysis. Emphasis is placed on increased diffusivity and absorption properties of interphase regions and their impact on the transport and reaction kinetics through representative volumetric elements (RVEs). A homogenization scheme subsequently translates these microscale constituent properties to macroscale behavior, enabling efficient FE implementation. A novel multiphysics coupling then integrates the absorption model with Maxwell's equations of electromagnetism in order to mechanistically model moisture-induced electrical property changes, and orientational polarization effects through dipole moment redistribution. The developed models are validated using experimental gravimetric data and broadband dielectric spectroscopy (BbDS) measurements performed on unidirectional glass fiber reinforced polymer (GFRP) composites subjected to hygrothermal aging. Results demonstrate that HDM successfully models moisture absorption mechanisms, e.g., diffusion, adsorption and desorption, while purely Fickian and irreversible binding models fail to match experimental trends. The coupled HDM-Maxwell model captures the correlation between experimentally observed moisture content and dielectric permittivity, where a ∼2.5 wt% of moisture content is found to result in ∼75% increase in dielectric permittivity. This coupled framework provides fundamental insights into the physics of moisture-electrical cross-property relationships in PMCs, while offering a validated analytical tool for modeling multifunctional composite performance in humid environments.

本文提出了一个多尺度、多物理场的计算框架，用于模拟聚合物基复合材料（PMCs）中复杂吸湿机制及其与介电性能演变的耦合。首先，在微观尺度上，利用非菲克阻碍扩散模型（HDM）对水分子的正交各向异性扩散和吸收进行了建模，分别区分了自由态和束缚态。该方法结合了相间效应和利用有限元分析的纤维-基体非均质性。重点放在增加的扩散率和吸收性质的相间区域及其影响的运输和反应动力学通过代表性的体积元素（RVEs）。均匀化方案随后将这些微观尺度的成分属性转换为宏观尺度的行为，从而实现高效的FE实现。然后，一种新的多物理场耦合将吸收模型与麦克斯韦电磁学方程相结合，以机械地模拟水分引起的电学性质变化，以及通过偶极矩重分配产生的定向极化效应。通过对单向玻璃纤维增强聚合物（GFRP）复合材料进行湿热老化的实验重力数据和宽带介电光谱（BbDS）测量，验证了所开发的模型。结果表明，HDM模型成功地模拟了扩散、吸附和解吸等吸湿机制，而纯粹的菲克模型和不可逆结合模型不符合实验趋势。耦合HDM-Maxwell模型捕获了实验观察到的水分含量和介电常数之间的相关性，其中发现~ 2.5 wt%的水分含量导致介电常数增加~ 75%。这种耦合框架为pmc中湿电交叉性能关系的物理特性提供了基本见解，同时为潮湿环境中多功能复合材料性能的建模提供了一种经过验证的分析工具。

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引用次数: 0

Multilayer design and multi-objective optimization of neutron shielding composites by means of MCNP simulation and machine learning 基于MCNP仿真和机器学习的中子屏蔽复合材料多层设计与多目标优化

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

Composites Science and Technology

Pub Date : 2026-02-08 Epub Date: 2025-11-15 DOI: 10.1016/j.compscitech.2025.111451

Benben Liu , Yizhuo Gu , Ruiqi Guo , Shaokai Wang , Min Li

To meet neutron shielding and lightweight requirements, fiber-reinforced polymer matrix composites offer significant advantages as multifunctional materials with both structural and shielding capabilities. Owing to their inherent multicomponent and multilayered configurations, selecting suitable reinforcements and optimizing multilayer structure remains challenging. This study addresses the design and multi-objective optimization of multilayer composite shielding structures for neutron radiation protection. Monte Carlo N-Particle (MCNP) simulation method is adopted to predict radiation shielding property of various composites. A homogeneous model is first employed to examine the effects of typical shielding fillers (B₄C and WO₃) on the effective neutron dose in an epoxy resin matrix across the full neutron energy spectrum. Subsequently, an idealized layered structure model is used to clarify material composition strategies and multi-layer design principles for epoxy resin matrix composite. The results show that for fast neutron protection, a bilayer configuration with a high-Z material as the front layer and a hydrogen-rich matrix as the rear layer is optimal. For slow neutron protection, multilayer configurations demonstrate significant advantages: a 128-layer structure can reduce the effective dose of slow neutrons by up to 30 % compared with a bilayer structure. Furthermore, a multi-objective optimization strategy is proposed for multilayer structures by integrating MCNP simulations with machine learning, which can optimize shielding efficiency, structural thickness, and overall mass. Among six regression algorithms, a three-layer neural network model is chosen, which achieves high prediction precision. This approach optimizes both the minimum-dose configuration at fixed thickness and the minimum-weight configuration at fixed dose, providing efficient design guidelines for multilayer composite shielding.

为了满足中子屏蔽和轻量化的要求，纤维增强聚合物基复合材料作为兼具结构和屏蔽能力的多功能材料具有显著的优势。由于其固有的多组分和多层结构，选择合适的增强材料和优化多层结构仍然是一个挑战。研究了用于中子辐射防护的多层复合屏蔽结构的设计与多目标优化。采用蒙特卡罗n粒子（MCNP）模拟方法对各种复合材料的辐射屏蔽性能进行了预测。本文首先采用均匀模型研究了典型屏蔽填料（B4C和WO3）在全中子能谱范围内对环氧树脂基体中有效中子剂量的影响。随后，利用理想分层结构模型阐明了环氧树脂基复合材料的材料组成策略和多层设计原则。结果表明，对于快中子防护，以高z材料为前层，富氢基质为后层的双层结构是最优的。对于慢中子防护，多层结构显示出显著的优势：与双层结构相比，128层结构可以减少多达30%的慢中子有效剂量。此外，将MCNP仿真与机器学习相结合，提出了多层结构的多目标优化策略，可以优化屏蔽效率、结构厚度和总质量。在六种回归算法中，选择了三层神经网络模型，实现了较高的预测精度。该方法优化了固定厚度下的最小剂量配置和固定剂量下的最小重量配置，为多层复合屏蔽提供了有效的设计指导。

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引用次数: 0

Designed core@double-shell KTN@Ag@cPS nanoparticles for regulation of dielectric properties and energy storage enhancement of PVDF-based composites 设计core@double-shell KTN@Ag@cPS纳米颗粒用于调节pvdf基复合材料的介电性能和增强储能

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

Composites Science and Technology

Pub Date : 2026-02-08 Epub Date: 2025-11-24 DOI: 10.1016/j.compscitech.2025.111461

Gaoru Chen , Chuanjie Lin , Wanbo Liu , Bo Chen , Xiaogan Zheng , Shilei Wang , Haowei Lu , Xuan Wang

To address the trade-off among dielectric constant, dielectric loss, and breakdown strength in polymer-based composites and to achieve nanocomposite films with both high discharged energy density and high energy storage efficiency, core@double-shell structured KTN@Ag@cPS nanoparticles were designed and incorporated into a PVDF matrix. The KTN core imparts excellent frequency stability to the dielectric constant of nanocomposite films. The Ag shell can generates abundant interfacial polarization, thereby effectively enhancing the overall polarization intensity. The insulating cross-linked polystyrene (cPS) outer shell suppresses charge carriers migration, which reduces dielectric loss and improves breakdown strength. At a filler loading of 5 vol%, the KTN@Ag@cPS/PVDF nanocomposite film exhibits a high relative dielectric constant of 19.85 and a low loss tangent of 3.1 × 10⁻² at 100 Hz. Under an electric field of 250 kV/mm, the discharged energy density reaches 9.05 J/cm³. The overall performance surpasses that of both KTN/PVDF and KTN@Ag/PVDF nanocomposite films. This core@double-shell nanoparticle design provides an effective strategy for the development of composite films for high-energy-density capacitors.

为了解决聚合物基复合材料中介电常数、介电损耗和击穿强度之间的平衡问题，并实现具有高放电能量密度和高储能效率的纳米复合膜，我们设计了core@double-shell结构KTN@Ag@cPS纳米颗粒，并将其纳入PVDF基质中。KTN芯对纳米复合薄膜的介电常数具有良好的频率稳定性。Ag壳层可以产生丰富的界面极化，从而有效地提高了整体极化强度。绝缘性交联聚苯乙烯（cPS）外壳抑制载流子迁移，降低介电损耗，提高击穿强度。当填充量为5 vol%时，KTN@Ag@cPS/PVDF纳米复合膜在100 Hz时具有19.85的高相对介电常数和3.1 × 10−2的低损耗正切。在250kv /mm电场下，放电能量密度达到9.05 J/cm3。整体性能优于KTN/PVDF和KTN@Ag/PVDF纳米复合膜。这种core@double-shell纳米颗粒设计为高能量密度电容器复合薄膜的开发提供了一种有效的策略。

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引用次数: 0

Multi-scale mechanism insight of elastomer toughened thermoplastic composites 弹性体增韧热塑性复合材料的多尺度机理研究

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

Composites Science and Technology

Pub Date : 2026-02-08 Epub Date: 2025-11-05 DOI: 10.1016/j.compscitech.2025.111434

Zheng Li , Kaiyin Xiao , Tong Li , Bo Wang , Peng Hao , Zebei Mao , Kaifan Du

This study elucidates a multi-applicability mechanism of elastomer-toughened brittle thermoplastics polymers through experimental methods and multiscale analysis. Polyolefin elastomer (POE) and glycidyl methacrylate-modified POE (POE-GMA) were used to toughen thermoplastic polymers polyphenylene sulfide (PPS) and polybutylene terephthalate (PBT). It was found that small amounts of POE-GMA could enhance the fracture energy of PBT and PPS by 167 % and 415 %, while only sacrificing 5.3 %–11.6 % of strength or rigidity, and the lower the inherent toughness of the polymer, the better the toughening effect, whereas POE showed no significant effect. Molecular dynamics simulations indicate that the GMA groups enhance interactions between POE-GMA and polymers, promoting POE-GMA diffusion into the polymer matrix and improving dispersion. Further finite element modeling indicates that smaller and more dispersed elastomer particles can induce more microcracks, enhancing energy absorption and consequently increasing the fracture energy, thereby improving toughness. This multi-applicability mechanism provides crucial insights for designing polymer composites that balance toughness and rigidity.

本研究通过实验方法和多尺度分析，阐明了弹性体增韧脆性热塑性聚合物的多适用机理。采用聚烯烃弹性体（POE）和甲基丙烯酸缩水甘油酯改性POE （POE- gma）对热塑性聚合物聚苯硫醚（PPS）和聚对苯二甲酸丁二酯（PBT）进行增韧。结果表明，少量POE- gma可使PBT和PPS的断裂能分别提高167%和415%，而强度或刚度仅损失5.3% - 11.6%，聚合物的固有韧性越低，增韧效果越好，POE的增韧效果不显著。分子动力学模拟表明，GMA基团增强了POE-GMA与聚合物之间的相互作用，促进了POE-GMA向聚合物基体的扩散，改善了聚合物的分散性。进一步的有限元模拟表明，弹性体颗粒越小、越分散，产生的微裂纹越多，增强了能量吸收，从而提高了断裂能，从而提高了韧性。这种多用途机制为设计平衡韧性和刚性的聚合物复合材料提供了重要的见解。

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引用次数: 0

A strain-adaptive hierarchical network enabling durable and highly sensitive conductive yarns for health monitoring 一种应变自适应分层网络，使耐用和高灵敏度的导电纱线用于健康监测

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

Composites Science and Technology

Pub Date : 2026-02-08 Epub Date: 2025-11-20 DOI: 10.1016/j.compscitech.2025.111457

Jiajia He, Xinru Xian, Ying Chen, Shengnan Min, Chenxi Lu

The development of high-performance elastic conductive yarns is often constrained by a formidable challenge: the inherent trade-off between high sensitivity and a wide sensing range, rooted in the poor adhesion and catastrophic fracture of conductive coatings upon stretching. Herein, we report a novel subsurface engineering strategy facilitated by an in-situ constructed FeOOH nanoscaffold on polyurethane (PU) yarns, which, combined with a pre-stretching design, effectively guides the distribution of polypyrrole (PPy) during polymerization. The process parameters were optimized via an orthogonal experimental design, which successfully constructs a strain-adaptive hierarchical conductive network characterized by surface microcracks, interfacial folded structures, and an internal PPy-permeated layer. The optimized conductive yarn exhibits an exceptional combination of an ultra-high gauge factor (3.71 × 10⁶) and a wide sensing range (up to 310 % strain). Mechanistic investigations reveal that the electrical response adapts to strain through a smart transition of the dominant conductive pathway: from surface crack propagation at low strains (ensuring high sensitivity) to the continuous internal network at large strains (guaranteeing broad range and durability). The FeOOH scaffold is proven crucial for enhancing the coating's uniformity and firmness. Finally, we demonstrate the practical utility of our sensor in monitoring diverse human motions and subtle physiological signals, showcasing its potential as a high-performance platform for wearable health monitoring.

高性能弹性导电纱的开发经常受到一个巨大挑战的制约：高灵敏度和宽传感范围之间的内在权衡，其根源在于导电涂层在拉伸时粘附性差和灾难性断裂。在此，我们报告了一种新的地下工程策略，即在聚氨酯（PU）纱线上原位构建FeOOH纳米支架，结合预拉伸设计，有效地指导聚合过程中聚吡啶（PPy）的分布。通过正交实验设计对工艺参数进行优化，成功构建了以表面微裂纹、界面折叠结构和内部渗透层为特征的应变自适应分层导电网络。优化后的导电纱具有超高的测量系数（3.71 × 106）和宽传感范围（高达310%的应变）的特殊组合。力学研究表明，电响应通过主要导电途径的智能过渡来适应应变：从低应变下的表面裂纹扩展（确保高灵敏度）到大应变下的连续内部网络（保证宽范围和耐用性）。事实证明，FeOOH支架对于提高涂层的均匀性和坚固性至关重要。最后，我们展示了我们的传感器在监测各种人体运动和微妙生理信号方面的实际效用，展示了它作为可穿戴健康监测高性能平台的潜力。

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引用次数: 0

Experimental evaluation of residual microstresses in CFRP composites using nanoindentation and FIB cross-sectioning 基于纳米压痕和FIB截面的CFRP复合材料残余微应力实验评估

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

Composites Science and Technology

Pub Date : 2026-02-08 Epub Date: 2025-11-10 DOI: 10.1016/j.compscitech.2025.111447

Sarvenaz Ghaffari, Andrew Makeev

Residual microstress is one of the major concerns in polymer-matrix composites. It may arise from mismatch in the physical and mechanical properties of the constituents, leading to premature material failure and damage in structural components. Therefore, it is important to understand and account for such stresses in design and manufacturing of advanced composites. This study presents a combined experimental approach to quantify residual microstresses in the matrix of carbon fiber-reinforced polymer (CFRP) composites. Residual stresses are released by fiber push-out, resulting in matrix deformation. Matrix deformation along the fiber direction, as well as in the fiber cross-section plane, is measured to estimate the residual microstresses. Deformation in the fiber direction is characterized using two complementary techniques: (1) nanoindentation to measure out-of-plane displacement, and (2) focused ion beam (FIB) cross-sectioning to visualize resin shrinkage associated with stress relaxation. Both methods reveal a cave-in effect at the resin pocket surfaces, confirming tensile residual stress in the matrix. In-plane deformation is evaluated by measuring the change in the cross-sectional diameter of the matrix hole before and after fiber push-out. An analytical solution has been devised to convert the measured strains into stresses near fibers, addressing the significance of residual microstresses. Results for a unidirectional CFRP tape material system, suitable for aircraft primary structures, show high tensile residual stress values in the matrix near the fiber surface. Such residual stresses, accelerating the onset of matrix cracking, can be detrimental to structural integrity.

残余微应力是聚合物基复合材料研究的主要问题之一。它可能是由成分的物理和机械性能不匹配引起的，导致结构部件的材料过早失效和损坏。因此，在先进复合材料的设计和制造中，理解和考虑这种应力是很重要的。本研究提出了一种结合实验的方法来量化碳纤维增强聚合物（CFRP）复合材料基体中的残余微应力。残余应力通过纤维外推释放，导致基体变形。测量基体沿纤维方向和纤维截面的变形，以估计残余微应力。纤维方向上的变形使用两种互补技术来表征：(1)纳米压痕测量面外位移，(2)聚焦离子束（FIB）横截面观察与应力松弛相关的树脂收缩。两种方法都揭示了树脂袋表面的塌陷效应，证实了基体中的拉伸残余应力。通过测量纤维推出前后基体孔截面直径的变化来评估面内变形。设计了一种解析解，将测量的应变转换为纤维附近的应力，解决了残余微应力的重要性。结果表明，适用于飞机初级结构的单向CFRP带材料体系在靠近纤维表面的基体中显示出较高的拉伸残余应力值。这样的残余应力，加速了基体开裂的发生，对结构的完整性是有害的。

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引用次数: 0

Fluorine-containing meta-aramid modified low dielectric, hydrophobic aramid paper 含氟间位芳纶改性低介电疏水性芳纶纸

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

Composites Science and Technology

Pub Date : 2026-02-08 Epub Date: 2025-11-07 DOI: 10.1016/j.compscitech.2025.111444

Yifan Hu, Qiuyue Zuo, Haowei Li, Lan Lei, Chunjie Xie, Hui Li

Aramid paper with excellent mechanical properties, heat resistance and electrical insulation properties has a wide range of applications. However, traditional aramid paper still has problems such as easy moisture absorption and high dielectric constant, which to some extent limit its application in new fields, such as 5G/6G communication and wearable flexible devices. In this work, fluorine-containing meta-aramid solution was prepared. Different concentrations of fluorine-containing meta-aramid solutions were used to coat commercial aramid paper by scraping. Finally, a series of aramid papers modified by fluorine-containing aramid solution were obtained through drying treatment. The basic parameters and performances of commercial aramid paper and modified composite paper, including the appearance, microstructure, mechanical properties, dielectric properties and moisture absorption properties, were tested and characterized in detail. The results show that, the tensile strength of the composite paper can reach more than 80 MPa, far exceeding that of the unmodified commercial aramid paper. Furthermore, the composite paper exhibited low dielectric constant (1.90) and dielectric loss (0.01). The surface hydrophobicity and moisture resistance of composite aramid paper have been significantly improved when compared with the commercial aramid paper. Based on the method proposed in this work, the composite aramid paper has excellent characteristics such as low dielectric constant, hydrophobicity and low moisture absorption, and is expected to meet the strict requirements for aramid paper materials in multiple fields in the future. Furthermore, the technological process of this paper is relatively simple and is expected to be applied in industrial production in the future.

芳纶纸具有优异的机械性能、耐热性和电绝缘性能，具有广泛的应用前景。但传统芳纶纸仍存在易吸湿、介电常数高等问题，在一定程度上限制了其在5G/6G通信、可穿戴柔性设备等新领域的应用。本文制备了含氟间位芳纶溶液。采用不同浓度的含氟间位芳纶溶液对商品芳纶纸进行刮涂。最后，对含氟芳纶溶液进行干燥处理，得到了一系列芳纶纸。对商用芳纶纸和改性复合纸的外观、微观结构、力学性能、介电性能和吸湿性能等基本参数和性能进行了测试和表征。结果表明，复合纸的抗拉强度可达80 MPa以上，远远超过未改性的商用芳纶纸。此外，复合纸具有较低的介电常数（1.90）和介电损耗（0.01）。与普通芳纶纸相比，复合芳纶纸的表面疏水性和耐湿性有了明显提高。基于本文提出的方法，复合芳纶纸具有低介电常数、疏水性、低吸湿性等优异特性，有望满足未来多个领域对芳纶纸材料的严格要求。此外，本文的工艺流程相对简单，有望在未来的工业生产中得到应用。

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引用次数: 0