Composites Science and Technology最新文献_第7页

Bioinspired thermoresponsive hydrogel with stiffness switching for on-demand sensing-protection bimodal integration 生物启发热响应水凝胶与刚度切换按需传感保护双峰集成

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

Composites Science and Technology

Pub Date : 2025-11-25 DOI: 10.1016/j.compscitech.2025.111459

Jiahao Liu, Canhui Lu, Rui Xiong

Conventional hydrogels face fundamental challenges in reconciling sensing adaptability with on-demand protection for emerging intelligent wearables. Inspired by the stress-induced hardening mechanism of sea cucumbers, we have developed an innovative thermoresponsive composite hydrogel that overcomes these limitations through carefully engineered multicomponent integration. The outstanding performance arises from dynamically crosslinked poly(acrylic acid)-amorphous calcium carbonate coordination networks, which serve as thermally responsive phase-transition elements. Additionally, hierarchically structured cellulose nanofiber/carbon nanotube (CNT/CNF) percolation networks provide both mechanical reinforcement and electrical conductivity, creating synergistic interactions between these components. The resulting hydrogel demonstrates exceptional thermoresponsive behavior with a remarkable 826-fold increase in compressive modulus. Beyond this dramatic mechanical transition, the material integrates multiple advanced functionalities, including autonomous fast self-healing within 1s, moldable shaping, good electrical conductivity, and extreme stretchability beyond 1000 % strain. This unique combination of properties facilitates a novel dual-mode operation, where the material serves simultaneously as a highly sensitive strain sensor for continuous physiological monitoring and as an adaptive protective system capable of rapid electrothermal-triggered stiffening in less than 3 s. When implemented in protective device architectures, the system demonstrates a 45.58-fold increase in bending strength upon activation, from 0.19 MPa to 8.66 MPa, along with exceptional impact energy absorption of 30.87 kJ m⁻². These capabilities represent a significant breakthrough in adaptive material design, establishing a new paradigm for smart systems that seamlessly integrate real-time sensing with active protection.

传统的水凝胶在协调新兴智能可穿戴设备的传感适应性和按需保护方面面临着根本性的挑战。受海参应力诱导硬化机制的启发，我们开发了一种创新的热响应复合水凝胶，通过精心设计的多组分集成克服了这些限制。动态交联聚丙烯酸-无定形碳酸钙配位网络作为热响应相变元件，具有优异的性能。此外，分层结构的纤维素纳米纤维/碳纳米管（CNT/CNF）渗透网络提供机械增强和导电性，在这些成分之间产生协同作用。由此产生的水凝胶表现出特殊的热响应行为，压缩模量显著增加826倍。除了这种戏剧性的机械转变之外，这种材料还集成了多种先进的功能，包括在15秒内自主快速自愈、可成型、良好的导电性和超过1000%应变的极限拉伸性。这种独特的特性组合促进了一种新的双模式操作，该材料同时作为高灵敏度应变传感器进行连续生理监测，并作为一种自适应保护系统，能够在不到3秒的时间内快速电热触发硬化。当应用于保护装置架构时，该系统在激活后的抗弯强度增加了45.58倍，从0.19 MPa增加到8.66 MPa，同时具有30.87 kJ m−2的特殊冲击能量吸收。这些功能代表了自适应材料设计的重大突破，为无缝集成实时传感和主动保护的智能系统建立了新的范例。

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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 : 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

Microscopic mechanism of interfacial effects on mechanical properties of polymer nanocomposites 界面效应对聚合物纳米复合材料力学性能影响的微观机理

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

Composites Science and Technology

Pub Date : 2025-11-21 DOI: 10.1016/j.compscitech.2025.111458

Xiaobin Liang , Toru Kobayashi , Tatsuya Endo , Makiko Ito , Ken Nakajima

Interfaces play a crucial role in the mechanical properties and deformation behavior of polymer nanocomposites (PNCs). In this study, we successfully characterized the deformation behavior and stress distribution of the interface and polymer matrix at the nanoscale using the nanomechanical technique of atomic force microscopy (AFM), revealing the microscopic mechanism of the interface effects on the mechanical properties of PNCs. By comparing the interfaces of different fillers and styrene-butadiene rubber (SBR), we found that silane coupling agent-treated silica (SiO₂) could greatly increase the interface thickness and strength. This enhancement was not limited to the interface itself but also restricted the movement of molecular chains nearby, thereby increasing the modulus of the surrounding matrix. When the material was deformed, the high-strength interface could bear a large amount of stress, while the stresses in composites with low interfacial strength were mainly borne by the polymer matrix. This microscopic stress visualization technique enabled a deeper understanding of the correlation between the micromechanical behavior and macroscopic mechanical properties of the interface and matrix. In addition, through the quantitative analysis of the stress distribution of each phase, we proposed a multiphase composite model to describe the deformation behavior of filled rubber. We used the parallel model and the series model to calculate the composite stress of different types of filler PNCs, further reveals the importance of the interface for the mechanical properties of PNCs. Our results provided new insights for guiding the design and development of PNCs and for the study of composite interfaces.

界面对聚合物纳米复合材料的力学性能和变形行为起着至关重要的作用。在本研究中，我们利用原子力显微镜（AFM）纳米力学技术成功表征了界面和聚合物基体在纳米尺度上的变形行为和应力分布，揭示了界面效应对pnc力学性能的微观机制。通过对比不同填料与SBR的界面，发现硅烷偶联剂处理的二氧化硅（SiO2）可以显著提高界面厚度和强度。这种增强不仅限于界面本身，而且还限制了附近分子链的运动，从而增加了周围基质的模量。当材料发生变形时，高强度界面可以承受大量的应力，而低强度界面的复合材料中的应力主要由聚合物基体承担。这种微观应力可视化技术使人们能够更深入地了解界面和基体的微观力学行为与宏观力学性能之间的关系。此外，通过定量分析各相的应力分布，提出了描述填充橡胶变形行为的多相复合模型。采用并联模型和串联模型计算了不同类型填料pnc的复合应力，进一步揭示了界面对pnc力学性能的重要性。研究结果为指导pnc的设计和开发以及复合界面的研究提供了新的见解。

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引用次数: 0

Unraveling the interfacial hydrogen bond network mechanism in carbon fiber/polyamide composites: A cross-scale investigation of carbon fiber with different roughness for interface optimization 揭示碳纤维/聚酰胺复合材料界面氢键网络机制：不同粗糙度碳纤维界面优化的跨尺度研究

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

Composites Science and Technology

Pub Date : 2025-11-20 DOI: 10.1016/j.compscitech.2025.111453

Rui Zhang , Jieying Zhi , Lijuan Cao , Liye Yuan , Xiaodong Wen , Xingchen Liu , Kuan Lu , Xiaoxuan Lyu , Yu Yang

The interfacial properties of carbon fiber-reinforced thermoplastics are governed by carbon fiber surface characteristics. While the interfacial mechanisms in thermoset composites have been extensively investigated, their thermoplastic counterparts have received comparatively less attention. This research implements a cross-scale methodology integrating macroscopic experiments and molecular dynamics (MD) simulations to elucidate interfacial mechanisms between polyamide 6 (PA6) and two types of carbon fibers with distinct surface states: dry-jet wet-spun carbon fiber (DSCF) and wet-spun carbon fiber (WSCF). Experimental results revealed a notably 55.74 % higher interfacial shear strength (IFSS) in DSCF/PA6 composites (63.20 MPa) compared with WSCF/PA6 systems (40.58 MPa). Through comprehensive microscopic analysis and computational modeling, we found that the enhanced interfacial performance of DSCF stems from its higher concentration of oxygen-containing functional groups, which promote the formation of a more robust hydrogen bond network with PA6 molecules. Building upon this fundamental understanding, we proposed a mesoscale optimization strategy focused on hydrogen bond network regulation. Implementing controlled cooling during composite molding enhanced PA6 crystallinity, leading to a 26.74 % increase in the IFSS of DSCF/PA6 to 80.10 MPa. This work not only clarifies the critical role of hydrogen bonding in interfacial reinforcement but also presents a practical multiscale design framework for DSCF/PA6 composites. The findings offer valuable insights for carbon fiber selection and interface engineering, contributing significantly to the development of advanced carbon fiber-reinforced thermoplastic materials.

碳纤维增强热塑性塑料的界面性能受碳纤维表面特性的影响。虽然热固性复合材料的界面机制已经得到了广泛的研究，但热塑性复合材料的界面机制却相对较少受到关注。本研究采用宏观实验和分子动力学（MD）模拟相结合的跨尺度方法，阐明了聚酰胺6 （PA6）与两种不同表面状态的碳纤维(干喷湿纺碳纤维（DSCF）和湿纺碳纤维（WSCF）之间的界面机理。实验结果表明，DSCF/PA6复合材料的界面抗剪强度（IFSS）为63.20 MPa，比WSCF/PA6复合材料的40.58 MPa高55.74%。通过全面的微观分析和计算建模，我们发现DSCF界面性能的增强源于其含有更高浓度的含氧官能团，这促进了与PA6分子形成更牢固的氢键网络。基于这一基本认识，我们提出了一种以氢键网络调节为重点的中尺度优化策略。在复合成型过程中实施控制冷却提高了PA6的结晶度，导致DSCF/PA6的IFSS提高26.74%，达到80.10 MPa。这项工作不仅阐明了氢键在界面增强中的关键作用，而且为DSCF/PA6复合材料提供了一个实用的多尺度设计框架。这些发现为碳纤维的选择和界面工程提供了有价值的见解，对先进碳纤维增强热塑性材料的发展有重要贡献。

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引用次数: 0

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 : 2025-11-20 DOI: 10.1016/j.compscitech.2025.111448

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

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 : 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

Designing high-performance ultrathin composites with spread carbon fiber and carbon dots modified epoxy resin 设计高性能碳纤维与碳点改性环氧树脂的超薄复合材料

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

Composites Science and Technology

Pub Date : 2025-11-20 DOI: 10.1016/j.compscitech.2025.111456

Cheng Zhang , Jiling Zhao , Yang Chen , Huawei Zou

Combining spread carbon fiber (CF₂₄) with an epoxy matrix modified by carbon dots (CDs), this study develops ultrathin composites exhibiting superior mechanical, thermal, electrical, and electromagnetic interference (EMI) shielding performance. The fiber spreading process enhances fiber alignment, contributing to the high-performance characteristics of the composites. The incorporated CDs demonstrate excellent compatibility and dispersion within the epoxy resin, and participate in the curing reaction, leading to a notable improvement in matrix properties. Optimal performance is achieved at a CDs loading of 0.15 wt%, with the resulting composite showing increases of 54.79 % in transverse fiber bundle strength, 37.02 % in interlaminar shear strength, and 24.83 % in compressive strength relative to the baseline CF₂₄ composite. Moreover, the 0.15 wt% CDs composite exhibits the highest thermal diffusivity, the lowest electrical resistivity, and an exceptional EMI shielding effectiveness of 41.84 dB. This work broadens the application scope of CDs in epoxy resin systems and demonstrates a viable strategy for fabricating functionalized ultrathin carbon fiber reinforced polymer composites with integrated multifunctional properties.

本研究将碳纤维（CF24）与碳点（CDs）改性的环氧树脂基体相结合，开发出具有优异机械、热、电和电磁干扰（EMI）屏蔽性能的超薄复合材料。纤维铺展过程增强了纤维的排列，有助于提高复合材料的高性能。加入的CDs在环氧树脂中表现出良好的相容性和分散性，并参与固化反应，导致基体性能显著改善。当cd载荷为0.15 wt%时，复合材料的性能达到最佳，与基准CF24复合材料相比，复合材料的横向纤维束强度提高了54.79%，层间剪切强度提高了37.02%，抗压强度提高了24.83%。此外，0.15 wt%的CDs复合材料具有最高的热扩散率，最低的电阻率，以及41.84 dB的卓越EMI屏蔽效率。本研究拓宽了CDs在环氧树脂体系中的应用范围，为制备具有综合多功能性能的功能化超薄碳纤维增强聚合物复合材料提供了可行的策略。

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引用次数: 0

Carbon nanotube-graphite felt reinforced composite phase change materials for synergistic energy conversion and thermal management 碳纳米管-石墨毡增强复合相变材料的协同能量转换和热管理

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

Composites Science and Technology

Pub Date : 2025-11-19 DOI: 10.1016/j.compscitech.2025.111454

Xuebing Dai , Liping Zeng , Qianyao Zhang , Su Huan , Xiaohua Li

Amid escalating global energy demands and the imperative transition toward sustainable energy systems, phase change materials (PCM) have emerged as pivotal enablers for enhancing energy efficiency. However, organic PCM face leakage susceptibility and inadequate thermal/electrical conductivity, which have critically constrained their practical deployment in renewable energy applications. This study innovatively engineered a carbon nanotube-reinforced graphite felt composite PCM (CNT/GF-MPP) through a rational structural hybridization strategy. By integrating a three-dimensional graphite felt scaffold with carbon nanotubes to adsorb ternary co-crystals (MPP), the composite achieved synergistic enhancement of capillary forces and crystallization kinetics, resulting in a remarkable loading factor of 91.42 % while suppressing leakage to 4.8 % at 70 °C. The architecture demonstrated exceptional thermal conductivity with 1.15 W/(m·K), 259 % improvement over pristine MPP and maintained a phase change enthalpy of 182.3 J/g at optimal CNT loading (0.1 %wt). It has dual-mode energy conversion capabilities: a photothermal efficiency of 90.0 % under 1-sun irradiation and an electrothermal conversion efficiency of 71.9 % at 2.5 V. The composite exhibited maintaining 98.8 % enthalpy retention over 100 thermal cycles. Practical verification of thermal management demonstrates precise regulation of body temperature (26.5–26.8 °C) during physical activity. This research provides technical support for multifunctional thermal management.

随着全球能源需求的不断增长和向可持续能源系统的迫切转变，相变材料（PCM）已成为提高能源效率的关键推动者。然而，有机PCM面临泄漏敏感性和导热/导电性不足，这严重限制了其在可再生能源应用中的实际部署。本研究通过合理的结构杂交策略，创新地设计了碳纳米管增强石墨毡复合材料PCM （CNT/GF-MPP）。通过将三维石墨毡支架与碳纳米管集成以吸附三元共晶（MPP），复合材料实现了毛细力和结晶动力学的协同增强，导致加载系数达到91.42%，同时在70°C时将泄漏抑制到4.8%。该结构的导热系数为1.15 W/(m·K)，比原始MPP提高了259%，在最佳碳纳米管负载（0.1% wt）下保持了182.3 J/g的相变焓。它具有双模能量转换能力：在1太阳照射下光热效率为90.0%，在2.5 V下电热转换效率为71.9%。该复合材料在100次热循环中保持了98.8%的焓保持。热管理的实际验证表明，在身体活动期间，体温（26.5-26.8°C）的精确调节。本研究为多功能热管理提供了技术支持。

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引用次数: 0

Achieving high temperature energy storage performance in PVDF through synergizing cross-linking and BNNs doping strategies 通过协同交联和bnn掺杂策略实现PVDF的高温储能性能

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

Composites Science and Technology

Pub Date : 2025-11-17 DOI: 10.1016/j.compscitech.2025.111455

Qiuying Zhao , Jiachen Shi , Lu Yang , Ming Zhang , Hongli Ji , Jinhao Qiu

The growing demand for electrostatic capacitors in extreme conditions highlights the urgent need for polymer dielectric films with high breakdown strength (E_b), high discharge energy density (U_e), and outstanding high-temperature stability. Herein, a high-temperature stable capacitive composite film based on poly(vinylidene fluoride-co-chlorotrifluoroethylene) (P(VDF-CTFE)) is proposed by synergizing cross-linking and doping strategies. Specifically, P(VDF-CTFE) is engineered to form a cross-linking network and subsequently doped with surface-modified BNNs (BNNs-OH). By harnessing the synergistic effect between cross-linking and BNNs-OH doping, one can effectively restrict molecular mobility, disrupt the growth of crystalline domains, and inhibit the propagation of electrical trees and defects. This dual modification not only enhances the structural integrity of the polymer matrix but also improves its breakdown strength, high-temperature stability, and energy storage capabilities. The resultant composite film delivers a high discharge energy density up to 14.1 Jcm⁻³ at 25 °C and 13.59 Jcm⁻³ at 150 °C, validating its distinguished temperature stability over a wide temperature range. This study presents a facile strategy to develop advanced polymer dielectric films for harsh operating environments where both performance and durability are crucial.

在极端条件下对静电电容器的需求日益增长，迫切需要具有高击穿强度（Eb）、高放电能量密度（Ue）和出色的高温稳定性的聚合物介电膜。本文采用交联和掺杂的协同策略，制备了一种基于聚偏氟乙烯-共氯三氟乙烯（P(VDF-CTFE)）的高温稳定电容性复合薄膜。具体来说，P（VDF-CTFE）被设计成形成交联网络，随后掺杂表面修饰的BNNs （BNNs- oh）。通过利用交联和BNNs-OH掺杂之间的协同效应，可以有效地限制分子迁移率，破坏晶体结构域的生长，抑制电树和缺陷的传播。这种双重改性不仅增强了聚合物基体的结构完整性，而且提高了其击穿强度、高温稳定性和储能能力。合成的复合薄膜在25°C和150°C下的放电能量密度分别高达14.1 Jcm−3和13.59 Jcm−3，证明了其在宽温度范围内的优异温度稳定性。这项研究提出了一种简单的策略来开发先进的聚合物介电薄膜，用于性能和耐用性都至关重要的恶劣操作环境。

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引用次数: 0

Hydrothermal aging induced interfacial degradation behavior of 3D printed continuous glass fiber composites 水热老化诱导3D打印连续玻璃纤维复合材料界面降解行为

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

Composites Science and Technology

Pub Date : 2025-11-17 DOI: 10.1016/j.compscitech.2025.111452

Kui Wang , Gejin Zhao , Ying Chen , Bing Yang , Yong Peng , Yanni Rao

This study investigated the interfacial degradation behavior of continuous glass fiber-reinforced composites fabricated using the fused deposition manufacturing technique under accelerated hydrothermal aging. The accelerated aging was conducted at 60 °C and 100 % relative humidity for up to 30 days. The bonding strength of three interlayer structures, including the polyamide 6 (PA6) matrix layer/PA6 matrix layer (M/M), PA6 matrix layer/continuous glass fiber layer (M/G), and continuous glass fiber layer/continuous glass fiber layer (G/G), was evaluated through roller peeling tests. The results indicated that the M/M interlayer specimen (Inter-M/M) exhibited the highest peeling strength, while the G/G interlayer specimen (Inter-G/G) showed the lowest peeling strength for the as-prepared specimens. The primary failure mode in Inter-M/M was characterized by plastic deformation and ductile fracture of the matrix, while the main failure mode in Inter-G/G involved the debonding of continuous glass fibers from the matrix. After aging, the bonding strength of all three interlayer structures declined to varying degrees, with the M/G interlayer specimen (Inter-M/G) showing the greatest reduction. The effects of hydrothermal aging on interfacial degradation were primarily characterized by a change in the matrix failure mode, reduced crack initiation in adjacent layers, and weakened bonding between fibers and matrix.

研究了熔融沉积法制备的连续玻璃纤维增强复合材料在加速水热老化条件下的界面降解行为。在60°C和100%相对湿度下进行加速老化，最长可达30天。通过滚剥试验，对聚酰胺6 （PA6）基层/PA6基层（M/M）、PA6基层/连续玻璃纤维层（M/G）、连续玻璃纤维层/连续玻璃纤维层（G/G）三种层间结构的结合强度进行了评价。结果表明：M/M夹层试样（Inter-M/M）的剥离强度最高，G/G夹层试样（Inter-G/G）的剥离强度最低；Inter-M/M的主要破坏模式是基体的塑性变形和韧性断裂，而Inter-G/G的主要破坏模式是连续玻璃纤维与基体的剥离。时效后，3种夹层组织的结合强度均有不同程度的下降，其中M/G夹层试样（Inter-M/G）的结合强度下降幅度最大。热液时效对界面降解的影响主要表现为基体破坏模式的改变、相邻层裂纹萌生的减少以及纤维与基体结合的减弱。

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引用次数: 0