Composites Science and Technology最新文献_第10页

Multifunctional gradient-engineered ultrathin flexible composite films for electromagnetic interference shielding, energy storage, and Joule heating 用于电磁干扰屏蔽、储能和焦耳加热的多功能梯度工程超薄柔性复合薄膜

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

Composites Science and Technology

Pub Date : 2026-02-08 Epub Date: 2025-11-28 DOI: 10.1016/j.compscitech.2025.111466

Zhuo Cai , Xinyu Ji , Jiepeng Zhao , Dandan Li , Yifei Ma , Mei Wang , Zhaomin Tong , Xuyuan Chen

Driven by the widespread adoption of smart and portable electronic devices, ultrathin films with energy storage capabilities are required to simultaneously provide electromagnetic interference (EMI) shielding and self-heating functionalities to operate reliably in demanding environments. Given the similarities in material selection and structural design between EMI shielding materials and supercapacitor electrodes, constructing architectures that integrate efficient conductive networks and ion transport pathways is critical for developing such multifunctional materials. Gradient conductive architectures using high–aspect ratio materials to bridge layers, with layer–performance correlation analysis, offer a promising route to overcome current limitations. Here, a gradient structure was achieved by designing a multilayer ultrathin CNF-based (carbon nanofiber) film. The resulting film presents a high EMI shielding effectiveness (SE/t of 8000 dB mm⁻¹ with a thickness of 5 μm), primarily due to the synergistic sequential reflection–absorption cycles shielding mechanism and enhanced polarization losses induced by abundant interfacial interactions. The CNT/CNF network inhibits the restacking of MXene, while CNT can form bridging channels between the upper and lower conductive layers, facilitating vertical electron transport across different conductive layers. The resulting film demonstrates excellent energy storage performance in symmetric supercapacitors, achieving a specific capacitance of 92.1 F/g. The film exhibits robust mechanical performance, with a tensile strength of 198 MPa and a strain of 5.8 % and outstanding Joule heating performance with a low operating voltage (reaching 92.7 °C at 4 V). The demonstrated properties position the composite film as a compelling material for integration into advanced wearable and flexible electronic platforms.

由于智能和便携式电子设备的广泛采用，需要具有能量存储能力的超薄薄膜同时提供电磁干扰（EMI）屏蔽和自加热功能，以便在苛刻的环境中可靠地运行。考虑到电磁干扰屏蔽材料和超级电容器电极在材料选择和结构设计上的相似性，构建集成高效导电网络和离子传输途径的架构对于开发这种多功能材料至关重要。利用高纵横比材料架桥的梯度导电结构，以及层间性能的相关性分析，为克服当前的限制提供了一条有希望的途径。在这里，通过设计多层超薄cnf基（碳纳米纤维）薄膜来实现梯度结构。所制备的薄膜具有较高的电磁干扰屏蔽效果（SE/t为8000 dB mm−1，厚度为5 μm），主要是由于协同顺序反射-吸收周期屏蔽机制和丰富的界面相互作用引起的极化损失增强。CNT/CNF网络抑制了MXene的再堆积，而CNT可以在上下导电层之间形成桥接通道，促进电子在不同导电层之间的垂直传递。所得薄膜在对称超级电容器中表现出优异的储能性能，比电容达到92.1 F/g。该薄膜具有良好的力学性能，抗拉强度为198 MPa，应变为5.8%，在低工作电压（4 V时达到92.7°C）下具有出色的焦耳加热性能。所展示的性能使复合薄膜成为集成到先进可穿戴和柔性电子平台的引人注目的材料。

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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 : 2026-02-08 Epub 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

Enhancing bolted joint performance of woven composite laminates using 3D printed interlayers with tailored fibre architectures 使用定制纤维结构的3D打印夹层增强编织复合材料层压板的螺栓连接性能

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

Composites Science and Technology

Pub Date : 2026-02-08 Epub Date: 2025-11-01 DOI: 10.1016/j.compscitech.2025.111430

Aonan Li, Jiang Wu, Bin Yang, Yubo Shao, Shuai Wang, Dongmin Yang

This study investigates the effect of incorporating 3D printed interlayers containing continuous carbon fibres into plain weave CFRP laminates. The impact on stress distribution and the mechanical performance of bolted joints is systematically investigated. Three interlayer design strategies were developed to tailor the fibre distribution within the interlayers using filament-based 3D printing, and the resulting tailored-interlayer/woven laminates were assessed through double-shear testing to characterise the fibre load-transfer mechanisms. A filament-level multiscale finite element model was developed to capture the progressive damage evolution of the laminates. The experimental and numerical results demonstrate that incorporating 3D-printed interlayers can substantially enhance joint performance. Relative to the woven laminate baseline, enhancements were achieved across all interlayer cases. Specifically, improvements of up to 86 % in stiffness, 95 % in initial peak strength, and 59 % in ultimate bearing strength were achieved across the evaluated cases. In addition, substantial enhancements in energy absorption capacity were observed, with the initial fracture energy increasing by as much as 496 %, and the ultimate fracture energy by up to 10 %, depending on the specific architectural conditions. Among the designs, fibre steering guided by failure planes yielded most suppression of damage propagation. Together with micro-CT scans of the final failure morphologies, the simulation results provided insight into the damage progression and showed good agreement with the overall mechanical response observed experimentally. This research highlights the effectiveness of stress-adapted fibre steering in laminates and demonstrates the potential of 3D printing as a tool for locally reinforcing CFRP joints.

本研究探讨了将含有连续碳纤维的3D打印夹层纳入平纹CFRP层压板的效果。系统地研究了螺栓连接对应力分布和力学性能的影响。研究人员利用基于长丝的3D打印技术开发了三种夹层设计策略，以定制夹层内的纤维分布，并通过双剪切测试评估了定制的夹层/编织层压板，以表征纤维负载传递机制。建立了一种细丝级多尺度有限元模型，以捕捉层合板的渐进损伤演化过程。实验和数值结果表明，加入3d打印夹层可以显著提高接头性能。相对于编织层压板基线，在所有层间情况下都实现了增强。具体来说，在评估的情况下，刚度提高了86%，初始峰值强度提高了95%，极限承载强度提高了59%。此外，根据具体的建筑条件，可以观察到能量吸收能力的显著增强，初始断裂能增加496%，最终断裂能增加10%。在这些设计中，以破坏面为导向的纤维转向对损伤传播的抑制效果最好。结合最终破坏形态的微ct扫描，模拟结果提供了对损伤进展的深入了解，并与实验观察到的整体力学响应表现出良好的一致性。这项研究强调了应力适应纤维转向在层压板中的有效性，并展示了3D打印作为局部增强CFRP接头工具的潜力。

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引用次数: 0

Direct electroplating of CFRP composite laminates assisted by laser surface modification 激光表面改性辅助CFRP复合材料层合板的直接电镀

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

Composites Science and Technology

Pub Date : 2026-02-08 Epub Date: 2025-11-06 DOI: 10.1016/j.compscitech.2025.111431

Jiashu Sheng , Kai Luo , Xiaochong Wang , Zhi Han , Quanzhou Yao , Lin Ye

Carbon fiber-reinforced polymer (CFRP) are widely used across various industries, including aerospace, automotive, and electronics, owing to their exceptional mechanical properties and superior strength-to-weight ratios. The present study endeavors to overcome the inherent electrical conductivity limitation of epoxy resin-based CFRPs by achieving direct electroplating onto the surface of CFRP laminates. This approach facilitates the development of multifunctional applications that necessitate high surface electrical or thermal conductivity. To this end, a laser ablation technique is introduced to remove the resin-rich layer on the CFRP surface. Subsequently, a conventional copper electroplating method is employed to deposit a robust and continuous coating onto the CFRP laminate surface. The impact of laser ablation parameters on both the CFRP laminate and the subsequent electroplating process is meticulously analyzed, utilizing scanning electron microscopy to assess morphology characteristics. The optimal copper coating demonstrates remarkable electrical conductivity, exhibiting an electrical resistance that is only one order of magnitude higher than that of pure copper film. Furthermore, out-of-plane thermal conductivity enhancements of

133.7 %

and

151.2 %

are observed at

30 °C

and

75 °C

, respectively, compared to the untreated CFRP laminate.

碳纤维增强聚合物（CFRP）由于其卓越的机械性能和卓越的强度重量比，被广泛应用于各个行业，包括航空航天，汽车和电子产品。本研究试图克服环氧树脂基CFRP固有的导电性限制，实现在CFRP层压板表面直接电镀。这种方法促进了需要高表面导电性或导热性的多功能应用的发展。为此，采用激光烧蚀技术去除CFRP表面的富树脂层。随后，采用传统的镀铜方法在CFRP层压板表面沉积坚固且连续的涂层。激光烧蚀参数对CFRP层压板和随后的电镀工艺的影响进行了细致的分析，利用扫描电子显微镜来评估形貌特征。最佳铜涂层表现出卓越的导电性，其电阻仅比纯铜膜高一个数量级。此外，在30°C和75°C时，与未经处理的CFRP层压板相比，面外导热系数分别提高了133.7%和151.2%。

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引用次数: 0

A full-field frequency domain analysis of experimental and numerical damping responses in flax fiber reinforced composites under hygroscopic cycling 吸湿循环作用下亚麻纤维增强复合材料阻尼响应的频域分析

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

Composites Science and Technology

Pub Date : 2026-02-08 Epub Date: 2025-11-28 DOI: 10.1016/j.compscitech.2025.111468

Songli Tan , Bo Wen , Zhen Zhang , Qian Li , Yan Li

Flax fiber reinforced composites (FFRCs) have gained increasing attention as sustainable composites in aerospace applications, where vibration damping performance under environmental exposure is critical. However, the hygroscopic effects on the damping behavior of FFRCs, particularly in low to mid-frequency ranges, remain insufficiently understood. In this study, a full-field frequency domain analysis was conducted to investigate the damping responses of FFRCs under hygroscopic cycling. Firstly, unidirectional (0°, 45°, 90°), orthotropic and symmetric angle-ply composites were subjected to hygroscopic cycling in an environmental chamber under controlled temperature and humidity conditions. Then, all composites under various hygroscopic cycles were examined to establish the relationship between the first five-order modal frequencies, hygroscopicity and damping ratios via non-contact 3D scanning laser Doppler vibrometer. Finally, a finite element model was developed by incorporating laminate theory and the complex eigenvalue method within user-defined material subroutines to predict frequency- and moisture-dependent damping responses in full-field frequency range. The findings indicated that the damping ratio increased while the frequency were reduced in the composites subjected to hygroscopic cycling, thereby modifying the frequency dependence of energy dissipation mechanisms. Redrying to equilibrium moisture content did not restore the initial damping properties. After hygroscopic cycles, the resonance response amplitudes decreased under the same input energy. The proposed model demonstrated significant agreement with experimental results across all composites. The low-to-mid-frequency damping behavior and orientation-dependent modal responses of FFRCs under hygroscopic cycling were characterized. A novel finite element model incorporating hydrophilic properties was developed to provide critical insights for aerospace vibration mitigation.

亚麻纤维增强复合材料（ffrc）作为可持续复合材料在航空航天领域的应用越来越受到关注，在航空航天领域，环境暴露下的减振性能至关重要。然而，吸湿效应对ffrc阻尼行为的影响，特别是在低频到中频范围内，仍然没有得到充分的了解。在本研究中，对ffrc在吸湿循环下的阻尼响应进行了全场频域分析。首先，对单向（0°、45°、90°）、正交各向异性和对称角层复合材料在可控温湿度条件下进行了吸湿循环实验。然后，通过非接触式三维扫描激光多普勒测振仪对不同吸湿周期下的复合材料进行测试，建立前五阶模态频率、吸湿性和阻尼比之间的关系。最后，在用户定义的材料子程序中，结合层压理论和复特征值方法建立了有限元模型，以预测全场频率范围内频率和湿度相关的阻尼响应。结果表明，吸湿循环作用下复合材料的阻尼比增大，频率降低，从而改变了能量耗散机制的频率依赖性。重新干燥到平衡水分含量并不能恢复初始的阻尼特性。吸湿循环后，在相同的输入能量下，共振响应幅度减小。该模型与所有复合材料的实验结果一致。研究了吸湿循环作用下ffrc的低-中频阻尼特性和方向相关模态响应。开发了一种包含亲水特性的新型有限元模型，为航空航天减振提供了重要见解。

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引用次数: 0

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 : 2026-02-08 Epub 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

Supramolecular network-modified pyrolytically recycled carbon fiber composites with recyclability, shape-memory effects, and flame retardation 具有可回收性、形状记忆效应和阻燃性的超分子网络改性热解再生碳纤维复合材料

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.2025.111450

Jiaming Li , Xinyu Lu , Hongmingjian Zhang , Haonuo He , Manxi Zhou , Xiaoping Yang , Gang Sui

With the continuous increase in the use of carbon fiber composites, the composite waste generated during production and application will always have an impact on the environment. By pyrolyzing carbon fiber composites, carbon fibers can be recycled, which is also beneficial for the sustainable development of carbon fiber composites. Compared to commercial carbon fiber (CFs), the performance of recycled carbon fiber (rCFs) is somewhat reduced, and it is generally mainly used as a low value filler. In order to enhance the application value of recycled fibers and broaden their application fields, we developed a simple, eco-friendly modification technique to construct supramolecular networks on the surface of rCFs. Evaluate the application effect of carbon fiber by preparing composite materials with tannic acid cured epoxy resin (TE). In comparison with rCFs composite samples, the supramolecular network modified rCF composites can achieve performance improvements through synergistic non covalent and covalent interface interactions: mechanical strength increased by 27.01 %, shape memory storage entropy energy density increased by 8.95 %, and structural stability was maintained under high temperature conditions. This work provides a new technological approach for the widespread application of recycled carbon fibers.

随着碳纤维复合材料使用量的不断增加，在生产和应用过程中产生的复合材料废弃物总是会对环境产生影响。通过对碳纤维复合材料进行热解，可以回收利用碳纤维，这也有利于碳纤维复合材料的可持续发展。与商用碳纤维（CFs）相比，再生碳纤维（rcf）的性能有所降低，一般主要用作低价值填料。为了提高再生纤维的应用价值，拓宽其应用领域，我们开发了一种简单、环保的改性技术，在再生纤维表面构建超分子网络。评价单宁酸固化环氧树脂（TE）制备碳纤维复合材料的应用效果。与rCF复合材料样品相比，超分子网络改性的rCF复合材料通过非共价界面和共价界面的协同作用实现了性能的提高：机械强度提高27.01%，形状记忆存储熵能密度提高8.95%，在高温条件下保持结构稳定性。本研究为再生碳纤维的广泛应用提供了新的技术途径。

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引用次数: 0

Numerical investigation of synergistic enhancement of carbon nanotubes and graphene nanoplatelets on electrical properties of hybrid composites 碳纳米管和石墨烯纳米片协同增强复合材料电性能的数值研究

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

Composites Science and Technology

Pub Date : 2026-01-05 Epub Date: 2025-10-12 DOI: 10.1016/j.compscitech.2025.111415

Zhen-Hua Tang, De-Yang Wang, Yuan-Qing Li, Shao-Yun Fu

In previous models of predicting the electrical behavior of hybrid conductive polymer composites (CPCs) with carbon nanotubes (CNTs) and another nanofiller of different geometry, CNTs were assumed to be straight and have constant length, but this is not practical for real-word CNT products. In this work, the synergistic enhancement in electrical properties of CNT/graphene nanoplatelet (GNP) hybrid CPCs is numerically investigated by considering CNT length non-uniformity and waviness characteristics. Firstly, a three-dimensional percolation network model featured with randomly distributed one-dimensional curved CNTs and two-dimensional rectangular GNPs is constructed, and percolation threshold and electrical conductivity are calculated based on Monte Carlo simulation. Subsequently, the influences of the nanofiller aspect ratio and content on electrical behaviors of hybrid CPCs are extensively investigated. Furthermore, a simple semi-empirical model is developed to describe the electrical synergistic enhancement in CNT/GNP CPCs, offering a convenient tool for composite design. The results demonstrate that optimizing the CNT-to-GNP content ratio and maximizing filler aspect ratios are key to achieving the optimal synergistic enhancement. Specifically, an optimal hybrid ratio for CPCs can reduce percolation threshold by up to 40 % compared to CNT-only composites and 50 % compared to GNP-only composites. Finally, the proposed model approach is validated against existing experimental data, demonstrating its effectiveness in predicting electrical properties of hybrid CPCs.

在先前预测碳纳米管（CNTs）和另一种不同几何形状的纳米填料混合导电聚合物复合材料（cpc）的电学行为的模型中，假设碳纳米管是直的并且具有恒定的长度，但这对于实际的碳纳米管产品是不实际的。在这项工作中，通过考虑碳纳米管长度不均匀性和波纹特性，数值研究了碳纳米管/石墨烯纳米板（GNP）混合CPCs电性能的协同增强。首先，构建了以随机分布的一维弯曲碳纳米管和二维矩形碳纳米管为特征的三维渗透网络模型，并基于蒙特卡罗模拟计算了渗透阈值和电导率。随后，广泛研究了纳米填料长径比和含量对杂化聚氯乙烯电性能的影响。此外，开发了一个简单的半经验模型来描述CNT/GNP cpc中的电协同增强，为复合材料设计提供了一个方便的工具。结果表明，优化碳纳米管与gnp的含量比和最大化填料长径比是实现最佳协同增强的关键。具体来说，与碳纳米管复合材料相比，cpc的最佳混合比例可以将渗透阈值降低高达40%，与仅gnp复合材料相比可降低50%。最后，根据现有的实验数据验证了所提出的模型方法，证明了其在预测混合cpc电性能方面的有效性。

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引用次数: 0

Electrical insulation EMI shielding epoxy-based composites with low thermal expansion for advanced electronic packaging 先进电子封装用低热膨胀环氧基电绝缘电磁干扰屏蔽复合材料

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

Composites Science and Technology

Pub Date : 2026-01-05 Epub Date: 2025-10-23 DOI: 10.1016/j.compscitech.2025.111420

Zeyu Zheng , Kuan Deng , Yang Liu , Hebin Zhang , Weijing Wu , Yan-Jun Wan , Rong Sun , Pengli Zhu

As electronic packaging enters a new era of high density and high frequency, conventional electromagnetic interference shielding (EMI) approaches based predominantly on high electrical conductivity are encountering critical risks of electrical reliability failure. To meet the innovative demands of advanced packaging applications, this work developed an FeNi@SiO₂/EP epoxy-based composite that integrated “electrical insulation, EMI shielding, and low thermal expansion”. SiO₂-decorated FeNi spheres particles with the Invar effect were prepared, with coating layer tuned via precursor concentration in a liquid-phase reaction. Effective control of the SiO₂ layer blocks electron transport in the composites while preserving the magnetic network and phonon transmission. The FeNi@SiO₂/EP composites successfully exhibited high electrical insulation (exceed 10¹² Ω cm), excellent EMI shielding efficiency (about 30 dB), and thermal conductivity. EMI shielding of the composites can be attributed to local eddy current losses in FeNi particles, magnetic losses induced by the continuous magnetic network, and interfacial dielectric losses at multiphase boundaries. Interestingly, the near-zero thermal expansion of FeNi particles imparts composites with a low coefficient of thermal expansion (7–8 ppm/°C). These innovations are expected to significantly promote the development of electronic devices toward higher integration and miniaturization, particularly in the field of electrical insulation EMI shielding materials.

随着电子封装进入高密度、高频的新时代，传统的基于高导电性的电磁干扰屏蔽（EMI）方法面临着电气可靠性失效的严重风险。为了满足先进封装应用的创新需求，这项工作开发了一种FeNi@SiO2/EP环氧基复合材料，该复合材料集成了“电绝缘、EMI屏蔽和低热膨胀”。制备了具有因瓦尔效应的二氧化硅修饰FeNi球，并通过液相反应中前驱体浓度来调整涂层层数。有效控制SiO2层阻断了复合材料中的电子传递，同时保持了磁网络和声子传输。FeNi@SiO2/EP复合材料成功地表现出高电绝缘性（超过1012 Ω cm），优异的EMI屏蔽效率（约30 dB）和导热性。复合材料的电磁干扰屏蔽可归因于FeNi颗粒中的局部涡流损耗、连续磁网络引起的磁损耗以及多相边界处的界面介电损耗。有趣的是，FeNi颗粒的近零热膨胀使复合材料具有较低的热膨胀系数（7-8 ppm/°C）。这些创新有望显著促进电子设备向更高集成化和小型化的方向发展，特别是在电绝缘EMI屏蔽材料领域。

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引用次数: 0

Rigid-flexible interface engineering of PANI/ZIF-67 coated basalt fibers for high-performance epoxy composites with EMI shielding capability 具有电磁干扰屏蔽性能的高性能环氧复合材料PANI/ZIF-67涂层玄武岩纤维的刚柔界面工程

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

Composites Science and Technology

Pub Date : 2026-01-05 Epub Date: 2025-10-10 DOI: 10.1016/j.compscitech.2025.111413

Wanghai Chen, Xuanyi Xu, Xinran Yang, Yuzi Jian, Jiazi Hou, Quanming Li, Yanli Dou

To enhance the interfacial adhesion and electromagnetic interference (EMI) shielding performance of basalt fiber-reinforced epoxy (BF/EP) composites, a hierarchical rigid–flexible structure was constructed by sequentially depositing polyaniline (PANI) and in-situ grown ZIF-67 nanosheets on basalt fibers. The PANI coating established a conductive network that facilitated charge transport and interfacial polarization, significantly improving electromagnetic wave absorption. Concurrently, the vertically aligned ZIF-67 provided structural rigidity and abundant interfacial bonding sites, promoting mechanical interlocking and stress transfer. This synergistic architecture created a gradient modulus interface, which effectively mitigated interfacial delamination and improved stress transfer efficiency. Compared to the BF/EP composites, the optimized Z3-PBF/EP composites demonstrated significant improvements in interfacial shear strength (63.7 %), interlaminar shear strength (78.6 %), flexural strength (44.2 %), flexural modulus (68.1 %) and impact strength (61.6 %). The EMI shielding effectiveness reached 32.74 dB, dominated by absorption loss due to the integrated conductive and porous architecture. This work provides an effective and facile strategy for simultaneously improving the mechanical properties of the composite and imparting EMI shielding capability to basalt fiber composites.

为了提高玄武岩纤维增强环氧树脂（BF/EP）复合材料的界面附着力和电磁干扰屏蔽性能，将聚苯胺（PANI）和原位生长的ZIF-67纳米片依次沉积在玄武岩纤维上，构建了刚柔复合材料的层次化结构。聚苯胺涂层建立了一个导电网络，促进了电荷传输和界面极化，显著提高了电磁波吸收。同时，垂直排列的ZIF-67提供了结构刚度和丰富的界面键合位点，促进了机械联锁和应力传递。这种协同结构创造了一个梯度模量界面，有效地缓解了界面分层，提高了应力传递效率。与BF/EP复合材料相比，优化后的Z3-PBF/EP复合材料在界面抗剪强度（63.7%）、层间抗剪强度（78.6%）、抗弯强度（44.2%）、抗弯模量（68.1%）和冲击强度（61.6%）方面均有显著提高。电磁干扰屏蔽效率达到32.74 dB，主要是由于导电和多孔结构的综合吸收损失。这项工作为同时提高玄武岩纤维复合材料的力学性能和增强电磁干扰屏蔽能力提供了一种有效而简便的策略。

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引用次数: 0