Composites Part B: Engineering最新文献_第3页

The thermomechanical coupling and multiscale correlation mechanism of Cf/C–SiC composites reinforced with chopped carbon fibers 短切碳纤维增强Cf/ C-SiC复合材料的热-力学耦合及多尺度相关机理

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2026-04-15 Epub Date: 2026-02-10 DOI: 10.1016/j.compositesb.2026.113513

Qiang Chen , Jian Huang , Daokui Li , Yicong Ye , Shuxin Bai

The evaluations of the thermomechanical properties and multiscale correlation between the effective elastic response and the thermal response of the chopped carbon fibers (c-Cf_(MP)) reinforced silicon carbide ceramic matrix (c-Cf_(MP)/C–SiC) composites, are investigated by experiments and numerical simulations. Unlike composites with continuous fibers, this study focuses on the unique multiscale architecture formed by randomly distributed chopped fibers, pyrolytic carbon interface, and SiC–Si effective matrix derived from reactive melt infiltration (RMI). The thermomechanical coupling mechanism across fiber-matrix interface, and the microstructural evolution from nanoscale interphases to mesoscale fiber networks determining the thermomechanical response, were demonstrated through a combined experiments and multiscale modeling approach. As a result, the use of shortened, highly graphitized fibers benefits to creating continuous thermal pathways while minimizing anisotropy of the composites. And then, the interfacial modification by the C_PyC is conducive to balancing stress dissipation in c-Cf_(MP)/C–SiC composite. Moreover, the appropriate amount of residual Si and the continuous distribution of SiC matrix determine the thermal conductivity of the composites. This work provides a foundational framework for the predictive design of Cf/C–SiC composites, moving beyond empirical approaches by linking tailored constituent architecture to predictable, coupled thermomechanical performance.

通过实验和数值模拟研究了短切碳纤维（c-Cf(MP)）增强碳化硅陶瓷基（c-Cf(MP)/ C-SiC）复合材料的热力学性能及有效弹性响应与热响应的多尺度相关性。与连续纤维复合材料不同，本研究侧重于随机分布的短切纤维、热解碳界面和反应性熔融渗透（RMI）产生的SiC-Si有效基体形成的独特多尺度结构。通过联合实验和多尺度建模方法，论证了纤维-基质界面的热力耦合机制，以及从纳米级界面到中尺度纤维网络的微观结构演变决定了热力响应。因此，使用缩短的、高度石墨化的纤维有利于创造连续的热路径，同时最大限度地减少复合材料的各向异性。然后，CPyC的界面改性有利于平衡c-Cf(MP)/ C-SiC复合材料的应力耗散。此外，适当的残余Si和SiC基体的连续分布决定了复合材料的导热性。这项工作为Cf/ C-SiC复合材料的预测设计提供了一个基础框架，通过将定制的成分结构与可预测的耦合热机械性能联系起来，超越了经验方法。

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引用次数: 0

Engineering functional mycelium-based composites: Innovations in thermal and acoustic insulation 工程功能菌丝体基复合材料：隔热和隔音的创新

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2026-04-15 Epub Date: 2026-01-29 DOI: 10.1016/j.compositesb.2026.113470

Kesiya George , Gonzalo Rodríguez-Grau , V.S. Manikandan , Paulo Molina , Mamie Sancy , Arun Thirumurugan

Bio-based alternatives to standard insulation and building systems are being thoroughly investigated because of the urgency of eco-friendly building materials that use less energy and produce fewer carbon emissions. Mycelium-based composites (MBCs) have attracted research enthusiasm all over the world; they are developed by growing mycelium over lignocellulosic residues, and these MBCs are low in density, porous, and biodegradable in nature. Recent studies underscore their potential in thermal and acoustic applications where these intrinsic properties are beneficial. In the context of burgeoning literature, this review singularly offers a comprehensive engineering assessment that simultaneously addresses thermal and acoustic design strategies for mycelium-based composites. Main recommendations are tailoring pore structure, hybridizing with complementary materials such as aerogels and phase change materials, and designing multi-layered systems to optimize sound absorption and thermal conductivity. However, limitations in the mechanical properties, water resistance, scalability, and the absence of consistent testing standards pose a challenge in benchmarking MBCs against conventional materials. Future studies must emphasize the enhancement of material uniformity, multifunctionality, and standard evaluation assessment for facilitating their wider utilization in the construction industry. Overall, MBCs drive the sustainable economy for an energy efficient and healthier in-built environment in building and construction.

生物基替代标准绝缘和建筑系统正在被彻底研究，因为迫切需要使用更少能源和产生更少碳排放的环保建筑材料。菌丝体基复合材料（MBCs）引起了全世界的研究热情；它们是通过在木质纤维素残基上生长菌丝体而发展起来的，这些MBCs密度低，多孔，本质上是可生物降解的。最近的研究强调了它们在热学和声学应用方面的潜力，这些内在特性是有益的。在新兴文献的背景下，本综述独特地提供了一个全面的工程评估，同时解决了菌丝体基复合材料的热学和声学设计策略。主要建议是调整孔隙结构，与互补材料（如气凝胶和相变材料）杂交，以及设计多层体系以优化吸声和导热性。然而，机械性能、耐水性、可扩展性等方面的限制，以及缺乏一致的测试标准，对MBCs与传统材料的基准测试构成了挑战。未来的研究必须强调提高材料的均匀性、多功能性和标准评价评价，以促进其在建筑行业的广泛应用。总体而言，MBCs推动可持续经济，在建筑和建设中实现节能和更健康的内置环境。

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引用次数: 0

An improved embedded element method using shell elements with full kinematic constraints for efficient mesoscale simulation of woven laminates 基于全运动约束壳单元的改进嵌入单元法对织合层压板进行了高效的中尺度模拟

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2026-04-15 Epub Date: 2026-02-07 DOI: 10.1016/j.compositesb.2026.113492

Weijie Zhang , Yiding Li , Ying Yan , Xi Zou , Xueliang Xiao , Shibo Yan

Mesoscale simulation of woven composite laminates offers high-fidelity stress analysis but is limited by the meshing complexity and high computational cost of conformal models. Embedded element methods (EEM) alleviate these challenges by embedding yarn representations within a solid host mesh. Using shell elements for yarns further reduces computational effort, but conventional shell-in-solid EEM couple only translational degrees of freedom (DOFs), leading to kinematic incompatibility and significant stiffness underestimation for laminates under bending and transverse-shear loading. This work develops an improved shell-in-solid EEM with full kinematic constraints that couple both translational and rotational DOFs of the embedded shell elements to solid elements in the host mesh. The method restores bending and transverse-shear fidelity at a fraction of the computational cost of solid-in-solid EEM. Under small deformation assumptions, consistent constraint and overlap-stiffness formulations are derived and implemented within a standard finite element workflow. The method is firstly tested on a cantilever beam model with span-to-thickness ratios from 32 to 4. Results show less than 0.8% deflection error compared with conformal references, while a translational-only scheme produces about 40% error in the most shear-dominated case. In addition, in a quasi-static three-point bending test of plain-woven laminates, the method is validated in comparison to the experimental load–displacement envelope, and the results agree with a solid-in-solid baseline model in global response and local strain distributions. The proposed approach achieves 17.6 times speedup over solid-in-solid EEM, enabling accurate and efficient mesoscale simulation. The method is also readily implemented in commercial finite element packages.

机织复合材料层合板的中尺度模拟提供了高保真的应力分析，但受保形模型网格划分复杂和计算成本高的限制。嵌入元素方法（EEM）通过在实体主机网格中嵌入纱线表示来缓解这些挑战。使用壳体单元进一步减少了纱线的计算工作量，但传统的壳体-实心EEM耦合只有平移自由度，导致弯曲和横向剪切载荷下层合板的运动不相容和刚度严重低估。这项工作开发了一种改进的实体壳EEM，具有完整的运动学约束，将嵌入的壳单元的平移和旋转自由度与主机网格中的实体单元耦合在一起。该方法恢复了弯曲和横向剪切保真度，而计算成本只是固体-固体EEM的一小部分。在小变形假设下，推导出一致约束和重叠刚度公式，并在标准有限元工作流程中实现。首先对跨厚比为32 ~ 4的悬臂梁模型进行了试验。结果表明，与共形参考文献相比，挠度误差小于0.8%，而在剪切占主导地位的情况下，仅平移方案的挠度误差约为40%。此外，在平面编织层压板的准静态三点弯曲试验中，将该方法与试验荷载-位移包络线进行了对比验证，结果表明该方法在整体响应和局部应变分布上与实体-实体基线模型一致。该方法的加速速度是固体-固体EEM的17.6倍，能够实现准确高效的中尺度模拟。该方法也很容易在商业有限元软件包中实现。

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引用次数: 0

Honeycomb-structure coupled ordered/disordered composite aramid-based aerogel for broadband sound absorption 蜂窝状结构耦合有序/无序复合芳纶基宽带吸声气凝胶

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2026-04-15 Epub Date: 2026-01-29 DOI: 10.1016/j.compositesb.2026.113442

Lulu Song , Liting He , Hansheng Liu , Hao Li , Xiaoang Liu

The noise generated by various activities exhibits distinct characteristics, with most being broadband across the entire frequency spectrum. However, existing sound-absorbing materials often struggle to achieve a balanced acoustic performance across both low and high frequencies, which limits their overall noise reduction efficacy. To address this challenge, this study utilizes a cryogenic casting technique to fabricate an ordered/disordered composite aerogel. The multi-level pore structure, tailored through different freezing protocols, effectively dissipates acoustic energy according to the characteristics of different frequency bands, thereby enabling broadband sound absorption. The aramid-based aerogel was then assembled with an aramid honeycomb aerogel via a molding process, forming a novel composite structure (Water aramid nanofiber honeycomb) (WANH). The synergistic effect within this hierarchical composite significantly enhanced its acoustic performance. The WANH composite achieves a Noise Reduction Coefficient (NRC) of 0.61 over the 50–6300 Hz frequency range. Additionally, the ordered-channel aerogel maintains excellent thermal insulation, with a conductivity of 0.032 W/(m·K). This work expands the potential applications of aramid-based aerogels in environments that demand superior broadband sound absorption and tunable thermal management.

各种活动产生的噪声表现出不同的特征，其中大多数在整个频谱上都是宽带的。然而，现有的吸声材料往往难以在低频率和高频率上实现平衡的声学性能，这限制了它们的整体降噪效果。为了解决这一挑战，本研究利用低温铸造技术来制造有序/无序复合气凝胶。多层孔隙结构通过不同的冻结方案定制，根据不同频段的特性有效地消散声能，从而实现宽带吸声。然后通过模压工艺将芳纶基气凝胶与芳纶蜂窝气凝胶组装，形成一种新型复合结构（水芳纶纳米纤维蜂窝）（WANH）。这种分层复合材料的协同效应显著提高了其声学性能。在50-6300 Hz频率范围内，WANH复合材料的降噪系数（NRC）为0.61。此外，有序通道气凝胶保持了优异的隔热性能，电导率为0.032 W/（m·K）。这项工作扩大了芳纶气凝胶在需要卓越的宽带吸声和可调热管理的环境中的潜在应用。

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引用次数: 0

Compression damage evolution and strength prediction model for 3D braided composites with cutouts at room and high temperature 含切口的三维编织复合材料室温和高温压缩损伤演化及强度预测模型

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2026-04-15 Epub Date: 2026-02-10 DOI: 10.1016/j.compositesb.2026.113511

Hao Song , Zhiheng Wang , Haojie Xu , Kangmei Li , Jun Hu

The temperature dependence of compressive behavior in notched and unnotched specimens is crucial for the structural design and application of braided composite tubes. This study examines the compressive damage mechanisms of three-dimensional four-directional(3D4D) braided composite tubes with different hole sizes at both room and elevated temperatures and develops a strength prediction model. Employing multiscale experimental techniques including Digital Image Correlation (DIC), Infrared Thermal Imaging (IRT), and X-ray Computer Tomography (XCT), the study comprehensively captured the material's full-field deformation, thermal response, and internal damage evolution. Findings reveal that elevated temperatures fundamentally alter the failure mode: the brittle fracture observed at room temperature transforms into ductile instability dominated by fibre micro-buckling and extensive debonding at fibre-matrix interfaces. Increased hole size significantly accelerates strain concentration, leading to the formation of macroscale shear zones and triggering non-linear degradation in strength, stiffness, and energy absorption capacity. Notably, under quasi-static loading, IRT revealed pronounced cold spots around the hole, indicating that energy absorption from damage exceeded heat generation. This phenomenon fundamentally reverses the expected hot-spot response pattern. 3D-DIC revealed heightened strain distribution inhomogeneity with increasing temperature. CT analysis uncovered a sequential failure mechanism: interfacial delamination and matrix cracking initiated near the hole, followed by coordinated fibre bundle buckling, culminating in shear band propagation. The strength prediction model established in this study integrates hole size and temperature effects, exhibiting good agreement with experimental data. This work elucidates the coupled effects of high-temperature softening and geometric discontinuities on damage localization, laying the foundation for damage tolerance design of braided composites in thermomechanical environments.

有缺口和无缺口试件压缩性能的温度依赖性对编织复合材料管的结构设计和应用至关重要。本文研究了不同孔尺寸的三维四向编织复合材料管在室温和高温下的压缩损伤机制，并建立了强度预测模型。采用数字图像相关（DIC）、红外热成像（IRT）和x射线计算机断层扫描（XCT）等多尺度实验技术，全面捕捉了材料的全场变形、热响应和内部损伤演化过程。研究结果表明，高温从根本上改变了破坏模式：在室温下观察到的脆性断裂转变为以纤维微屈曲和纤维基体界面广泛脱粘为主的韧性失稳。增大孔尺寸显著加速应变集中，导致宏观剪切区形成，引发强度、刚度和能量吸收能力的非线性退化。值得注意的是，在准静态载荷下，IRT在孔周围显示出明显的冷点，表明损伤吸收的能量超过了产生的热量。这一现象从根本上扭转了预期的热点响应模式。3D-DIC显示应变分布不均匀性随温度升高而增强。CT分析揭示了连续的破坏机制：孔附近开始界面分层和基体开裂，随后纤维束协同屈曲，最终导致剪切带扩展。本文建立的强度预测模型综合考虑了孔尺寸和温度的影响，与实验数据吻合较好。阐明了高温软化和几何不连续对损伤局部化的耦合影响，为热机械环境下编织复合材料损伤容限设计奠定了基础。

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引用次数: 0

Thermal-buffering phase change microcapsules embedded into MXene aerogels toward synchronous infrared stealth and electromagnetic shielding 嵌入MXene气凝胶的热缓冲相变微胶囊同步红外隐身和电磁屏蔽

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2026-04-15 Epub Date: 2026-02-02 DOI: 10.1016/j.compositesb.2026.113483

Hao-hao Song, Zi-cheng Tang, Zi-jie Huang, Qin Wang, De-xiang Sun, Jing-hui Yang, Xiao-dong Qi, Yong Wang

Lightweight multifunctional materials capable of mitigating electromagnetic interference (EMI) and infrared radiation are highly desirable for aerospace and military equipment. Conventional MXene aerogels still suffer from temperature rise under transient thermal shock due to their limited heat capacity and relatively high thermal diffusivity. Herein, phase change microcapsules (PCCs) with latent heat absorption capability were introduced into the MXene aerogel framework via ice-templated assembly. The MXene/PCC (MP) aerogels possess a three-dimensional (3D) porous structure with uniformly dispersed PCCs, achieving a low thermal conductivity of 0.0493 W m⁻¹ K⁻¹. Moreover, the embedded PCCs actively absorb heat through solid-liquid phase transitions, thereby increasing heat capacity (28.38 J g⁻¹ K⁻¹) and suppressing thermal diffusivity (0.08 mm² s⁻¹), effectively delaying heat propagation. By combining porous thermal insulation, phase‐change heat absorption, and low infrared emissivity of MXene, the MP aerogels markedly enhance resistance to transient thermal shock, maintaining a bottom-region temperature up to 9.67 °C lower than that of the MXene aerogel under 120 °C heating. Finally, the 3D conductive MXene network provides continuous electron pathways and interfaces for polarization and multiple reflections, while PCCs effectively absorb heat generated by electromagnetic losses, achieving reflection-dominated EMI shielding of 35.44 dB. By embedding PCCs into the framework of MXene aerogels, the simultaneous construction of a microporous structure and a phase-change skeleton endows the MXene aerogels with excellent infrared stealth and EMI shielding performance, thereby demonstrating their applicability in aerospace and defense fields.

能够减轻电磁干扰（EMI）和红外辐射的轻质多功能材料是航空航天和军事装备非常需要的。传统的MXene气凝胶由于其有限的热容量和相对较高的热扩散率，在瞬态热冲击下仍然会出现温升。本文通过冰模板组装将具有潜热吸收能力的相变微胶囊（PCCs）引入到MXene气凝胶框架中。MXene/PCC （MP）气凝胶具有三维（3D）多孔结构，具有均匀分散的PCC，导热系数为0.0493 W m−1 K−1。此外，嵌入的PCCs通过固液相变积极吸收热量，从而增加了热容量（28.38 J g−1 K−1），抑制了热扩散率（0.08 mm2 s−1），有效地延缓了热传播。通过结合MXene的多孔隔热、相变吸热和低红外发射率，MP气凝胶显著增强了对瞬态热冲击的抵抗能力，在120℃加热下，MP气凝胶的底区温度比MXene气凝胶低9.67℃。最后，三维导电MXene网络为极化和多次反射提供了连续的电子路径和接口，而PCCs有效地吸收了电磁损耗产生的热量，实现了35.44 dB的反射主导的EMI屏蔽。通过将PCCs嵌入到MXene气凝胶的框架中，同时构建微孔结构和相变骨架，使MXene气凝胶具有优异的红外隐身性能和EMI屏蔽性能，从而展示了其在航空航天和国防领域的适用性。

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引用次数: 0

CNT film–integrated polyimide composites: Scalable joule heated infusion process and multifunctional aerospace applications 碳纳米管薄膜集成聚酰亚胺复合材料：可扩展焦耳加热灌注工艺和多功能航空航天应用

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2026-04-15 Epub Date: 2026-02-02 DOI: 10.1016/j.compositesb.2026.113471

Mi Ju Jeong , Song Hee Kim , Dayoung Kim , SeungWoo Jung , Taehoon Kim , Youngseok Oh , Yunlan Zhang , Dong Gi Seong

This study reports a polyimide-based carbon fiber reinforced polymer composite integrated with carbon nanotube films (CNTF) through a Joule heated infusion process for multifunctional aerospace applications. A dual CNTF configuration was employed to function both as an electrothermal heating element during processing and as a permanent multifunctional surface layer in the final laminate. Direct Joule heating provided rapid and spatially uniform thermal input to the laminate under vacuum, which effectively suppressed void formation during processing and reduced the void content from 6.8% to 2.3% compared with conventional compression molding. This reduction in structural defects mitigated void-induced stress concentration within the composite, while the reduced void content and uniform thermal history resulted in an increased glass transition temperature of 362 °C. Consequently, the composites exhibited improvements of 6% and 10% in flexural and tensile strengths, respectively. In addition, the integrated CNTF imparted multifunctional surface properties, including rapid de-icing within 240 s, enhanced hydrophobicity with a water contact angle of 128.1°, and enhanced electromagnetic shielding effectiveness, increasing from 50.4 to 58.5 dB in the X-band frequency range. The Joule heating process required only 5.8% of the energy consumption of conventional hot pressing, demonstrating a scalable and energy-efficient route for manufacturing multifunctional polyimide composites for aerospace applications.

本研究报道了一种聚酰亚胺基碳纤维增强聚合物复合材料与碳纳米管薄膜（CNTF）通过焦耳加热灌注工艺集成的多功能航空航天应用。采用双重CNTF结构，在加工过程中作为电热加热元件，并在最终层压板中作为永久多功能表面层。在真空条件下，直接焦耳加热为层压板提供了快速且空间均匀的热输入，有效抑制了加工过程中的孔隙形成，与传统压缩成型相比，孔隙含量从6.8%降低到2.3%。结构缺陷的减少减轻了复合材料中空洞引起的应力集中，而空洞含量的减少和均匀的热历史导致玻璃化转变温度提高了362℃。结果表明，复合材料的抗弯强度和抗拉强度分别提高了6%和10%。此外，集成的CNTF还具有多种表面特性，包括240 s内快速除冰，疏水性增强，水接触角达到128.1°，电磁屏蔽效能增强，在x波段频率范围内从50.4 dB增加到58.5 dB。焦耳加热工艺的能耗仅为传统热压的5.8%，为制造用于航空航天应用的多功能聚酰亚胺复合材料展示了一条可扩展和节能的路线。

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引用次数: 0

Moisture-stable aluminum nitride via conformal Parylene passivation for reliable high-performance thermal interface materials 湿稳定的氮化铝通过保形聚对二甲苯钝化可靠的高性能热界面材料

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2026-04-15 Epub Date: 2026-01-31 DOI: 10.1016/j.compositesb.2026.113475

Jisu Park , Minseob Lim , Dashdendev Tsogbayar , Taehoon Hwang , Jungyoon Seo , Yumin Kim , Hyeonjun Jung , Suhyun Oh , Hyekyeong Kim , Yong-Ho Choa , Hwa Sung Lee

Aluminum nitride (AlN) is a promising thermal interface material (TIM) filler owing to its high thermal conductivity (∼300 W m⁻¹ K⁻¹), electrical insulation, and dielectric properties; however, its intrinsic vulnerability to moisture-induced hydrolysis leads to phase transformation into Al(OH)₃, causing a severe loss of thermal conductivity and long-term reliability. In this study, we employ a conformal Parylene chemical vapor deposition coating as an effective passivation approach to enhance AlN's moisture resistance while preserving its intrinsic thermal and electrical characteristics. A uniform, defect-free Parylene layer effectively blocked moisture ingress and suppressed hydrolysis-induced degradation. Epoxy composites incorporating Parylene-passivated AlN retained 97 % of their initial thermal conductivity even after 10 days of immersion in 100 °C water under extreme hydrothermal conditions, whereas pristine AlN retained only 23 %. Infrared thermography and LED heat dissipation tests confirmed stable and superior heat transfer performance under prolonged moisture exposure. Furthermore, the composites maintained high volume resistivity (>6.9 × 10¹³ Ω cm) and structural integrity after 100 thermal shock cycles between −20 °C and 100 °C. By applying AlN, a next-generation thermal management material attracting considerable attention, this Parylene-based passivation demonstrates strong potential for realizing reliable, high-performance TIM composites for practical high-power electronic applications.

氮化铝（AlN）具有高导热系数（~ 300 W m−1 K−1）、电绝缘性和介电性能，是一种很有前途的热界面材料（TIM）填料；然而，其固有的易受水分水解的脆弱性导致相变为Al(OH)3，导致导热性和长期可靠性的严重损失。在本研究中，我们采用保形聚对二甲苯化学气相沉积涂层作为一种有效的钝化方法来增强AlN的抗湿性，同时保持其固有的热学和电学特性。一个均匀的，无缺陷的聚二甲苯层有效地阻止水分的进入和抑制水解引起的降解。在极端热液条件下，在100°C的水中浸泡10天后，含聚苯二烯钝化AlN的环氧复合材料仍保持了97%的初始导热系数，而原始AlN仅保留了23%。红外热像仪和LED散热测试证实了在长时间潮湿暴露下稳定而优越的传热性能。此外，复合材料在- 20°C至100°C的100次热冲击循环后仍保持较高的体积电阻率（>6.9 × 1013 Ω cm）和结构完整性。通过应用AlN（一种备受关注的下一代热管理材料），这种基于聚苯乙烯的钝化显示出强大的潜力，可以实现可靠、高性能的TIM复合材料，用于实际的高功率电子应用。

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引用次数: 0

Interpretable and physics-informed graph neural modeling for intelligent damage localization in CFRP composites CFRP复合材料智能损伤定位的可解释和物理信息图神经模型

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2026-04-15 Epub Date: 2026-02-04 DOI: 10.1016/j.compositesb.2026.113469

Xinming Li , Jinrui Zhang , Kehui Zhu , Qingrui Hu , Lingyu Sun , Jiawei Gu , Wenhan Lyu , Yanxue Wang

Reliable and interpretable detection of structural damage in carbon fiber–reinforced polymer (CFRP) composites remains a fundamental challenge in structural health monitoring, as wave propagation is strongly influenced by anisotropy, multimodal interference, and complex boundary conditions. Traditional model driven and deep learning approaches often fail to maintain both accuracy and physical consistency in such heterogeneous propagation environments, thereby limiting their scalability to real world engineering applications. To address these limitations, this study introduces a Physics-Informed Graph Modeling framework with Individualized Dynamics (PIGMind), which integrates physical priors with graph based representation learning to achieve intelligent damage localization. The framework embeds physics derived energy indicators into graph construction, allowing the adjacency topology to explicitly represent the directional dependence of ultrasonic guided wave propagation. Furthermore, a node personalized embedding mechanism and a regularization enhanced decoding module are incorporated to capture path level heterogeneity and preserve geometric consistency within the latent space. Extensive experiments on a CFRP plate instrumented with an eight-sensor array demonstrate that PIGMind achieves a mean localization error of 10.18 mm, representing a 7.8% improvement over the graph based methods, while maintaining stable performance under anisotropic and noisy conditions. Beyond quantitative performance, the framework reconstructs physically interpretable latent manifolds that capture intrinsic patterns of energy diffusion and coupling, thereby bridging data driven inference with wave propagation physics. This work establishes a generalizable paradigm for physics-informed spatiotemporal graph learning, paving the way for scalable, interpretable, and physically consistent intelligent damage diagnosis in complex composite structures.

由于波的传播受到各向异性、多模态干涉和复杂的边界条件的强烈影响，对碳纤维增强聚合物（CFRP）复合材料的结构损伤进行可靠和可解释的检测仍然是结构健康监测的一个基本挑战。传统的模型驱动和深度学习方法往往无法在这种异构传播环境中保持准确性和物理一致性，从而限制了它们在现实世界工程应用中的可扩展性。为了解决这些限制，本研究引入了具有个性化动力学的物理知情图建模框架（PIGMind），该框架将物理先验与基于图的表示学习相结合，以实现智能损伤定位。该框架将物理导出的能量指示器嵌入到图构造中，允许邻接拓扑明确地表示超声导波传播的方向依赖性。此外，采用节点个性化嵌入机制和正则化增强解码模块来捕获路径级异构性并保持潜在空间内的几何一致性。在装有8个传感器阵列的CFRP板上进行的大量实验表明，PIGMind的平均定位误差为10.18 mm，比基于图的方法提高了7.8%，同时在各向异性和噪声条件下保持稳定的性能。除了定量性能之外，该框架还重建了物理上可解释的潜在流形，这些流形捕获了能量扩散和耦合的内在模式，从而将数据驱动的推断与波传播物理联系起来。这项工作为基于物理的时空图学习建立了一个可推广的范式，为复杂复合结构中可扩展、可解释和物理一致的智能损伤诊断铺平了道路。

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引用次数: 0

Robust doping strategy for carbon nanotube sheets via covalent functionalization 共价功能化碳纳米管片的鲁棒掺杂策略

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2026-04-15 Epub Date: 2026-02-05 DOI: 10.1016/j.compositesb.2026.113482

Minseouk Choi , Kyung Tae Park , Dong Uk Woo , Jinho Jang , Kyunbae Lee , Yeonsu Jung , Hyejin Jang , Taehoon Kim

Doped carbon nanotube sheets (CNTSs) are promising conductive materials for copper alternatives, but their practical use is limited by poor doping stability from weak van der Waals interactions, causing desorption in solvents. Here, we introduce a novel method for stable n-type and p-type doping by covalently functionalizing CNTSs with amine and sulfonic groups, respectively. Our amine- and sulfonic-functionalized CNTSs show significantly improved specific electrical conductivities of 20,490 and 17,593 S cm² g⁻¹, compared to 11,475 S cm² g⁻¹ for pristine CNTS. For practical applications, they were applied as electromagnetic interference (EMI) shielding films and current collectors for supercapacitors. They exhibit enhanced EMI shielding effectiveness (SE) of 44.6 and 40.9 dB at 8.2 GHz (5.2 μm), respectively, compared to 34.5 dB of pristine CNTSs. Also, amine-functionalized CNTSs show outstanding absolute SE of 431,250 dB cm² g⁻¹ owing to improved conductivity while maintaining lightweight nature of CNTSs. Critically, they maintained their conductivity and EMI SE after washing with diluted sulfuric acid, potassium hydroxide solution, DI water, as well as after annealing, bending, and air exposure, unlike conventionally doped CNTSs suffering from dopant leaching. Furthermore, when applied as supercapacitor current collectors and electrode, functionalized CNTSs exhibit enhanced rate capabilities due to their robust conductivity. Unlike physisorbed dopants, which leach into electrolytes and degrade performance, covalent functionalization ensures stable doping and consistent performance within the electrolyte. This new strategy offers a significant breakthrough in both the electrical conductivity and long-term stability of CNTSs, opening doors for diverse and demanding applications.

掺杂碳纳米管片（CNTSs）是一种很有前途的铜替代品导电材料，但由于弱范德华相互作用导致掺杂稳定性差，导致溶剂解吸，限制了其实际应用。在这里，我们介绍了一种新的方法，通过胺基和磺酸基的共价官能化cnts来稳定n型和p型掺杂。与原始碳纳米管的11,475 S cm2 g - 1相比，我们的胺和磺酸功能化碳纳米管的比电导率显著提高，分别为20,490和17,593 S cm2 g - 1。在实际应用中，它们被应用于超级电容器的电磁干扰（EMI）屏蔽膜和集流器。与原始cnts的34.5 dB相比，它们在8.2 GHz （5.2 μm）下的EMI屏蔽效率（SE）分别为44.6和40.9 dB。此外，胺功能化碳纳米管的绝对SE值为431,250 dB cm2 g−1，这是由于碳纳米管的导电性得到了改善，同时又保持了碳纳米管的轻量化。关键的是，它们在用稀释的硫酸、氢氧化钾溶液、去离子水洗涤以及退火、弯曲和空气暴露后保持了导电性和EMI SE，而不像传统掺杂的cnts受到掺杂剂浸出的影响。此外，当用作超级电容器集流器和电极时，功能化碳纳米管由于其强大的导电性而表现出增强的速率能力。不像物理吸附的掺杂剂会渗入电解质并降低性能，共价官能化确保了稳定的掺杂和电解质内一致的性能。这种新策略在cnts的导电性和长期稳定性方面都取得了重大突破，为各种苛刻的应用打开了大门。

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引用次数: 0