Composites Communications最新文献_第2页

Hierarchically Porous–Dense bilayer coating with improved solar reflection and outdoor durability for radiative cooling 分层多孔致密双层涂层，提高太阳反射和户外辐射冷却耐久性

IF 7.7 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications

Pub Date : 2026-02-01 DOI: 10.1016/j.coco.2026.102729

Huaijun Nie , Long-Biao Huang , Xiaonan Xu , Ziqi Li , He Liu , Hao Wang , Chuluo Yang

Passive daytime radiative cooling (PDRC) provides an energy-free strategy for building thermal management and mitigating global warming, yet coatings that simultaneously deliver high optical performance, environmental durability, and scalable processability remain elusive. Here, we report a scalable hierarchically porous–dense bilayer PDRC architecture featuring a novel hierarchically porous top layer integrated onto a dense polymeric bottom layer. The dense bottom layer ensures strong substrate adhesion, structural protection, and high visible–near-infrared reflectance, while the graded porous top layer resolves the long-standing adhesion–reflectance trade-off inherent to conventional porous and dense coatings. Specifically, a highly porous upper region enables efficient ultraviolet reflection and superhydrophobic self-cleaning, whereas a denser lower region ensures robust interfacial bonding. Benefiting from this unique design, the optimized coating achieves an average solar reflectance of 93.5%, an average sub-ambient cooling of −2.24 °C under direct sunlight, and excellent optical stability, retaining 99% of its initial reflectance after five months of outdoor exposure. This work demonstrates that a rationally designed hierarchically porous top layer can effectively bridge high radiative cooling efficiency with the durability requirements of architectural coatings, providing a practical and scalable pathway toward low-carbon building cooling.

被动日间辐射冷却（PDRC）为建筑热管理和减缓全球变暖提供了一种无能源策略，但同时提供高光学性能、环境耐久性和可扩展加工性的涂层仍然难以捉摸。在这里，我们报告了一个可扩展的分层多孔致密双层PDRC结构，其特点是将新颖的分层多孔顶层集成到致密聚合物底层上。致密的底层确保了很强的基材附着力、结构保护和高可见-近红外反射率，而分级多孔的顶层解决了传统多孔和致密涂层长期存在的附着力和反射率之间的权衡。具体来说，高度多孔的上部区域可以实现有效的紫外线反射和超疏水自清洁，而较致密的下部区域可以确保牢固的界面结合。得益于这种独特的设计，优化后的涂层在阳光直射下的平均太阳反射率为93.5%，亚环境平均冷却温度为- 2.24°C，并且具有出色的光学稳定性，在室外暴露五个月后仍能保持99%的初始反射率。该研究表明，合理设计的分层多孔顶层可以有效地将高辐射冷却效率与建筑涂料的耐久性要求相结合，为低碳建筑冷却提供了一条实用且可扩展的途径。

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引用次数: 0

Enhancing mechanical properties and electrical conductivity of Cu-Ti-Si alloys through tailored thermomechanical processing 通过定制热机械加工提高Cu-Ti-Si合金的机械性能和导电性

IF 7.7 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications

Pub Date : 2026-02-01 DOI: 10.1016/j.coco.2026.102738

Guosheng Chen, Cailiu Yin, Xinjiang Zhang, Chengcheng Peng, Zhengwei Liu, Huan Chen, Chunqiang Yi, Wenbo Zhu

A novel Cu–Ti–Si alloy was designed to achieve multiple strengthening mechanisms and high electrical conductivity through heat-treatment–induced micro/nano-precipitation and solid-solution strengthening. The addition of silicon markedly enhances the microhardness of the Cu–Ti system by promoting Ti₅Si₃ precipitation. The alloy was processed by 70 % cold rolling followed by aging at 450 °C for 120 min under optimized conditions. The optimized material exhibits a tensile strength of 500 MPa and an electrical conductivity of 66.8 % IACS. Microstructure and texture evolution after aging were characterized by transmission electron microscopy (TEM) and scanning electron microscopy (SEM), revealing a high density of Ti₅Si₃ precipitates with micro- and nano-scale dimensions that correlate with the observed improvements in mechanical properties and conductivity. Among the strengthening mechanisms, Ti₅Si₃ precipitation provides the dominant contribution, acting synergistically with solid-solution strengthening and grain-boundary effects to deliver an outstanding combination of strength and electrical performance.

设计了一种新型Cu-Ti-Si合金，通过热处理诱导的微纳析出和固溶强化，实现了多种强化机制和高导电性。硅的加入通过促进Ti5Si3的析出，显著提高了Cu-Ti体系的显微硬度。对该合金进行70%冷轧，然后在优化条件下450℃时效120 min。优化后的材料抗拉强度为500mpa，电导率为66.8% IACS。通过透射电子显微镜（TEM）和扫描电子显微镜（SEM）对时效后的组织和织构演变进行了表征，发现Ti5Si3析出物密度高，具有微纳米尺度，与力学性能和电导率的改善有关。在强化机制中，Ti5Si3的析出是主要的贡献，它与固溶强化和晶界效应协同作用，提供了出色的强度和电性能组合。

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引用次数: 0

Porous N-doped carbon nanofibers coupled with oxygen vacancy-riched ultra-small CeO2 nanoparticles for lightweight and efficient microwave absorption 多孔n掺杂碳纳米纤维与富氧空位的超小CeO2纳米颗粒耦合用于轻质高效微波吸收

IF 7.7 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications

Pub Date : 2026-02-01 DOI: 10.1016/j.coco.2026.102732

Xuge Niu, Haoyan Zhang, Fen Wu, Siyi Tong, Jun Xiang

Developing the lightweight and high-efficiency microwave absorbing materials (MAMs) has been highly desired but remained a great challenge. Herein, an ultra-small CeO₂ nanoparticles (NPs) decorated porous N-doped carbon nanofibers (CeO₂@PNCNFs) composite was fabricated in situ through an electrospinning process followed by high-temperature carbonization. The remarkable difference in the work function on both sides of CeO₂/N-doped carbon hetero-junction/interface elevates the interfacial polarization especially in high frequency region. Benefitting from the synergistic contribution of improved impedance matching by the introduction of pores, three-dimensional conductive network (3D) built by PNCNFs, multiple heterogeneous junctions/interfaces, foreign N heteroatoms, and ultra-small CeO₂ NPs with abundant oxygen vacancies and lattice defects, the CeO₂@PNCNFs composite shows excellent microwave absorption (MA) performance. Notably, at a low filler content of 10 wt%, a minimum reflection loss (RL_min) of −61.66 dB at 1.90 mm and a broad maximum effective absorption bandwidth (EAB_max) of 5.68 GHz at 1.95 mm can be achieved, which are outperforming to most of previously reported rare earth oxide-based MAMs. Moreover, the CeO₂@PNCNFs absorber delivers a remarkable radar cross section reduction of 26.28 dB m², thus significantly decreasing the detectability of targets by radar systems. Overall, the present work provides an effective strategy for regulating microstructure to enhance MA ability and also designing lightweight and high-performance rare earth oxide-based MAMs.

研制轻质、高效的微波吸收材料已成为人们的迫切需要，但仍是一个巨大的挑战。本文通过静电纺丝和高温碳化制备了一种超小CeO2纳米颗粒修饰的多孔n掺杂碳纳米纤维（CeO2@PNCNFs）复合材料。CeO2/ n掺杂碳异质结/界面两侧功函数的显著差异提高了界面极化，特别是在高频区。得益于孔隙的引入、PNCNFs构建的三维导电网络（3D）、多个异质结/界面、外源N杂原子以及具有丰富氧空位和晶格缺陷的超小型CeO2 NPs的协同作用，CeO2@PNCNFs复合材料表现出优异的微波吸收（MA）性能。值得注意的是，当填料含量为10 wt%时，1.90 mm处的最小反射损耗（RLmin）为- 61.66 dB， 1.95 mm处的最大有效吸收带宽（EABmax）为5.68 GHz，优于之前报道的大多数稀土氧化物基MAMs。此外，CeO2@PNCNFs吸收体可显著降低26.28 dB m2的雷达横截面，从而显著降低雷达系统对目标的可探测性。总之，本研究为调控微观结构以提高复合材料性能以及设计轻量化、高性能的稀土氧化物基复合材料提供了有效的策略。

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引用次数: 0

Dual cross-linked tannic acid–micro-nano dialdehyde cellulose/PVA films with enhanced mechanical, damp-heat, and antibacterial performance 双交联单宁酸-微纳米双醛纤维素/PVA薄膜具有增强的机械，湿热和抗菌性能

IF 7.7 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications

Pub Date : 2026-02-01 DOI: 10.1016/j.coco.2026.102741

Yanji Cui , Yulong Zhang , Xiaoqiu Zhong , Zhu-Bao Shao , Jianhui Qiu , Longxiang Zhu

Bio-based TA–MNDAC/PVA composite films were developed through a dual-cross-linking strategy using tannic acid (TA) and micro/nano-dialdehyde cellulose (MNDAC). The synergistic interaction between covalent and hydrogen bonding networks significantly enhanced the comprehensive performance of composite films. The optimized TA_2.0-MNDAC₃/PVA film exhibited excellent mechanical strength (89.46 MPa), fracture elongation (128.72 %), and thermal stability (T_max = 371 °C). Moreover, TA incorporation endowed the films with strong UV-shielding ability and remarkable antibacterial activity, achieving >99.9 % inhibition against E. coli and S. aureus at over 1.5 wt% TA. The films maintained their integrity after five hydrothermal cycles at 110 °C, demonstrating outstanding high-temperature resistance. These findings demonstrate that the multifunctional, durable PVA-based films offer a versatile bio-based platform for advanced packaging, biomedical, and protective applications.

以单宁酸（TA）和微/纳米双醛纤维素（MNDAC）为原料，通过双交联策略制备了生物基TA - MNDAC/PVA复合膜。共价网络和氢键网络之间的协同作用显著提高了复合膜的综合性能。优化后的ta2.0 - mndaac3 /PVA薄膜具有优异的机械强度（89.46 MPa）、断裂伸长率（128.72%）和热稳定性（Tmax = 371℃）。此外，TA的掺入使膜具有较强的紫外线屏蔽能力和显著的抗菌活性，当TA含量超过1.5 wt%时，对大肠杆菌和金黄色葡萄球菌的抑制率达到99.9%。经过5次110℃的热液循环后，薄膜保持了完整性，表现出优异的耐高温性能。这些发现表明，多功能、耐用的pva基薄膜为先进的包装、生物医学和防护应用提供了一个多功能的生物基平台。

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引用次数: 0

Synergistic structural integration of garnet and perovskite phases in Eu3Fe5O12–La0.5Nd0.5FeO3 composites for optimized ferroelectric and magnetoelectric coupling Eu3Fe5O12-La0.5Nd0.5FeO3复合材料中石榴石和钙钛矿相的协同结构集成优化了铁电和磁电耦合

IF 7.7 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications

Pub Date : 2026-02-01 DOI: 10.1016/j.coco.2026.102740

Laxmikant M. Patange , Pramod D. Mhase , Varsha C. Pujari , Ram A. Pawar , Sagar E. Shirsath , Santosh S. Jadhav , Sunil M. Patange

Phase-coexistent (1–x)Eu₃Fe₅O₁₂–(x)La_0.5Nd_0.5FeO₃ (EIG–LNF) composites (x = 0.00, 0.25, 0.50, 0.75, 1.00) were synthesized via a sol–gel auto-combustion route to investigate the influence of garnet–perovskite phase integration on ferroelectric and magnetoelectric performance. X-ray diffraction confirmed the coexistence of cubic garnet (Ia3d) and orthorhombic perovskite (Pbnm) phases with tunable phase fractions. Microstructural analysis revealed homogeneous grain morphology with grain sizes increasing from 1.52 μm to 2.55 μm with increasing perovskite content. FTIR and Raman spectroscopy verified the coexistence of characteristic vibrational modes from both phases, accompanied by systematic red shifts indicative of interfacial strain. XPS analysis confirmed mixed valence states of Eu²⁺/Eu³⁺ and Fe²⁺/Fe³⁺, supporting strong interfacial coupling. Ferroelectric measurements exhibited slim P–E hysteresis loops, with the intermediate composition (x = 0.50) showing reduced coercive field (1.41 kV cm⁻¹) and moderate saturation polarization (0.028 μC cm⁻²), indicating optimized dipolar dynamics. Notably, Magnetoelectric measurements revealed a maximum coupling coefficient (α_ME ≈ 16.20 mV/cm-Oe) at x = 0.50, attributed to enhanced strain-mediated interactions and maximized phase connectivity. The results demonstrate that compositional tuning in EIG–LNF composites enables synergistic integration of garnet and perovskite functionalities, making them promising candidates for sensors, transducers, spintronic devices, and energy-harvesting applications.

采用溶胶-凝胶自燃烧法合成了相共存（1-x） eu3fe5012 - (x)La0.5Nd0.5FeO3 （eg - lnf）复合材料（x = 0.00, 0.25, 0.50, 0.75, 1.00），研究了石榴石-钙钛矿相集成对铁电和磁电性能的影响。x射线衍射证实了立方石榴石（Ia3d）和正交钙钛矿（Pbnm）相共存，相分数可调。随着钙钛矿含量的增加，晶粒尺寸从1.52 μm增大到2.55 μm，晶粒形貌均匀。FTIR和拉曼光谱证实了两相的特征振动模式共存，并伴有表明界面应变的系统红移。XPS分析证实了Eu2+/Eu3+和Fe2+/Fe3+的混合价态，支持强界面耦合。铁电测量显示出纤细的P-E磁滞回线，中间成分（x = 0.50）显示出较低的矫顽力场（1.41 kV cm−1）和中等的饱和极化（0.028 μC cm−2），表明优化的偶极动力学。值得注意的是，磁电测量显示，在x = 0.50时，耦合系数最大（αME≈16.20 mV/cm-Oe），这归因于应变介导的相互作用增强和相连接最大化。结果表明，egg - lnf复合材料的成分调谐可以实现石榴石和钙钛矿功能的协同集成，使其成为传感器、换能器、自旋电子器件和能量收集应用的有希望的候选者。

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引用次数: 0

Principal stress-aligned continuous fiber routing in octet truss structures: Process and mechanical validation 八元桁架结构中主应力对准连续纤维布线：工艺和力学验证

IF 7.7 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications

Pub Date : 2026-02-01 DOI: 10.1016/j.coco.2026.102733

Nithin Kaliyath Parambil , Kaiyue Deng , Kelvin Fu

Architected lattice structures such as the octet truss offer high stiffness and strength per unit weight due to their stretch-dominated, geometry-driven behavior. Traditional fabrication methods rely on metals or short-fiber composites, which suffer from fiber misalignment and weak inter-beam bonding when attempting complex 3D lattices. Continuous fiber composite lattices remain impractical with conventional additive methods because of fiber steering limitations and the need for joints or molds. 3D Fiber Tethering (3DFiT) overcomes these hurdles by robotically guiding single continuous fibers along optimized spatial paths without joints, molds, or layers, enabling seamless octet architectures. This study demonstrates 3DFiT fabrication of continuous carbon-fiber octet-truss structures, evaluates their compressive mechanical response, and compares them to existing metal alloys and various ceramic materials. Results show significantly enhanced stiffness, strength, and energy absorption, underscoring 3DFiT's potential for scalable, high-performance architected composites in demanding structural applications.

结构点阵结构，如八边形桁架，由于其拉伸主导，几何驱动的行为，提供高刚度和单位重量强度。传统的制造方法依赖于金属或短纤维复合材料，当尝试复杂的三维晶格时，这些方法会受到纤维错位和弱束间键合的影响。由于纤维转向的限制和对接头或模具的需求，连续纤维复合材料晶格在传统的添加剂方法中仍然是不切实际的。3D Fiber Tethering （3DFiT）通过机器人引导单个连续纤维沿着优化的空间路径，无需连接、模具或层，从而克服了这些障碍，实现了无缝的八层结构。本研究展示了连续碳纤维八边形桁架结构的3DFiT制造，评估了其压缩力学响应，并将其与现有的金属合金和各种陶瓷材料进行了比较。结果显示，在要求苛刻的结构应用中，3DFiT在可扩展、高性能建筑复合材料方面具有显著增强的刚度、强度和能量吸收能力。

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引用次数: 0

A graph neural network-based computational framework for predicting mechanical behavior of continuous carbon fiber/PEEK composites: from microstructural features to macroscopic applications 预测连续碳纤维/PEEK复合材料力学行为的基于图神经网络的计算框架：从微观结构特征到宏观应用

IF 7.7 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications

Pub Date : 2026-02-01 DOI: 10.1016/j.coco.2026.102742

Zhengqi Ge , Xingzhi Xiao , Haibin Tang

This study presents a multiscale computational framework integrating physics-based finite element analysis (FEA) and graph neural network (GNN)-based deep learning to evaluate the mechanical performance of fused deposition modeled (FDMed) continuous carbon fiber-reinforced polyetheretherketone (CCF/PEEK) composites. The proposed framework bridges the gap between materials science theory and manufacturing applications by efficiently correlating microstructural attributes with macroscopic properties. At the microscale, representative volume element (RVE) simulations of FDMed CCF/PEEK filaments are performed to generate stress-strain data across varying fiber volume fractions and random distributions. These RVE models are transformed into graph structures based on fiber positions and K-nearest neighbor connections, enabling a graph attention network (GAT) to learn microstructure-mechanical response relationships. At the macroscale, X-ray computed tomography (XCT)-derived filament geometry and temperature-dependent constitutive relations are employed in FEA to simulate composite behavior across a broad temperature range (23–230 °C). A dual-branch neural network architecture, combining a temperature-aware GNN and a multilayer perceptron (MLP), is developed to concurrently predict fracture strain and complete stress-strain responses. Results demonstrate that the framework effectively captures the multiscale mechanical behavior of FDMed CCF/PEEK composites, offering a robust tool for performance evaluation and optimization in additive manufacturing applications.

本研究提出了一个多尺度计算框架，结合基于物理的有限元分析（FEA）和基于图神经网络（GNN）的深度学习，来评估熔融沉积模型（FDMed）连续碳纤维增强聚醚醚酮（CCF/PEEK）复合材料的力学性能。所提出的框架通过有效地将微观结构属性与宏观特性相关联，弥合了材料科学理论与制造应用之间的差距。在微观尺度上，对FDMed CCF/PEEK长丝进行了代表性的体积元（RVE）模拟，以生成不同纤维体积分数和随机分布的应力应变数据。这些RVE模型被转换成基于纤维位置和k近邻连接的图结构，使图注意网络（GAT）能够学习微观结构-力学响应关系。在宏观尺度上，采用x射线计算机断层扫描（XCT）衍生的细丝几何和温度相关的本构关系在有限元分析中模拟复合材料在宽温度范围（23-230°C）内的行为。结合温度感知的GNN和多层感知器（MLP），开发了一种双分支神经网络架构，可以同时预测断裂应变和完整的应力-应变响应。结果表明，该框架有效地捕获了FDMed CCF/PEEK复合材料的多尺度力学行为，为增材制造应用中的性能评估和优化提供了强大的工具。

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引用次数: 0

Efficient electromagnetic wave absorption of porous 3D heterogeneous composites based on Fe3O4 / waste–tyre–recycled carbon black (RCB) hybrids 基于Fe3O4 /废轮胎-再生炭黑（RCB）杂化材料的多孔三维非均相复合材料的高效电磁波吸收

IF 7.7 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications

Pub Date : 2026-01-20 DOI: 10.1016/j.coco.2026.102728

Qirui Sun , Yuqi Zhai , Zhongyi Li , Xin Ye , Liqun Zhang , Yongpeng Wang

In response to the urgent need for sustainable waste tire management, this study employs pyrolyzed recycled carbon black (RCB) as a functional building block to construct a 3D multi–interface heterogeneous RCB/Fe₃O₄ porous framework architecture via a facile hydrothermal method, thereby achieving high–value conversion of waste resources. Benefiting from its high specific surface area and multi–component ash–rich structure, RCB effectively anchors Fe³⁺/Fe²⁺ ions and promotes the in situ formation of Fe₃O₄ crystal nuclei. By adjusting the RCB content, controlled growth of Fe₃O₄ nanoparticles, precise construction of heterogeneous interfaces, and systematic optimization of electromagnetic properties were accomplished. The Key synergistic advantages include: The key synergistic advantages include: (i) protection of Fe₃O₄ formation and suppression of aggregation enabled by intrinsic SiO₂ sites and the multi–interface structure; (ii) enhancement of magnetic loss contributed by the irregular morphology of RCB; (iii) optimization of electromagnetic parameters through the synergistic interaction among Fe₃O₄, ash-rich RCB, and the 3D porous framework, resulting in superior impedance matching. The composite provides multiple electromagnetic wave transmission paths, while its high surface area and localized defects strengthen interfacial/dipole polarization losses. Furthermore, interconnected RCB microspheres establish an efficient conductive network, thereby enhancing conductive loss. These multi-scale synergies yield exceptional microwave absorption: a minimum reflection loss of −40 dB at 2.5 mm thickness and a maximum effective absorption bandwidth of 3.22 GHz at 1.5 mm thickness. This work provides a new strategy for the high–value resource utilization of waste tire-derived pyrolytic carbon black and demonstrates its potential application in high-performance electromagnetic wave absorption materials.

针对废旧轮胎可持续管理的迫切需求，本研究以热解再生炭黑（RCB）为功能构件，通过简便的水热法构建了三维多界面非均相RCB/Fe3O4多孔框架结构，实现了废旧资源的高价值转化。RCB具有高比表面积和多组分富灰分结构，能有效锚定Fe3+/Fe2+离子，促进Fe3O4晶核的原位形成。通过调节RCB含量，实现了Fe3O4纳米颗粒的生长控制、非均相界面的精确构建和电磁性能的系统优化。主要的协同优势包括：(1)保护了Fe3O4的形成，抑制了SiO2固有位点和多界面结构的聚集；（ii） RCB不规则形貌导致磁损失增强；（iii）通过Fe3O4、富灰RCB和三维多孔框架之间的协同作用优化电磁参数，从而获得更好的阻抗匹配。该复合材料提供了多种电磁波传输路径，而其高表面积和局部缺陷增强了界面/偶极子极化损失。此外，相互连接的RCB微球建立了一个高效的导电网络，从而增加了导电损耗。这些多尺度协同作用产生了卓越的微波吸收：在2.5 mm厚度时，最小反射损耗为- 40 dB，在1.5 mm厚度时，最大有效吸收带宽为3.22 GHz。本研究为废轮胎热解炭黑的高价值资源化利用提供了新策略，并展示了其在高性能电磁波吸收材料中的应用潜力。

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引用次数: 0

Natural polyphenol-mediated graphene oxide paper featuring ultrasensitive and longer-lasting fire sensing 天然多酚介导的氧化石墨烯纸具有超灵敏和更持久的火灾感应

IF 7.7 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications

Pub Date : 2026-01-20 DOI: 10.1016/j.coco.2026.102725

Xin Tan , Yueyan Wang , Xiaoqian Jiao , Pingfan Xu , Ao Ding , Peikun Zhang , Yaofa Luo

Emerging intelligent fire alarm systems (FAS) based on thermo-sensitive nanomaterials have garnered growing attention in fire detection field. However, designing FAS with mechanical flexibility, environmental durability, flame resistance, sensitive temperature responsiveness, and long-lasting fire alarming period is crucial but still challenging. Herein, we demonstrate a nacre-mimetic, polyphenol-mediated strategy to fabricate ternary hybrid nanocomposite by utilizing graphene oxide (GO) as conductive network, phosphorus-nitrogen rich hexaaminocyclotriphosphazene (HACP) as flame retardant unit, and bio-based tannic acid (TA) as a multifunctional interfacial mediator. The strong multi-modal interactions among GO, HACP and TA create a hierarchically crosslinked laminated architecture for TA-GO/HACP nanocomposite, achieving 2.86 and 6.53 times improvement in tensile strength and toughness compared to pure GO paper, respectively, coupled with superior structural stability. Furthermore, the TA-GO/HACP nanocomposite possesses competitive combinations of high flame retardancy, ultra-fast fire alarm response time (∼0.4 s), ultra-long continuous fire alarming time (> 1200 s), and sensitive high-temperature response time (∼5 s at 250 °C), highlighting the reliable early fire-warning capabilities and potential real-world applications. This work paves an avenue to design high-performance FAS materials for next-generation fire detection technologies.

基于热敏纳米材料的新型智能火灾报警系统在火灾探测领域受到越来越多的关注。然而，设计具有机械灵活性、环境耐久性、阻燃性、敏感的温度响应性和持久的火灾报警时间的FAS至关重要，但仍然具有挑战性。在此，我们展示了一种模拟纳米、多酚介导的策略，利用氧化石墨烯（GO）作为导电网络，富磷氮六氨基环三磷腈（HACP）作为阻燃单元，生物基单宁酸（TA）作为多功能界面介质，制备三元杂化纳米复合材料。氧化石墨烯、HACP和TA之间的强多模态相互作用为TA-GO/HACP纳米复合材料创造了层次交联的层状结构，与纯氧化石墨烯纸相比，其拉伸强度和韧性分别提高了2.86倍和6.53倍，同时具有优异的结构稳定性。此外，TA-GO/HACP纳米复合材料具有高阻燃性，超快速火灾报警响应时间（~ 0.4 s），超长连续火灾报警时间（> 1200 s）和敏感的高温响应时间（250°C时~ 5 s）的竞争组合，突出了可靠的早期火灾报警能力和潜在的实际应用。这项工作为设计用于下一代火灾探测技术的高性能FAS材料铺平了道路。

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引用次数: 0

Effects of sizing agents on the interfacial heat resistance of CF/PEKK composites 施胶剂对CF/PEKK复合材料界面耐热性的影响

IF 7.7 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications

Pub Date : 2026-01-19 DOI: 10.1016/j.coco.2026.102723

Wang Zhang , Chun Yan , Yingdan Zhu , Bowen Zhang , Dong Liu , Haibing Xu , Gang Chen , Yunpeng Xu

The interfacial heat resistance of carbon fiber reinforced polyether ketone ketone (CF/PEKK) composites plays a critical role in their high-temperature applications. In this study, polyetherimide (PEI), polysulfone (PSF) and polyethersulfone (PES) resins were selected as sizing agents for carbon fibers to investigate their effects on the interfacial heat resistance of CF/PEKK composites. Results show that all three sizing resins possess high thermal stability suitable for CF/PEKK composite processing and effectively enhance the interfacial shear strength (IFSS). PEI resin exhibited the best compatibility with the PEKK matrix. The PEI-sized CF/PEKK composites achieved the highest interfacial properties, with an IFSS value of 100.5 MPa, representing a 26.6 % improvement over desized composites. Analysis of interfacial heat resistance further revealed that composites modified with 1 wt% PEI retained the highest IFSS of 74.4 MPa at 140 °C, which is 31.7 % higher than that of desized composites under the same conditions. This enhancement primarily stems from the good compatibility and high heat resistance, which simultaneously improve the interfacial adhesion strength and thermal stability of CF/PEKK composites. These advantages help broaden the application prospects of CF/PEKK composites in high-temperature environments.

碳纤维增强聚醚酮酮（CF/PEKK）复合材料的界面耐热性能是其高温应用的关键。本研究选择聚醚酰亚胺（PEI）、聚砜（PSF）和聚醚砜（PES）树脂作为碳纤维的施胶剂，研究了它们对CF/PEKK复合材料界面耐热性的影响。结果表明，三种施胶树脂均具有较高的热稳定性，适合CF/PEKK复合加工，并能有效提高界面剪切强度。PEI树脂与PEKK基质的相容性最好。pei -size的CF/PEKK复合材料具有最高的界面性能，IFSS值为100.5 MPa，比desize复合材料提高了26.6%。界面热阻分析进一步表明，在140℃时，添加1 wt% PEI改性的复合材料的IFSS最高，为74.4 MPa，比同等条件下的去浆复合材料高31.7%。这种增强主要源于良好的相容性和较高的耐热性，同时提高了CF/PEKK复合材料的界面粘接强度和热稳定性。这些优点有助于拓宽CF/PEKK复合材料在高温环境中的应用前景。

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引用次数: 0