Composites Science and Technology最新文献_第8页

Process–structure–property relation for elastoplastic behavior of polymer nanocomposites with agglomerates and interfacial gradients 具有团聚体和界面梯度的聚合物纳米复合材料弹塑性行为的工艺-结构-性能关系

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

Composites Science and Technology

Pub Date : 2025-11-06 DOI: 10.1016/j.compscitech.2025.111435

Prajakta Prabhune , Anlan Chen , Yigitcan Comlek , Wei Chen , L. Catherine Brinson

Polymer nanocomposites, inherently tailorable materials, are potentially capable of providing higher strength to weight ratio than conventional hard metals. However, their disordered nature makes processing control and hence tailoring properties to desired target values a challenge. Additionally, the interfacial region, also called the interphase, is a critical material phase in these heterogeneous materials and its extent depends on variety of microstructure features like particle loading and dispersion or inter-particle distances. Understanding process–structure–property (PSP) relation can provide guidelines for process and constituents’ design. Our work explores nuances of PSP relation for polymer nanocomposites with attractive pairing between particles and the bulk polymer. Past works have shown that particle functionalization can help tweak these interactions in attractive or repulsive type and can cause slow or fast decay of stiffness properties in polymer nanocomposites. In this work, we develop a material model that can represent decay for small strain elastoplastic (Young’s modulus and yield strength) properties in interfacial regions and simulate representative or statistical volume element behavior. The interfacial elastoplastic material model is devised by combining local stiffness and glass transition measurements from atomic force microscopy and fluorescence microscopy. This model is combined with a microstructural design of experiments for agglomerated nanocomposite systems. Agglomerations are particle aggregations arising from processing artifacts. Twin screw extrusion process can reduce extent of aggregation in hot pressed samples via erosion or rupture depending on screw rpms and torque. We connect this process–structure relation to structure–property relation that emerges from our study. We discover that balancing between local stress concentration zones (SCZ) and interfacial property decay governs how fast yield stress can improve by breaking down agglomeration via erosion. Erosion is relatively more effective in helping improve nanocomposite yield strength. We also observe saturation in properties where incremental increase brought on by erosion is slowed due to increasing SCZ and saturation in interphase percolation.

聚合物纳米复合材料是一种固有的可定制材料，具有比传统硬金属提供更高强度重量比的潜力。然而，它们的无序性使得处理控制和裁剪属性到期望的目标值成为一项挑战。此外，界面区域，也称为界面相，是这些非均质材料中的关键材料相，其程度取决于各种微观结构特征，如颗粒负载和分散或颗粒间距离。理解工艺-结构-性能（PSP）关系可以为工艺和部件的设计提供指导。我们的工作探讨了聚合物纳米复合材料的PSP关系的细微差别，粒子和体聚合物之间有吸引力的配对。过去的研究表明，粒子功能化可以帮助将这些相互作用调整为吸引或排斥类型，并可能导致聚合物纳米复合材料的刚度性能缓慢或快速衰减。在这项工作中，我们开发了一个材料模型，可以表示界面区域的小应变弹塑性（杨氏模量和屈服强度）特性的衰减，并模拟代表性或统计体积元行为。结合原子力显微镜和荧光显微镜的局部刚度和玻璃化转变测量，设计了界面弹塑性材料模型。该模型结合了团聚纳米复合材料体系的微观结构实验设计。聚集是由加工工件产生的粒子聚集。双螺杆挤压工艺可以减少热压样品中因螺杆转速和扭矩不同而产生的侵蚀或破裂的聚集程度。我们将这种过程-结构关系与我们研究中出现的结构-性质关系联系起来。我们发现，局部应力集中区（SCZ）和界面性能衰减之间的平衡决定了通过侵蚀破坏团聚体来提高屈服应力的速度。在提高纳米复合材料屈服强度方面，侵蚀作用相对更有效。我们还观察到，由于侵蚀带来的增量增加由于增加的SCZ和相间渗透的饱和度而减慢了性质的饱和。

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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 : 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

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

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

Composites Science and Technology

Pub Date : 2025-11-05 DOI: 10.1016/j.compscitech.2025.111434

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

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

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

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引用次数: 0

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

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

Composites Science and Technology

Pub Date : 2025-11-04 DOI: 10.1016/j.compscitech.2025.111428

Mingxin Ye , Yabin Deng , Yunsen Hu , Xiaozhi Hu

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

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

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引用次数: 0

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

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

Composites Science and Technology

Pub Date : 2025-11-04 DOI: 10.1016/j.compscitech.2025.111433

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

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

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

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引用次数: 0

Photothermal graphene polyetherimide icephobic surfaces for robust and smart anti-/deicing applications 光热石墨烯聚醚酰亚胺憎冰表面，用于坚固和智能防/除冰应用

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

Composites Science and Technology

Pub Date : 2025-11-03 DOI: 10.1016/j.compscitech.2025.111429

Yiqing Xue , Zengyan Jiang , Lijun Liu , Yubo Wang , Wenyan Liang

The formation of ice poses serious risks to the reliable operation of equipment in cold environments. Here, we propose a novel graphene-polyetherimide icephobic surface (GPIS) that achieves fluorine-free environmental compatibility, structural robustness, and photothermal responsiveness through a one-step fabrication strategy. Unlike conventional approaches relying on fragile coatings or lubricant infusion, our method enables simultaneous structural construction and functional integration without the need for additional surface treatments. Graphene nanosheets are uniformly embedded within the PEI matrix while retaining their π-conjugated structure and crystalline integrity, which endows the surface with excellent broadband light absorption and high in-plane thermal conductivity. Upon light irradiation, the GPIS surface can rapidly reach a temperature of 140 °C, reducing the ice adhesion strength to as low as 20 kPa and enabling fast, passive de-icing without mechanical intervention. More importantly, this GPIS design maintains its superhydrophobicity, self-cleaning performance, and high photothermal responsiveness under extreme thermal, chemical, and mechanical conditions, demonstrating outstanding environmental stability. This study presents an innovative interface design that integrates material chemistry, thermal regulation, and microstructure engineering, providing a new technological foundation for the development of high-performance and durable smart anti-/de-icing systems.

冰的形成对设备在寒冷环境下的可靠运行构成严重威胁。在这里，我们提出了一种新的石墨烯-聚醚酰亚胺憎冰表面（GPIS），通过一步制造策略实现了无氟环境兼容性、结构稳健性和光热响应性。与依赖于易碎涂层或润滑剂注入的传统方法不同，我们的方法可以同时实现结构构建和功能集成，而无需额外的表面处理。石墨烯纳米片均匀嵌入PEI基体内，同时保持π共轭结构和晶体完整性，使其具有优异的宽带光吸收能力和面内热导率。在光照射下，GPIS表面可以快速达到140℃的温度，将冰的粘附强度降低到低至20 kPa，无需机械干预即可实现快速被动除冰。更重要的是，这种GPIS设计在极端的热、化学和机械条件下保持了超疏水性、自清洁性能和高光热响应性，表现出出色的环境稳定性。本研究提出了一种集成材料化学、热调节和微观结构工程的创新界面设计，为开发高性能、耐用的智能防/除冰系统提供了新的技术基础。

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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 : 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

Loofah-inspired cellulose-based super-white aerogel with enhanced mechanical strength for high-performance daytime radiative cooling 丝瓜络启发纤维素为基础的超白色气凝胶，具有增强的机械强度，用于高性能日间辐射冷却

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

Composites Science and Technology

Pub Date : 2025-10-30 DOI: 10.1016/j.compscitech.2025.111421

Qian Zhao , Tao Hai , Xiaoming Peng , Xuejie Yue , Tao Zhang , Yuqi Li , Dongya Yang , Fengxian Qiu

Radiative cooling materials constructed from sustainable sources are gaining traction in passive radiative cooling (PRC) research. Cellulose offers unique benefits such as abundance, biodegradability, and renewability, positioning it as a promising candidate, however low mechanical strength and solar absorption restrict its applications. Here, an innovative interfacial engineering inspired by loofah is proposed to construct a sustainable, super-white, and durable high-performance cellulose-based aerogel. This is achieved by bottom-up assembly of sulfonated nanocellulose and silica sol into a 3D loofah-mimicking structure with interconnected nodes via freeze-drying. Benefiting from the interconnected nodes, the aerogel exhibits robust mechanical properties, capable of withstanding a tensile stress equivalent to 150,000 times its own weight and enduring 30 compression cycles without deformation. Sulfonation of cellulose reduces absorption in the near-infrared region, and the internal multiscale fibers of aerogel enhance sunlight scattering, resulting in a high solar reflectivity (97.6 %). The cellulose acts as a thermal emitter with 96.6 % mid-infrared (MIR) emissivity. Combined with an ultralow thermal conductivity (31.96 mW m⁻¹ k⁻¹), it achieves a remarkable cooling effect with an average dT of 12.5 °C. Hydrophobic modification endows it self-cleaning of environmental dust and resistance to rainwater scouring. Notably, the renewable raw material sources, coupled with biodegradability in soil after disposal, provide distinctive sustainability across its entire life cycle. This work can afford fresh perspectives on the design and development of advanced cellulose-based aerogels for PRC applications.

在被动辐射冷却（PRC）的研究中，可持续来源的辐射冷却材料越来越受到关注。纤维素具有丰富、可生物降解和可再生等独特的优点，使其成为一种有前途的候选材料，但低机械强度和太阳能吸收限制了它的应用。本文以丝瓜为灵感，提出了一种创新的界面工程，构建一种可持续、超白、耐用的高性能纤维素基气凝胶。这是通过将磺化纳米纤维素和硅溶胶自下而上地组装成三维丝瓜模拟结构，通过冷冻干燥实现节点互联。得益于相互连接的节点，气凝胶表现出强大的机械性能，能够承受相当于自身重量150,000倍的拉伸应力，并承受30次压缩循环而不变形。纤维素的磺化降低了近红外区的吸收，气凝胶内部的多尺度纤维增强了太阳光的散射，从而获得了较高的太阳反射率（97.6%）。纤维素作为热发射器具有96.6%的中红外（MIR）发射率。结合超低导热系数（31.96 mW m−1 k−1），它达到了显著的冷却效果，平均dT为12.5°C。疏水改性使其具有自洁环境粉尘和抗雨水冲刷能力。值得注意的是，可再生的原料来源，加上处理后土壤的可生物降解性，在其整个生命周期中提供了独特的可持续性。这项工作为设计和开发用于PRC的先进纤维素基气凝胶提供了新的视角。

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引用次数: 0

Hydroxylated MXene as a nano-binder: Concurrently strengthening interfaces and toughening matrix in carbon fiber/epoxy composites 羟基化MXene作为纳米粘结剂：碳纤维/环氧复合材料界面强化和基体增韧

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

Composites Science and Technology

Pub Date : 2025-10-30 DOI: 10.1016/j.compscitech.2025.111426

Yi Hu , Ye Liu , Chao Cui , Wei Cai , Chunhao Ma , Rong Min , Anwen Wang , Yan Yang , Shuang Zhang , Jianjun Jiang

Enhancing interfacial properties in carbon fiber reinforced polymer (CFRP) composites is challenging due to the trade-off between interfacial strength and matrix toughness. This study introduces hydroxylated MXene (h-MXene) as a nano-reinforcement that addresses this limitation through dual-phase strengthening mechanisms. Surface hydroxylation converts pristine MXene nanosheets into interconnected fibrous networks with improved dispersibility and bonding capability. XPS and FTIR analysis confirm that hydroxyl functionalization enables hydrogen bonding with epoxy matrices, while SEM and TEM reveal gradient interphase formation. In neat epoxy, 0.1 wt% h-MXene achieves 46.4 % tensile strength and 27 % flexural strength improvements, compared to 21.4 % and 8.3 % for pristine MXene. In CFRP laminates, h-MXene modification yields 52.9 % flexural strength and 40 % interlaminar shear strength enhancements. Fractography analysis showed transition from adhesive to cohesive failure, confirming enhanced fiber-matrix interfacial adhesion. These results demonstrate that hydroxyl-functionalized MXenes provide effective nano-scale reinforcement through engineered surface chemistry that enables concurrent interface strengthening and matrix toughening, providing an effective approach for CFRP reinforcement at low filler concentrations.

提高碳纤维增强聚合物（CFRP）复合材料的界面性能是一项具有挑战性的工作，因为它需要在界面强度和基体韧性之间进行权衡。本研究引入羟基化MXene （h-MXene）作为纳米增强剂，通过双相强化机制解决了这一限制。表面羟基化将原始的MXene纳米片转化为相互连接的纤维网络，具有更好的分散性和键合能力。XPS和FTIR分析证实羟基功能化使环氧基与环氧基体形成氢键，而SEM和TEM显示梯度间相形成。在纯环氧树脂中，0.1 wt% h-MXene的抗拉强度提高46.4%，弯曲强度提高27%，而原始MXene的抗拉强度提高21.4%，弯曲强度提高8.3%。在CFRP层压板中，h-MXene改性可提高52.9%的弯曲强度和40%的层间剪切强度。断口形貌分析表明，纤维与基体界面的黏附性增强，从粘结状态向粘结状态转变。这些结果表明，羟基功能化的MXenes通过工程表面化学提供了有效的纳米级增强，可以同时实现界面强化和基体增韧，为低填料浓度的CFRP增强提供了有效的方法。

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引用次数: 0

Interlaminar damage evolution in CF/PPESK composites: Interactive effects of fiber layup angles and temperature CF/PPESK复合材料层间损伤演化：纤维铺层角度和温度的交互影响

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

Composites Science and Technology

Pub Date : 2025-10-28 DOI: 10.1016/j.compscitech.2025.111427

Liangliang Shen , Shi Su , Xin Zhou , Tianqi Zhu , Fang Qi , Zhiyuan Ning , Xigao Jian , Jian Xu

Studies on the mechanical behavior and failure mechanisms of continuous carbon fiber-reinforced poly(phthalazinone ether sulfone ketone) (CF/PPESK) composites with different lay-up configurations remain limited, especially regarding interlaminar failure over wide temperatures. This study combined multiscale experiments and finite element analysis to investigate the effect of ply orientation on shear resistance of CF/PPESK laminates from 293 to 503 K. The results indicate that with variations in fiber orientation and temperature, the shear strength of the [0]_s, [0,90]_s, and [0,45,0,–45]_s laminated composites exhibit significant differences, ranging from 92.6 % to 143.5 %. This difference gradually diminishes under elevated temperature conditions. Moreover, at 503 K, the [0,45,0,–45]_s laminate exhibits a transition in failure mode, where the interaction between temperature and ply configuration leads to a transient enhancement of interlaminar load-bearing capacity. A combined approach of X-ray computed tomography (CT) and pixel threshold-based image recognition was employed to further quantitatively investigate the initiation and propagation trends of interlaminar cracks in composite laminates under SBS loading. Integrating experimental damage observations with numerical crack evolution, a novel damage assessment framework incorporating temperature, ply configuration, and delamination evolution was established, providing a new perspective for process optimization and damage behavior research in both thermoplastic and thermoset composites.

不同铺层构型的连续碳纤维增强聚酞嗪酮/聚砜酮复合材料（CF/PPESK）的力学行为和破坏机制的研究仍然有限，特别是关于宽温度下层间破坏的研究。本研究采用多尺度实验和有限元分析相结合的方法，研究了在293 ~ 503 K范围内，CF/PPESK层合板的铺层取向对其抗剪性能的影响。结果表明：随着纤维取向和温度的变化，[0]s、[0,90]s和[0,45,0，-45]s层合复合材料的抗剪强度差异显著，在92.6% ~ 143.5%之间；这种差异在高温条件下逐渐减小。此外，在503 K时，[0,45,0，-45]s层板呈现出破坏模式的转变，温度和层板结构之间的相互作用导致层间承载能力的短暂增强。采用x射线计算机断层扫描（CT）和基于像素阈值的图像识别相结合的方法，进一步定量研究了SBS加载下复合材料层间裂纹的起裂和扩展趋势。将实验损伤观察与数值裂纹演化相结合，建立了一种包含温度、层位和分层演化的新型损伤评估框架，为热塑性和热固性复合材料的工艺优化和损伤行为研究提供了新的视角。

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引用次数: 0