Composites Part A: Applied Science and Manufacturing最新文献_第2页

Recycling flax fibre composites by using a chemical solvolysis process in near- and supercritical conditions: linking fibre integrity to micro-mechanical performance 在超临界和超临界条件下使用化学溶剂溶解工艺回收亚麻纤维复合材料：将纤维完整性与微机械性能联系起来

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-01-21 DOI: 10.1016/j.compositesa.2026.109595

Coralie Buffet , Jing Wang , Sylvie Durand , Anthony Magueresse , Cyril Aymonier , Alain Bourmaud

The growing demand for bio-based composites has intensified the need for efficient recycling strategies that preserve fibre integrity and reduce environmental impact. In this study, unidirectional flax-reinforced composites with epoxy and poly-amide 11 (PA 11) matrices are manufactured and subsequently recycled using a solvolysis-recycling based process under near- and supercritical conditions in a semi-continuous flow reactor. A water/ethanol mixture (50/50 in mol) is employed as solvent at 250°C and 300°C under 250 bar. The recovered flax fibres are characterised using scanning electron microscopy (SEM), nanoindentation (NI) and atomic force microscopy (AFM). Mechanical tests on the original composites demonstrate tensile properties consistent with the best values reported in the literature, supported by low porosity levels (∼2%). After solvolysis, flax fibres recovered from PA 11 composites exhibit clean surfaces, preserved cell wall organisation, and nano-mechanical properties close to virgin fibres. In contrast, fibres from epoxy composites experience substantial degradation, especially at 300°C, with pronounced ultrastructural damage and a 65.8% reduction in indentation modulus. AFM confirms localised degradation patterns and lumen-driven damage pathways. These results highlight the superior recyclability of Flax – PA 11 systems and the intrinsic limitations of Flax – Epoxy composites for fibre-preserving solvolysis. Overall, the study provides composite manufacturers and recyclers with new insights into fibre-scale degradation mechanisms and supports the development of more circular, eco-efficient bio-composite architectures.

对生物基复合材料日益增长的需求加强了对有效回收策略的需求，以保持纤维的完整性并减少对环境的影响。在这项研究中，用环氧树脂和聚酰胺11 （pa11）基质制造了单向亚麻增强复合材料，随后在半连续流反应器中使用基于溶剂分解回收的工艺在超临界和超临界条件下进行回收。水/乙醇混合物（50/50 mol）在250°C和300°C 250 bar下作为溶剂。利用扫描电子显微镜（SEM）、纳米压痕（NI）和原子力显微镜（AFM）对回收的亚麻纤维进行了表征。对原始复合材料的力学测试表明，拉伸性能与文献中报道的最佳值一致，并得到低孔隙率（~ 2%）的支持。经过溶剂溶解，从pa11复合材料中回收的亚麻纤维表现出清洁的表面，保留了细胞壁组织，纳米机械性能接近原始纤维。相比之下，环氧树脂复合材料的纤维会经历严重的降解，特别是在300°C时，会出现明显的超微结构损伤，压痕模量降低65.8%。AFM证实了局部降解模式和管腔驱动的损伤途径。这些结果突出了亚麻- PA - 11体系优越的可回收性和亚麻-环氧复合材料在保纤维溶剂分解方面的内在局限性。总的来说，这项研究为复合材料制造商和回收商提供了关于纤维级降解机制的新见解，并支持了更循环、更环保的生物复合材料结构的发展。

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引用次数: 0

Panoramic view of interface-related hygrothermal aging for ramie/PLA composites by time-series decoupling analysis 基于时间序列解耦分析的苎麻/PLA复合材料界面相关湿热老化全景图

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-01-20 DOI: 10.1016/j.compositesa.2026.109591

Lamei Wang , Baozhong Sun , Ming Cai , Bohong Gu

Understanding the interface-related behaviors at the nanoscale is beneficial for controlling the hygrothermal deterioration of plant fiber reinforced composites. This study decoupled the initial water absorption and later matrix hydrolysis at the hygrothermal periods with molecular dynamics simulation. Then, the interfacial tensile properties of ramie fiber reinforced polylactic acid (PLA) composites were revealed with numerical simulation and microscale experiment. Results show that the interfacial moisture invasion increased the displacement of the PLA centroid, and decreased the number of cellulose-PLA hydrogen bonds (HBs) and the PLA-cellulose adhesion work, which led to a decline in interfacial adhesion performance. The interfacial water content was characterized by the thickness of the water layer. The interfacial tensile damage increased at the water_4Å, 6Å, and 8Å interface, while it decreased at the water_2Å interface. After PLA hydrolysis during the later hygrothermal period, the interfacial damage changed from initial adhesion damage (0 % PLA hydrolysis degree) to mixed adhesion-cohesion damage (5 % PLA hydrolysis degree), and then to cohesion damage (15–50 % PLA hydrolysis degree). The cohesive damage percentage was affected by the PLA hydrolysis degree and interfacial damage behavior. The breakage of the cellulose-PLA HBs and PLA-PLA HBs was the tensile-damage behaviors at the aqueous interface and the PLA hydrolysis interface, respectively. The interfacial tensile damage behavior in the MD simulation was observed in the microscale experiment.

在纳米尺度上了解界面相关行为有助于控制植物纤维增强复合材料的湿热劣化。本研究通过分子动力学模拟将初始吸水和后期基质水解解耦。然后，通过数值模拟和微尺度实验揭示了苎麻纤维增强聚乳酸（PLA）复合材料的界面拉伸性能。结果表明：界面水分的侵入增加了PLA质心的位移，减少了纤维素-PLA氢键（HBs）的数量和PLA-纤维素的粘附功，导致界面粘附性能下降；界面含水量由水层厚度表征。界面拉伸损伤在water_4Å、6Å和8Å界面处增大，在water_2Å界面处减小。在后期湿热期PLA水解后，界面损伤由初始黏附损伤（PLA水解度为0%）到黏附-内聚混合损伤（PLA水解度为5%），再到黏附损伤（PLA水解度为15 ~ 50%）。聚乳酸水解程度和界面损伤行为影响黏结损伤率。纤维素-PLA HBs和PLA-PLA HBs的断裂分别表现为水界面和PLA水解界面的拉伸损伤行为。在微尺度实验中观察了MD模拟中界面的拉伸损伤行为。

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引用次数: 0

Flexible positive temperature coefficient composites with low transformation point by constructing 3D polymer skeleton 通过构建三维聚合物骨架，实现低转变点柔性正温度系数复合材料

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-01-20 DOI: 10.1016/j.compositesa.2026.109593

Gui-Lin Song , Jun-Hao Bai , Yu-Tong Qiao , Ling Xu , Run-Pan Nie , Li-Chuan Jia , Ding-Xiang Yan , Zhong-Ming Li

Positive temperature coefficient (PTC) composites are currently employed extensively in various electrical equipment (e.g., power battery, artificial satellite, and optical instrument) due to their self-adaptive temperature control capability. However, it remains challenging to develop PTC composites that can simultaneously achieve high flexibility and low transformation point. Herein, we report the successful fabrication of flexible PTC composites with low transformation point by adopting a 3D interconnected Ecoflex skeleton to support carbon black (CB) and lauric acid (LA) components. The CB@LA/Ecoflex composite with 14 wt% CB content achieves a low room-temperature resistivity of 1.6 Ω·m and a remarkable PTC intensity of 2.5. In addition, the composite reaches a stable equilibrium temperature of ∼ 23.5 ℃ within 600 s, exhibiting a variation of only 0.038 °C when subjected to an ambient temperature of −10 °C and an applied voltages of 30 V. It is also demonstrated that the CB@LA/Ecoflex composites possess excellent flexibility and cyclic stability. This remarkable comprehensive performance demonstrates the promise of the CB@LA/Ecoflex composites in the thermal control of advanced electrical equipment.

正温度系数（PTC）复合材料由于具有自适应温度控制能力，目前广泛应用于各种电气设备（如动力电池、人造卫星和光学仪器）中。然而，如何同时实现高柔韧性和低转变点的PTC复合材料仍是一个挑战。本文报道了采用三维互联Ecoflex骨架支撑炭黑（CB）和月桂酸（LA）组分，成功制备了低转变点柔性PTC复合材料。含有14 wt% CB的CB@LA/Ecoflex复合材料的室温电阻率为1.6 Ω·m， PTC强度为2.5。此外，该复合材料在600秒内达到稳定的平衡温度~ 23.5℃，当环境温度为- 10℃，外加电压为30 V时，其变化仅为0.038℃。结果表明，CB@LA/Ecoflex复合材料具有良好的柔韧性和循环稳定性。这种卓越的综合性能证明了CB@LA/Ecoflex复合材料在先进电气设备热控制方面的前景。

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引用次数: 0

Carbon-carbon composites from polyetherimide matrix precursors via high-pressure stabilization in press (HiPSiP) 聚醚酰亚胺基前驱体高压稳定碳-碳复合材料（HiPSiP）

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-01-20 DOI: 10.1016/j.compositesa.2026.109592

Muhammad H. Shafi, Nicholas Elderfield, Joanna C.H. Wong

Despite the attractively high carbon yields (∼70%) of aromatic thermoplastics, like polyetherimide (PEI), thermoplastic matrix precursors for carbon–carbon composites have seen limited study due to thermal processing challenges. These materials melt during heating, and without containment, deform and lose structural integrity. Another major challenge is gas evolution during stabilization and carbonization, generating voids. This study introduces a new stabilization method, termed high-pressure stabilization in press (HiPSiP), which is performed directly during a compression molding process. After initial molding at 280 °C and 10 MPa for 30 min, the pressure and temperature is ramped up to 100 MPa and 510 °C and held for 1–3 h inside the mold before cooling. After HiPSiP, the matrix no longer exhibits thermoplastic behavior, due to cross-linking of the polymer chains. This prevents distortion and gas-induced decompaction during subsequent carbonization. Carbonized samples reached a density of 1.53 g/cm³ and achieved short beam strength of 28.4 ± 0.6 MPa, one of the highest to the authors’ best knowledge without the use of any densification cycles. Characterization was performed for thermal, microstructural, chemical, and mechanical properties, using thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), optical microscopy, scanning electron microscopy (SEM), powder x-ray diffraction (PXRD), elemental analysis (EA), Fourier transform infrared spectroscopy (FTIR), and short beam strength testing. Comparisons are made against samples stabilized under ambient pressure in air, and non-stabilized samples.

尽管芳香族热塑性塑料（如聚醚酰亚胺（PEI））具有诱人的高碳收率（约70%），但由于热处理方面的挑战，碳-碳复合材料的热塑性基质前体研究有限。这些材料在加热过程中熔化，如果没有密封，就会变形并失去结构完整性。另一个主要挑战是稳定和碳化过程中的气体演化，从而产生空隙。本研究介绍了一种新的稳定方法，称为压力下的高压稳定（HiPSiP），它直接在压缩成型过程中进行。在280°C和10 MPa的初始成型30分钟后，压力和温度上升到100 MPa和510°C，并在冷却前在模具内保持1-3小时。在HiPSiP之后，由于聚合物链的交联，基体不再表现出热塑性行为。这可以防止在随后的碳化过程中变形和气体引起的分解。碳化后的样品密度达到1.53 g/cm3，短束强度达到28.4±0.6 MPa，这是作者所知的最高密度之一，无需使用任何致密化循环。通过热重分析（TGA）、差示扫描量热法（DSC）、光学显微镜、扫描电镜（SEM）、粉末x射线衍射（PXRD）、元素分析（EA）、傅里叶变换红外光谱（FTIR）和短束强度测试，对材料的热、微观结构、化学和力学性能进行了表征。对在空气环境压力下稳定的样品和非稳定的样品进行比较。

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引用次数: 0

The Fe3O4/MWCNT/PMI composite foam with “magnetic–dielectric–porous” ternary synergy achieves efficient electromagnetic wave absorption Fe3O4/MWCNT/PMI复合泡沫具有“磁-介电-多孔”三元协同作用，实现了高效的电磁波吸收

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-01-18 DOI: 10.1016/j.compositesa.2026.109580

Xiongbin Li, Yuqiao Zhou, Xiu-Zhi Tang, Hengfeng Li

The development of lightweight, high-performance electromagnetic wave-absorbing materials with broad bandwidth and strong absorption remains a significant challenge due to the mutual constraints among key performance indicators. In this study, we address the issues of poor mechanical strength, filler sedimentation, and insufficient impedance matching in traditional porous absorbers by designing a novel ternary synergistic system. Utilizing polymethacrylimide (PMI) foam as a three-dimensional scaffold, multi-walled carbon nanotubes (MWCNTs) as a conductive network, and two types of Fe₃O₄ hollow nanospheres synthesized via hydrothermal and solvothermal methods as magnetic loss components, we constructed a “magnetic–dielectric–porous” composite foam. The hollow structure of Fe₃O₄ not only mitigates sedimentation but also promotes multiple internal reflections of electromagnetic waves, thereby enhancing attenuation. Furthermore, UV-initiated polymerization was employed to increase the precursor viscosity, effectively suppressing filler settling during processing. The optimized composite foam (F2MP-15) exhibits an exceptional minimum reflection loss of –61.5 dB at 8.3 GHz and an effective absorption bandwidth covering the entire 2–18 GHz range. Radar cross-section simulations confirm a maximum reduction of 39.7 dB, demonstrating excellent far-field microwave attenuation. This work provides a new strategy for designing lightweight, broadband, and high-strength absorbers through microstructural regulation and synergistic loss mechanisms.

由于关键性能指标之间的相互制约，开发轻质、高性能、宽带宽、强吸收的电磁波吸波材料仍然是一个重大挑战。在这项研究中，我们通过设计一种新的三元协同体系来解决传统多孔吸收剂机械强度差、填料沉降和阻抗匹配不足的问题。以聚甲基丙烯酰亚胺（PMI）泡沫为三维支架，以多壁碳纳米管（MWCNTs）为导电网络，以水热法和溶剂热法合成的两种Fe3O4空心纳米球为磁损组分，构建了“磁-介电-多孔”复合泡沫材料。Fe3O4的中空结构不仅可以减轻沉积，还可以促进电磁波的多次内反射，从而增强衰减。此外，采用紫外光引发聚合提高前驱体粘度，有效地抑制了填料在加工过程中的沉降。优化后的复合泡沫（F2MP-15）在8.3 GHz时具有-61.5 dB的最小反射损耗，有效吸收带宽覆盖整个2-18 GHz范围。雷达截面模拟证实了最大降低39.7 dB，显示出良好的远场微波衰减。这项工作为通过微观结构调节和协同损失机制设计轻量化、宽带和高强度吸收剂提供了新的策略。

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引用次数: 0

In-situ photothermal dual-curing of continuous SiC fiber-reinforced thermoset composite via additive manufacturing and post thermal treatment 连续SiC纤维增强热固性复合材料的增材制造和后热处理原位光热双固化

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-01-18 DOI: 10.1016/j.compositesa.2026.109589

Ruikang Zhai , Jianzhong Chai , Chen Liang , Fang Li , Zihan Li , Jihong Zhu , Biao Zhang , Shangqin Yuan

Additive manufacturing (AM) of continuous fiber-reinforced composites enables the fabrication of lightweight and complex structures. However, only a few AM techniques can directly fabricate ceramic fiber–reinforced polymer composites, especially for continuous silicon carbide (SiC) fiber bundles, because SiC fiber bundles are brittle and break under the friction and tensile conditions of AM. Therefore, photothermally cured thermoset resins are proposed to be blended with SiC fiber bundles in in-situ impregnation and cured through a layer-by-layer manner. This study proposes a photothermal dual curing strategy integrating synchronized ultraviolet–infrared irradiation for the in-situ curing of SiC fiber–reinforced thermoset composites. The custom-built printing system used in this work can achieve stable fiber deposition and uniform cross-linking without molds or prepregs, as well as overcome poor impregnation and fiber–matrix interfacial defects. The process–structure–performance mapping of this novel process reveals a suitable strategy for balancing precision and efficiency. Post-curing reconstructs the cross-linked network, significantly enhancing stiffness and reducing energy dissipation. This work establishes a scalable route for the rapid fabrication of SiC composites with tunable fiber volume fraction ranging from 15% to 52%. This method provides a practical pathway for the fabrication of ceramic fiber–reinforced polymer composites and SiC ceramic green body with considerable potential advanced aerospace, thermal protection, and electromagnetic stealth applications.

连续纤维增强复合材料的增材制造（AM）使轻质复杂结构的制造成为可能。然而，只有少数增材制造技术可以直接制造陶瓷纤维增强聚合物复合材料，特别是连续碳化硅（SiC）纤维束，因为SiC纤维束在增材制造的摩擦和拉伸条件下脆性断裂。因此，提出将光热固化的热固性树脂与SiC纤维束原位浸渍共混，并采用逐层固化的方式进行固化。本研究提出了一种同步紫外-红外辐照的光热双固化策略，用于原位固化碳化硅纤维增强热固性复合材料。本工作中使用的定制打印系统可以实现稳定的纤维沉积和均匀的交联，无需模具或预浸料，并且克服了浸渍不良和纤维-基质界面缺陷。该新工艺的工艺-结构-性能映射揭示了一种平衡精度和效率的合适策略。固化后重建交联网络，显著提高刚度，降低能耗。这项工作为快速制造具有可调纤维体积分数范围为15%至52%的SiC复合材料建立了可扩展的路线。该方法为陶瓷纤维增强聚合物复合材料和碳化硅陶瓷绿色体的制备提供了一条切实可行的途径，在先进的航空航天、热防护和电磁隐身等领域具有相当大的应用潜力。

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引用次数: 0

Damage monitoring of GFRP laminates via electrical measurements: Experiments and predictions 玻璃钢层压板的电气测量损伤监测：实验与预测

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-01-17 DOI: 10.1016/j.compositesa.2026.109588

A. Gazzola , P.A. Carraro , D. Gibhardt , M. Walter , B. Fiedler , M. Quaresimin , M. Zappalorto

In this work, an experimental investigation is presented on the early-stage fatigue damage of conductive glass/epoxy cross-ply laminates. The study is specifically designed to generate a comprehensive and consistent experimental dataset suitable for the validation of an analytical model previously developed by the authors.

Fatigue tests were performed under controlled loading conditions, while transverse matrix cracking in the 90° plies was continuously monitored together with stiffness degradation and changes in electrical resistance. These measurements provide a detailed dataset that enables correlation between mechanical damage and electrical response. The data were then used to validate the analytical model developed by the authors, which predicts stiffness degradation as a function of the resistance change induced by transverse cracking.

The good agreement between model predictions and experimental observations confirms the suitability of the adopted experimental approach and supports the use of electrical resistance measurements as a quantitative tool for model-based assessment of early-stage damage in conductive GFRP laminates.

本文对导电玻璃/环氧树脂交叉层合板的早期疲劳损伤进行了实验研究。该研究旨在生成一个全面和一致的实验数据集，适用于验证作者先前开发的分析模型。在可控载荷条件下进行疲劳试验，同时连续监测90°层的横向基体开裂、刚度退化和电阻变化。这些测量提供了一个详细的数据集，可以实现机械损伤和电气响应之间的相关性。这些数据随后被用于验证作者开发的分析模型，该模型预测刚度退化是横向开裂引起的阻力变化的函数。模型预测和实验观察之间的良好一致性证实了所采用的实验方法的适用性，并支持将电阻测量作为基于模型的导电玻璃钢层合板早期损伤评估的定量工具。

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引用次数: 0

3D printed shape memory polyimide composite aerogels with CNT-directed thermal networks for rapid shape recovery 3D打印形状记忆聚酰亚胺复合气凝胶与碳纳米管定向热网络快速形状恢复

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-01-17 DOI: 10.1016/j.compositesa.2026.109586

Le Li, Xiang Wang, Chun Huang, Wei Chen, Ji Shi, Jian Meng, Tianxi Liu

Shape memory polyimide aerogels have attracted growing interest for aerospace applications due to their ultralight weight, high thermal stability, and programmable shape recovery behavior. However, their practical application remains limited due to the lack of fabrication methods capable of producing complex, customized architectures and the inherently low thermal conductivity that hinders efficient heat transfer and delays shape recovery. In this study, we report a direct ink writing (DIW) strategy to fabricate high-performance shape memory polyimide/carbon nanotube composite aerogels (PCCAs) that simultaneously address both issues. By tailoring the ratio of polyamic acid (PAA) to carbon nanotubes (CNTs), the composite ink achieves balanced rheological properties through hydrogen bonding and π-π interactions, enabling smooth extrusion and high-fidelity printing. During the DIW process, shear forces induce the alignment of CNTs along the printing path, constructing a three-dimensional, continuous thermal conduction network within the aerogel. This significantly enhances heat transfer efficiency and accelerates the shape recovery response. Meanwhile, the DIW approach allows for the programmable construction of aerogels with complex and application-specific architectures. The resulting PCCA exhibits rapid shape recovery, excellent shape fixity (∼94.2%), and recovery ratios (∼96.9%). This work offers a robust platform for designing next-generation adaptive materials for aerospace and beyond.

形状记忆聚酰亚胺气凝胶由于其超轻、高热稳定性和可编程的形状恢复行为，在航空航天应用中引起了越来越多的兴趣。然而，由于缺乏能够生产复杂定制结构的制造方法，以及固有的低导热性阻碍了有效的传热和延迟形状恢复，它们的实际应用仍然受到限制。在这项研究中，我们报告了一种直接墨水书写（DIW）策略来制造高性能形状记忆聚酰亚胺/碳纳米管复合气凝胶（PCCAs），同时解决了这两个问题。通过调整聚酰胺酸（PAA）与碳纳米管（CNTs）的比例，复合油墨通过氢键和π-π相互作用实现了平衡的流变特性，从而实现了平滑挤压和高保真打印。在DIW过程中，剪切力诱导碳纳米管沿打印路径排列，在气凝胶内构建三维连续导热网络。这大大提高了传热效率，加快了形状恢复响应。同时，DIW方法允许具有复杂和特定应用架构的可编程气凝胶结构。所得的PCCA具有快速的形状恢复、优异的形状固定性（~ 94.2%）和回收率（~ 96.9%）。这项工作为设计下一代航空航天及其他领域的自适应材料提供了一个强大的平台。

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引用次数: 0

Enhance interfacial bonding of glass-fiber-reinforced PPS resistance welded joints: mechanisms of surface modification on Ti mesh heating element and ultrasonic assistance 增强玻璃纤维增强PPS电阻焊接接头界面结合：钛网加热元件表面改性及超声辅助机理

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-01-16 DOI: 10.1016/j.compositesa.2026.109587

Zhiwu Xu , You Wu , Zhongwei Ma , Junjie Gao , Jiuchun Yan , Zhengwei Li

Weak interfacial bonding between the polymer matrix and the metallic heating element (HE) limits further improvement in the lap shear strength (LSS) of resistance-welded joints of glass fiber-reinforced polyphenylene sulfide (GF/PPS). To address this, pure titanium (Ti) meshes modified by micro-arc oxidation (MAO) and γ-aminopropyltriethoxy silane coupling agent (SCA) coupling agent were used as the HE to establish both micromechanical interlocking and molecular bonding between the dissimilar materials. The MAO process generated TiO₂-based surface layers containing microvoids and tunnel-like structures. Fourier transform infrared spectroscopy (FTIR) revealed that hydrogen bonds formed between the –NH₂ groups of the SCA and the C-S bonds of PPS. Simultaneously, interdiffusion occurred between the polysiloxane layer and PPS, resulting in a molecular chain interdiffusion layer (MCIL) at the bonding interface. Energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) analyses demonstrated a synergistic effect between MAO and SCA: MAO increased the hydroxyl group density on the Ti mesh, facilitating SCA grafting, which subsequently elevated surface free energy and improved the wetting and spreading behavior of PPS. This enhanced both mechanical interlocking and interfacial compatibility. Ultrasonic assistance further intensified the strengthening effects of MAO and SCA. The highest LSS of GF/PPS joints, 27.2 MPa, was achieved using Ti mesh treated with both MAO and SCA, representing the highest reported value to date.

聚合物基体与金属加热元件（HE）之间的弱界面结合限制了玻璃纤维增强聚苯硫醚（GF/PPS）电阻焊接头搭接剪切强度（LSS）的进一步提高。为了解决这一问题，采用微弧氧化（MAO）和γ-氨基丙基三乙氧基硅烷偶联剂（SCA）偶联剂改性纯钛（Ti）网作为HE，在不同材料之间建立微机械联锁和分子键。MAO工艺生成了含有微孔洞和隧道状结构的二氧化钛基表面层。傅里叶变换红外光谱（FTIR）显示，SCA的-NH2基团与PPS的C-S键之间形成了氢键。同时，聚硅氧烷层与PPS之间发生互扩散，在键合界面形成分子链互扩散层（MCIL）。能谱（EDS）、x射线衍射（XRD）和x射线光电子能谱（XPS）分析表明MAO和SCA之间存在协同效应：MAO增加了Ti网上的羟基密度，促进了SCA接枝，从而提高了表面自由能，改善了PPS的润湿和扩散行为。这增强了机械联锁和界面兼容性。超声辅助进一步增强了MAO和SCA的强化作用。用MAO和SCA处理的Ti网达到了GF/PPS关节的最高LSS，为27.2 MPa，是迄今为止报道的最高值。

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引用次数: 0

Enhancing interfacial adhesion and self-healing in PMMA-MAA glass fibre composites via Zn(II)-acetate complexation 通过锌(II)-醋酸酯络合增强PMMA-MAA玻璃纤维复合材料的界面粘附和自愈

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-01-16 DOI: 10.1016/j.compositesa.2026.109578

Clément Mugemana , Carlos I. Cardona , Samet Ozyigit , Jianqun Hao , Patrick Grysan , Doriane Delfrari , Reiner Dieden , Pierre Verge , Alexander S. Shaplov , David Ruch , Carlos A. Fuentes

Infusible thermoplastics based on acrylic resins have gained increasing interest in fibre-reinforced composite manufacturing, primarily due to their low viscosity (100 mPa), enabling efficient fibre impregnation and facilitates processing at low temperatures (<100 °C). Their compatibility with UV and thermal curing system offers further manufacturing flexibility. To integrate self-healing ability, a UV-curable acrylic resin incorporating Zn(II)-acetate complexes as reversible cross-links was developed. Self-healing performance at the fibre–matrix interface was quantitatively evaluated using a novel single-fibre pull-out test methodology employing, real-time optical crack monitoring and paused healing cycles combined with µ-CT tomography for 3D interfacial validation. This approach demonstrated up to 95% recovery of the apparent interfacial shear strength (IFSS). Functionalizing glass fibres with Zn(OAc)₂ significantly improved baseline interfacial adhesion (35% IFSS increase) while maintaining self-healing capability, outperforming conventional epoxy/acrylic sizings. Structural glass fibre-reinforced composites were manufactured using the Vacuum-Assisted Resin Infusion Molding (VARIM) process, and the healing effect of Zn(OAc)₂ complexes was demonstrated by achieving an 85% recovery of the interlaminar shear strength (ILSS) after delamination and subsequent thermal healing treatment. This work presents a scalable approach to integrating self-healing functionality into acrylic-based composites for enhanced structural durability.

基于丙烯酸树脂的不熔热塑性塑料在纤维增强复合材料制造中获得了越来越多的兴趣，主要是因为它们的低粘度（100 mPa），能够有效地浸渍纤维，并且便于在低温（100°C）下加工。它们与UV和热固化系统的兼容性提供了进一步的制造灵活性。为了提高丙烯酸树脂的自愈能力，研制了一种以锌(II)-乙酸酯配合物为可逆交联的紫外光固化丙烯酸树脂。采用新颖的单纤维拔出测试方法定量评估纤维基质界面的自修复性能，该方法采用实时光学裂纹监测和暂停修复周期，并结合微ct断层扫描进行3D界面验证。该方法表明，表观界面剪切强度（IFSS）可恢复95%。用Zn(OAc)2功能化玻璃纤维显著提高了基线界面附着力（IFSS增加35%），同时保持了自修复能力，优于传统的环氧/丙烯酸浆料。采用真空辅助树脂注射成型（VARIM）工艺制备了结构玻璃纤维增强复合材料，并通过分层和随后的热愈合处理实现了85%的层间剪切强度（ILSS）恢复，证明了Zn(OAc)2配合物的愈合效果。这项工作提出了一种可扩展的方法，将自修复功能集成到丙烯酸基复合材料中，以增强结构耐久性。

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