2D layered graphite-enhanced TPU/EPDM composites with superior resistance to hydrogen-induced damage and dual hydrogen barrier networks

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing Pub Date : 2025-08-20 DOI:10.1016/j.compositesa.2025.109256

Wenjie Mou , Xiaoquan Li , Bing Gan , Yuanming Zhang , Yaling Liu , Chilou Zhou

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Abstract

This study explores two-dimensional layered graphite for improving hydrogen barrier properties and resistance to hydrogen-induced damage in polymer composites. Graphite was surface-modified with (3-Aminopropyl) triethoxysilane (APTES) and incorporated in polymer matrix composites via melt mixing. FT-IR quantified the degree of hydrogen bonding in the composites, while SEM showed TPU as the matrix, EPDM as the dispersed phase, and uniformly distributed graphite. A composite with 5 phr modified graphite (G5) demonstrated exceptional resistance to hydrogen-induced damage, with mechanical property changes below 10 % after high-pressure hydrogen exposure. TGA and DSC confirmed excellent thermal stability, though hydrogen exposure slightly reduced crystallinity. Hydrogen permeability tests showed a permeability coefficient of 0.789 × 10^-9 mol·m/(m²·s·MPa) for G5, 61.3 % lower than TPU and 92.09 % lower than EPDM. These enhancements are attributed to layered graphite filling free volume, increasing density, and forming the dual hydrogen barrier networks with EPDM. This complex structure significantly extended hydrogen diffusion pathways.

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二维层状石墨增强TPU/EPDM复合材料具有优异的抗氢损伤和双氢屏障网络

本研究探索了二维层状石墨用于提高聚合物复合材料的氢屏障性能和抗氢损伤能力。用（3-氨基丙基）三乙氧基硅烷（APTES）对石墨进行表面改性，并通过熔融混合将其掺入聚合物基复合材料中。FT-IR量化了复合材料中氢键的程度，SEM显示TPU为基体，EPDM为分散相，石墨均匀分布。5phr改性石墨（G5）复合材料表现出优异的抗氢损伤能力，高压氢暴露后力学性能变化低于10%。TGA和DSC证实了优异的热稳定性，尽管氢暴露会略微降低结晶度。氢渗透性试验表明，G5的渗透系数为0.789 × 10-9 mol·m/(m2·s·MPa)，比TPU低61.3%，比EPDM低92.09%。这些增强归功于层状石墨填充自由体积，增加密度，并与EPDM形成双氢障网络。这种复杂的结构显著地扩展了氢的扩散途径。

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来源期刊

Composites Part A: Applied Science and Manufacturing 工程技术-材料科学：复合

CiteScore

15.20

自引率

5.70%

发文量

492

审稿时长

30 days

期刊介绍： Composites Part A: Applied Science and Manufacturing is a comprehensive journal that publishes original research papers, review articles, case studies, short communications, and letters covering various aspects of composite materials science and technology. This includes fibrous and particulate reinforcements in polymeric, metallic, and ceramic matrices, as well as 'natural' composites like wood and biological materials. The journal addresses topics such as properties, design, and manufacture of reinforcing fibers and particles, novel architectures and concepts, multifunctional composites, advancements in fabrication and processing, manufacturing science, process modeling, experimental mechanics, microstructural characterization, interfaces, prediction and measurement of mechanical, physical, and chemical behavior, and performance in service. Additionally, articles on economic and commercial aspects, design, and case studies are welcomed. All submissions undergo rigorous peer review to ensure they contribute significantly and innovatively, maintaining high standards for content and presentation. The editorial team aims to expedite the review process for prompt publication.