Contribution of surface roughness and oxygen-containing groups to the interfacial shear strength of carbon fiber/epoxy resin composites

IF 5.7 3区材料科学 Q2 Materials Science New Carbon Materials Pub Date : 2023-12-01 DOI:10.1016/S1872-5805(23)60720-6

Yi-cai Liang , Xing-hua Zhang , Xing-hai Wei , De-qi Jing , Wei-guo Su , Shou-chun Zhang

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Abstract

The interfacial shear strength (IFSS) between carbon fibers (CFs) and the matrix is crucial to the performance of CF-reinforced polymer composites. To evaluate the contribution of mechanical interlocking and chemical anchoring at the interfaces of a polyacrylonitrile-based CF (TORAYCA T800SC-12000-10E)-reinforced epoxy resin (EP: bisphenol A type epoxy resin and tetrafunctional epoxy resin) composites, the surface roughness and content of oxygen-containing functional groups of the CFs were respectively altered by ammonia treatment and electrochemical oxidation. The results showed that ammonia treatment increased the surface roughness without much change to the surface elemental composition, while electrochemical oxidation increased the number of surface oxygen groups without changing the surface roughness. The IFSS of CF/EP composites was tested by the micro-droplet method. The relationships between IFSS, and surface roughness and oxygen content were obtained by linear fitting. The results showed that in the interfacial bonding of CF to epoxy resin, the contribution of chemical anchoring to the IFSS is larger than that of mechanical interlocking.

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表面粗糙度和含氧基团对碳纤维/环氧树脂复合材料界面剪切强度的影响

碳纤维（CF）与基体之间的界面剪切强度（IFSS）对碳纤维增强聚合物复合材料的性能至关重要。为了评估聚丙烯腈基碳纤维（东丽凯 T800SC-12000-10E）增强环氧树脂（EP：双酚 A 型环氧树脂和四官能团环氧树脂）复合材料界面的机械互锁和化学锚固作用，分别采用氨处理和电化学氧化法改变了碳纤维的表面粗糙度和含氧官能团的含量。结果表明，氨处理增加了表面粗糙度，但表面元素组成没有太大变化；而电化学氧化增加了表面含氧基团的数量，但表面粗糙度没有变化。微滴法测试了 CF/EP 复合材料的 IFSS。通过线性拟合得出了 IFSS 与表面粗糙度和氧含量之间的关系。结果表明，在 CF 与环氧树脂的界面粘合中，化学锚固对 IFSS 的贡献大于机械互锁。

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来源期刊

New Carbon Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

6.10

自引率

8.80%

发文量

3245

审稿时长

5.5 months

期刊介绍： New Carbon Materials is a scholarly journal that publishes original research papers focusing on the physics, chemistry, and technology of organic substances that serve as precursors for creating carbonaceous solids with aromatic or tetrahedral bonding. The scope of materials covered by the journal extends from diamond and graphite to a variety of forms including chars, semicokes, mesophase substances, carbons, carbon fibers, carbynes, fullerenes, and carbon nanotubes. The journal's objective is to showcase the latest research findings and advancements in the areas of formation, structure, properties, behaviors, and technological applications of carbon materials. Additionally, the journal includes papers on the secondary production of new carbon and composite materials, such as carbon-carbon composites, derived from the aforementioned carbons. Research papers on organic substances will be considered for publication only if they have a direct relevance to the resulting carbon materials.