Abstract

An original method to increase the mechanical strength of adhesively joined carbon fiber-reinforced plastics (CFRPs) and honeycomb CFRP sandwich structures by etching is proposed, based on sulfuric acid etching of the CFRP surface. Etched composites are joined by a novel phenolic resin-based adhesive and are cured, and their cross section is observed by FESEM. Etching of CFRP was aimed to obtain a “brush”-like composite to be infiltrated by the adhesive, giving a fiber-reinforced, stronger composite joint. This method gave a 100% increase in the lap shear strength for the adhesively joined etched CFRP, compared to the non-etched ones.

中文翻译：

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蚀刻碳纤维增强塑料以提高其结合强度

摘要

提出了一种通过对碳纤维增强塑料表面进行硫酸蚀刻的方法，通过蚀刻来提高碳纤维增强塑料（CFRP）和蜂窝状碳纤维增强塑料夹层结构的机械强度的原始方法。蚀刻后的复合材料通过新型酚醛树脂基粘合剂粘合并固化，并通过FESEM观察其横截面。蚀刻CFRP的目的是获得一种“刷状”复合材料，该复合材料将通过粘合剂渗透，从而形成纤维增强的，更坚固的复合材料接头。与未蚀刻的CFRP相比，这种方法使粘接的蚀刻CFRP的搭接剪切强度提高了100％。