Abstract

In this article, phosphate modified epoxy resin (PAEK) and polyethylene oxide (PEO) were used as the main monomers to fabricate a composite sizing agent (TPP) for carbon fiber (CF) surface treatment. The effects of TPP sizing on the surface morphology, activity and wettability of CF were studied by FE-SEM, XPS and contact angle. In addition, friction coefficients, fuzz amount and the mechanical properties of CF filaments, as well as the interlaminar shear strength (ILSS) of CF composites were analyzed. The results indicate that the defects of CF surface were completely repaired by TPP molecules, the content of active groups increased by 24.8 % and the contact angle and the spreading time of EP on CF surface reached respective minimum values of 43.5 ° and 15 s, meanwhile, the friction coefficient and the fuzz amount of the treated CF surface are reduced in the sizing quantity range of 3.0–4.0 mg/g. Thus, there were 36.1 % and 24.3 % enhancement in the breaking strength and elongation of CF filament. In addition, the ILSS of composite prepared with TPP treated CFs was increased from 12.81 to 28.55 MPa.

中文翻译：

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上浆剂的分子结构设计及其对CF增强复合材料力学性能的影响

摘要

在本文中，以磷酸盐改性的环氧树脂（PAEK）和聚环氧乙烷（PEO）为主要单体，以制备用于碳纤维（CF）表面处理的复合施胶剂（TPP）。通过FE-SEM，XPS和接触角研究了TPP施胶对CF的表面形貌，活性和润湿性的影响。此外，还分析了CF复合材料的摩擦系数，起毛量和机械性能，以及CF复合材料的层间剪切强度（ILSS）。结果表明，TPP分子完全修复了CF表面的缺陷，活性基团的含量增加了24.8％，EP在CF表面的接触角和扩展时间分别达到43.5°和15s的最小值。 ，在3.0-4.0 mg / g的施胶量范围内，处理过的CF表面的摩擦系数和起毛量降低。因此，CF长丝的断裂强度和伸长率分别提高了36.1％和24.3％。另外，用TPP处理过的CFs制备的复合材料的ILSS从12.81 MPa增加到28.55 MPa。