Abstract It has been proved the interface between fibers and resin matrix suffers from severe service conditions, but it was rarely explored how to directly and quantitatively evaluate those negative effects. In this work, a novelly-designed quantitative analysis method was established via atomic force microscopy (AFM) based on shrinkage degree of resin matrix, and was further applied to assess the effects of hygrothermal and thermal treatment on the interfacial adhesion property of carbon fibers/epoxy composites (CFRPs). This method presented that the shrinkage extent of resin around carbon fibers after treatment could in a certain extent reflect the interfacial properties at the stability and linear constraint region. Furthermore, interlaminar shear strength and interfacial shear strength measurements demonstrated the validity of this novel method for interfacial properties, and revealed that the interface was more susceptible to hygrothermal than thermal treatment. This method is believed promising for studies on the interface of fibers/resin composites.

中文翻译：

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基于原子力显微镜表征的碳纤维与环氧树脂经过湿热和热处理后界面性质的定量分析

摘要 已经证明纤维和树脂基体之间的界面受到恶劣的使用条件，但很少探索如何直接和定量评估这些负面影响。在这项工作中，基于树脂基体的收缩程度，通过原子力显微镜（AFM）建立了一种新颖设计的定量分析方法，并进一步应用于评估湿热和热处理对碳纤维界面粘合性能的影响/环氧复合材料（CFRP）。该方法表明，处理后碳纤维周围树脂的收缩程度可以在一定程度上反映稳定和线性约束区域的界面性质。此外，层间剪切强度和界面剪切强度测量证明了这种新方法对界面性质的有效性，并表明界面比热处理更容易受到湿热影响。这种方法被认为有希望用于研究纤维/树脂复合材料的界面。