Abstract A polyetherimide (PEI) nanoparticle coating was prepared on carbon fiber (CF) surface by an evaporation induced surface modification, which was confirmed by scanning electron microscopy and Fourier-transform infrared spectrometer. The PEI nanoparticles were not perfectly spherical, but were pie shaped as observed by field emission scanning electron microscopy. Thus, the PEI nanoparticles were adsorbed on the CF surface instead of accumulating on the CF surface. To understand the effect of PEI nanoparticles on the interfacial shear strength between CF and thermoplastic resins, CF with a PEI nanoparticle coating was heated to melt the PEI nanoparticles. In addition to the desized CF, these three samples were used as reinforcements and some widely used engineering thermoplastic resins. The single filament fragmentation test was employed to assess the interfacial shear strength with an improved sample preparation process. The results show that the introduction of PEI coating increased the interfacial shear strength between CF and the thermoplastic resins mentioned above, especially the surface of the PEI coating used a nanoparticle morphology. In combination with the hot-bonding experiments, the compatibility of thermoplastic resins and PEI coating was shown to influence interfacial shear strength, but it was not the main factor.

中文翻译：

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聚醚酰亚胺纳米粒子涂层对碳纤维与热塑性树脂界面剪切强度的影响

摘要 通过蒸发诱导表面改性在碳纤维（CF）表面制备了聚醚酰亚胺（PEI）纳米颗粒涂层，并通过扫描电子显微镜和傅里叶变换红外光谱仪进行了证实。PEI 纳米粒子不是完美的球形，而是通过场发射扫描电子显微镜观察到的饼状。因此，PEI 纳米粒子被吸附在 CF 表面而不是积累在 CF 表面。为了了解 PEI 纳米粒子对 CF 和热塑性树脂之间界面剪切强度的影响，将带有 PEI 纳米粒子涂层的 CF 加热以熔化 PEI 纳米粒子。除了退浆CF，这三个样品被用作增强材料和一些广泛使用的工程热塑性树脂。通过改进的样品制备过程，采用单丝断裂试验来评估界面剪切强度。结果表明，PEI涂层的引入提高了CF与上述热塑性树脂之间的界面剪切强度，尤其是PEI涂层的表面采用了纳米颗粒形态。结合热粘合实验，表明热塑性树脂与 PEI 涂层的相容性会影响界面剪切强度，但不是主要因素。