材料科学
摩擦学
X射线光电子能谱
傅里叶变换红外光谱
扫描电子显微镜
化学工程
表面改性
复合材料
胶粘剂
高分子化学
工程类
图层(电子)
作者
Yuan Jia,Zhen Liu,Beibei Li,Juxiang Yang
摘要
In order to improve the dispersion and compatibility of the hydroxyl silicates (HNSs) in organic resin matrix, the HNSs were first functionalized by N ‐(2‐aminoethyl)‐3‐aminopropyltrimethoxysilane (KH‐792) via a hydrolysis process; thus, the imino and amidogen groups can be grafted on the surface of HNSs (NH 2 ‐HNSs). Fourier transform infrared spectroscopy, scanning electron microscopy, and X‐ray photoelectron spectroscopy are employed to characterize the chemical structure and surface morphology changes on the surface of HNSs after modified. The modified NH 2 ‐HNSs were then used as fillers to add into bismaleimide (BMI) to prepare the new NH 2 ‐HNSs/BMI composites. The influences of NH 2 ‐HNSs content on the mechanical, tribological, and thermal properties of BMI resin were also researched. The results showed that adding NH 2 ‐HNSs with appropriate content (6.0 wt%) could significantly improve the comprehensive properties of the NH 2 ‐HNSs/BMI composites. It can be observed from the scanning electron microscopy (SEM) on the wear surface of the materials that, the wear mechanism of the BMI resin was converted from adhesive wear to abrasive wear after the addition of NH 2 ‐HNSs. The improvement of tribological and mechanical properties can be mainly attributed to the chemical reaction between BMI and NH 2 ‐HNSs.
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