Silane-grafted graphene oxide improves wear and corrosion resistance of polyimide matrix: molecular dynamics simulation and experimental analysis
Silane-grafted graphene oxide improves wear and corrosion resistance of polyimide matrix: molecular dynamics simulation and experimental analysis
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硅烷接枝氧化石墨烯提高聚酰亚胺基体的耐磨性和耐腐蚀性：分子动力学模拟与实验分析
DOI：
10.1007/s10853-019-03672-9
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发表时间：
2019
影响因子：
4.5
通讯作者：
Chen Jianmin
中科院分区：
文献类型：
--
作者：
Yuan Rui;Ju Pengfei;Wu Yanping;Ji Li;Li Hongxuan;Chen Lei;Zhou Huidi;Chen Jianmin
氧化石墨烯（GO）及其衍生物对聚合物基体的增强作用高度依赖于它们在其中的分散。因此，开发了一种通过与γ-甲基丙烯酰氧基丙基三甲氧基硅烷（GO-KH 570）复合来增强GO的分散性的简便方法。采用分子动力学模拟与实验相结合的方法，研究了GO与KH 570之间的界面相互作用，以及GO与KH 570的表面形貌、化学组成和极性。结果表明，KH 570可以通过共价键成功地接枝到GO纳米片表面，并且通过调节KH 570的用量可以调节所得GO-KH 570的极性。此外，GO-KH 570还被进一步用作改善聚酰亚胺（PI）基体性能的填料。使用该复合材料后，PI基涂层具有优异的耐磨性和耐腐蚀性。特别是GO-KH 570 - 2用量为0.5wt%的PI/GO-KH 570 -2涂层具有更高的硬度，显示出作为航空航天和海洋工业候选高性能涂层的良好潜力。
The reinforcing effect of graphene oxide (GO) and its derivatives for polymer matrices highly depends on their dispersion therein. Thus, a facile method was developed to enhance the dispersibility of GO via compounding with γ-methacryloxypropyltrimethoxysilane (GO–KH570). The interfacial interactions between GO and KH570, as well as the surface morphology, chemical composition and polarity, were investigated by molecular dynamics simulation combined with experimental methods. Findings indicate that KH570 can successfully graft onto the surface of GO nanosheets via the covalent bonding, and the polarity of the as-obtained GO–KH570 can be tuned by adjusting the dosage of KH570. Besides, the GO–KH570 was further used as the filler to improve performances of polyimide (PI) matrix. After using this GO–KH570 composite, the PI-based coating was endowed with excellent wear resistance and corrosion resistance properties. Particularly, PI/GO–KH570-2 coating with a GO–KH570-2 dosage of 0.5 wt% exhibits much higher hardness, showing promising potential as the candidate high-performance coating in aerospace and marine industries.