改性氮化硼复合环氧防腐涂层的制备及力学性能

Preparation and Mechanical Performance of Modified Boron Nitride Composite Epoxy Anti-corrosive Coatings

摘要:

采用界面化学处理方法，通过羟基改性、氨丙基三甲基硅烷（KH550）沉积和TiO₂沉积对六方氮化硼（h-BN）进行表面改性，将改性氮化硼引入环氧树脂（EP）制备了改性氮化硼复合环氧防腐涂层，并对其力学性能进行了研究。结果表明：改性h-BN的掺入提升了环氧防腐涂层的整体性能，其最佳掺量为0.5%；KH550沉积改性氮化硼（KBN）对纯EP涂层拉伸性能的增强效果最显著，复合涂层KBN/EP的抗拉强度相较于纯EP涂层显著提高；复合涂层TiO₂沉积羟基改性h-BN/EP在干摩擦和海水摩擦下均表现出优异的耐磨性，且摩擦系数较纯EP涂层显著降低。

Abstract:

Hexagonal boron nitride（h-BN） was modified by hydroxylation modification， aminopropyltrimethoxysilane（KH550） deposition， and TiO₂ deposition via interfacial chemical treatment method. The modified h-BN was then incorporated into epoxy resin（EP） to fabricate modified h-BN composite EP anti-corrosive coatings， and the mechanical properties of the resultant coatings were systematically investigated. The results show that the incorporation of modified h-BN effectively enhances the overall performance of the EP coatings， with the optimal doping content of 5%. The KH550 deposited modified h-BN（KBN） exhibits the most prominent reinforcement effect on the tensile properties of pure EP coating. Compared to pure EP coating， the tensile strength of composite coating KBN/EP is significantly improved. In addition， composite coating TiO₂ deposited hydroxyl modified h-BN/EP displays excellent wear resistance under both dry friction and seawater friction， and its friction coefficient is significantly lower than that of pure EP coating.