偶联剂处理玻璃纤维改性聚酰亚胺摩擦磨损性能研究

Friction and Wear of Coupling Agent Treated Glass Fiber Modified Polyimide Composites

采用不同硅烷偶联剂对玻璃纤维(GF)进行表面处理,制备了热塑性聚酰亚胺(TPI)复合材料,考察了纤维含量及粒径对复合材料摩擦学性能的影响,并利用SEM分析了磨损机理。研究表明:经表面处理的GF填充TPI复合材料的力学性能和摩擦磨损性能均有提高,以KH-550处理效果最好;随着GF含量的增大,KH550处理的TPI复合材料的磨损率逐渐增大,摩擦系数比纯TPI略有增大;复合材料的磨损率与摩擦系数随纤维粒径的减小而降低;SEM显示处理后的GF与基体之间形成了良好的界面,复合材料的磨损以粘着磨损与磨粒磨损为主。

The glass fibers （GF） were treated by different silane coupling agents, the effects of content and size of GF on mechanical properties and tribology properties of TPI composites were investigated. The worn surfaces were analyzed by SEM. The results indicate that mechanical properties and tribology properties of TPI composites filled with treated GF are higher than those with untreated GF, and the KH550 is most favorable. The wear rate of TPI composites increased with the higher GF content, and the friction coefficient is slightly higher than pure TPI. The wear rate and friction coefficient of TPI composites reduced with the GF size decreased. SEM photograph of fracture surface revealed that there is best interface bonding between KH550 treated GF and TPI matrix. The wear mechanism of the TPI composites is characterized by remarkable adhesion and abrasive wear.