纳米Fe_3O_4负载石墨烯/BMI树脂基复合材料的摩擦学性能

Tribological properties of Nano-Fe_3O_4-coated graphene/bismaleimide (BMI) resin matrix composites

采用化学共沉淀法制备出类球状Fe_3O_4负载石墨烯(GNS-npFe_3O_4)和棒状Fe_3O_4负载石墨烯(GNS-nrFe_3O_4),研究了两种形貌的GNS-Fe_3O_4杂化粒子及其与双马来酰亚胺(BMI)树脂形成的复合材料的摩擦学性能.结果表明,GNS-Fe_3O_4对于BMI树脂具有明显的减摩、抗磨效果.相比于GNS-nrFe_3O_4,GNS-npFe_3O_4在石蜡油体系中展现出更低的摩擦系数和自润滑性,而且其BMI复合材料耐磨性更高.但是,由于较大尺寸的粒子更易在摩擦过程中从基体析出,因而GNS-nrFe_3O_4/BMI相比于GNS-npFe_3O_4/BMI复合材料具有更低的摩擦系数.

This contribution presents the preparation and the tribological properties study of two kinds of nano-Fe3O4-coated graphene/bismaleimide(BMI)resin composites differing in morphology of Fe3O4 nanoparticles.The graphene nanosheets coated with spheroidal Fe3O4 nanoparticles(GNS-npFe3O4)and rod-like Fe3O4 nanoparticles(GNS-nrFe3O4)were prepared by a methodology based on chemical coprecipitation.The friction and wear tests were conducted upon both the prepared GNS-Fe3O4 hybrid particles and the corresponding BMI resin composites.Our experiment confirmed the excellent antifriction and antiwear effect of GNS-Fe3O4 for BMI resin.Compared with GNS-nrFe3O4,the GNS-npFe3O4 exhibits a lower friction coefficient and a self-lubricating characteristic within paraffin oil system,and its BMI composite is more resistant to wear.On the other hand,GNS-nrFe3O4/BMI composites have a lower coefficient of friction than those of GNS-npFe3O4/BMI composites,which can be attributed to the higher precipitation tendency of GNS-nrFe3O4 during the friction process for its larger particle size.