Study on mechanical and tribological properties of ternary fluororubber filled with four needles of zinc oxide

Abstract

Abstract This article deals with study of the influence of four‐needle zinc oxide (T‐ZnOw) on the basic mechanical properties of ternary fluororubber (FKM) and the frictional properties of FKM improved by four‐needle zinc oxide under different temperatures. T‐ZnOw/FKM composites were prepared by mechanical blending and hot molding after pretreatment with silane coupling agent. The hardness, tensile, tearing, rotating friction at normal temperature, and reciprocating friction at high temperature of FKM and T‐ZnOw/FKM were studied. The results showed that T‐ZnOw with needle‐like three‐dimensional (3D) structure can effectively decompose the point stress generated in the tensile process of the composite, and the uniform distribution of tensile force improves the fracture base point and final mechanical properties of the composite. Its unique 3D structure can reduce fatigue wear caused by extrusion plastic deformation of the matrix during the friction process. The friction coefficient and wear rate of materials were effectively reduced by the reduction of plastic deformation resistance and fatigue wear area in the process of friction. Especially at 200°C, the friction coefficient and wear rate of T‐ZnOw/FKM were reduced by 30% and 55.32%, respectively, by T‐ZNOW/FKM doping.