Role of Graphene oxide and addition of MoS₂ in HDPE matrix for improved tribological properties

The nano filler addition further enhances the properties; especially wear and grating which are very well known. Keeping these points in view, the current work focuses on establishing the tribological behaviour i.e., both slide wear and friction with various load applications for different levels of graphene oxide addition (0.5% to 2%) and MoS₂ addition at 0.8%.The specimens were developed through compression molding technique. The test samples were prepared to the required sizes and subjected to slide wear and friction measurements using pin on disc set up; which is carried out as per ASTM guidelines. The weight change measurements were done by noting the initial and final weight of the test samples to get the slide wear loss. The hardness esteems were obtained by utilizing Shore D Hardness analyzer according to ASTM guidelines. The weight change measurements to get slide wear loses were done. The coefficient of friction was computed by dividing frictional load with normal load. It is very well seen from the test data that the slide wear resistance increments with increment in graphene oxide content (0.5% to 2%) in steps of 0.5%; as the hardness level showed an increase with a similar level of increment in graphene oxide content. The co-efficient of friction has demonstrated a declining pattern with increment in graphene content for the load applications of various loads. The slide wear and friction results have been interpreted based on logical thinking involving literature reports and supporting tests. Thus, there are positive responses observed in respect of the graphene oxide addition to HDPE matrix. This makes the material suitable for wear resistant applications in automotive industries.