Abstract
In recent times carbon black is getting part replaced in the tire industry by silica as the major reinforcing filler for the development of “greener tires”. The green claim comes from the fact that silica reinforcement helps in further fuel saving in vehicles and reduction in CO2 emission into the environment. Making the green claim further, researchers are also looking at reinforcement fillers that are synthesized from bio-waste as raw materials. In this paper we have evaluated the effect of replacing carbon black with highly dispersible silica derived from an agro based by-product such as rice husk ash in a basic tire tread formulation of passenger car tires. Our approach has been to first develop an economical & scalable process for extracting silicate from rice husk ash in the form of sodium silicate followed by synthesizing tire grade functionalized highly dispersible silica that have greater dispersibility in the tire rubber matrix and thereby achieve similar or better physical properties for the tire rubber with potential of reduced rolling resistance of tires.
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