Abstract
The present research responds to two current tendencies, such as circular economy, involving reuse of industrial waste, and green chemistry, presupposing application of renewable resources and technologies, which minimize the negative environmental impact. The present article is dedicated to the study of the application of rice husk and its ash as a filled for epoxy composite materials. Rice husk represents a multi-tonnage agricultural by-product, subject to recycling, and at the same time, is a valuable source of amorphous silica. Temperature regime of rice husk ash (RHA) production, optimum content and particle size of filler providing maximum modifying effect were determined. The influence of modifying fillers on the complex of operational properties of filled epoxy compositions including hardness, wear resistance, adhesion to steel and aluminium and antifriction properties of epoxy coatings has been established. A comparative analysis of the properties of modified compositions with non-filled ones and with compositions filled with fully amorphous silica, including industrial analogue Aerosil 300, has been carried out. It has been established that the best compatibility with polymer epoxy matrix is possessed by rice husk ash obtained at the combustion temperature of 500оC introduced in the amount of 10 mass parts per 100 mass parts of epoxy polymer.
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