The invention discloses a method for preparing wear-resistant plastic particles by using waste
polystyrene. The method specifically includes the following steps that (1) the waste
polystyrene and
liquid paraffin are put into a reactor for heat treatment under the
nitrogen environment, then
cobalt powder is added for natural cooling, and pretreated
polystyrene is obtained; (2)
tetraethyl orthosilicate is added into a
chitosan solution,
hydrochloric acid is added and then placed in a water bath,
glutaraldehyde is added, and
chitosan / silica particles are obtained by reaction; (3) the pretreated polystyrene is added into
cyclohexanone after being
cut into granules and dried, and
polyvinyl pyrrolidone is added, stirred and dissolved, and then dried particles are added to obtain a
coating solution; and (4) after the
coating solution is treated, a film is scraped on a substrate, removed after phase transfer, and melted and extruded with a
plasticizer and a
lubricant through a twin-screw extruder. According to the method, by increasing the
bond strength between the polystyrene and
silicon dioxide, significant improvement of the
wear resistance of the polystyrene is realized, and the methodis suitable for large-scale and industrial production.