Desulfurization and activation treatment process of waste tire rubber powder

Abstract

The invention discloses a desulfurization and activation treatment process of waste tire rubber powder. The desulfurization and activation treatment process of waste tire rubber powder comprises the following steps: carrying out microwave treatment and pre-sulfurization of waste tire rubber powder, then adding desulfurization additives, carrying out mechanical shearing-chemical desulfurization reaction in a twin-screw extruder, and finally carrying out low-temperature plasma activation to obtain desulfurized and activated waste wire rubber powder. According to the waste tire rubber powder, the desulfurization additives can more easily permeate into the rubber powder under the action of mechanochemical reaction; S-S bonds and C-S bonds in a cross-linking network structure are cut off, so that the rubber powder is restored from a three-dimensional network structure to a linear structure; the rubber powder subjected to low-temperature plasma activation is etched and activated; the specific surface area and the content of surface active groups of the rubber powder are increased; the interface bonding capability of the rubber powder with matrixes such as asphalt and rubber and the like can be improved.

Description

technical field [0001] The invention relates to the technical field of tire rubber powder reuse, in particular to a desulfurization and activation treatment process for waste tire rubber powder. Background technique [0002] With the rapid development of the automobile industry, the output of waste tires is also increasing year by year, which not only poses a serious threat to the environment, but also leads to a large amount of waste of resources; therefore, the recycling of waste tires is not only helpful It can alleviate environmental problems and realize the sustainable application and development of resources. [0003] However, the rubber molecular chains in the vulcanized rubber powder have been cross-linked into a network structure, which has poor fluidity, low surface activity, poor processability, and poor interfacial bonding ability with other molding and processing polymers. If it is directly blended with other rubber After that, the performance of the prepared p...

AI Technical Summary

Problems solved by technology

[0004] The best processing time and power can be obtained by using a single microwave radiation treatment, but for the activation treatment of rubber powder, only microwave radiation treatment makes the quality of the prepared rubber powder still unable to meet the requirements for the activity of rubber powder, making The scope of use of rubber powder is limited, which leads to low tensile strength and elongation at break of the prepared product, and the performance after blending will decrease