Method of recycling rubber powder of junked tires through activation

Abstract

The invention relates to the technical field of recycle of rubber powder of junked tires, in particular to a method of recycling the rubber powder of the junked tires through activation. Particles of the junked tires and quick lime are subjected to heat treatment under the action of water; microwave radiation is conducted to damage sulfur-sulfur bonds and sulfur-carbon bonds; in combination with bitumen, carbon-carbon bonds and carbon-oxygen bonds not subjected to microwave radiation are repaired; in combination with the ultrasonic effect in an environment where ammonium hydroxide exists, the rubber powder is pre-activated; in combination with ultraviolet irradiation and addition of polyacrylamide and a desulfurizing agent, in the grinding process through a grinding machine, the sulfur-sulfur bonds and the sulfur-carbon bonds are completely damaged, integrity of the carbon-carbon bonds and the carbon-oxygen bonds is protected, the sulfur content in the rubber powder is substantially lowered, the tensile strength of a rubber product prepared by mixing the rubber powder and natural rubber reaches 28-31 MPa, the tensile elongation at break is increased by 30% or above compared with that of a traditional product, and the performance of the rubber product is improved by 1-2.7% compared with that of natural rubber.

Description

technical field [0001] The invention relates to the technical field of tire rubber powder recycling, in particular to a method for activating and recycling 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] After the rubber powder is directly blended with other rubbers, the performance of the prepared product drops sharply. The reason for this phenomenon is mainly caused by the poor interfacial bonding ability between the rubber powder and other molding polymers. Therefore, for the reuse of waste tire rubber powder, it is necessary to activate the rubber powder before r...

AI Technical Summary

Problems solved by technology

In addition, prior art documents have conducted a large number of researches and publications on the above-mentioned technologies for the activation and reuse of rubber powder, but they all use a single or two methods to activate the rubber powder, so that the rubber powder is twice activated. It is low, and makes the quality of the activated rubber powder poor, especially after the prepared rubber powder is blended with natural rubber, its tensile strength only reaches 19MPa, the elongation at break reaches 640%, and the performance drops by 5%; And some researchers have studied the frequency of microwave radiation in microwave radiation, so that the relationship between radiation time, power and rubber powder contact angle is balanced, and then provides a way for microwave radiation treatment to obtain the best time and power. train of thought

[0005] 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