Preparation method of natural rubber composite based on modified waste rubber powder recycling

CN119798800BActive Publication Date: 2026-06-23QINGDAO UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
QINGDAO UNIV OF SCI & TECH
Filing Date
2024-12-26
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Waste rubber powder is difficult to form a good bonding interface in rubber materials, and the performance of composite materials gradually declines with increasing addition. How to improve its activity and compatibility to achieve effective recycling?

Method used

The waste rubber powder was mixed with a deep eutectic solvent and then ball-milled in a planetary ball mill to break the sulfur crosslinking bonds. After drying in an oven, it was then mixed with natural rubber, carbon black, etc. in a mixer and finally vulcanized on a flat vulcanizing machine to form a modified waste rubber powder/natural rubber composite material.

Benefits of technology

It significantly improves the recycling rate of waste rubber powder in rubber materials, improves compatibility and mechanical properties, reduces production costs, reduces environmental pollution, broadens application fields, and approaches or even reaches the performance level of industrial carbon black/natural rubber composites.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application provides a preparation method of natural rubber composite based on modified waste rubber powder recycling, and belongs to the technical field of waste rubber powder recycling and rubber mixing. The method comprises three main steps: first, a deep eutectic solvent is prepared by mixing a quaternary ammonium salt with a hydrogen bond donor and stirring until a uniform liquid is obtained; second, modified waste rubber powder is prepared by mixing the waste rubber powder with the deep eutectic solvent and performing ball milling treatment to break the sulfur cross-linking bonds and promote the reaction between the deep eutectic solvent and the rubber powder; and finally, a natural rubber composite is prepared by mixing natural rubber, small materials, carbon black and modified waste rubber powder in a banbury mixer to obtain the final product. The method reduces energy consumption and pollutant emissions, reduces production costs and broadens the application field of rubber composites. Through the use of modified waste rubber powder, the mechanical properties and dynamic mechanical properties of the composite material of the application are close to or reach the level of industrial carbon black / natural rubber composite, which has significant environmental and economic benefits.
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