Rubber material and preparation method thereof

Abstract

The invention provides a rubber material and a preparation method. The rubber material is prepared by mixing thiol graphene with natural or synthetic rubber latex and demulsifying and agglomerating. The thiol graphene is prepared by two-step reaction from graphene oxide and a thiol-amino compound. Through the process, when the thiol graphene is prepared, the epoxy group and the carboxyl group in the graphene oxide both react with the thiol-amino compound to obtain the graphene oxide with higher grafting efficiency. The preparation method also avoids addition of traditional graphene as a fillerto rubber, and the rubber material is prepared from the thiol graphene and the rubber latex. During the vulcanization of the rubber material, the thiol group can react with rubber double bonds so asto participate in the vulcanization of the rubber, and finally the mechanical properties of the prepared rubber composite material are obviously improved, at the same time, the friction loss due to the poor interface affinity can be reduced, heating of a rubber product during use is reduced, raw materials used in the method are cheap, the preparation process is simple, and the mass production is convenient; and the properties of the rubber product are easy to adjust by changing of the chemical structure.

Description

technical field [0001] The invention relates to a rubber material and a preparation method, belonging to the technical field of rubber materials. Background technique [0002] As an important elastomer material, rubber is widely used in all aspects of national defense construction and social life. However, unreinforced rubber has low strength, low modulus, poor wear resistance, and low practicability, so most rubbers need to be reinforced. At present, carbon black is mainly used as a reinforcing agent, but the preparation process of carbon black consumes a lot of energy and produces serious pollution; and the inherent viscoelastic hysteresis loss of the rubber material and the friction between the macromolecular chains and fillers inside the rubber will produce More heat will heat up the rubber system and deteriorate its performance; however, fillers with higher reinforcement efficiency and functionality are urgently needed in diverse applications. [0003] Graphene oxide ...

AI Technical Summary

Problems solved by technology

However, the graphene material has poor affinity with rubber, it is difficult to disperse in rubber and there will be defects at the interface, which will affect the performance of the final product

The prior art has modified graphene or graphene oxide, Ji (J.Ji, G.Zhang, H.Chen, Y.Li, G.Zhang, F.Zhang, X.Fan, J.Mater.Chem .2011,21,14498-14501) obtained mercapto-modified graphene by sulfonating graphene oxide and then reducing it, but the operation steps of this method are cumbersome, and the toxicity of sulfonating reagent is relatively large, which limits the application of mercapto-modified graphene Xi Kai et al. (Xi Kai, Wang Yuan, Dong Xiaohu, Huang Xin, Chen Shangshang, Jia Xudong, Yu Xuehai, CN 102923700 B) introduced mercapto groups into graphene, but only reacted with epoxy groups and amino groups in this patent. The grafting efficiency is low, which seriously limits its application in composite materials and other fields, and in the prior art, mercapto-modified graphene is basically used in fields such as conductive materials, and it has not been reported to use it for modifying rubber properties.

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