Double-wall sandwich structural microcapsule self-repairing rubber and preparation method thereof

Abstract

The invention provides a double-wall sandwich structural microcapsule self-repairing rubber and a preparation method thereof, and relates to a rubber and a preparation method thereof. The preparation method comprises the step of sequentially mixing a rubber matrix, stearic acid, zinc oxide, an accelerant, an anti-aging agent, carbon black, paraffin, a double-wall sandwich structural self-repairing microcapsule and a nano mesoporous molecular sieve in proportion, wherein the double-wall sandwich microcapsule is utilized and adopts urea-formaldehyde resin as the wall material, so that the sealing performance is high, and the manufactured walls have moderate hardness; the nano mesoporous molecular sieve utilized as a synergist is naturally inorganic filler which can improve the mechanical performance of the rubber, and a double coating brings higher heat-resisting stability, therefore, the contact probability of a repairing agent and the catalyst is greatly increased, and the influence of excessively added repairing agents and catalysts to the mechanical performance of the rubber can be avoided. Once microcrack appears in the material, a plurality of pores act to improve the capillary siphon effect of the microcrack to the microcapsule, thus the probability of the repairing agent and the curing agent to enter the microcrack is greatly increased, and as a result, the repairing effect is greatly improved.

Description

[0001] technical field [0002] The invention relates to a rubber preparation method, in particular to a preparation method of mesoporous molecular sieve synergistic double-wall sandwich structure microcapsule self-repairing rubber. [0003] Background technique [0004] With the advancement of science and technology, the mechanical properties of rubber have been greatly improved, and it has entered the ranks of engineering and functional materials from daily necessities materials, and is widely used in space exploration vehicles, artificial satellites, rockets, houses and bridge construction, automobiles and aircraft, etc. Machinery industry and engineering fields such as dams, electrical and electronics, and deep-sea diving. However, rubber is vulnerable to macroscopic and microscopic damage during use and under the influence of the surrounding environment. Cracks and microcracks are the main manifestations of microscopic damage. Microcracks are the starting po...

AI Technical Summary

Problems solved by technology

Due to the small contact probability between the repair agent and the catalyst, the repair efficiency of single-wall microcapsules is still relatively low, and excessive amounts of microcapsules and catalysts will affect the mechanical properties of the material

If double-wall microcapsules are used, although the contact probability between the catalyst and the repair agent is increased, the capillary siphon effect of the micro-cracks in the material itself is not strong, so that the probability of all the two-layer wall materials of the double-wall microcapsules breaking is small, and the repair effect not ideal