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Synthesis method of self-repairing elastomer material based on eucommia rubber

A technology of elastomer materials and synthesis methods, applied in the field of synthesis of self-healing elastomer materials, can solve problems such as difficult to be repaired in time, macro cracks, material failure, etc., and achieve low-cost raw materials, easy-to-obtain raw materials, and mature process routes Effect

Active Publication Date: 2017-01-18
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These micro-damages are difficult to find, so it is difficult to repair them in time, and further development will cause macroscopic cracks and lead to material failure

Method used

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  • Synthesis method of self-repairing elastomer material based on eucommia rubber
  • Synthesis method of self-repairing elastomer material based on eucommia rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 10 g of eucommia gum to 120 ml of petroleum ether, raise the temperature to 42°C until completely dissolved, continue to add 100 ml of deionized water and stir to obtain a stable emulsion of eucommia gum. To this was added 6 ml of formic acid and H 2 o 2 20 ml, and epoxidation reaction at 42°C for 5h. After the epoxidation reaction, the emulsion system was adjusted to pH=5 with 10% aqueous sodium hydroxide solution, and 5 ml of methyltriethoxysilane, 10.0 ml of formic acid, and 5 ml of absolute ethanol were added to continue the reaction for 3 h. The product was precipitated by absolute ethanol, washed, and dried in vacuo to constant weight.

Embodiment 2

[0025] Add 20 g of eucommia gum to 260 ml of cyclohexane, raise the temperature to 60°C until completely dissolved, continue to add 150 ml of deionized water and stir to obtain a stable emulsion of eucommia gum. To this was added 6 ml of formic acid and H 2 o 2 30ml, epoxidation reaction 2 h. After the epoxidation reaction, the pH of the system was adjusted to 9 with ammonia water. A solution made of 6 ml dichlorodimethylsilane, 12 ml absolute ethanol, 12 ml deionized water and 0.3 ml hydrochloric acid was added dropwise at a constant speed, and the reaction was continued for 2 h after the addition was completed. The product was precipitated by absolute ethanol, washed, and dried in vacuo to constant weight.

Embodiment 3

[0027] Dissolve 20 g of Eucommia gum in 260 ml of cyclohexane, raise the temperature to 50°C until completely dissolved, continue to add 150 ml of deionized water and stir to obtain a stable emulsion of Eucommia gum. To this was added 10 ml of formic acid and H 2 o 230 ml, and epoxidized at 50°C for 3 h. After the epoxidation reaction, the pH of the system was adjusted to 4 with 10% aqueous sodium hydroxide solution. 8 ml of 3-aminopropyltrihydroxysilane, 26 ml of formic acid, 10 ml of absolute ethanol, and 10 ml of deionized water were successively added thereto, and the reaction was continued for 2 h. The product was precipitated by absolute ethanol, washed, and dried in vacuo to constant weight.

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Abstract

The invention discloses a synthesis method of a self-repairing elastomer material based on eucommia rubber, and relates to a synthesis method of the self-repairing elastomer material. By adoption of a preparation method with an emulsion process and a Sol-Gel technology and chemical modification, a multi-functional-group modifier is introduced into a eucommia rubber molecular chain, and a self-repairing structural mechanism is introduced, so that the eucommia rubber is endowed with the self-repairing performance. The synthesis method comprises the following steps: firstly, performing partial epoxidation modification on double bonds in a main molecular chain of the eucommia rubber; adding an excellent solvent and deionized water into the eucommia rubber in sequence, preparing into a stable emulsion, then adding an epoxidation reagent for epoxidation reaction, performing ring-opening condensation reaction on an epoxy group and the multi-functional-group modifier to graft multiple functional groups to the molecular chain of the eucommia rubber. Quick auto repairing can be realized at room temperature, and no heating pressurization is needed in a self-repairing process; the synthesis method has a very important application value in the fields of aerospace, buildings, automobiles, bionts, marine industry and the like.

Description

technical field [0001] The invention relates to a synthesis method of a self-repairing elastic body material, in particular to a synthesis method of a self-repairing elastic body material based on eucommia gum. Background technique [0002] Self-healing refers to the ability of the material itself to judge, control and recover from defects. During its molding process and subsequent use, materials are inevitably subjected to external stimuli such as heat, machinery, chemistry, and ultraviolet radiation, which cause local damage or microcracks inside the material. These micro-damages are difficult to find, so it is difficult to repair them in time, and further development will cause macroscopic cracks and lead to material failure. Self-healing materials can self-detect and self-repair micro-damages through a certain mechanism, thereby significantly improving the safety of materials and prolonging the service life of materials. This feature is of great significance to the fie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08C19/06C08C19/40
CPCC08C19/06C08C19/40
Inventor 杨凤王文远杨阳方庆红
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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