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Self-repairing modified silicone rubber and preparation method thereof

A modified silicon, self-healing technology, applied in the field of polymer materials, can solve the problems of volatile matter release and energy consumption environment, single self-healing mechanism, unable to obtain self-healing effect materials and other problems, achieve excellent self-healing function, Avoiding environmental problems and enhancing resilience

Inactive Publication Date: 2019-09-10
刘涛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the one hand, the self-healing mechanism of existing self-healing polymer materials is relatively simple, and it is impossible to obtain materials with good comprehensive performance and ideal self-healing effect; on the other hand, structural units with reversible non-covalent interactions are When introducing high-fraction chains, it is generally necessary to add a co-solvent to the reaction system, which will lead to the release of volatile compounds (VOC) and energy consumption and environmental problems during the preparation and use of self-healing polymer materials; In recent years, it is of great significance to how to prepare a solvent-free, environmentally friendly and multiple self-healing silicone resin, which is becoming a major research hotspot in the field of polymer materials

Method used

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  • Self-repairing modified silicone rubber and preparation method thereof
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  • Self-repairing modified silicone rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A preparation method of self-healing modified silicone rubber, specifically comprising the steps of:

[0046] step one:

[0047] Add 1.0 parts of phenylenediamine and 0.5 parts of pyromellitic anhydride to dimethylacetamide, stir at room temperature for 5 hours, add 0.1 parts of maleic anhydride, continue the reaction for 3 hours, add 1.5 parts of triethylamine and 1.5 parts of acetic anhydride parts, the temperature was raised to 60°C, and the reaction was carried out for 8h. The reaction solution was poured into petroleum ether, a large amount of solid precipitation occurred, filtered, the obtained solid was washed 3 times with 5wt% aqueous sodium bicarbonate solution, washed with deionized water three times, and dried to prepare the product I. 3 As a solvent, NMR characteristic absorption spectrum (such as figure 1 Shown): δ=8.32~8.35(a, 2H), δ=7.84~7.88(b, 4H), δ=7.35~7.39(c, 8H);

[0048] Step two:

[0049]Add 2 parts of dichlorodimethylsilane to the solvent et...

Embodiment 2

[0055] A preparation method of self-healing modified silicone rubber, specifically comprising the steps of:

[0056] step one:

[0057] Add 1.0 parts of phenylenediamine and 0.6 parts of pyromellitic anhydride to dimethylacetamide, stir at room temperature for 6 hours, add 0.3 parts of maleic anhydride, continue the reaction for 4 hours, add 1.8 parts of triethylamine and 1.8 parts of acetic anhydride parts, the temperature was raised to 60°C, and the reaction was carried out for 8h. The reaction solution was poured into petroleum ether, and a large amount of solid precipitated, filtered, and the obtained solid was washed three times with 5 wt% sodium bicarbonate aqueous solution, three times with deionized water, and dried to prepare product I.

[0058] Step two:

[0059] Add 2 parts of dichlorodimethylsilane to the solvent ethyl acetate, and 5 parts of triethylamine as an acid-binding agent, place it in an ice bath, and then add dichlorohydrin dropwise through a constant p...

Embodiment 3

[0065] A preparation method of self-healing modified silicone rubber, specifically comprising the steps of:

[0066] step one:

[0067] Add 1.0 parts of phenylenediamine and 0.9 parts of pyromellitic anhydride to dimethylacetamide, stir at room temperature for 8 hours, add 0.5 parts of maleic anhydride, continue the reaction for 3 hours, add 2.0 parts of triethylamine and 2.0 parts of acetic anhydride parts, the temperature was raised to 60°C, and the reaction was carried out for 8h. The reaction solution was poured into petroleum ether, and a large amount of solid precipitated, filtered, and the obtained solid was washed three times with 5 wt% sodium bicarbonate aqueous solution, three times with deionized water, and dried to prepare product I.

[0068] Step two:

[0069] Add 2 parts of dichlorodimethylsilane to the solvent ethyl acetate, and 6 parts of triethylamine as an acid-binding agent, place it in an ice bath, and then add dichlorohydrin dropwise through a constant p...

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Abstract

The invention belongs to the technical field of polymer materials, and particularly relates to self-repairing modified silicone rubber and a preparation method thereof. According to the silicon rubberand preparation method provided by the invention, a dynamic covalent bond, a polyamide structure and a Si-O-Si chemical bond in the self-repairing polyimide-modified silicone rubber are not only usedas a self-repairing unit but also as a reinforcing and toughening unit to synthesize the high-strength high-toughness copolymer with a repair function; in addition, a reaction can be carried out without a co-solvent in the system, so that the environmental problem caused by release of volatile organic compounds (VOC) during the preparation and use of the self-repairing silicone rubber material isgreatly avoided; and the preparation method is simple and high-efficiency, has controllable reaction conditions, low energy consumption, environmental protection and no pollution, and has higher process operability in subsequent industrial production.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a self-repairing modified silicone rubber and a preparation method thereof. Background technique [0002] Silicone resin is a cross-linked thermosetting polysiloxane system with Si-O-Si as the main chain and organic groups connected to silicon atoms. The special composition and structure endow silicone resin with excellent heat resistance and weather resistance. Due to its advantages of light weight, wear resistance, easy processing, and easy molding, it has been widely used in many fields such as industry and life. application. Its products mainly involve electrical insulating varnishes, coatings, adhesives, plastics, flame retardants, moisture-proof agents, micropowders and trapezoidal polymers, etc., which are widely used in electronic appliances, light industry textiles, construction, medical treatment, aerospace and other fields. However, silicone mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/455
CPCC08G77/455
Inventor 刘涛
Owner 刘涛
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