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Self-healing flexible composite material and preparation method thereof

A composite material, self-healing technology, applied in the direction of organic chemistry, organic chemistry, etc., can solve the problems of poor dispersion and low self-healing efficiency of polymer composite materials, achieve enhanced mechanical strength, excellent self-healing performance, increase The effect of interlayer spacing

Inactive Publication Date: 2020-08-28
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of poor dispersion of graphene in polymer matrix and low self-repair efficiency of polymer composite materials, and provide a self-healing flexible composite material and its preparation method

Method used

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  • Self-healing flexible composite material and preparation method thereof
  • Self-healing flexible composite material and preparation method thereof
  • Self-healing flexible composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Dissolve 0.02mol of compound 1 in N,N'-dimethylformamide, add 0.04mol of furan-3-methanol under nitrogen atmosphere, and react at 80°C for 5h;

[0038] (2) Preparation of maleimide derivatives

[0039] Dissolve 0.01mol of 1,8-octanediamine and 0.02mol of maleic anhydride in chloroform, react in ice bath for 4 hours, react at room temperature for 24 hours, collect the precipitate by filtration, add triethylamine, acetic anhydride and nickel acetate after drying, Dissolved in acetone, heated to reflux for 6 hours to collect the product, and further recrystallized with a mixed solution of chloroform:methanol=5:3 (v / v) to obtain the maleimide derivative 1;

[0040] (3) Add 0.02 mol of maleimide derivative 1 to the reaction solution in step (1), and continue to react at 80°C for 3 hours; after the reaction, pour the reaction solution into a mold, and dry the volatile solvent to obtain a flexible material ; Use a blade to draw a wound on the obtained material, and the se...

Embodiment 2

[0048] (1) Disperse 0.15wt% graphene oxide in N,N'-dimethylformamide, add 4,4'-methylene bis(phenylisocyanate), and then react at 100°C for 2h, the reaction After completion, obtain isocyanate group-terminated graphene oxide; add 3-furfuraldehyde to the reaction solution that has completed the reaction, and react at 120° C. for 4 hours under an atmosphere of inert gas, and obtain furan-functionalized graphene oxide after the reaction is completed;

[0049] (2) The functionalized graphene oxide containing furan group obtained in step 1) and the maleimide derivative obtained in step 2) of Example 1 are mixed for Diels-Alder reaction, and self-healing properties are obtained after the reaction is completed flexible composite material; Diels-Alder reaction conditions: temperature 120 ℃, time 3h.

Embodiment 3

[0051] (1) Dissolve maleic anhydride and 1,5-naphthalene diamine in chloroform, react in ice bath for 4 hours, react at room temperature for 24 hours, collect the precipitate by filtration, add triethylamine, acetic anhydride, nickel acetate after drying, dissolve In acetone, heat and reflux for 6 hours to collect the product, and further precipitate with a large amount of ether to obtain the maleimide derivative 2;

[0052] (2) Mix the furan-functionalized graphene oxide obtained in step 1) of Example 2 and the maleimide derivative obtained in step 1) to perform Diels-Alder reaction, and obtain a flexible composite material with self-healing properties after the reaction is completed ; Diels-Alder reaction conditions: temperature 40 ℃, time 24h.

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Abstract

The invention discloses a self-healing flexible composite material and a preparation method thereof, and belongs to the field of material preparation. According to the preparation method of the self-healing flexible material, furan functionalized graphene oxide is prepared, so that the interlayer spacing of graphene is increased, the problem of dispersity of graphene is solved, and the mechanicalproperty of the material is remarkably improved; a Diels-Alder reaction is carried out on the furan functionalized graphene oxide and maleimide derivatives to generate the flexible material with a dynamic covalent bond; and the reaction conditions are mild, the generated flexible material has excellent self-healing performance, external stimulation is not needed in the healing process, and self-repairing can be achieved at the room temperature. The problems that graphene is poor in dispersity in a polymer matrix and a polymer composite material is low in self-repairing efficiency are solved.

Description

technical field [0001] The invention belongs to the field of material preparation, in particular to a self-healing flexible composite material and a preparation method thereof. Background technique [0002] At present, most flexible materials will face the problem of cracks and partial peeling after mechanical deformation such as bending or stretching. These problems will directly affect the comprehensive performance of materials, thereby shortening the service life and limiting the wide application of flexible materials. Based on this, research on self-healing flexible materials has emerged. [0003] Self-healing materials include self-repair through external aid storage and self-repair of the body under the stimulation of external conditions (such as light, current, pH change, heating, etc.) in reversible chemical reactions. Stimulus conditions are controllable. With the rapid development of dynamic covalent chemistry, composite materials formed by reversible chemical r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C07D491/18
CPCC07B2200/11C07D491/18C08G83/001
Inventor 陈香李高莹莹步怀天
Owner SHAANXI UNIV OF SCI & TECH
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