Self-repairable and recoverable organosilicon elastomer based on imine bond, and preparation method thereof

A self-healing, silicone technology, applied in the field of flexible materials, can solve the problems of poor recyclability and insufficient tensile strength, and achieve the effect of low cost, universal applicability and high recyclability

Active Publication Date: 2019-10-22
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Patent CN 109749086 A discloses a method for preparing a self-healing silicone elastomer, which includes: chain-extending reaction of 1,2-dithiocyclopentyl derivative A and amino-containing polysiloxane derivative B The process of synthesizing polysiloxane containing 1,2-dithiocyclopentyl group; using the dynamic disulfide bond of polysiloxane terminal dithiocyclopentyl group to realize the reversible crosslinking of silicone elastomer, and finally prepare the A self-healing silicone elastic, but its tensile strength is not high enough for recyclability

Method used

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  • Self-repairable and recoverable organosilicon elastomer based on imine bond, and preparation method thereof
  • Self-repairable and recoverable organosilicon elastomer based on imine bond, and preparation method thereof
  • Self-repairable and recoverable organosilicon elastomer based on imine bond, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Dissolve 11gα,ω-aminopropylpolysiloxane (Mn: 2000), 2.0g glutaraldehyde (50wt%), and 0.87g tris(4-aminophenyl)amine in an appropriate amount of tetrahydrofuran (the monomer concentration is kept at about 0.1g / ml), mixed uniformly at 40°C, reacted for 2 hours, poured into a polytetrafluoroethylene mold, and dried at constant temperature until constant weight to obtain a silicone elastomer. Cut the silicone elastomer into a dumbbell shape (length×width×thickness: 50×4×0.6mm 3 ), the sample was broken with UTM2502 electronic universal testing machine at room temperature at a tensile rate of 100mm / min, the fractured surface of the sample was fully contacted, and then the sample was placed in a 100°C vacuum oven for repair for 1 hour before testing.

[0064] Figure 1-5 FT-IR images of silicone elastomers, SEM images before and after self-healing, stress-strain curves of silicone elastomers with different molar ratios of amino groups and aldehyde groups, stress-strain curve...

Embodiment 2

[0067] The procedure described in Example 1 was repeated except for 1.451 g of glyoxal (40 wt%).

Embodiment 3

[0069] The procedure described in Example 1 was repeated except for 27.5 g of α,ω-aminopropylpolysiloxane (Mn: 5000).

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Abstract

The invention relates to a self-repairable and recoverable organosilicon elastomer based on an imine bond, and a preparation method thereof. According to the invention, organopolysiloxane containing adynamic imine bond in its main chain is produced by subjecting an amino group-containing polysiloxane derivative A, a chain extender, i.e., an aldehyde group-containing linear monomer derivative B, and a crosslinking agent, i.e., tris(4-aminophenyl)amine C, to a condensation reaction of amino groups and aldehyde groups, and drying is performed at room temperature under normal pressure to preparethe self-repairable and recoverable organosilicon elastomer. The organosilicon elastomer prepared in the invention has good mechanical properties, recoverability and high self-repairing efficiency, and has broad application prospects in the fields of aerospace, electronics, architecture, military projects, marine exploration, biomedicine, etc.

Description

technical field [0001] The invention belongs to the field of flexible materials, in particular to a self-repairable and recyclable silicone elastomer based on an imine bond and a preparation method thereof. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] With the continuous development of electronic technology and material science, various smart electronics and flexible electronic devices have gradually come into people's attention. Among them, the most prominent research fields are flexible display, flexible sensing, wearable electronic products, and electronic skin. etc. direction. The selection of new materials such as flexible dielectric materials, flexible conductiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G12/06C08G12/08
CPCC08G12/06C08G12/08
Inventor 刘月涛张凯铭袁俊国朱传聪郭柯宇高传慧武玉民
Owner QINGDAO UNIV OF SCI & TECH
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