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A kind of conductive silicone elastomer based on mxene and its preparation method and application

An elastomer and silicone technology, applied in the field of conductive silicone elastomer and its preparation, can solve the problems of lack of self-healing performance, unstable material conductivity, and inability to continue application, and achieves high-efficiency room temperature self-healing ability, preparation The effect of process environmental protection and excellent electrical conductivity

Active Publication Date: 2022-07-22
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This physical method is sprayed on the silicone material to form a silicone conductive material, which does not have self-healing properties. Once the material is damaged, it cannot continue to be used.
On the other hand, the conductivity of the material will be unstable in terms of stretching

Method used

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  • A kind of conductive silicone elastomer based on mxene and its preparation method and application
  • A kind of conductive silicone elastomer based on mxene and its preparation method and application
  • A kind of conductive silicone elastomer based on mxene and its preparation method and application

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Experimental program
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Effect test

Embodiment approach

[0060] According to the present invention, a method for preparing an MXene-based conductive organosilicon elastomer, a preferred embodiment, includes the following steps:

[0061] Disperse UPy-NCO and amino-functionalized polysiloxane derivative A in dichloromethane, react at 50℃~70℃ for 12~24h, and then add carboxylic acid derivatives containing disulfide bonds after the reaction is completed Compound B was reacted at 50℃~70℃ for 6~12h to obtain polysiloxane derivative C containing multiple reversible bonds; MXenesE and carboxyl group-containing L-citrulline D were dispersed in deionized water, and heated at 100℃ The modified MXenesF was obtained by ultrasonically dispersing the modified MXenesF into the organosilicon polymer network containing the polysiloxane derivative C containing multiple reversible bonds, stirring and ultrasonicating. The MXene-based conductive silicone elastomer is obtained by shaking the reaction for 1 hour, and curing to form a film.

[0062] In ord...

Embodiment 1

[0077] 0.16 g of UPy-NCO and 10 g of branched polydimethylaminosiloxane (Mn: 2000) were mixed in a three-necked flask. The temperature was raised to 70°C, and the reaction time was 16h. 0.84g of 2,2'-dithiodibenzoic acid was added to the reactant, and the reaction continued for 4h. After the reaction is completed, the product is poured into a polytetrafluoroethylene mold, placed in a vacuum drying oven at 40° C. until constant weight, to obtain a polysiloxane containing disulfide bonds and multiple hydrogen bonds. 1g MXenes (multilayer Ti 3 C 2 ) in 15 ml of deionized solution to obtain a suspension. 0.3g L-citrulline, multilayer Ti 3 C 2 The suspension was added to a 50ml three-necked flask with a reflux device and a stirrer and mixed uniformly at 100°C. After 12h of reaction, the modified multilayer Ti was obtained. 3 C 2 . 10g of polysiloxane containing disulfide bonds and multiple hydrogen bonds was mixed with 1g of modified multilayer Ti 3 C 2 Ultrasonic dispers...

Embodiment 2

[0082] The procedure described in Example 1 was repeated, except that 0.84 g of 2,2'-dithiodibenzoic acid was replaced with 0.46 g of 2,2'-dithiodipropionic acid.

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Abstract

The invention relates to a conductive silicone elastomer based on MXene, a preparation method and application thereof. Through the dehydration reaction of amino group and carboxyl group and the addition reaction of amino group and isocyanate, in the functionalized polysiloxane derivative A containing amino group Disulfide bonds and multiple hydrogen bonds were introduced to obtain polysiloxane derivatives C containing disulfide bonds and multiple hydrogen bonds; MXenesE was modified with carboxyl-containing citrulline D through esterification to obtain amide bonds containing MXenesE. To modify MXenesF, the polysiloxane derivative C containing disulfide bonds and multiple hydrogen bonds and the modified MXenesF containing amide bonds were compounded to obtain MXene-based conductive silicone elastomers. It has efficient room temperature self-healing ability, excellent mechanical properties, excellent electrical conductivity and sensitive sensing ability. It can be applied to applications in flexible sensing, electronic skin, wearable electronics and soft robotics.

Description

technical field [0001] The invention belongs to the field of flexible composite materials, in particular to an MXene-based conductive organosilicon elastomer and a preparation method and application thereof. Background technique [0002] The disclosure of information in this Background section is only for enhancement of understanding of the general background of the invention and should not necessarily be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art. [0003] With the continuous development of polymer composite materials, the demand for various flexible composite conductive devices in people's daily life is increasing, and the most prominent research fields are flexible sensors, electronic skin, wearable electronic products, software. In the direction of robotics and other directions, various flexible composite conductive devices often need to have good conductivity, str...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/08C08K9/04C08K7/00C08K3/14C08G77/392
CPCC08K9/04C08K7/00C08K3/14C08G77/392C08L83/08
Inventor 刘月涛王哲张德金张凯铭高传慧武玉民
Owner QINGDAO UNIV OF SCI & TECH
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