Conductive organic silicon elastomer based on MXene as well as preparation method and application of conductive organic silicon elastomer

A technology of elastomer and silicone, which is applied in the field of conductive silicone elastomer and its preparation, can solve the problems of unstable material conductivity, lack of self-healing performance, and inability to continue to apply, so as to achieve environmental protection in the preparation process and high efficiency at room temperature. The effect of healing ability and excellent electrical conductivity

Active Publication Date: 2021-10-01
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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  • Conductive organic silicon elastomer based on MXene as well as preparation method and application of conductive organic silicon elastomer
  • Conductive organic silicon elastomer based on MXene as well as preparation method and application of conductive organic silicon elastomer
  • Conductive organic silicon elastomer based on MXene as well as preparation method and application of conductive organic silicon elastomer

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Experimental program
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Embodiment approach

[0060] According to the present invention, the preparation method of the conductive silicone elastomer based on MXene, a kind of preferred embodiment, comprises steps as follows:

[0061] Disperse UPy-NCO and amino functionalized polysiloxane derivative A in dichloromethane, react at 50°C-70°C for 12-24h, after the reaction is completed, add carboxylic acids containing disulfide bonds to derivate Compound B was reacted at 50°C-70°C for 6-12h to obtain polysiloxane derivative C containing multiple reversible bonds; disperse MXenesE and carboxyl-containing L-citrulline D in deionized water, React for 12 to 24 hours, wash 5 times with a high-speed centrifuge to obtain the modified MXenesF; ultrasonically disperse the modified MXenesF into the organosilicon polymer network of polysiloxane derivative C containing multiple reversible bonds, stir and ultrasonically The reaction was shaken for 1 hour, and then solidified to form a film, and the MXene-based conductive silicone elastome...

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 and placed in a vacuum drying oven at 40°C until constant weight to obtain polysiloxane containing disulfide bonds and multiple hydrogen bonds. 1gMXenes (multilayer Ti 3 C 2 ) was dispersed 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 equipped with a reflux device and a stirrer and mixed uniformly at 100°C. After 12 hours of reaction, the modified multilayer Ti 3 C 2 . 10g of polysiloxane containing disulfide bonds and multiple hydrogen bonds was mixed with 1g of modified multilayer Ti 3 C 2 Ultraso...

Embodiment 2

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

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Abstract

The invention relates to a conductive organic silicon elastomer based on MXene and a preparation method and application thereof. Disulfide bonds and multiple hydrogen bonds are introduced into an amino-containing functionalized polysiloxane derivative A through a dehydration reaction of amino and carboxyl and an addition reaction of amino and isocyanate to obtain a polysiloxane derivative C containing the disulfide bonds and the multiple hydrogen bonds; the preparation method comprises the following steps: modifying MXenesE by adopting carboxyl-containing citrulline D through esterification reaction to obtain modified MXenesF containing an amido bond, and compounding a polysiloxane derivative C containing a disulfide bond and multiple hydrogen bonds with the modified MXenesF containing the amido bond to obtain the conductive organic silicon elastomer based on MXene. The self-healing polymer has efficient room-temperature self-healing capability, excellent mechanical property, excellent conductivity and sensitive sensing capability. The method can be applied to flexible sensing, electronic skin, wearable electronic products and soft robots.

Description

technical field [0001] The invention belongs to the field of flexible composite materials, in particular to a conductive silicone elastomer based on MXene, its preparation method and application. 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 polymer composite materials, the demand for various flexible composite conductive devices in people's daily life is increasing. Among them, the most prominent research fields are flexible sensors, electronic skin, wearable electronic products, software In the direction of robots, various flexible composite conductive devices often need to have good conductivity, stretchability and self-healing capa...

Claims

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Application Information

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Patent Type & Authority Applications(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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