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Self-repairing carbon nanotube organic silicon composite elastomer as well as preparation method and application thereof

A carbon nanotube and organosilicon technology, which is applied in the field of self-healing carbon nanotube-organosilicon composite elastomer and its preparation, can solve the problems of non-self-healing, tensile properties and low sensitivity, and achieves excellent electrical conductivity and sensitivity. , high sensitivity, and the effect of super tensile properties

Active Publication Date: 2020-12-11
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a self-healing carbon nanotube-organosilicon composite elastomer for the shortcomings of the current traditional flexible strain sensor, such as low sensitivity, inability to self-repair and poor tensile performance

Method used

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  • Self-repairing carbon nanotube organic silicon composite elastomer as well as preparation method and application thereof
  • Self-repairing carbon nanotube organic silicon composite elastomer as well as preparation method and application thereof
  • Self-repairing carbon nanotube organic silicon composite elastomer as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] This embodiment provides a self-healing carbon nanotube-organic silicon composite elastomer to provide its preparation method, the steps include:

[0036] S1. In an argon gas atmosphere, mix amino-terminated polydimethylsiloxane, chloroform solution and catalyst triethylamine, stir and react for 1h under ice bath conditions, and then dissolve toluene diisocyanate in chloroform solution , continue to stir and react under ice bath conditions for 0.5-2h;

[0037] S2. Remove the ice bath device, stir and react at room temperature for 2.5 to 4 hours to obtain a viscous product, soak the viscous product in methanol solution for 12 hours, remove unreacted small molecular substances and catalysts, and obtain a transparent and free product after drying. Colored silicone elastomer;

[0038] S3. dissolving the carboxylated carbon nanotubes in tetrahydrofuran, and ultrasonically treating them for 1 hour to obtain a uniformly dispersed carbon nanotube solution;

[0039] S4. Dissol...

Embodiment 2～7

[0041] In this implementation, the carbon nanotube-organosilicon composite elastomer was prepared according to the method described in Example 1 according to the formula in parts by weight described in Table 1.

[0042] Table 1

[0043]

[0044]

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Abstract

The invention discloses a self-repairing carbon nanotube organic silicon composite elastomer as well as a preparation method and application thereof. Raw materials of the self-repairing carbon nanotube organic silicon composite elastomer comprise amino-terminated polydimethylsiloxane, diisocyanate and carboxylated carbon nanotubes, reversible strong and weak multiple hydrogen bonds are formed in the composite elastomer, and can be used as weak power bonds to consume energy generated by strain, so that the elastomer shows excellent tensile property, and cracks can be rapidly repaired, and excellent self-repairing performance is achieved. Meanwhile, due to the introduction of the carboxylated carbon nanotubes, the hydrogen bond interaction is further enhanced, and a strain sensor is endowedwith excellent conductivity and sensitive sensing performance. Through a crosslinking mechanism of strong and weak hydrogen bonds in the carbon nanotube organic silicon elastomer, the flexible strainsensor with high repair efficiency, excellent tensile property and high sensitivity can be prepared.

Description

technical field [0001] The invention relates to the technical field of flexible strain sensors, in particular to a self-healing carbon nanotube-organosilicon composite elastomer and its preparation method and application. Background technique [0002] Flexible strain sensor is an electronic device with super environmental adaptability made of flexible materials. With the rapid development of smart terminals and mobile Internet, flexible sensors have been widely developed and applied due to their strong flexibility and high integration. Flexible strain sensors are traditionally composed of flexible substrates and conductive fillers, and the choice of substrate materials has a great influence on the sensitivity and flexibility of flexible sensors. Currently, traditional flexible strain sensors suffer from low sensitivity, non-self-healing, and poor tensile properties, which limit their applications in healthcare, wearable electronics, and soft robotics. [0003] Compared wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C08G77/388G01B7/16
CPCC08G83/001C08G77/388G01B7/18
Inventor 经鑫马振萍米皓阳王文志刘跃军
Owner HUNAN UNIV OF TECH
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