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Multi-walled carbon nanotube covalent bond enhanced self-repairing polymer conductive material and preparation method thereof

A technology of multi-walled carbon nanotubes and conductive materials is applied in the field of multi-walled carbon nanotubes covalent bond-enhanced self-healing polymer conductive materials and their preparation, which can solve the problems of reducing the mechanical properties of materials and the inability of the conductive medium to be uniformly dispersed. , to achieve the effect of high mechanical and electrical self-healing efficiency, high electrical conductivity and high mechanical properties

Inactive Publication Date: 2018-06-15
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although much progress has been made in this strategy, conductive media are often not uniformly dispersed in composite materials, thereby degrading the mechanical properties of these materials.
Therefore, it is a challenge to design self-healing conductive composites with high mechanical strength
Meanwhile, finding healable conductive composites with adhesive, injectable properties, and sensing capabilities in gel systems has rarely been reported.

Method used

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  • Multi-walled carbon nanotube covalent bond enhanced self-repairing polymer conductive material and preparation method thereof
  • Multi-walled carbon nanotube covalent bond enhanced self-repairing polymer conductive material and preparation method thereof
  • Multi-walled carbon nanotube covalent bond enhanced self-repairing polymer conductive material and preparation method thereof

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Embodiment 1

[0041] A method for preparing a self-healing polymer conductive material reinforced by covalent bonds of multi-walled carbon nanotubes, comprising the steps of:

[0042] 1) Preparation of undecylenol-modified carboxyl multi-walled carbon nanotubes mMWCNT;

[0043] Add 1 g of carboxyl multi-walled carbon nanotubes MWCNT-COOH to 70 mL of THF, sonicate for 0.5 h to disperse, and continue to stir for 1 h, 0°C ice bath for 0.5 h, add 1.562 g of EDCI and 0.068 g of DMAP, add 0.631 g of ten Mono-enol, stirred at room temperature for 72 h, filtered off the solvent, repeatedly rinsed with deionized water several times, and vacuum-dried at 70°C for 24 h to obtain undecenol-modified carboxyl multi-walled carbon nanotubes mMWCNT;

[0044] 2) Synthesis of P(BMA-co-LMA) / mMWCNT multi-walled carbon nanotubes covalently bonded self-healing polymer conductive materials;

[0045] Add 0.038 g of the undecylenol-modified carboxyl multi-walled carbon nanotube mMWCNT prepared in step 1) into 30 mL ...

Embodiment 2

[0047] A method for preparing a self-healing polymer conductive material reinforced by covalent bonds of multi-walled carbon nanotubes, comprising the steps of:

[0048] 1) Preparation of undecylenol-modified carboxyl multi-walled carbon nanotubes mMWCNT;

[0049] Add 1 g of carboxyl multi-walled carbon nanotubes MWCNT-COOH to 70 mL of THF, sonicate for 0.5 h to disperse, and continue to stir for 1 h, 0°C ice bath for 0.5 h, add 1.562 g of EDCI and 0.068 g of DMAP, add 0.631 g of ten Mono-enol, stirred at room temperature for 72 h, filtered off the solvent, repeatedly rinsed with deionized water several times, and vacuum-dried at 70°C for 24 h to obtain undecenol-modified carboxyl multi-walled carbon nanotubes mMWCNT;

[0050] 2) Synthesis of P(BMA-co-LMA) / mMWCNT multi-walled carbon nanotubes covalently bonded self-healing polymer conductive materials;

[0051] Add 0.038 g of the undecylenol-modified carboxyl multi-walled carbon nanotubes mMWCNT prepared in step 1) into 30 mL...

Embodiment 3

[0053] A method for preparing a self-healing polymer conductive material reinforced by covalent bonds of multi-walled carbon nanotubes, comprising the steps of:

[0054] 1) Preparation of undecylenol-modified carboxyl multi-walled carbon nanotubes mMWCNT;

[0055] Add 1 g of carboxyl multi-walled carbon nanotubes MWCNT-COOH to 70 mL of THF, sonicate for 0.5 h to disperse, and continue to stir for 1 h, 0°C ice bath for 0.5 h, add 1.562 g of EDCI and 0.068 g of DMAP, add 0.631 g of ten Mono-enol, stirred at room temperature for 72 h, filtered off the solvent, repeatedly rinsed with deionized water several times, and vacuum-dried at 70°C for 24 h to obtain undecenol-modified carboxyl multi-walled carbon nanotubes mMWCNT;

[0056] 2) Synthesis of P(BMA-co-LMA) / mMWCNT multi-walled carbon nanotubes covalently bonded self-healing polymer conductive materials;

[0057] Add 0.038 g of the undecylenol-modified carboxyl multi-walled carbon nanotubes mMWCNT prepared in step 1) into 30 mL...

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Abstract

The invention discloses a multi-walled carbon nanotube covalent bond enhanced self-repairing polymer conductive material and a preparation method thereof, and belongs to the field of novel materials.According to the preparation method of the multi-walled carbon nanotube covalent bond enhanced self-repairing polymer conductive material, a series of self-repairing polymer electric conductors are prepared by carrying out random copolymerization on multi-walled carbon nanotube which is modified by butyl methacrylate, cauryl methacrylate and undecylenyl alcohol. The covalent binding between the multi-walled carbon nanotube and polymer avoids the aggregation and uneven dispersion of the multi-walled carbon nanotube in a polymer matrix. The obtained polymer electric conductor has higher conductivity (about 11S m<-1>) and higher mechanical properties (Young modulus is 10 MPa and tensile strength is 0.89MPa) as well as higher mechanical and electrical self-healing efficiency (greater than 94 percent of mechanical strength and greater than 98 percent of conductivity). More importantly, the composite material also shows other unique characteristics such as self-repairability, thermo-sensitivity, tackiness and injectability.

Description

technical field [0001] The invention relates to the field of new materials, in particular to a multi-walled carbon nanotube covalent bond reinforced self-repairing polymer conductive material and a preparation method thereof. Background technique [0002] Conductive materials have received extensive attention in recent years due to their wide range of applications, such as sensors, actuators, supercapacitors, batteries, electronic skin, etc. However, aging or mechanical damage can shorten the lifetime of electronic devices. Therefore, the concept of self-healing is introduced into conductive materials, which are able to repair their own damage after damage. Generally, there are three main approaches to construct self-healing conductive materials. The first, microcapsules containing conductive media may have been widely developed. Rupture of the microcapsules or microtubules releases the encapsulated conductive medium and flows to the damaged area, restoring electrical con...

Claims

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Application Information

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IPC IPC(8): C08L33/10C08K9/04C08K7/24C08F220/18
CPCC08F220/18C08F220/1804C08F220/1812C08K7/24C08K9/04C08K2201/001C08K2201/011C08L33/10
Inventor 刘利彬张强潘晨光
Owner QILU UNIV OF TECH