Recyclable cellulose-based conductive self-repairing eutectic gel as well as preparation method and application thereof

A cellulose-based, self-healing technology, applied in the direction of using electric/magnetic devices to transmit sensing components, can solve the problems of time-consuming manufacturing process, complexity, and large-scale application limitations, so as to avoid structural damage and self-healing The effect of adjustable performance and mechanical properties

Active Publication Date: 2022-03-04
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the stability, ductility, and sensitivity of such conductors have been greatly improved, their large-scale applications are still limited by some challenging issues.
Expensive nanomaterials, relatively complex and time-consuming fabrication processes are also important limiting factors for the application of these stretchable conductors

Method used

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  • Recyclable cellulose-based conductive self-repairing eutectic gel as well as preparation method and application thereof
  • Recyclable cellulose-based conductive self-repairing eutectic gel as well as preparation method and application thereof
  • Recyclable cellulose-based conductive self-repairing eutectic gel as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A method for preparing recyclable oriented cellulose-based conductive self-repairing eutectic gel, comprising the following steps:

[0049](1) Mix the PVA solution whose mass fraction range of PVA is 5.0wt% of System 3 with the gelatin solution whose mass fraction range of gelatin is 5.0wt% of System 3, and stir evenly to obtain System 1.

[0050] (2) Glycerol-choline chloride with a molar ratio of 3:1 was configured as DES, and 30 wt% of DES whose mass fraction range was System 3 was added to System 1, and stirred evenly to obtain System 2.

[0051] (3) Add 2.0wt% DCMC whose mass fraction is System 3 to System 2, and stir evenly to obtain System 3.

[0052] (4) Pour system 3 into a mold for directional freezing with liquid nitrogen, and after 3 directional freezing-thawing operations, system 4 is obtained.

[0053] (5) Freeze-drying the system 4 to obtain a recyclable oriented cellulose-based conductive self-healing eutectic gel.

[0054] figure 2 It is a scanning ...

Embodiment 2

[0057] A method for preparing recyclable oriented cellulose-based conductive self-repairing eutectic gel, comprising the following steps:

[0058] (1) Mix the PVA solution whose mass fraction range of PVA is 2.5wt% of System 3 with the gelatin solution whose mass fraction range of gelatin is 5.0wt% of System 3, and stir evenly to obtain System 1.

[0059] (2) Glycerol-choline chloride with a molar ratio of 3:1 was configured as DES, and 30 wt% of DES whose mass fraction range was System 3 was added to System 1, and stirred evenly to obtain System 2.

[0060] (3) Add 2.0wt% DCMC whose mass fraction is System 3 to System 2, and stir evenly to obtain System 3.

[0061] (4) Pour system 3 into a mold for directional freezing with liquid nitrogen, and after 3 directional freezing-thawing operations, system 4 is obtained.

[0062] (5) Freeze-drying the system 4 to obtain a recyclable oriented cellulose-based conductive self-healing eutectic gel.

Embodiment 3

[0064] A method for preparing recyclable oriented cellulose-based conductive self-repairing eutectic gel, comprising the following steps:

[0065] (1) Mix the 10.0wt% PVA solution whose mass fraction range of PVA is System 3 and the 5.0wt% gelatin solution whose mass fraction range is System 3, and stir evenly to obtain System 1.

[0066] (2) Glycerol-choline chloride with a molar ratio of 3:1 was configured as DES, and 30 wt% of DES whose mass fraction range was System 3 was added to System 1, and stirred evenly to obtain System 2.

[0067] (3) Add 2.0wt% DCMC whose mass fraction is System 3 to System 2, and stir evenly to obtain System 3.

[0068] (4) Pour system 3 into a mold for directional freezing with liquid nitrogen, and after 3 directional freezing-thawing operations, system 4 is obtained.

[0069] (5) Freeze-drying the system 4 to obtain a recyclable oriented cellulose-based conductive self-healing eutectic gel.

[0070] Figure 4 and Figure 5 Respectively, in t...

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Abstract

The invention discloses recyclable cellulose-based conductive self-repairing eutectic gel as well as a preparation method and application thereof. The cellulose-based conductive self-repairing eutectic gel based on the imine bond and hydrogen bond reversible network is constructed by adopting polyvinyl alcohol (PVA), dialdehyde carboxymethyl cellulose (DCMC) and gelatin as raw materials, mixing and reacting with a deep eutectic solvent (DES) and utilizing a freeze drying or directional freezing-unfreezing and freeze drying method. Compared with the existing conductive gel, the eutectic gel disclosed by the invention has the characteristics of good mechanical property, anisotropic structure, self-repairing property, freezing resistance, adhesion, reproducible raw materials, low production cost, recyclability, environment friendliness and the like. When the device is used for a sensor, the change condition of strain, the change condition of temperature and humidity and the change of breathing speed and mode can be visually observed.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional polymer flexible materials, in particular to a recyclable cellulose-based conductive self-repairing eutectic gel and its preparation method and application. Background technique [0002] A series of environmental, energy and serious health problems. The development of sustainable and recyclable alternatives is urgent, and cellulose-based materials offer great opportunities for this. At the same time, a series of shortcomings such as brittleness, low elongation rate, and short service life of traditional sensor devices have promoted the rapid development of flexible sensor devices with their unique characteristics of flexibility, high stretchability, and high sensitivity. In order to meet the requirements of high extensibility, high flexibility, high durability and high stability, nanocomposite materials such as carbon nanotubes, carbon black, graphene-based materials, metal nan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/28C08L29/04C08L89/00C08L1/28G01D5/16
CPCC08J9/28G01D5/16C08J2329/04C08J2489/00C08J2389/00C08J2429/04C08J2401/28C08J2201/0482
Inventor 付时雨汪颖张晖
Owner SOUTH CHINA UNIV OF TECH
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