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Preparation method of self-repairing electrode material based on supramolecular double-network structure

A technology of network structure and electrode material, which is applied in the direction of equipment for manufacturing conductive/semiconductive layers, cable/conductor manufacturing, circuits, etc., can solve the problems of limited number of self-repair cycles, hindering the conductivity of conductive paths, and reducing the conductivity. Achieve the effects of simple and efficient synthesis method, recovery of electrical properties, and controllable material properties

Inactive Publication Date: 2019-11-05
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, there are two types of self-healing materials. One is external self-healing materials, which need to be implanted with self-healing media. Specific rather than random healing, and the number of self-healing cycles is limited; the other is internal self-healing materials, which use recoverable covalent bonds (such as disulfide bonds) or dynamic interactions (such as hydrogen bonds) in the system to complete Self-healing, but the stretchability of the polymer matrix cannot be guaranteed after self-healing. The self-healing of nanostructures in the polymer matrix is ​​the key to ensuring the self-healing of the conductive network

Method used

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  • Preparation method of self-repairing electrode material based on supramolecular double-network structure
  • Preparation method of self-repairing electrode material based on supramolecular double-network structure
  • Preparation method of self-repairing electrode material based on supramolecular double-network structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Weigh boric acid and hydroxyl-terminated polydimethylsiloxane, add them into the reaction flask at a mass ratio of 1:1, and stir thoroughly to completely disperse the boric acid to obtain a boric acid mixture;

[0030] (2) Weigh 0.2 g of commercial silica gel cross-linking agent and 2 g of commercial silica gel into the reaction bottle, and stir thoroughly to completely disperse the cross-linking agent to obtain a commercial silica gel mixture;

[0031] (3) While stirring, add the commercial silica gel mixture obtained in step (2) to the boric acid mixture obtained in step (1) dropwise at a ratio of 10 wt%, and react in a vacuum oven at 120°C for 24 h. After the reaction, the reaction bottle was cooled to room temperature to obtain a colorless and transparent solid, which was an elastomer;

[0032] (4) Hydrophobizing the substrate, that is, dissolving 1H,1H,2H,2H-perfluorooctyltrichlorosilane in n-hexane to make a 2-5mol / mL solution, soaking the substrate for 1 hour...

Embodiment 2

[0034] Example 2: Same as Example 1, the molecular weight of polydimethylsiloxane in step (1) is 85 kg / mol.

Embodiment 3

[0035] Embodiment 3: The stoichiometric ratio of boric acid to polydimethylsiloxane in step (1) is 1.

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Abstract

The invention relates to a self-repairing electrode material, in particular to a preparation method of a self-repairing electrode material based on a supramolecular double-network structure. In the invention, the synthesis method for preparing the self-repairing electrode material is simple and efficient; the material has biocompatibility, not only has self-repairing mechanical properties and rheological properties, but also can drive a conductive network to be self-repaired; and the process is not limited, does not need external stimulation and can be carried out at any temperature. Accordingto the method, the performance of the material can be controlled by changing the ratio of the two networks, so that the material has targeted application. The self-repairing material prepared by themethod can completely recover electrical properties within 25 minutes at normal temperature, has self-adhesiveness, and is convenient to be compounded with a conductive material to prepare a human body electrode material attached to the skin.

Description

technical field [0001] The invention relates to a polydimethylsiloxane elastomer-based self-repairing electrode material, in particular to a preparation method of a self-repairing electrode material based on a supramolecular double network structure. Background technique [0002] In recent years, flexible devices have been widely studied in the fields of biomedicine, energy storage and conversion devices, wearable devices, medical sensors, and portable devices due to their characteristics of flexibility and lightness. However, the existing flexible device materials have poor stretchability and electrical properties, and many failures of flexible electronic devices are caused by mechanical damage. On the one hand, the life of the device is severely limited, and on the other hand, it leads to more and more electronic waste. To solve the above problems, self-healing materials are of great importance due to their potential application in flexible and stretchable electronic devic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00C08L83/04C08K3/08C08K7/06C08K3/04C08K7/24C08K3/38C08J5/18
CPCC08J5/18C08J2383/04C08K3/041C08K3/042C08K3/08C08K3/38C08K7/06C08K2201/001C08K2201/011H01B13/0026
Inventor 李卓唐淼
Owner FUDAN UNIV
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