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Self-healing hydrogel of cellulose-dopamine-polymer composite material as well as preparation method and application of self-healing hydrogel

A composite material, cellulose technology, applied in conductive materials, conductive materials, organic material conductors and other directions, can solve problems such as non-recyclable, conductive materials do not have repair ability, etc., to achieve short reaction time, good electrical conductivity and mechanical properties , the effect of a wide range of raw materials

Active Publication Date: 2018-08-03
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But traditional conductive materials do not have the ability to repair and cannot be recycled

Method used

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  • Self-healing hydrogel of cellulose-dopamine-polymer composite material as well as preparation method and application of self-healing hydrogel
  • Self-healing hydrogel of cellulose-dopamine-polymer composite material as well as preparation method and application of self-healing hydrogel
  • Self-healing hydrogel of cellulose-dopamine-polymer composite material as well as preparation method and application of self-healing hydrogel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A method for preparing a self-healing hydrogel of cellulose-dopamine-polymer composite material, comprising the steps of:

[0044] 1) Using sodium hydroxide, urea and distilled water as raw materials, configure an alkali urea solution according to the mass ratio of 7:12:81;

[0045] 2) Mix 2 g of microcrystalline cellulose and 98 g of -10°C pretreated alkali urea solution and stir rapidly for 15 minutes to obtain the microcrystalline cellulose alkali urea solution; then freeze the microcrystalline cellulose alkali urea solution at -20°C for 12 hours , and then take it out and stir and dissolve at room temperature to obtain a more uniformly dispersed cellulose alkali urea solution;

[0046] 3) Add 1 g of epichlorohydrin to 10 g of cellulose alkali urea solution in an oil bath at 30° C., and then stir for 15 min to obtain the first mixed liquid.

[0047] 4) At room temperature, 20 mg of dopamine was added to the first mixed solution, and then stirred for 30 min to obtain...

Embodiment 2

[0052] A self-healing hydrogel for preparing cellulose-dopamine-polymer composites, the method is the same as in Example 1, except that:

[0053] Step 2) Mix 3 g of corncob cellulose and 97 g of -12°C pretreated alkali urea solution and stir rapidly for 15 minutes to obtain Avicel alkali urea solution; then place the Avicel alkali urea solution at -20°C and freeze 12h, then take it out and stir and dissolve at room temperature to obtain a more uniformly dispersed microcrystalline cellulose alkali urea solution;

[0054] The reaction time in step 3) is 10min.

Embodiment 3

[0056] A self-healing hydrogel for preparing cellulose-dopamine-polymer composites, the method is the same as in Example 1, except that:

[0057] Step 4) Add 30 mg of dopamine into the first mixed solution at room temperature, and then stir to obtain the second mixed solution;

[0058] The reaction time in step 3) is 20min.

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Abstract

The invention discloses self-healing hydrogel of a cellulose-dopamine-polymer composite material as well as a preparation method and application of the self-healing hydrogel. The preparation method disclosed by the invention comprises the following steps: 1) preparing a cellulose solution; 2) under a heating condition, dissolving epichlorohydrin into a cellulose solution and reacting to obtain a first mixed solution; 3) cooling; dissolving the dopamine into the first mixed solution to obtain a second mixed solution; 4) under an ice water bath, adding a polymer monomer into the second mixed solution; then adding an initiator, a double-cross-linking agent and a catalyst to obtain a third mixed solution; 5) molding the third mixed solution to obtain a product. The invention further disclosesapplication of the self-healing hydrogel. The self-healing hydrogel of the cellulose-dopamine-polymer composite material, disclosed by the invention, has the advantages of wide raw material source andbiodegradability and good electrical conductivity and mechanical performance; the preparation method is simple to operate and has relatively short reaction time, and the self-healing hydrogel has biocompatibility and biodegradability.

Description

technical field [0001] The invention relates to the field of hydrogel technology. More specifically, it relates to a self-healing hydrogel of cellulose-dopamine-polymer composite material and its preparation method and application. Background technique [0002] Traditional conductive materials include conductive plastics and conductive rubbers. Conductive plastics are functional polymer materials that are processed by mixing resin and conductive substances and processing them in the same way as plastics. Conductive rubber is to uniformly distribute conductive particles such as glass silver plating, aluminum silver plating, and silver in silicone rubber, and make the conductive particles contact through pressure to achieve a good conductive effect. But traditional conductive materials do not have the ability to repair and cannot be recycled. [0003] Therefore, it is necessary to provide a conductive material capable of repairing and recyclable. Contents of the invention...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/02C08F222/38C08F220/56H01G11/52H01B1/12
CPCC08F251/02H01B1/12H01B1/124H01G11/52C08F222/385C08F220/56Y02E60/13
Inventor 吴敏李丽媛王超鲁非雪黄勇
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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