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Preparation method of photoresponsive cellulose nanocrystal/fluorine-containing polyacrylate self-healing material

A technology of polyacrylate and self-healing material is applied in the field of preparation of light-responsive cellulose nanocrystal/fluorine-containing polyacrylate self-healing material to achieve the effects of improving stability, good biodegradability and abundant raw materials

Active Publication Date: 2021-03-05
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the preparation of smart materials with self-healing function by Pickering emulsion polymerization.

Method used

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  • Preparation method of photoresponsive cellulose nanocrystal/fluorine-containing polyacrylate self-healing material
  • Preparation method of photoresponsive cellulose nanocrystal/fluorine-containing polyacrylate self-healing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Step 1. Mix the modified cellulose nanocrystals, water, and mixed monomers with a mass ratio of 0.01:20:1, and emulsify with an ultrasonic cell pulverizer for 25 minutes to obtain a stable milky white Pickering emulsion.

[0043] Step 2.1, Transfer the Pickering emulsion to a three-necked flask equipped with a stirrer, a reflux condenser, and an argon inlet tube;

[0044] Step 2.2. Place the three-necked flask in a water bath, and at a stirring speed of 100r / min, pass argon gas into the three-necked flask through the argon gas inlet tube for 20 minutes; after heating to 70°C, dropwise add a concentration of 1.5wt within 30 minutes % azobisisobutylamidine hydrochloride initiator aqueous solution, after the dropwise addition is completed, keep warm for 2 hours, and the reaction ends;

[0045] Step 2.3, cooling the reactants in the three-necked flask to room temperature; the filtrate obtained by filtering is a photoresponsive cellulose nanocrystal / fluorine-containing polya...

Embodiment 2

[0049] Step 1. Mix the modified cellulose nanocrystals, water and mixed monomers with a mass ratio of 0.02:25:1, and emulsify with an ultrasonic cell pulverizer for 30 minutes to obtain a stable milky white Pickering emulsion.

[0050] Step 2.1, Transfer the Pickering emulsion to a three-necked flask equipped with a stirrer, a reflux condenser, and an argon inlet tube;

[0051] Step 2.2. Place the three-necked flask in a water bath, and at a stirring speed of 150r / min, pass argon gas into the three-necked flask through the argon gas inlet tube for 25 minutes; after heating up to 75°C, add dropwise a concentration of 3wt% within 60 minutes Azobisisobutylamidine hydrochloride initiator aqueous solution, after the dropwise addition is completed, the insulation reaction is carried out for 3h, and the reaction ends;

[0052] Step 2.3, cooling the reactants in the three-necked flask to room temperature; the filtrate obtained by filtering is a photoresponsive cellulose nanocrystal / fl...

Embodiment 3

[0056] Step 1. Mix the modified cellulose nanocrystals, water and mixed monomers with a mass ratio of 0.03:30:1, and emulsify with an ultrasonic cell pulverizer for 30 minutes to obtain a stable milky white Pickering emulsion.

[0057] Step 2.1, Transfer the Pickering emulsion to a three-necked flask equipped with a stirrer, a reflux condenser, and an argon inlet tube;

[0058] Step 2.2. Place the three-necked flask in a water bath, and at a stirring speed of 200r / min, pass argon gas into the three-necked flask through the argon gas inlet tube for 30 minutes; after heating up to 80°C, add a concentration of 6wt% within 90 minutes. Azobisisobutylamidine hydrochloride initiator aqueous solution, after the dropwise addition is completed, the insulation reaction is carried out for 4h, and the reaction ends;

[0059] Step 2.3, cooling the reactants in the three-necked flask to room temperature; the filtrate obtained by filtering is a photoresponsive cellulose nanocrystal / fluorine-c...

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Abstract

A method for preparing a light-responsive cellulose nanocrystal / fluorine-containing polyacrylate self-repairing material, specifically implemented according to the following steps: Step 1, preparing Pickering emulsion; grafting and modifying light-responsive amphiphilic block copolymer Cellulose nanocrystals, water, and mixed monomers are mixed uniformly according to the mass ratio of 0.01~0.03:2~60:1~3 to obtain Pickering emulsion; step 2, preparing photoresponsive cellulose nanocrystals / fluorine-containing polyacrylate composite emulsion . Photoresponsive cellulose nanocrystals / fluorine-containing polyacrylate self-healing material has the characteristics of self-healing.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of polymer materials, and in particular relates to a preparation method of a photoresponsive cellulose nanocrystal / fluorine-containing polyacrylate self-repairing material. Background technique [0002] During the construction and use of polymer materials, due to stimuli such as temperature changes in the environment, ultraviolet radiation, and mechanical stress, cracks or defects are prone to occur inside the material, reducing the mechanical properties of the material, and even making the material lose its original function. Inspired by the self-healing function of organisms, people have designed and prepared artificial self-healing materials that can repair damage to improve the service life and functional stability of materials. [0003] According to whether embedding of repair agent is needed in the preparation process of self-healing materials, self-healing materials can be divid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/24C08F220/14C08F220/32C08F2/30
CPCC08F2/30C08F220/14C08F220/24C08F220/32
Inventor 周建华李红南雪魏美娜王雪丽
Owner SHAANXI UNIV OF SCI & TECH
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