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A kind of preparation method of cellulose-based shape memory material

A memory material, cellulose-based technology, applied in the field of preparation of cellulose-based shape memory materials, can solve the problems of strict conditions, not widely used, cumbersome process, etc.

Active Publication Date: 2021-04-09
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, many scientists have successfully prepared biomass-based shape memory materials, but due to the cumbersome preparation process and strict conditions, they have not been widely used.

Method used

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  • A kind of preparation method of cellulose-based shape memory material
  • A kind of preparation method of cellulose-based shape memory material
  • A kind of preparation method of cellulose-based shape memory material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Preparation of cellulose-based shape memory materials using ethyl cellulose

[0024] Step 1: Add 1g (4.57mmol) of ethyl cellulose and 0.462g (4.57mmol) of triethylamine into a flask to dissolve in tetrahydrofuran, add dropwise 0.68g (4.57mmol) of methacrylic anhydride, and react at 50°C for 3h. Obtain ethyl cellulose macromer;

[0025] Step 2: Add 0.2g of cellulose macromer, 5.82g of butyl acrylate, 3.88g of methyl methacrylate, and 0.1g of initiator AIBN into a round-bottomed flask and mix them. After fully dissolved, vacuum degassing, and then at 80°C The ethyl cellulose-based shape memory material was prepared by reacting for 3h.

Embodiment 2

[0026] Example 2: Preparation of cellulose-based shape memory materials using ethyl cellulose

[0027] Step 1: Add 1g (4.57mmol) of ethyl cellulose and 0.557g (4.57mmol) of 4-dimethylaminopyridine into a flask to dissolve in tetrahydrofuran, add 0.34g (2.285mmol) of methacrylic anhydride dropwise, and heat at 50°C Under reaction 3h, make ethyl cellulose macromer;

[0028] Step 2: Add 0.3g of cellulose macromer, 6.685g of butyl acrylate, 2.865g of methyl methacrylate, and 0.15g of initiator BPO into a round-bottomed flask for mixing. After fully dissolving, vacuum degassing, and then at 70°C The ethyl cellulose-based shape memory material was prepared by reacting for 4h.

Embodiment 3

[0029] Example 3: Preparation of cellulose-based shape memory materials using ethyl cellulose

[0030] Step 1: Add 1g (4.57mmol) of ethyl cellulose and 1.114g (9.14mmol) of 4-dimethylaminopyridine into the flask and dissolve it with N,N-dimethylformamide, then add 0.68g of methacrylic anhydride dropwise (4.57mmol), reacted at 60°C for 5h to obtain ethyl cellulose macromer;

[0031] Step 2: Add 0.3g of cellulose macromer, 6.685g of lauryl methacrylate, 2.865g of tetrahydrofurfuryl methacrylate, and 0.1g of initiator AIBN into a round-bottomed flask for mixing, dissolve fully and then vacuum degas , and then reacted at 100°C for 3h to prepare ethylcellulose-based shape memory materials.

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Abstract

The invention relates to a preparation method of a cellulose-based shape memory material, comprising the following steps: the first step: reacting cellulose, methacrylic anhydride and a catalyst at 30-80°C for 1-10 hours to prepare a cellulose-based macromolecular unit The second step: mix the macromer, monomer A, monomer B, and initiator according to a certain mass ratio, dissolve fully and then vacuum degas, then react at 50-120°C for 1-5 hours to prepare cellulose-based shape memory materials. The preparation of the shape memory material by the method has the advantages of simple operation, fast and high efficiency, no chemical solvent, environmental protection and the like.

Description

technical field [0001] The invention relates to a preparation method of a cellulose-based shape memory material. Background technique [0002] With the increasing consumption of fossil raw materials, the use of renewable resources to prepare high molecular weight polymers has received great attention. Cellulose is the most productive biomass resource in the world. It has been widely used in synthetic plastics, coatings, rubber substitutes, inks, insulating materials, adhesives, and textile finishing agents. [0003] Shape-memory polymer materials refer to polymer materials that change their initial shape and fix under certain conditions, and can restore their original shape through stimulation by external conditions (such as heat, light, electricity, chemical induction), etc. Material. At present, shape memory polymer material, as a new type of intelligent material, has been widely used in construction, aerospace, medicine and health and other fields. In order to expand t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F285/00C08F220/18C08F220/28C08F220/14C08F212/08C08F251/02C08F220/08
CPCC08F251/02C08F285/00C08F220/08C08F220/1812C08F220/281C08F220/1804
Inventor 王基夫卢传巍王春鹏储富祥
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY