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A kind of preparation method of cellulose-based self-healing gel

A cellulose and nanocellulose technology, applied in the field of preparation of cellulose-based self-healing gel, can solve the problems of unsatisfactory self-healing speed and high cost, and achieve the effect of improving self-healing efficiency and low cost

Active Publication Date: 2020-12-08
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing self-healing gels have the problems of high cost and unsatisfactory self-healing speed

Method used

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  • A kind of preparation method of cellulose-based self-healing gel
  • A kind of preparation method of cellulose-based self-healing gel

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preparation example Construction

[0019] A preparation method of cellulose-based self-healing gel of the present invention, the preparation method comprises the following specific operation steps:

[0020] (1) Get 2-ethylaminoethanol and carbon disulfide to react under chloroform, iodine and ice bath conditions (reaction equation is as follows formula one), obtain disulfide thiuram diol (Thiuramdisulfidediol);

[0021] (2) The thiuram disulfide diol that step (1) makes is dissolved in the dimethylformamide solution, and adds nano-cellulose, triethanolamine, diisocyanate compound, dibutyltin dilaurate to carry out polymerization Addition reaction (the reaction equation is shown in Equation 2), and the product obtained from the reaction is the cellulose-based self-healing gel.

[0022] Among them, the molar ratio of 2-ethylaminoethanol to carbon disulfide is 3-1:1, and preferably 2:1; the mass ratio of thiuram disulfide to nanocellulose is 0.5-5:1; triethanolamine and nano-cellulose The mass ratio of cellulose ...

Embodiment 1

[0029] (1) Get 2-ethylaminoethanol and carbon disulfide to react under chloroform, iodine and ice bath conditions, obtain the crude product of thiuram disulfide, pass column (silica gel, hexane / ethyl acetate=3 / 2, v / v), obtain the higher thiuram disulfide diol of purity;

[0030] (2) Take 0.5910g of thiuram diol disulfide prepared in this example and dissolve it in 2.2mL of N,N-dimethylformamide, then add 0.8748g of nanocellulose, 0.1490mg of triethanolamine, and 100μL of dilaurel Dibutyltin dibutyltin and 1.0100g of hexamethylene diisocyanate were subjected to a polyaddition reaction, and the product obtained from the reaction was the cellulose-based self-healing gel.

Embodiment 2

[0032] (1) Get 2-ethylaminoethanol and carbon disulfide to react under chloroform, iodine and ice bath conditions, obtain the crude product of thiuram disulfide, pass column (silica gel, hexane / ethyl acetate=3 / 2, v / v), obtain the higher thiuram disulfide diol of purity;

[0033] (2) Take 0.5910g of thiuram diol disulfide prepared in this example and dissolve it in 2.2mL of N,N-dimethylformamide, then add 0.4374g of nanocellulose, 0.1490mg of triethanolamine, and 100μL of dilaurel Dibutyltin dibutyltin and 1.0100g of hexamethylene diisocyanate were subjected to a polyaddition reaction, and the product obtained from the reaction was the cellulose-based self-healing gel.

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Abstract

The invention provides a preparation method of a cellulose-based self-healing gel. The preparation method comprises the following steps: firstly, taking 2-diethylaminoethanol and carbon disulfide to react under the conditions of chloroform, iodine and ice bath, so as to obtain thiuram disulfide diol; dissolving the prepared thiuram disulfide diol in dimethylformamide solution, then adding the nano-cellulose, triethanolamine, diisocyanate compound and dibutyltin dilaurate to perform polyaddition reaction, and the obtained product being the cellulose-based self-healing gel. The cellulose-based self-healing gel prepared by the invention has low cost, safe and environmental-protection property, the self-healing effect can be rapidly achieved while the self-healing efficiency is improved.

Description

【Technical field】 [0001] The invention belongs to the field of functional materials, and in particular relates to a preparation method of cellulose-based self-healing gel. 【Background technique】 [0002] Self-healing gel, which can automatically repair the damage after being damaged by external force, restore its structural integrity, mechanical properties and other functions, thereby prolonging the service life of the material; self-healing gel is usually used for drug delivery , tissue engineering, and biosensors. Currently, self-healing gels are usually prepared through hydrophobic interactions, hydrogen bonds, host-guest interactions, and dynamic covalent bonds. [0003] As the most abundant renewable resource on earth, cellulose has become a good material for the preparation of gels due to its biodegradability, biocompatibility, safety and non-toxicity. Such as nanocellulose-polyvinyl alcohol-borax system (SpoljaricS, etal. European Polymer Journal, 2014, 56 (7): 105-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/73C08G18/76C08G18/64C08G18/32
CPCC08G18/3281C08G18/3863C08G18/6484C08G18/6535C08G18/73C08G18/7614C08G18/7671
Inventor 吴慧李文焰肖禾曹石林黄六莲陈礼辉
Owner FUJIAN AGRI & FORESTRY UNIV