Preparation and application of natural polymer binder capable of realizing photopolymerization

A natural polymer and adhesive technology, applied in the direction of dextran adhesives, adhesive types, chitin adhesives, etc., can solve the problems of adhesives that cannot be fast and degraded, and achieve easy operation , The effect of low preparation cost

Inactive Publication Date: 2010-10-27
HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention mainly solves the common problem that the currently commerc

Method used

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  • Preparation and application of natural polymer binder capable of realizing photopolymerization
  • Preparation and application of natural polymer binder capable of realizing photopolymerization
  • Preparation and application of natural polymer binder capable of realizing photopolymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Dissolve 8g of chitosan in 500mL of 2% acetic acid aqueous solution, then dissolve 28.8g of sodium dodecylsulfonate in 500mL of water, mix the two solutions, stir vigorously for 2 hours and then filter with suction. The product was washed three times with suction and then freeze-dried. Take 8 g of the freeze-dried product and dissolve it in 250 mL of dimethyl sulfoxide, put it into the reaction vessel after being completely dissolved, and then add 5 drops of the catalyst dibutyltin dilaurate. Add 8 g of ethyl methacrylate isocyanate into 100 mL of dimethyl sulfoxide, drop it into the reaction vessel through a constant pressure dropping funnel under nitrogen atmosphere, stir vigorously, and heat in a water bath at 35°C. Use FTIR to monitor the reaction progress in real time, when 2267cm -1 If the peak does not disappear within 20 minutes, the reaction ends and the dropwise addition is stopped. The reaction product was added into deionized water, and the precipitate was...

Embodiment 2

[0031] Dissolve 8 g of starch with 250 ml of dimethyl sulfoxide, put it into the reaction vessel after it is completely dissolved, and then add 8 drops of the catalyst dibutyltin dilaurate. Add 12 g of ethyl methacrylate isocyanate into 100 mL of dimethyl sulfoxide, drop it into the reaction vessel through a constant pressure dropping funnel under nitrogen atmosphere, stir vigorously, and heat in a water bath at 35°C. Use FTIR to monitor the reaction progress in real time, when 2267cm -1 If the peak does not disappear within 20 minutes, the reaction ends and the dropwise addition is stopped. The reaction product was added into deionized water, and the precipitate was filtered and washed several times to obtain the final product.

[0032] The product is diluted with dimethyl sulfoxide to make a solution of 50% by weight, and 1% of ultraviolet photoinitiator 2959 is added, at 30mW / cm 2 The point light source of light intensity was cured for 2 minutes, and the measured tensile ...

Embodiment 3

[0034] Dissolve 8 g of dextran with 250 ml of chloroform, put it into a reaction vessel after it is completely dissolved, and then add 8 drops of dibutyltin dilaurate as a catalyst. Then add 13 g of ethyl methacrylate isocyanate into 100 mL of dimethyl sulfoxide, drop it into the reaction vessel through a constant pressure dropping funnel under nitrogen atmosphere, stir vigorously, and heat in a water bath at 35°C. Use FTIR to monitor the reaction progress in real time, when 2267cm -1 If the peak does not disappear within 20 minutes, the reaction ends and the dropwise addition is stopped. The reaction product was added into deionized water, and the precipitate was filtered and washed several times to obtain the final product.

[0035] Product is diluted with dimethyl sulfoxide and is made into the solution of 75% by weight percentage, adds the ultraviolet photoinitiator 2959 of weight fraction 5%, at 30mW / cm 2 The point light source of light intensity was cured for 2 minutes...

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Abstract

The invention relates to a preparation method of a natural polymer binder capable of realizing photopolymerization. In the invention, the polarity of an urethano structure is applied, the urethano structure has very strong polarity, an introduced acrylate group has the advantages of photopolymerization as well as high speed, environment protection, and the like of the photopolymerization, and a natural polymer can be degraded in a human body. Therefore, the urethano structure and the acrylate structure are combined in the natural polymer to form the novel natural polymer binder capable of realizing photopolymerization, and the novel natural polymer binder can be applied to various surfaces.

Description

technical field [0001] The invention relates to the preparation of a light-curable natural polymer adhesive, which belongs to the field of adhesives. Background technique [0002] Photopolymerization technology is a new green technology that developed rapidly in the 20th century. Photocuring technology has the advantages of high efficiency, wide adaptability, economy, energy saving and environmental friendliness. These advantages endow photopolymerization technology with excellent application prospects in the field of adhesives. [0003] Due to the toxicity of isocyanates to cells in vivo, its application in the human body is limited. Therefore, the isocyanate can be reacted with the polymer prepolymer in vitro to introduce urethane groups on the polymer. Utilizing the polar interaction between the urethane group and the substrate, it can achieve a good adhesion effect. [0004] Natural polymers have excellent biocompatibility, bioactivity, biodegradability, broad-spectru...

Claims

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Application Information

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IPC IPC(8): C08B37/08C08B31/00C08B37/02C09J105/08C09J103/04C09J105/02
Inventor 杨冬芝李海波聂俊马贵平
Owner HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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