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Method for improving water resistance and flexibility of polyvinyl alcohol film by polytrimethylene carbonate and polycaprolactone

A technology of polytrimethylene carbonate and methyl carbonate, which is applied in the field of polymer film preparation, can solve the problems of lack of water resistance and flexibility, hydrophilic stiffness of polyvinyl alcohol film, etc., and achieve easy to grasp, water resistance And the effect of improved flexibility and easy operation

Inactive Publication Date: 2016-06-08
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polyvinyl alcohol is a biomaterial with good biocompatibility and biodegradability. Polyvinyl alcohol film can be used as artificial skin, etc., but the hydrophilicity of polyvinyl alcohol film is too strong and stiff, and lacks good Water resistance and flexibility, which limits its application to some extent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1) Preparation of polyvinyl alcohol-polytrimethylene carbonate graft copolymer

[0018] Add 18 grams of polyvinyl alcohol (molecular weight: 84,000) and 9.7 grams of carboxy-terminated polytrimethylene carbonate monododecyl ether (molecular weight: 2,600) to the dry reactor, add 260 ml of dimethyl sulfoxide, and then add 0.056 gram N,N' -Dicyclohexylcarbodiimide, under an inert atmosphere, stirred and reacted at 29°C for 2 days, terminated the reaction, obtained the target product by filtration, dialysis, and drying;

[0019] 2) Preparation of polyvinyl alcohol-polytrimethylene carbonate-polycaprolactone double graft copolymer

[0020] Add 10 grams of polyvinyl alcohol-polytrimethylene carbonate graft copolymer and 4.5 grams of carboxy-terminated polycaprolactone monolauryl ether (molecular weight is 2000) in the dry reactor, add 144ml dimethyl sulfoxide , then add 0.031 g N,N' -Dicyclohexylcarbodiimide, under an inert atmosphere, stirred and reacted at 29°C for 2 da...

Embodiment 2

[0025] 1) Preparation of polyvinyl alcohol-polytrimethylene carbonate graft copolymer

[0026] Add 18.2 grams of polyvinyl alcohol (molecular weight: 88,000) and 9.8 grams of carboxy-terminated polytrimethylene carbonate monododecyl ether (molecular weight: 2,600) to the dry reactor, add 272 ml of dimethyl sulfoxide, and then add 0.034 gram N,N' -Diisopropylcarbodiimide, stirred and reacted at 32°C for 3 days under an inert atmosphere, terminated the reaction, and obtained the target product by filtration, dialysis, and drying;

[0027] 2) Preparation of polyvinyl alcohol-polytrimethylene carbonate-polycaprolactone double graft copolymer

[0028] Add 10.3 grams of polyvinyl alcohol-polytrimethylene carbonate graft copolymer and 4.4 grams of carboxy-terminated polycaprolactone monolauryl ether (molecular weight is 2100) in the dry reactor, add 145ml dimethyl sulfoxide , then add 0.019 g N,N' -Diisopropylcarbodiimide, stirred and reacted at 32°C for 3 days under an inert atmo...

Embodiment 3

[0033] 1) Preparation of polyvinyl alcohol-polytrimethylene carbonate graft copolymer

[0034] Add 18.3 grams of polyvinyl alcohol (molecular weight: 92,000) and 10.2 grams of carboxy-terminated polytrimethylene carbonate monododecyl ether (molecular weight: 2,700) to the dry reactor, add 264 ml of dimethyl sulfoxide, and then add 0.051 g of 3-ethyl-1-(3-dimethylaminopropyl)carbodiimide, under an inert atmosphere, stirred and reacted at 35°C for 2 days, terminated the reaction, and obtained the target product by filtration, dialysis, and drying;

[0035] 2) Preparation of polyvinyl alcohol-polytrimethylene carbonate-polycaprolactone double graft copolymer

[0036] Add 10 grams of polyvinyl alcohol-polytrimethylene carbonate graft copolymer and 4.7 grams of carboxy-terminated polycaprolactone monolauryl ether (molecular weight is 2300) in the dry reactor, add 146ml dimethyl sulfoxide , then add 0.027 g of 3-ethyl-1-(3-dimethylaminopropyl) carbodiimide, under an inert atmospher...

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PUM

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Abstract

The invention discloses a method for improving water resistance and flexibility of a polyvinyl alcohol film by polytrimethylene carbonate and polycaprolactone. The method includes the steps of 1), adding carboxyl-terminated polytrimethylene carbonate monododecyl ether, a solvent, a condensing agent and polyvinyl alcohol into a dry reactor and reacting to obtain a polyvinyl alcohol-polytrimethylene carbonate grafted copolymer; 2), adding the polyvinyl alcohol-polytrimethylene carbonate grafted copolymer, carboxyl-terminated polycaprolactone monododecyl ether, the solvent and the condensing agent into the dry reactor and reacting to obtain a polyvinyl alcohol-polytrimethylene carbonate-polycaprolactone double-grafted copolymer; 3) adding the polyvinyl alcohol-polytrimethylene carbonate-polycaprolactone double-grafted copolymer, the polytrimethylene carbonate monododecyl ether and the solvent into the dry reactor, and mixing to form the film so as to obtain a target object. The method for improving the water resistance and the flexibility of the polyvinyl alcohol film by the polytrimethylene carbonate and the polycaprolactone is simple in preparation process and easy to master, and the water resistance and the flexibility of the obtained modified film are improved greatly.

Description

technical field [0001] The invention relates to a method for improving the water resistance and flexibility of a polyvinyl alcohol film, belonging to the technical field of polymer film preparation. Background technique [0002] Polyvinyl alcohol is a biomaterial with good biocompatibility and biodegradability. Polyvinyl alcohol film can be used as artificial skin, etc., but the hydrophilicity of polyvinyl alcohol film is too strong and stiff, and lacks good Water resistance and flexibility, which limits its application to some extent. Polytrimethylene carbonate and polycaprolactone are biomaterials with excellent biocompatibility and biodegradability, good hydrophobicity and flexibility. First, the polytrimethylene carbonate segment is introduced into the polyvinyl alcohol segment to form a polyvinyl alcohol-polytrimethylene carbonate graft copolymer, and then the polycaprolactone segment is introduced into the polyvinyl alcohol-polytrimethylene carbonate graft copolymer. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L87/00C08L69/00C08J5/18C08G81/02
CPCC08L87/005C08G81/027C08G2230/00C08J5/18C08J2387/00C08J2469/00C08L2201/06C08L2203/16C08L69/00
Inventor 申红望朱国全
Owner SHANDONG UNIV OF TECH
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