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A method for improving the water resistance and flexibility of polyvinyl alcohol film with polypeptide and polytrimethylene carbonate

A technology of methyl carbonate and polyvinyl alcohol film, 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 grasp, water resistance and flexibility Enhanced performance and easy operation

Inactive Publication Date: 2018-07-13
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

[0014] 1) Preparation of polyvinyl alcohol-polypeptide-polytrimethylene carbonate double graft copolymer

[0015] Add 18 g of polyvinyl alcohol (molecular weight: 85,000), 9.3 g of carboxy-terminated poly(r-benzyl-L-glutamate) (molecular weight: 2,500) and 9.2 g of carboxyl-terminated polytrimethylene to a dry reactor Base carbonate monolauryl ether (molecular weight is 2500), add 340 ml dimethyl sulfoxide, then add 0.056 g N,N' -Dicyclohexylcarbodiimide, under an inert atmosphere, stirred and reacted at 25°C for 2 days, terminated the reaction, and obtained the target product by filtration, dialysis, and drying;

[0016] 2) Preparation of Polyvinyl Alcohol Membrane Modified by Polypeptide and Polytrimethylene Carbonate

[0017] Add 10 grams of polyvinyl alcohol-polypeptide-polytrimethylene carbonate double graft copolymer and 37ml dimethyl sulfoxide solvent in the dry reactor, and add polytrimethylene which accounts for 2% of the total weight of the modified membrane Carbon...

Embodiment 2

[0020] 1) Preparation of polyvinyl alcohol-polypeptide-polytrimethylene carbonate double graft copolymer

[0021] Add 21.5 g of polyvinyl alcohol (molecular weight: 87,000), 11.3 g of carboxy-terminated poly(r-ethyl-L-glutamate) (molecular weight: 2,600) and 11.4 g of carboxyl-terminated polytrimethylene to a dry reactor Carbonate monolauryl ether (molecular weight 2600), add 410 ml dimethyl sulfoxide, then add 0.039 g N,N' -Diisopropylcarbodiimide, stirred and reacted at 30°C for 3 days under an inert atmosphere, terminated the reaction, and obtained the target product by filtration, dialysis, and drying;

[0022] 2) Preparation of Polyvinyl Alcohol Membrane Modified by Polypeptide and Polytrimethylene Carbonate

[0023] Add 10 grams of polyvinyl alcohol-polypeptide-polytrimethylene carbonate double graft copolymer and 36ml dimethyl sulfoxide solvent in the drying reactor, and add polytrimethylene which accounts for 3% of the total weight of the modified membrane Carbonate ...

Embodiment 3

[0026] 1) Preparation of polyvinyl alcohol-polypeptide-polytrimethylene carbonate double graft copolymer

[0027] Add 22 g of polyvinyl alcohol (molecular weight: 90,000), 12 g of carboxy-terminated poly(r-methyl-L-glutamate) (molecular weight: 2,700) and 12.1 g of carboxy-terminated polytrimethylene to a dry reactor Carbonate monolauryl ether (molecular weight 2700), add 430 ml dimethyl sulfoxide, then add 0.061 g 3-ethyl-1-(3-dimethylaminopropyl) carbodiimide, inert atmosphere , stirred and reacted at 35°C for 2 days, terminated the reaction, and obtained the target product by filtration, dialysis, and drying;

[0028] 2) Preparation of Polyvinyl Alcohol Membrane Modified by Polypeptide and Polytrimethylene Carbonate

[0029] Add 9.5 grams of polyvinyl alcohol-polypeptide-polytrimethylene carbonate double graft copolymer and 35ml of dimethyl sulfoxide solvent in the dry reactor, and add polytrimethylene which accounts for 4% of the total weight of the modified membrane Car...

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PUM

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Abstract

The invention discloses a method for improving the water resistance and flexibility of polyvinyl alcohol film with polypeptide and polytrimethylene carbonate. The following steps are adopted: 1) double graft copolymerization of polyvinyl alcohol-polypeptide-polytrimethylene carbonate Synthesis of the product: add carboxyl-terminated polypeptide homopolymer, carboxyl-terminated polytrimethylene carbonate monododecyl ether, solvent, condensing agent and polyvinyl alcohol into a dry reactor, and react at 25-35 °C After 2 to 3 days, the target substance is obtained by filtration, dialysis, and drying; 2) Preparation of polyvinyl alcohol film modified by polypeptide and polytrimethylene carbonate: add polyvinyl alcohol-polypeptide-into the drying reactor Polytrimethylene carbonate double-graft copolymer, polytrimethylene carbonate monododecyl ether and solvent are mixed at 47-50°C for 50-60 minutes, then cast into a film and dried to obtain this product object of invention. The preparation process of the invention is simple and easy to master, and the water resistance and flexibility of the obtained modified membrane are greatly improved.

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. Polypeptide is a biomaterial with excellent biocompatibility and biodegradability, and has excellent hydrophobicity. Polytrimethylene carbonate is a biomaterial with excellent biocompatibility and biodegradability, and has good hydrophobicity and flexibility. First, the polypeptide segment and the polytrimethylene carbonate segment are simultaneously introduced into the polyvinyl alcohol segment to form a polyvinyl alcohol-polypeptide-polytr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L87/00C08L69/00C08G81/02C08J5/18
CPCC08G81/027C08J5/18C08J2387/00C08J2469/00C08L87/005C08L2203/16C08L69/00
Inventor 朱国全
Owner SHANDONG UNIV OF TECH