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

A technology of polydioxanone and methyl carbonate, which is applied in the field of polymer film preparation, can solve the problems of polyvinyl alcohol film's hydrophilic stiffness, lack of water resistance and flexibility, etc., and achieve easy to grasp, water resistance Enhanced flexibility and flexibility, 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-polytrimethylene carbonate-polydioxanone double graft copolymer

[0015] Add 18.1 g of polyvinyl alcohol (molecular weight: 87,000), 10.1 g of carboxy-terminated polytrimethylene carbonate monolauryl ether (molecular weight: 2,600) and 10.1 g of carboxyl-terminated polydioxane into the dry reactor Ketone monotridecyl ether (molecular weight 2600), add 355 ml dimethyl sulfoxide, then add 0.055 g N,N' - Dicyclohexylcarbodiimide, under an inert atmosphere, stirred and reacted at 31°C for 2 days, terminated the reaction, obtained the target product by filtration, dialysis, and drying;

[0016] 2) Preparation of polyvinyl alcohol film modified by polytrimethylene carbonate and polydioxanone

[0017] Add 10 grams of polyvinyl alcohol-polytrimethylene carbonate-polydioxanone double-graft copolymer and 37 ml of dimethyl sulfoxide solvent in the dry reactor, and add 2 % of poly-p-dioxanone monotridecyl ether (molecular weight: 2600), under a...

Embodiment 2

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

[0021] Add 21.6 grams of polyvinyl alcohol (molecular weight: 89,000), 11.8 grams of carboxy-terminated polytrimethylene carbonate monolauryl ether (molecular weight: 2,700) and 11.8 grams of carboxy-terminated polydioxane to the dry reactor Ketone monotridecyl ether (molecular weight 2700), add 443 ml dimethyl sulfoxide, then add 0.038 g 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;

[0022] 2) Preparation of polyvinyl alcohol film modified by polytrimethylene carbonate and polydioxanone

[0023] Add 10 grams of polyvinyl alcohol-polytrimethylene carbonate-polydioxanone double-graft copolymer and 36 ml of dimethyl sulfoxide solvent in the drying reactor, and add 3 % of poly-p-dioxanone monotridecyl ether (molecular weight 27...

Embodiment 3

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

[0027] Add 22.1 grams of polyvinyl alcohol (molecular weight: 93000), 12 grams of carboxy-terminated polytrimethylene carbonate monolauryl ether (molecular weight: 2700) and 12 grams of carboxyl-terminated polydioxane Ketone monotridecyl ether (molecular weight: 2700), add 453 ml dimethyl sulfoxide, then add 0.058 g 3-ethyl-1-(3-dimethylaminopropyl) carbodiimide, under inert atmosphere , stirred and reacted at 34°C for 4 days, terminated the reaction, and obtained the target product by filtration, dialysis, and drying;

[0028] 2) Preparation of polyvinyl alcohol film modified by polytrimethylene carbonate and polydioxanone

[0029] Add 9.5 grams of polyvinyl alcohol-polytrimethylene carbonate-polydioxanone double-graft copolymer and 35 ml of dimethyl sulfoxide solvent in the dry reactor, and add 4 % of poly-p-dioxanone monotridecyl ether (molecular weight 2700), unde...

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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 polytrimethylene carbonate and polydioxanone. The following steps are adopted: 1) adding carboxyl-terminated polytrimethylene into a drying reactor Carbonate monododecyl ether, carboxyl-terminated polydioxanone monotridecyl ether, solvent, condensing agent and polyvinyl alcohol, stirred and reacted at 31-34°C for 2-4 days to obtain poly Vinyl alcohol-polytrimethylene carbonate-polydioxanone double graft copolymer; 2) Add polyvinyl alcohol-polytrimethylene carbonate-polydioxanone bis The graft copolymer, polydioxanone monotridecyl ether and solvent are stirred and mixed at 48-53° C. for 50-60 minutes, then formed into a film and dried to obtain the object of the present 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. Polytrimethylene carbonate and polydioxanone are biomaterials with excellent biocompatibility and biodegradability, good hydrophobicity and flexibility. First, the polytrimethylene carbonate segment and the polydioxanone segment are simultaneously introduced into the polyvinyl alcohol segment to form polyvinyl alcohol-polytrimethylene carbonate-polydioxanone double graft copolymerization and then adding the polydioxanone segment into polyvin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L87/00C08L67/04C08G81/02C08J5/18
CPCC08G81/027C08G2230/00C08J5/18C08J2387/00C08J2467/04C08L87/005C08L2201/06C08L2203/16C08L67/04
Inventor 朱国全
Owner SHANDONG UNIV OF TECH
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