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Method for modifying water resistance and flexibility of polyvinyl alcohol membrane through poly(trimethylene carbonate) and poly(p-dioxanone)

A technology of polydioxanone 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 Enhanced flexibility and flexibility, easy operation

Inactive Publication Date: 2016-05-04
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 355ml dimethylsulfoxide, then add 0.055g 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 37ml dimethyl sulfoxide solvent in the drying reactor, and add another 2% of the total weight of the modified membrane Polydioxanone monotridec...

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 443ml dimethylsulfoxide, then add 0.038g 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 36ml dimethyl sulfoxide solvent in the drying reactor, and add another 3% of the total weight of the modified membrane Polydioxanone ...

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 453ml dimethylsulfoxide, then add 0.058g 3-ethyl-1-(3-dimethylaminopropyl) carbodiimide, under inert atmosphere, The reaction was stirred at 34°C for 4 days, the reaction was terminated, and the target product was obtained 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 35ml dimethyl sulfoxide solvent in the drying reactor, add another 4% of the total weight of the modified membrane Polydioxanon...

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PUM

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Abstract

The invention discloses a method for modifying the water resistance and flexibility of a polyvinyl alcohol membrane through poly(trimethylene carbonate) and poly(p-dioxanone). The method includes the following steps of firstly, adding poly(trimethylene carbonate) monododecyl ether with the end sealed by a carboxyl group, poly(p-dioxanone) monotridecyl ether with the end sealed by a carboxyl group, solvent, condensing agent and polyvinyl alcohol into a drying reactor to be stirred and react for 2-4 days at a temperature of 31-34 DEG C to obtain polyvinyl alcohol, poly(trimethylene carbonate) and poly(p-dioxanone) double-draft copolymers; secondly, adding the polyvinyl alcohol, poly(trimethylene carbonate) and poly(p-dioxanone) double-draft copolymers, poly(p-dioxanone) monotridecyl ether and solvent into the drying reactor to be stirred and mixed for 50-60 minutes at a temperature of 48-53 DEG C, and forming the membrane and drying the membrane to obtain the target object. The method is simple in preparation process and easy to grasp, and the water resistance and flexibility of the 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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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