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

A technology of polytrimethylene carbonate and polylactic acid glycolic acid, 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 and water resistance And the effect of improved flexibility and easy operation

Inactive Publication Date: 2018-07-10
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: 83,000) and 10 grams of carboxy-terminated polytrimethylene carbonate monolauryl ether (molecular weight: 2,500) into the dry reactor, add 260 ml dimethyl sulfoxide, and then add 0.056 grams N,N' -Dicyclohexylcarbodiimide, stirred and reacted at 30°C for 2 days under an inert atmosphere, terminated the reaction, and obtained the target product by filtration, dialysis, and drying;

[0019] 2) Preparation of polyvinyl alcohol-polytrimethylene carbonate-polylactic acid glycolic acid double graft copolymer

[0020] Add 10 grams of polyvinyl alcohol-polytrimethylene carbonate graft copolymer and 4.6 grams of carboxy-terminated poly(lactic-co-glycolic acid) monolauryl ether (molecular weight: 2100) into the dry reactor, add 144 ml of dimethylmethylene Sulfone, add 0.031 g N,N' -Dicyclohexylcarbodiimide, stirred and reacted at 30°C for...

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: 2,700) to the dry reactor, add 265 ml of dimethyl sulfoxide, and then add 0.032 grams 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-polylactic acid glycolic acid double graft copolymer

[0028] Add 10.3 grams of polyvinyl alcohol-polytrimethylene carbonate graft copolymer and 4.6 grams of carboxy-terminated poly(lactic acid glycolic acid monododecyl ether) (molecular weight: 2200) into the dry reactor, add 143 ml of dimethylmethylene Sulfone, add 0.019 g N,N' -Diisopropylcarbodiimide, stirred and reacted at ...

Embodiment 3

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

[0034] Add 18.3 grams of polyvinyl alcohol (molecular weight: 93,000) and 10.3 grams of carboxy-terminated polytrimethylene carbonate monolauryl ether (molecular weight: 2,800) into the dry reactor, add 263 ml of dimethyl sulfoxide, and then add 0.049 g of 3-ethyl-1-(3-dimethylaminopropyl) carbodiimide was stirred and reacted at 34°C for 2 days under an inert atmosphere, the reaction was terminated, and the target product was obtained by filtration, dialysis and drying;

[0035] 2) Preparation of polyvinyl alcohol-polytrimethylene carbonate-polylactic acid glycolic acid double graft copolymer

[0036] Add 10 grams of polyvinyl alcohol-polytrimethylene carbonate graft copolymer and 4.4 grams of carboxy-terminated poly(lactic-co-glycolic acid) monolauryl ether (molecular weight: 2200) into the dry reactor, add 141 ml of dimethylmethylene Sulfone, then add 0.027 g of 3-ethyl-1-(3-dimethylamin...

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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 by using polytrimethylene carbonate and polylactic acid glycolic acid. The following steps are adopted: 1) adding carboxyl-terminated polytrimethylene carbonate to the reactor Ester monolauryl ether, solvent, condensing agent and polyvinyl alcohol, react to obtain polyvinyl alcohol-polytrimethylene carbonate graft copolymer; 2) add polyvinyl alcohol-polytrimethylene carbonate to the reactor Graft copolymer, carboxyl-terminated poly(lactic-co-glycolic acid monododecyl ether), solvent and condensing agent, react to obtain polyvinyl alcohol-polytrimethylene carbonate-poly(lactic-co-glycolic acid) double graft copolymer; 3) Reaction Add polyvinyl alcohol-polytrimethylene carbonate-polylactic acid glycolic acid double-graft copolymer, polytrimethylene carbonate monolauryl ether and solvent into the vessel, mix and form a film 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 poly(D,L-lactic) glycolic acid (90 / 10 weight ratio of lactic acid to glycolic acid) are biomaterials with excellent biocompatibility and biodegradability, and have 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 polylactic acid glycolic acid seg...

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 申红望朱国全
Owner SHANDONG UNIV OF TECH
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