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Method for improving water resistance and flexibility of polyacrylic acid membrane through poly trimethylene carbonate and poly lactic acid-glycolic acid

A technology of polylactic acid glycolic acid and methyl carbonate, which is applied in the field of polymer film preparation, can solve the problems of hydrophilic stiffness, lack of water resistance and flexibility of polyacrylic acid film, and achieve easy grasp, water resistance and flexibility Enhanced, easy-to-operate effects

Inactive Publication Date: 2017-08-18
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polyacrylic acid is a biomaterial with good biocompatibility and biodegradability. Polyacrylic acid film can be used as artificial skin, etc., but polyacrylic acid film is too hydrophilic and stiff, and lacks good water resistance. and flexibility, which limits its application to a certain extent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 1) Preparation of polyacrylic acid-polytrimethylene carbonate graft copolymer

[0015] Add 18.6 g of polyacrylic acid (molecular weight: 80,000) and 9.8 g of hydroxyl-terminated polytrimethylene carbonate monotridecyl ether (molecular weight: 2,300) into the dry reactor, add 283 ml of dimethyl sulfoxide, and then add 0.061 grams N,N' -Dicyclohexylcarbodiimide, under an inert atmosphere, stirred and reacted at 28°C for 2 days, terminated the reaction, obtained the target product by filtration, dialysis, and drying;

[0016] 2) Preparation of polyacrylic acid film modified by polytrimethylene carbonate and polylactic acid glycolic acid

[0017] Add 10 grams of polyacrylic acid-polytrimethylene carbonate graft copolymer and 37 ml of dimethyl sulfoxide solvent in the drying reactor, and add polylactic acid glycolic acid monododecane accounting for 2% of the total weight of the modified membrane Base ether (molecular weight: 5300), stirred and mixed at 45°C for 50 minutes ...

Embodiment 2

[0020] 1) Preparation of polyacrylic acid-polytrimethylene carbonate graft copolymer

[0021] Add 21 g of polyacrylic acid (molecular weight: 85,000) and 10.6 g of hydroxyl-terminated polytrimethylene carbonate monotridecyl ether (molecular weight: 2,300) into the dry reactor, add 314 ml of dimethyl sulfoxide, and then add 0.039 grams 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 polyacrylic acid film modified by polytrimethylene carbonate and polylactic acid glycolic acid

[0023] Add 10 grams of polyacrylic acid-polytrimethylene carbonate graft copolymer and 36.5 ml of dimethyl sulfoxide solvent in the drying reactor, and add polylactic acid glycolic acid monododecane accounting for 3% of the total weight of the modified membrane Base ether (molecular weight: 5700), stirred and mixed at 48°C for 55 minut...

Embodiment 3

[0026] 1) Preparation of polyacrylic acid-polytrimethylene carbonate graft copolymer

[0027] Add 21.3 grams of polyacrylic acid (molecular weight: 89,000) and 10.8 grams of hydroxyl-terminated polytrimethylene carbonate monotridecyl ether (molecular weight: 2,400) into the dry reactor, add 319 ml of dimethyl sulfoxide, and then add 0.058 g of 3-ethyl-1-(3-dimethylaminopropyl) carbodiimide was stirred and reacted at 32°C for 4 days under an inert atmosphere, the reaction was terminated, and the target product was obtained by filtration, dialysis and drying;

[0028] 2) Preparation of polyacrylic acid film modified by polytrimethylene carbonate and polylactic acid glycolic acid

[0029] Add 9.6 grams of polyacrylic acid-polytrimethylene carbonate graft copolymer and 35 ml of dimethyl sulfoxide solvent in the drying reactor, and add polylactic acid glycolic acid monododecane accounting for 4% of the total weight of the modified membrane Base ether (molecular weight: 6100), stir...

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Abstract

The invention discloses a method for improving water resistance and flexibility of a polyacrylic acid membrane through poly trimethylene carbonate and poly lactic acid-glycolic acid. The method adopts the following steps: 1) synthesizing a polyacrylic acid-poly trimethylene carbonate grafted copolymer: adding hydroxyl-terminated poly trimethylene carbonate monotridecylether, a solvent, a condensing agent and polyacrylic acid into a dry reactor, stirring for a reaction for 2-4 days, terminating the reaction to obtain a target product; 2) preparing the polyacrylic acid membrane modified by poly trimethylene carbonate and poly lactic acid-glycolic acid: adding the polyacrylic acid-poly trimethylene carbonate grafted copolymer, poly lactic acid-glycolic acid mono-laurylether and a solvent into the dry reactor, stirring and mixing for 50-60 minutes, forming a membrane by means of film casting, and drying to obtain the target product. The preparation process is simple and is easy to master, and the water resistance and the flexibility of the prepared modified membrane are greatly improved.

Description

technical field [0001] The invention relates to a method for improving the water resistance and flexibility of polyacrylic acid films, and belongs to the technical field of polymer film preparation. Background technique [0002] Polyacrylic acid is a biomaterial with good biocompatibility and biodegradability. Polyacrylic acid film can be used as artificial skin, etc., but polyacrylic acid film is too hydrophilic and stiff, and lacks good water resistance. and flexibility, which limits its application to a certain extent. Polytrimethylene carbonate and poly(D,L) lactic acid glycolic acid (90 / 10 molar ratio of lactic acid to glycolic acid) are biomaterials with excellent biocompatibility and biodegradability, and good hydrophobicity and flexibility. Firstly, the polytrimethylene carbonate segment is introduced into the polyacrylic acid segment to form a polyacrylic acid-polytrimethylene carbonate graft copolymer, and then the polylactic acid glycolic acid segment is added t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L87/00C08L67/04C08J5/18C08G81/02
CPCC08L87/005C08G81/027C08J5/18C08J2387/00C08J2467/04C08L2203/16C08L67/04
Inventor 申红望朱国全
Owner SHANDONG UNIV OF TECH