Konjaku plucosidopolyose graft copolymer, preparing process and use thereof

A technology of konjac glucosidan and graft copolymer, which is applied in the field of konjac glucosidan graft copolymer and its preparation and application, can solve the problems of limited application, improve the emergence rate, and promote the formation of aggregate structure , the effect of shortening the emergence cycle

Inactive Publication Date: 2003-03-12
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most hydrogels to date are non-biodegradable, which limits

Method used

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  • Konjaku plucosidopolyose graft copolymer, preparing process and use thereof
  • Konjaku plucosidopolyose graft copolymer, preparing process and use thereof
  • Konjaku plucosidopolyose graft copolymer, preparing process and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment one: the synthesis of konjac glucomannan / acrylic acid graft copolymer

[0038] Accurately weigh 0.10 g of konjac fine powder, prepare an aqueous solution with a concentration of 0.5%, and place it at about 50°C for a sufficient time to make the KGM disperse evenly, then add 1.77 mol / liter of acrylic acid monomer, stir well and then add 2.19 mmol / liter of initiator solution (cerium ammonium nitrate + nitric acid) and 10.37 mmol / liter of cross-linking agent N, N'-methylenebisacrylamide, stir well and stop the reaction after reacting at 45-50 ° C for 2 hours , to obtain a colorless and transparent hydrogel.

[0039] The hydrogel obtained by the reaction was soaked with distilled water, washed, and then dried at 60° C. to obtain a crude product. Then the dried product was extracted with acetone in a Soxhlet extractor for 24 hours to remove the homopolymer, and dried at 60°C to obtain the desired pure graft copolymer, which was stored for future use. Determi...

Embodiment 2

[0052] Embodiment two: the synthesis of konjac glucomannan / methacrylic acid graft copolymer

[0053] Accurately weigh 0.20 g of konjac fine powder, prepare an aqueous solution with a concentration of 1.0%, and place it at about 50°C for sufficient time to make the KGM disperse evenly, then add 1.77 mol / liter of methacrylic acid monomer, stir well and then add 2.19 Initiator solution (cerium ammonium nitrate + nitric acid) and N, N'-methylenebisacrylamide with 10.37 mmol / L crosslinking agent, stir well and react at 45-50°C for 2 hours Stop the reaction to obtain a colorless and transparent hydrogel.

[0054] The hydrogel obtained by the reaction was soaked with distilled water, washed, and then dried at 60° C. to obtain a crude product. Then the dry product was extracted with acetone in a Soxhlet extractor for 24 hours to remove the homopolymer, and dried at 60°C to obtain a pure graft copolymer.

Embodiment 3

[0055] Embodiment three: the synthesis of konjac glucomannan / acrylamide graft copolymer

[0056] In a three-necked flask with a stirrer, add 0.20 g of konjac fine powder and water, stir to make a 0.5% aqueous solution and keep warm at 50 ° C to make the konjac fine powder evenly dispersed, and nitrogen is introduced, and 0.12 g of cerium ammonium nitrate is added (dissolved in nitric acid), after stirring for 20 minutes, add 10 grams of acrylamide and 0.17 grams of N, N'-methylenebisacrylamide, and stop the reaction after 2.5 hours to obtain a gel.

[0057] The hydrogel obtained by the reaction was soaked with distilled water, washed, and then dried at 60° C. to obtain a crude product. Then the dry product was extracted with acetone in a Soxhlet extractor for 24 hours to remove the homopolymer, and dried at 60°C to obtain a pure graft copolymer.

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Abstract

A konjak glucoside polyose graft copolymer is prepared from the aqueous solution of konjak glucoside polyose and the vinyl monomer through graft copolymerization under the action of redox initiator. Its advantages are high biocompatibility and biodegradability, wide application range, simple preparing process and no environmental pollution.

Description

technical field [0001] The invention relates to konjac glucosidan graft copolymer and its preparation method and application. Background technique [0002] Konjac belongs to Araceae plants, and its tubers are rich in reserve polysaccharide Konjac glucomannan (Konjac glucomannan, abbreviated as KGM). Konjac glucomannan is the main component of konjac fine powder, accounting for about 50%-60% of the dry product weight. [0003] As early as the 1960s to 1980s, Japanese scholars did a lot of research on the structure and properties of konjac glucomannan, and the results showed that konjac glucomannan is a main chain composed of D-mannose and D-glucose with β-1, 4 Heteropolysaccharides linked by pyranoside bonds, there is a branched chain structure connected by β-1, 3 bonds on the C3 position of the main chain mannose, and there are about 3 branched chains for every 32 sugar residues. The chain is only a few residues long, and there may be acetyl groups on some sugar residues, ...

Claims

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Application Information

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IPC IPC(8): C08F251/00
Inventor 刘芝兰陈立贵卓仁禧
Owner WUHAN UNIV
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