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Preparation method of graphene oxide/konjac glucomannan degradable composite film material

A konjac glucomannan and composite film technology, which is applied in the field of preparation of graphene oxide/konjac glucomannan degradable composite film materials, can solve the problems of poor mechanical properties and thermal stability, and achieve good hydrophilicity and Excellent mechanical properties, good material regularity, and high thermal stability

Inactive Publication Date: 2013-05-08
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of konjac glucomannan membrane mechanical properties and poor thermal stability in the prior art, and to provide a preparation method of graphene oxide / konjac glucomannan degradable composite film material

Method used

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  • Preparation method of graphene oxide/konjac glucomannan degradable composite film material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add a certain amount of graphene oxide into 200mL deionized water, stir ultrasonically for 1 hour, and prepare a graphene oxide solution with a concentration of 5mg / mL; add 2g konjac glucomannan to the above solution while stirring, and stir at 30°C for 0.5 After 1 hour, the film solution was prepared and left to stand for 12 hours; the film solution was poured into the film-making mold, the film solution and the mold were placed in a drying oven, and vacuum-dried at 30°C for 24 hours, taken out, cooled to room temperature, and peeled off the film . Place the membrane in 10% ammonia solution, treat it at 30°C for 2 hours, take it out, and dry it at 50°C.

[0019] The test results are: tensile strength: 183 MPa, elongation at break: 45.5%.

Embodiment 2

[0021] Add a certain amount of graphene oxide into 200mL of deionized water, stir ultrasonically for 1 hour, and prepare a graphene oxide solution with a concentration of 3mg / mL; add 2g of konjac glucomannan to the above solution while stirring, and stir at 40°C for 1.5 After 1 hour, the film solution was prepared and left to stand for 12 hours; the film solution was poured into the film-making mold, the film solution and the mold were placed in a drying oven, and vacuum-dried at 40°C for 24 hours, taken out, cooled to room temperature, and peeled off the film ; Place the film in 5% glutaraldehyde aqueous solution, treat it at 40°C for 2 hours, take it out, and dry it at 40°C.

[0022] The test results are: tensile strength: 175MPa, elongation at break: 50.3%.

Embodiment 3

[0024] Add a certain amount of graphene oxide into 200mL of deionized water, stir ultrasonically for 3 hours, and prepare a graphene oxide solution with a concentration of 1mg / mL; add 2g of konjac glucomannan to the above solution while stirring, and stir at 40°C for 2.5 After 24 hours, the film solution was prepared and left to stand for 24 hours; the film solution was poured into the film-making mold, the film solution and the mold were placed in a drying oven, and vacuum-dried at 40°C for 24 hours, taken out, cooled to room temperature, and peeled off the film ; Place the film in 1% aqueous sodium hydroxide solution, treat it at 45°C for 3 hours, take it out, and dry it at 50°C.

[0025] The test results are: tensile strength: 164 MPa, elongation at break: 68.2%.

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Abstract

The invention discloses a preparation method of a graphene oxide / konjac glucomannan degradable composite film material. The preparation method is characterized by comprising the steps of: preparing graphene oxide aqueous solution with mass percent concentration of 0.01-1%; adding konjac glucomannan in the graphene oxide aqueous solution under stirring according to a proportion that the mass ratio of graphene oxide to konjac glucomannan is 1: 1-200, stirring for 0.5-3 hours at 30-60DEG C, and standing to obtain a film solution; pouring the film solution in a die for manufacturing a film, drying in a drying oven, cooling, and uncovering the film to obtain the composite film; and placing the composite film in glutaraldehyde aqueous solution, reacting for 1-5 hours at 5-60DEG C, taking out, and drying to obtain the graphene oxide / konjac glucomannan degradable composite film material. The material prepared by the method has the advantages of good mechanical property, high heat stability, good degradability and biocompatibility and the like, and can be used as a tissue engineering support material or a package material.

Description

technical field [0001] Preparation method of graphene oxide / konjac glucomannan degradable composite film material Background technique [0002] Konjac glucomannan is a natural polymer polysaccharide, its molecule contains glucose and mannose, connected by β-1,4-glycosidic bonds, and there are also acetyl groups as a renewable natural resource, konjac glucomannan Sufficient sources of polysaccharides, biodegradable, hydrophilic, gelling, film-forming, antibacterial, low calorific value and other characteristics and some special physiological functions, as well as chemically modifiable functional groups, can be widely used in Food, medicine, chemical and biological fields. Because konjac glucomannan has good biodegradability, biocompatibility and certain biological activity, it can inhibit hyperglycemia, hyperlipidemia, diabetes, obesity, and inhibit colorectal cancer and other diseases, so konjac glucomannan is still high-quality food additives. The gel formed after drying...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08J7/12C08L5/00C08K9/04C08K3/04
Inventor 竹文坤段涛雷佳吴凡秦韬
Owner SOUTHWEAT UNIV OF SCI & TECH
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