1, 3-beta-D-glucan physical gel, and preparation method and application thereof

A physical gel, glucan technology, used in the production of bulk chemicals, etc., to achieve the effect of good frost resistance, good electrical conductivity and high transparency

Pending Publication Date: 2022-01-21
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] After searching the existing technical literature, it is found that there is no public report on the preparation of 1,3-β-D-glucan physical gel technology by freeze-thaw method and solute replacement method

Method used

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  • 1, 3-beta-D-glucan physical gel, and preparation method and application thereof
  • 1, 3-beta-D-glucan physical gel, and preparation method and application thereof

Examples

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preparation example Construction

[0065] The first object of the present invention is to provide two kinds of preparation methods of 1,3-β-D-glucan organogel, comprising the following steps:

[0066](1) Preparation of 1,3-β-D-glucan solution: Add 1,3-β-D-glucan powder into the first solvent, stir at a certain temperature for a period of time to obtain a transparent polysaccharide solution;

[0067] (2) Preparation of freeze-thaw organogel: freeze the solution obtained in step (1) below the freezing point, take it out and thaw it above the freezing point, and repeat the above-mentioned freeze-thaw process to obtain the freeze-thaw organogel; is the first organogel;

[0068] (3) Preparation of organogel by solvent replacement method: all or part of the first solvent in the freeze-thaw gel obtained in step (2) is replaced by the second solvent to obtain the second organogel.

[0069] In the method provided by the present invention, the organogel can be formed by freezing and thawing, and can also be formed by s...

Embodiment 1

[0113]The present embodiment provides a preparation method of curdlan organogel, comprising the following steps:

[0114] (1) Accurately weigh 2.5g of curdlan powder, slowly add it into 50g of DMSO solution while stirring, stir at 90°C for 4 hours, and rotate at 500rpm. Under this condition, the curdlan is fully dissolved, and sealed after cooling spare.

[0115] (2) Slowly pour the solution obtained in step (1) into a polytetrafluoroethylene mold, seal it, vacuum degass it for 6 hours, and store it sealed for 7 days. Place it in a low-temperature refrigerator and freeze it at -20°C for 24 hours. After taking it out, Thaw at room temperature for 4 hours, and take out the organogel from the mold after one freeze-thaw treatment. The organogel was tested for compressive properties, and when the compressive strain was 60%, its compressive strength was 37.6kPa.

Embodiment 2

[0117] The present embodiment provides a preparation method of curdlan organogel, comprising the following steps:

[0118] (1) Accurately weigh 2.5g of curdlan gum powder, slowly add in 50g of DMSO solution while stirring, stir at room temperature for 12 hours, rotating speed 500rpm, seal for later use.

[0119] (2) Slowly pour the solution obtained in step (1) into a polytetrafluoroethylene mold and seal it. After vacuum degassing for 6 hours, seal it and store it for 7 days. Place it in a low-temperature refrigerator and freeze it at -20°C for 24 hours. Take it out Then place it at room temperature to thaw for 4 hours, and take out the organogel from the mold after one freeze-thaw treatment. The photo of the gel in the optical camera see figure 1 , the resulting organogel was tested for compressive properties, and when the compressive strain was 60%, its compressive strength was 70.5kPa.

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Abstract

The invention relates to 1, 3-beta-D-glucan physical gel, and a preparation method and application thereof. Firstly, a physical gel is prepared in a first solvent of a non-aqueous solvent through a freeze thawing method, and then a series of other types of physical gel are obtained by adopting a solvent replacement method. If an organic solvent is used for preparing a freeze-thawed organogel, the organic solvent in the gel is replaced by a second solvent or water, and new organogel and hydrogel can be obtained respectively; if an ionic liquid is used for preparing freeze-thawed ionic liquid gel, the ionic liquid in the gel is replaced by the second solvent or water, and new organic gel and hydrogel can be obtained respectively; the gel is dried to obtain the aerogel; carbon aerogel can be obtained after the aerogel is carbonized; and the hydrogel or aerogel is subjected to hot pressing treatment to prepare the bioplastic. The physical gel series material can be conveniently produced on a large scale at low cost, and has positive application prospects in the fields of food, medicine, cosmetics, medical beauty, energy, environment and the like.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to 1,3-beta-D-glucan physical gel and its preparation method and application. Background technique [0002] Polymer gel is a three-dimensional network structure composed of polymer chains, which can absorb and maintain solvents tens to hundreds of times its own weight, and is a functional soft material with a wide range of uses. Many polysaccharides have the ability to form gels, such as agar, konjac gum, gellan gum, curdlan gum, etc. Studies have shown that the gel formed by polysaccharides has good biocompatibility, degradability and environmental friendliness, and can also maintain the activity of biomolecules immobilized in the gel for a long time. Therefore, polysaccharide gels have application prospects in drug controlled release, tissue engineering, medical cosmetology, and artificial intelligence materials. Polysaccharide aerogels can be obtained by removing the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/09C08J3/07C08L5/02
CPCC08J3/09C08J3/07C08J2305/02Y02P20/54
Inventor 张洪斌吴敏
Owner SHANGHAI JIAO TONG UNIV
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