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Preparation method of regenerative amylocellulose membrane

A technology of starch cellulose and cellulose, which is applied in the field of preparation of regenerated starch cellulose membranes, can solve the problems of expensive ionic liquids and toxic ionic liquids, and achieve the effects of strong water absorption, simple procedures, and reduced production costs

Active Publication Date: 2018-03-06
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Several new cellulose solvent systems that have been studied more at present include methyl morpholine oxide, sodium oxychloride swelling agent, ionic liquid system, etc. Among them, ionic liquid has a better dissolution effect, can be recycled, and has less environmental pollution. Cellulose dissolving technology will tend to be green and pollution-free, but ionic liquids are expensive, and some ionic liquids are toxic, so they are only suitable for small-scale production in laboratories

Method used

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  • Preparation method of regenerative amylocellulose membrane
  • Preparation method of regenerative amylocellulose membrane
  • Preparation method of regenerative amylocellulose membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of preparation method of regenerated starch cellulose film, comprises the following steps:

[0032] 1) Dissolution of starch cellulose: Weigh waxy cornstarch content is respectively 1g, cellulose content is respectively 4g, after both fully mix, put into the zinc chloride solution that mass fraction is 60%, at 55 ℃ Stir in a water bath at constant temperature for 1 h to obtain a transparent mixed solution.

[0033] 2) Preparation of regenerated starch cellulose mixed film: Weigh 30 g of the mixed solution in step 1) in a 120 mm petri dish, spread it flat, put it into 50%, 70%, and 90% ethanol solution successively for solidification and regeneration for 1 h, Then put it into ethanol solution to coagulate and regenerate for 21 hours, take it out to obtain a wet film, and dry it for several hours to obtain a regenerated starch-cellulose mixed film.

Embodiment 2

[0035] A kind of preparation method of regenerated starch cellulose film, comprises the following steps:

[0036] 1) Dissolution of starch cellulose: weigh 1.5 g of waxy cornstarch and 3.5 g of cellulose respectively, mix the two fully and put them into a magnesium chloride solution with a mass fraction of 65%, and place them in a water bath at 65°C Stir at constant temperature for 1.5h to obtain a transparent mixed solution.

[0037] 2) Preparation of regenerated starch cellulose mixed film: Weigh 30 g of the mixed solution in step 1) in a 120 mm petri dish, spread it flat, and put it into 30%, 50%, and 70% ethanol solution successively to solidify and regenerate 1 hour each, then put into ethanol solution to coagulate and regenerate for 21 hours, take it out to obtain a wet film, dry for several hours, and obtain a regenerated starch-cellulose mixed film.

Embodiment 3

[0039] A kind of preparation method of regenerated starch cellulose film, comprises the following steps:

[0040] 1) Dissolution of starch cellulose: Weigh the content of waxy cornstarch to be 2.0g and the content of cellulose to be 3g respectively. After the two are fully mixed, put them into a magnesium chloride solution with a mass fraction of 62%, and place them in a water bath at 60°C. Stirred at constant temperature for 2h, a transparent mixed solution was obtained.

[0041] 2) Preparation of regenerated starch cellulose mixed film: Weigh 30 g of the mixed solution in step 1) in a 120 mm petri dish, spread it flat, and put it into 40%, 60%, 80%, and 100% ethanol solution in turn Coagulate and regenerate for 1 hour each, then put into ethanol solution to coagulate and regenerate for 20 hours, take it out to obtain a wet film, and after drying for several hours, obtain a regenerated starch-cellulose mixed film.

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Abstract

The invention discloses a preparation method of a regenerative amylocellulose membrane. The preparation method comprises the following steps: (1) dissolving amylocellulose, namely weighing starch andcellulose, wherein the mass content of cellulose is 60-100% of total amount of starch and cellulose; fully mixing and then putting in 60%-65% of inorganic chlorate solution, and stirring for 1-5h in awater bath at constant temperature of 55-75 DEG C, to obtain a transparent mixed solution; and (2) preparing the regenerative amylocellulose membrane, namely putting the mixed solution prepared in the step (1) into a culture dish, putting ethanol solution for solidification and regeneration, to obtain a wet regenerative amylocellulose membrane, drying for 1-3h, to obtain the finished regenerativeamylocellulose membrane product. The regenerative amylocellulose composite membrane is prepared by selecting an environment-friendly and low-price chlorate solution as a solvent, dissolving native starch cellulose, and solidifying and regenerating in the ethanol aqueous solution, so that the regenerative amylocellulose compound membrane with a close stereoscopic network structure can be prepared;and according to the preparation method, not only are procedures simple and fast, but also the production cost is low.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a preparation method of a regenerated starch cellulose film. Background technique [0002] Starch and cellulose are abundant in nature, renewable and biodegradable, and environmentally friendly. Today, when the fossil resource crisis and environmental pollution problems are becoming more and more serious, their development and utilization value is particularly prominent. The composite material prepared with starch and cellulose as the substrate The materials have been widely used in membrane separation, flexible displays, solar cells, electronic paper, plastics, food packaging, plastics and many other fields. The preparation method of starch cellulose mixed material is generally tape casting method or hot pressing molding method. Since starch cellulose is a natural polymer material, it contains a large number of hydroxyl groups, and there are a large number of hydroge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/02C08L3/02C08K3/16C08K5/05C08J5/18
CPCC08J5/18C08J2301/02C08J2403/02C08K3/16C08K5/05C08K2003/168
Inventor 尚小琴江慧华赖雅平刘鹏刘汝锋
Owner GUANGZHOU UNIVERSITY