Modified regenerated cellulose membrane and preparation method and application thereof

A regenerated cellulose film and regenerated cellulose technology, applied in the field of modified regenerated cellulose film and preparation, can solve the problems of no polyacrylamide, lack of registration, limitations, etc., and achieve controllable thickness and good biocompatibility , The effect of the simple and easy preparation method

Inactive Publication Date: 2015-12-09
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in general, the grafting of polyacrylamide to cellulose and cellulose derivatives is mostly limited to the mechanism research, and the report on its application is still lacking, and there is no direct grafting of polyacrylamide to regenerated cellulose at present. The research on the grafting of membranes, and the formation of IPN structures by the self-polymerization of acrylamide in cellulose membranes have not yet been reported by researchers.

Method used

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  • Modified regenerated cellulose membrane and preparation method and application thereof
  • Modified regenerated cellulose membrane and preparation method and application thereof
  • Modified regenerated cellulose membrane and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Dissolve short cotton cellulose in 7% NaOH / 12% urea aqueous solution to prepare a 4.6% cellulose solution. After defoaming, it is cast on a glass plate to form a 0.6mm solution layer, pre-solidified in the air for 30 minutes, and then immersed in the In the ethanol solution for 15 minutes, and then thoroughly washed with water, the regenerated cellulose gel membrane was obtained for use. A part of the cellulose gel film is immersed in a solution of acrylamide, the mass fraction of acrylamide is 7%, and the solvent is a mixed solution of alcohol and water. After soaking for 12 hours, blow nitrogen, add cerium ammonium nitrate initiator, react for 2 hours, add resorcinol terminator, react for 1 hour, after the reaction, wash with deionized water and acetone respectively to obtain polyacrylamide grafted cellulose modified film, and then dried for later use. Another part of the pure cellulose membrane is immersed in a solution of acrylamide, the mass fraction of acrylamide...

Embodiment 2

[0028] Use the ionic liquid 1-allyl-3-methylimidazole chloride as a solvent to dissolve cotton linter cellulose, the mass concentration of cellulose is 3%, cast on a glass plate to form a 1.5mm solution layer, and then immerse and solidify smoothly 15 minutes in bath water, and thoroughly washed with water to obtain a regenerated cellulose gel film for use. A part of the cellulose gel film is immersed in a solution of acrylamide, the mass fraction of acrylamide is 6%, and the solvent is a mixed solution of alcohol and water. After soaking for 10 hours, pass nitrogen gas, add cerium ammonium nitrate initiator, react for 1.5 hours, add resorcinol terminator, react for 40 minutes, after the reaction, wash with deionized water and acetone respectively to obtain polyacrylamide grafted cellulose The modified membrane was then dried for later use. Another part of the pure cellulose membrane was immersed in a solution of acrylamide, the mass fraction of acrylamide was 8%, and the sol...

Embodiment 3

[0030] The regenerated cellulose gel film was prepared with the method in Example 1. A part of the cellulose gel film is immersed in a solution of acrylamide, the mass fraction of acrylamide is 3%, and the solvent is a mixed solution of alcohol and water. After soaking for 15 hours, pass nitrogen gas, add cerium ammonium nitrate initiator, react for 2 hours, add resorcinol terminator, react for 1 hour, after the reaction, wash with deionized water and acetone respectively to obtain polyacrylamide grafted cellulose modification film, and then dried for later use. Another part of the pure cellulose membrane was immersed in a solution of acrylamide, the mass fraction of acrylamide was 12%, and the solvent was water. After soaking for 15 hours, pass nitrogen gas, add ammonium persulfate initiator, react for 1 hour, end the reaction, wash with deionized water and acetone respectively to obtain an IPN film of polyacrylamide and cellulose, and then dry it for later use. Thermogravi...

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Abstract

The invention provides a modified regenerated cellulose membrane and a preparation method and application thereof and relates to a regenerated cellulose membrane. The modified regenerated cellulose membrane is prepared from 80%-99.9% of cellulose and 0.1%-20% of polyacrylamide. The preparation method comprises the steps that 1, the cellulose is dissolved to obtain a cellulose solution, a solution layer is formed on a substrate through tape casting after defoaming, washing is performed after solidification, and the regenerated cellulose membrane is obtained; 2, the regenerated cellulose membrane is soaked in an acrylamide solution, an initiator is added to initiate polymerization so as to form a polyacrylamide and cellulose membrane grafted membrane; 3, another part of regenerated cellulose membrane obtained in the step 1 is soaked in the acrylamide solution, the initiator is added to initiate polymerization so as to form a polyacrylamide and regenerated cellulose gel membrane interpenetrated network structure membrane; 4, the membrane prepared in the step 2 and the membrane prepared in the step 3 are washed and dried to obtain the modified regenerated cellulose membrane. The modified regenerated cellulose membrane can serve as a water-absorbing drying membrane and is applied to the fields of cosmetic package, food package, industrial wastewater treatment and the like.

Description

technical field [0001] The invention relates to a regenerated cellulose film, in particular to a modified regenerated cellulose film, a preparation method and an application thereof. Background technique [0002] Over the years, due to its superior performance, superabsorbent materials have been used in various fields such as hygiene, cosmetics production, and wastewater treatment, and have become very valuable and important materials. However, there are still shortcomings such as water absorption rate and low strength, and in Broadening synthesis channels, improving environmental protection performance, and developing application fields are still to be developed. Cellulose is the most abundant and ancient natural polymer on the earth. Due to its unique structure and some special properties, it has gradually become the object of research. Cellulose has a wide range of sources, and has the potential to reduce costs, recycle waste, and become an environmentally friendly mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/02C08F220/54C08J5/18B01D71/78
Inventor 熊晓鹏张潇朱诗沁
Owner XIAMEN UNIV
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