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Preparation method of cellulose acetate membrane surface crosslinked chitosan hydrophilic membrane

A technology of cellulose acetate membrane and cross-linked chitosan, which is applied in the field of membrane surface modification and polymer materials to achieve good antibacterial effect, excellent mechanical strength and mechanical toughness, and low cost

Active Publication Date: 2012-09-05
NANJING YITE BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no research report on crosslinking modified cellulose acetate membrane with natural polysaccharide chitosan as crosslinking agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Example 1: The cellulose acetate membrane with a pore size of 0.1 μm (purchased in the market) was hydrolyzed in 2% (W / W) hydrochloric acid aqueous solution, the activated cellulose acetate membrane was taken out, washed with deionized water, and blotted dry stand-by. Get chitosan 0.1g and dissolve in the acetic acid aqueous solution of 50% (volume ratio concentration), make the acetic acid solution of 1% chitosan (mass ratio concentration). Two pieces of activated cellulose acetate membranes were placed in 1% chitosan aqueous acetic acid solution. The reaction was shaken for 2 hours at 30°C. Take out the film, dry the solution on the surface of the film, then wash it with deionized water, dry the film in an oven at 80°C for 30 minutes, and store it in a dry place at room temperature to obtain a cellulose acetate film cross-linked chitosan modified hydrophilic film .

[0011] The adsorption performance test of the cellulose acetate membrane modified by chitosan cross...

Embodiment 2

[0012] Example 2: The cellulose acetate membrane with a pore size of 1.5 μm (purchased in the market) was hydrolyzed in 90% (W / W) oxalic acid aqueous solution, the activated cellulose acetate membrane was taken out, washed with deionized water, and blotted dry stand-by. Get chitosan 0.15g and dissolve in 40% (volume specific concentration) acetic acid solution to make 1.5% chitosan (mass specific concentration) acetic acid aqueous solution. One piece of activated cellulose acetate membrane was placed in 1.5% chitosan aqueous acetic acid solution, and the reaction was shaken for 2 hours at 30°C. Take out the film, dry the solution on the surface of the film, then wash it with deionized water, dry the film in an oven at 80°C for 30 minutes, and store it in a dry place at room temperature to obtain a cellulose acetate film cross-linked chitosan modified hydrophilic film .

[0013] The adsorption performance test of the cellulose acetate membrane modified by chitosan cross-linki...

Embodiment 3

[0014] Example 3: The cellulose acetate membrane (purchased in the market) with a pore size of 3 μm was hydrolyzed in 50% (W / W) benzoic acid aqueous solution, and the activated cellulose acetate membrane was taken out and washed with deionized water, and sucked Dry and set aside. Get chitosan 0.2g and dissolve in 30% (volume ratio concentration) acetic acid solution, make 4% chitosan (mass ratio concentration) acetic acid aqueous solution. One piece of activated cellulose acetate membrane was placed in 4% chitosan aqueous acetic acid solution, and the reaction was shaken for 2 hours at 30°C. Take out the film, dry the solution on the surface of the film, then wash it with deionized water, dry the film in an oven at 80°C for 30 minutes, and store it in a dry place at room temperature to obtain a cellulose acetate film cross-linked chitosan modified hydrophilic film .

[0015] The adsorption performance test of the cellulose acetate membrane modified by chitosan cross-linking ...

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PUM

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Abstract

The invention provides a preparation method of a cellulose acetate membrane surface crosslinked chitosan hydrophilic membrane and belongs to the technical field of membrane surface modification. A cellulose acetate membrane is activated by an acid solution, and has coupling crosslinking with the acetic acid water solution of the chitosan, so that a hydrophilic membrane material of the cellulose acetate membrane surface crosslinked chitosan can be prepared. The preparation method of the invention is simple in technology, low in cost, natural, and environmentally-friendly. The cellulose acetate membrane modified by the method is good in hydrophillic nature and binding capability, is good in mechanical strength and mechanical toughness, can be widely applicable to the field of biochemistry, molecular biology and environment, such as the immunoassay, the protein and DNA (deoxyribonucleic acid) analysis, the colloidal gold detection card, the absorption and removal of the toxic and harmful substances in the environment such as the environmental hormone and the like, and can be taken as biomedical material due to the improvement of the mold resistance of a cellulose acetate membrane.

Description

[0001] technical field [0002] The invention belongs to the technical field of polymer materials and the technical field of membrane surface modification. The invention relates to a preparation method of a non-toxic cellulose acetate membrane surface cross-linked chitosan hydrophilic membrane with simple process. Background technique [0003] Cellulose acetate membrane is made of pure acetate cellulose, which has the advantages of high selectivity, good chlorine resistance, and simple membrane making process. Currently, such membranes are ideal for biological and clinical analysis, sterility testing, and scintillation measurements. However, due to the poor chemical, thermal stability and compactness of the cellulose acetate film, the film quality is brittle, and the mechanical properties are poor, which seriously limits its application range and performance. In recent years, the development of modified cellulose acetate membranes for different purposes has been carried ou...

Claims

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Application Information

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IPC IPC(8): C08J7/14C08J5/18C08J3/24C08L1/12C08L5/08
Inventor 杜道林孙见凡薛永来
Owner NANJING YITE BIOTECH
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