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Method for preparing cellulose membrane based on chitosan

A cellulose film, chitosan technology, applied in the fields of botanical equipment and methods, chemicals for biological control, chemical instruments and methods, etc., can solve the problems of inconvenient use, easy breeding of bacteria on the surface, poor antibacterial performance, etc. , to achieve the effect of excellent antibacterial performance, excellent antibacterial and bactericidal effect, and high practicability

Pending Publication Date: 2020-05-12
陈昭桦
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the fields of biomedicine, chemical industry and sewage treatment, we often use cellulose membranes, but the existing cellulose membranes have poor antibacterial performance, and bacteria are easy to breed on the surface, which will bring us inconvenience when using

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] S1: Prepare materials:

[0049] Weigh tetrabutyl titanate, absolute ethanol, thiourea, glacial acetic acid, sodium periodate solution, bamboo dissolving pulp, concentrated sulfuric acid, potassium permanganate solution and glycerol solution, and set aside;

[0050] Take by weighing ionic liquid, chitosan, catalyst and vinyltriethoxysilane, for subsequent use;

[0051] S2: Preparation of modified titanium dioxide:

[0052] Take tetrabutyl titanate, dissolve in absolute ethanol, and stir for 20 minutes to obtain solution A; then weigh thiourea, dissolve in deionized water, and stir for 15 minutes, add glacial acetic acid during stirring to obtain solution B; take solution A and solution B, Stir and mix for 120 minutes. At this time, the mixed solution forms a gel, and then put it in an oven for drying. The drying temperature is 100°C, and the drying time is 24 hours to obtain material C; take material C, put it into a high-temperature furnace after ball milling , calcin...

Embodiment 2

[0059] S1: Prepare materials:

[0060] Weigh tetrabutyl titanate, absolute ethanol, thiourea, glacial acetic acid, sodium periodate solution, bamboo dissolving pulp, concentrated sulfuric acid, potassium permanganate solution and glycerol solution, and set aside;

[0061] Take by weighing ionic liquid, chitosan, catalyst and vinyltriethoxysilane, for subsequent use;

[0062] S2: Preparation of modified titanium dioxide:

[0063] Take tetrabutyl titanate, dissolve in absolute ethanol, and stir for 25 minutes to obtain solution A; then weigh thiourea, dissolve in deionized water, and stir for 20 minutes, add glacial acetic acid during stirring to obtain solution B; take solution A and solution B, Stir and mix for 125 minutes. At this time, the mixed solution forms a gel, and then put it in an oven for drying. The drying temperature is 103°C, and the drying time is 24 hours to obtain material C; take material C, put it into a high-temperature furnace after ball milling , roasti...

Embodiment 3

[0070] S1: Prepare materials:

[0071] Weigh tetrabutyl titanate, absolute ethanol, thiourea, glacial acetic acid, sodium periodate solution, bamboo dissolving pulp, concentrated sulfuric acid, potassium permanganate solution and glycerol solution, and set aside;

[0072] Take by weighing ionic liquid, chitosan, catalyst and vinyltriethoxysilane, for subsequent use;

[0073] S2: Preparation of modified titanium dioxide:

[0074] Take tetrabutyl titanate, dissolve in absolute ethanol, and stir for 28 minutes to obtain solution A; then weigh thiourea, dissolve in deionized water, and stir for 18 minutes, add glacial acetic acid during stirring to obtain solution B; take solution A and solution B, Stir and mix for 124min. At this time, the mixed solution forms a gel, and then put it in an oven for drying. The drying temperature is 103°C, and the drying time is 24h to obtain material C; take material C, put it into a high-temperature furnace after ball milling , roasting at 558°...

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PUM

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Abstract

The invention discloses a method for preparing a cellulose membrane based on chitosan. The cellulose membrane prepared from the components such as modified titanium dioxide, pretreated cellulose and chitosan not only has excellent antibacterial and bactericidal effects, but also greatly improves the photocatalytic activity of the cellulose membrane, responds to visible light, and can effectively degrade organic matters; thiourea is used as a nitrogen-sulfur doping source, nitrogen-sulfur doped modified titanium dioxide is prepared through a sol-gel method, and nitrogen-sulfur doping can properly inhibit grain growth of titanium dioxide, so that the specific surface area of the titanium dioxide is increased, the titanium dioxide responds to visible light, and the photocatalytic activity ofthe titanium dioxide is improved; the preparation method is reasonable in process design and simple to operate, the cellulose membrane is prepared from chitosan, cellulose and other components; and meanwhile, the cellulose membrane has excellent antibacterial performance and photocatalytic performance, can be widely applied to the fields of sewage treatment, biomedical treatment and the like, andhas relatively high practicability.

Description

technical field [0001] The invention relates to the technical field of cellulose membranes, in particular to a method for preparing cellulose membranes based on chitosan. Background technique [0002] Cellulose is a macromolecular polysaccharide composed of glucose. Insoluble in water and general organic solvents. It is the main component of plant cell wall. Cellulose is the most widely distributed and most abundant polysaccharide in nature, accounting for more than 50% of the carbon content in the plant kingdom. The cellulose content of cotton is close to 100%, making it the purest natural source of cellulose. In general wood, cellulose accounts for 40-50%, and there are 10-30% hemicellulose and 20-30% lignin. [0003] In the fields of biomedicine, chemical industry and sewage treatment, we often use cellulose membranes, but the existing cellulose membranes have poor antibacterial properties and are prone to bacteria breeding on the surface, which will bring us inconven...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L5/08C08L1/04C08K9/04C08K3/22B01J31/06B01J31/38A01N59/16A01N43/16A01N25/10A01P1/00A01P3/00
CPCC08J5/18B01J31/06B01J31/38A01N59/16A01N43/16A01N25/10C08J2305/08C08J2401/04C08K9/04C08K2003/2241B01J35/39
Inventor 陈昭桦
Owner 陈昭桦
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