Preparation method based on amphoteric cellulose composite material

A technology of amphoteric cellulose and composite materials, applied in the direction of chemical instruments and methods, other chemical processes, etc., to achieve good adsorption performance, reasonable and effective utilization, green environmental protection and high efficiency

Inactive Publication Date: 2014-01-01
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Amphoteric cellulose is a type of modified cellulose that contains both cationic and anionic groups. There is no report on the use of amphoteric cellulose to load graphene oxide and chitosan to make composite materials.

Method used

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  • Preparation method based on amphoteric cellulose composite material
  • Preparation method based on amphoteric cellulose composite material
  • Preparation method based on amphoteric cellulose composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Weigh 10g of cotton fiber, place in 400ml concentration of 2wt% sodium hydroxide solution, boil for 90min, transfer to 300ml concentration of 18wt% sodium hydroxide solution after cooling, let stand at room temperature for 120min, wash with deionized water for 5 Second, dry alkaline cotton fibers.

[0035] Take 5.0g of basic cotton fiber and place it in 300ml of acetone, add 5ml of 30wt% sodium hydroxide solution and 9g of 3-chloro-2-hydroxypropyltrimethylammonium chloride dropwise under stirring, and react in a water bath at 45°C for 3h Finally, adjust the pH value of the product to neutral with dilute hydrochloric acid, filter with suction, wash with methanol and absolute ethanol in sequence, and dry to constant weight to obtain quaternized cotton fiber.

[0036] Add 5.0g of quaternized cotton fiber and 400ml of deionized water into a three-necked flask, protect it with nitrogen, stir at 30°C for 15min, add 10g of cerium ammonium nitrate, react for 25min, and then add...

Embodiment 2

[0040] Weigh 10g of microcrystalline cellulose, place in 250ml of 0.5wt% sodium hydroxide solution, boil for 60min, transfer to 200ml of 10wt% sodium hydroxide solution after cooling, let it stand at room temperature for 120min, deionize Washed with water for 6 times and dried to obtain alkaline microcrystalline cellulose.

[0041] Take 8.0g of alkaline microcrystalline cellulose and place it in 200ml of acetone, add 8ml of 10wt% sodium hydroxide solution and 16g of 3-chloro-2-hydroxypropyltrimethylammonium chloride dropwise under stirring, and place in a water bath at 45°C After reacting for 3 hours, adjust the pH value of the product to neutral with dilute hydrochloric acid, filter with suction, wash with methanol and absolute ethanol in sequence, and dry to constant weight to obtain quaternized microcrystalline cellulose.

[0042] Add 5.0g of quaternized microcrystalline cellulose and 200ml of deionized water into a three-necked flask, protect it with nitrogen, stir at 25°C...

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Abstract

The invention discloses a preparation method based on an amphoteric cellulose composite material. Cellulose is used as a raw material to obtain amphoteric quaternary ammonium-sulfated cellulose, then the amphoteric quaternary ammonium-sulfated cellulose is used as a carrier of oxidized grapheme and chitosan, the amphoteric quaternary ammonium-sulfated cellulose, the oxidized grapheme and the chitosan can be powerfully combined under the actions of the covalent bond, the electrostatic attraction, the hydrogen bond and the like, and then is subjected to freeze-drying to obtain the amphoteric quaternary ammonium-sulfated cellulose, the oxidized grapheme and the chitosan ternary composited material. The composite material has the renewability, the degradability, green and environment-friendly effect and high-efficiency adsorbability, the condition is mild and easy to realize in the preparation process, and the cellulose can be reasonably and effectively utilized, therefore, the preparation method has good economic and social benefits.

Description

technical field [0001] The invention relates to a method for preparing a composite material based on amphoteric cellulose, in particular to a method for preparing a composite material based on quaternary ammonium-sulfonated cellulose, and belongs to the field of functional materials. Background technique [0002] Graphene oxide is a single-layer carbon atom two-dimensional nanomaterial obtained by chemical oxidation and exfoliation of natural graphite. Its aspect ratio is as high as 1000, with large specific surface area and high mechanical strength. A large number of oxygen-containing groups are randomly distributed on the surface and edges. (middle of the sheet: -OH, C-O-C, edge: -C=O, -COOH), amphiphilic, showing a distribution of properties from hydrophilic to hydrophobic from the edge to the center of the sheet, showing good wetting properties and surface activity , and exhibit excellent dispersion in water, these characteristics are the reasons why it is widely used in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30
Inventor 陈宇岳熊佳庆林红苏公磊
Owner SUZHOU UNIV
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