Amphoteric cellulose material and application thereof

A technology of amphoteric cellulose and cellulose, applied in other chemical processes, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of reducing active sites, affecting reactivity, limited adsorption capacity, etc., to achieve Good hydrophilicity, porous microstructure and strong reactivity

Inactive Publication Date: 2014-01-08
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when natural cellulose is directly used as an adsorbent, its adsorption capacity is limited and its selectivity is low. This is because there are a large number of hydroxyl groups in its structure, resulting in the formation of hydrogen bonds within and between its molecular chains. This hydrogen bond widely covers The structure of the structure reduces its active site, thereby affecting the reactivity

Method used

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  • Amphoteric cellulose material and application thereof
  • Amphoteric cellulose material and application thereof
  • Amphoteric cellulose material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Weigh 10g of cotton fiber, put it in 400ml of 2% sodium hydroxide solution, boil it for 90min, take it out after cooling, squeeze it dry and put it in 300ml of 18% sodium hydroxide solution, let it stand at room temperature After 120 minutes, take it out, wash it with deionized water, and dry it to obtain alkaline cotton fiber.

[0033] Take 5.0g of basic cotton fiber, place it in a three-necked flask filled with 300ml of acetone, slowly add 5ml of sodium hydroxide solution with a mass concentration of 30% under electric stirring, and then add 9g of 3-chloro-2-hydroxypropyl tris Methylammonium chloride was reacted in a water bath at 45°C for 3 hours, and the pH value of the product was adjusted to neutral with dilute hydrochloric acid, filtered with suction, washed with methanol and absolute ethanol in sequence, and dried to constant weight to obtain quaternized cotton fibers.

[0034] Add 5.0g of quaternized cotton fiber and 400ml of deionized water into a three-necked f...

Embodiment 2

[0036] Weigh viscose fiber 10g, place in 300ml mass concentration of 1% sodium hydroxide solution, boil for 60min, take it out after cooling, squeeze dry and place in 280ml mass concentration of 15% sodium hydroxide solution, let stand at room temperature Set it aside for 90 minutes, take it out, wash it with deionized water, and dry it to obtain alkaline viscose fiber.

[0037] Take 6.0g of alkaline viscose fiber, place it in a three-necked flask equipped with 320ml of acetone, slowly add 6ml of a mass concentration of 30% sodium hydroxide solution dropwise under electric stirring, and then add dropwise 15g of 3-chloro-2-hydroxypropyl Trimethylammonium chloride, after reacting in a water bath at 50°C for 200min, 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 at 40°C to constant weight to obtain quaternized ammonium viscose glue fiber.

[0038] Add 5.0g of quaterniz...

Embodiment 3

[0040] Weigh 10g of microcrystalline cellulose, put it in 250ml of 0.5% sodium hydroxide solution, boil for 60min, filter it with suction after cooling, put it in 200ml of 10% sodium hydroxide solution, and let it stand at room temperature After 120 minutes, take it out, wash it with deionized water, and dry it to obtain alkaline microcrystalline cellulose.

[0041] Take 8.0g of basic microcrystalline cellulose, place in a three-necked flask equipped with 200ml of acetone, slowly add 8ml of a mass concentration of 10% sodium hydroxide solution dropwise under magnetic stirring, and then add dropwise 16g of 3-chloro-2-hydroxypropyl Trimethyl ammonium chloride, after reacting in a water bath at 45°C for 3 hours, adjust the pH value of the product to neutral with dilute hydrochloric acid, filter it with suction and wash it with methanol and absolute ethanol in turn, and dry it at 60°C to constant weight to obtain quaternized ammonium microcrystalline cellulose.

[0042] Add 5.0g ...

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Abstract

The invention discloses amphoteric cellulose material and application thereof. Cellulose is subjected to alkali pretreatment to obtain alkali cellulose and achieve hydroxyl activation; 3-chloro-2 hydroxypropyl trimethyl ammonium chloride is used as etherifying agent to perform quaternization modification on the alkali cellulose so as to obtain quaternized cellulose; ceric ammonium nitrate is used as initiator and monomer 2-acrylamide-2-methyl propane sulfonic acid to perform sulphonation on the quaternized cellulose. The prepared quaternized and sulfated cellulose has good hydrophilicity, high reaction activity, bulky macrostructure and porous microstructure, is capable of adsorbing negatively charged anion, negatively charged anionic compound, positively charged cation and positively charged compound in the same time, is high in adsorption capacity, is applicable to the fields such as treatment of heavy metal ion waste water and treatment of organic waste water, and can also serve as functional carriers of other materials.

Description

technical field [0001] The invention relates to an amphoteric cellulose material and its application, in particular to amphoteric quaternary ammonium-sulfonated cellulose and its application, and belongs to the field of functional materials. Background technique [0002] Cellulose is a fibrous polycapillary stereoregular natural polymer with the characteristics of porous and large specific surface area, and contains many hydrophilic hydroxyl groups in the molecule, which has a certain adsorption capacity for small organic molecules and heavy metal ions. It provides a favorable premise for preparing adsorbent materials with good performance through modification. However, when natural cellulose is directly used as an adsorbent, its adsorption capacity is limited and its selectivity is low. This is because there are a large number of hydroxyl groups in its structure, resulting in the formation of hydrogen bonds within and between its molecular chains. This hydrogen bond widely ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/02C08F220/58C08B15/06B01J20/24C02F1/28C02F1/62
Inventor 陈宇岳熊佳庆林红苏公磊
Owner SUZHOU UNIV
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