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Preparation method for cellulose base water-absorbent resin

A water-absorbent resin and cellulose-based technology, which is applied in the field of preparation of cellulose-based water-absorbent resin, can solve the problems of poor water retention capacity and poor salt resistance, and achieve the effects of improving water retention performance, salt resistance, and strong water retention

Inactive Publication Date: 2017-10-20
常州万博金属构件厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention: Aiming at the drawbacks of traditional cellulose-based water-absorbing resins, such as poor water retention capacity and poor salt resistance, a preparation method of cellulose-based water-absorbing resins is provided

Method used

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  • Preparation method for cellulose base water-absorbent resin

Examples

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example 1

[0020] Take 30g of cellulose, 5mL of ethylenediamine and 100mL of 25% oxidant solution in a beaker, place the beaker in a water bath, control the temperature of the water bath at 70°C, stir and react for 1 hour and then filter to obtain a filter residue. , 15g of N-vinylpyrrolidone and 100mL of solvent were added to a three-necked flask equipped with a thermometer and a reflux device, and the three-necked flask was moved into a digital speed measuring constant temperature magnetic stirrer, and stirred at a temperature of 120°C and a speed of 200r / min After mixing for 10 minutes, add 0.1 g of initiator and 0.3 g of cross-linking agent to the three-necked flask, keep warm for 2 hours and then filter to obtain a filter cake. Then put the three-necked flask in a water bath, control the temperature of the water bath to 60°C, and stir the reaction for 1 hour to obtain the product, pour the product into a rotary evaporator, and concentrate by rotary evaporation for 25 minutes to obtai...

example 2

[0022] Take 35g of cellulose, 7mL of ethylenediamine and 150mL of 25% oxidant solution in a beaker, place the beaker in a water bath, control the temperature of the water bath at 75°C, stir and react for 2 hours and then filter to obtain a filter residue. , 18g of N-vinylpyrrolidone and 150mL of solvent were added to a three-necked flask equipped with a thermometer and a reflux device, and the three-necked flask was moved into a digital speed measuring constant temperature magnetic stirrer, and stirred at a temperature of 125°C and a speed of 250r / min After mixing for 13 minutes, add 0.2 g of initiator and 0.4 g of cross-linking agent to the three-necked flask, keep warm for 3 hours and then filter to obtain a filter cake. Then put the three-necked flask in a water bath, control the temperature of the water bath to 65°C, and stir the reaction for 2 hours to obtain the product, pour the product into a rotary evaporator, and concentrate by rotary evaporation for 28 minutes to obt...

example 3

[0024] Add 40g of cellulose, 8mL of ethylenediamine and 200mL of 25% oxidant solution into a beaker, place the beaker in a water bath, control the temperature of the water bath at 80°C, stir and react for 2 hours and then filter to obtain a filter residue. , 20g of N-vinylpyrrolidone and 200mL of solvent were added to a three-necked flask equipped with a thermometer and a reflux device, and the three-necked flask was moved into a digital speed measuring constant temperature magnetic stirrer, and stirred at a temperature of 130°C and a speed of 300r / min After mixing for 15 minutes, add 0.3 g of initiator and 0.5 g of cross-linking agent to the three-necked flask, keep warm for 3 hours and then filter to obtain a filter cake. Then put the three-necked flask in a water bath, control the temperature of the water bath to 70°C, and stir the reaction for 2 hours to obtain the product, pour the product into a rotary evaporator, and concentrate by rotary evaporation for 30 minutes to ob...

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Abstract

The invention discloses a preparation method for cellulose base water-absorbent resin, and belongs to the field of high polymer materials. Cellulose, ethylenediamine and oxidizing agent solvent react to be filtered to obtain filter residues; then after the filter residues are mixed with N-vinyl pyrrolidone and the solvent, initiator and cross-linking agent are added to react to be filtered to obtain a filter cake; then, the filter cake is mixed with monochloroacetic acid and water, and stirring reaction is carried out to obtain a product; the product is condensed to obtain concentrated solution; after thionyl chloride is added to react, nitroguanidine is added to react to be subjected to concentration drying to obtain a drying product, i.e., the cellulose base water-absorbent resin. The cellulose base water-absorbent resin has the beneficial effects of relatively good water retaining capacity and salt tolerance and is worth popularizing and using.

Description

technical field [0001] The invention relates to a preparation method of a cellulose-based water-absorbing resin, belonging to the field of polymer materials. Background technique [0002] Superabsorbent resin is a new type of functional polymer material, which has a hydrophilic group, can absorb a large amount of water and swells and can keep the water from flowing out, such as starch grafted acrylate, grafted acrylamide, high substitution Cross-linked carboxymethyl cellulose, cross-linked carboxymethyl cellulose grafted acrylamide, cross-linked hydroxyethyl cellulose grafted acrylamide polymer, etc., generally used as medical materials, such as diapers, sanitary napkins, etc., industrial It is also used as a plugging material. [0003] The raw material of the commonly used synthetic superabsorbent and water-retaining resin is petroleum, which has problems such as dependence on raw materials, non-renewability, high production cost, and non-biodegradable, etc., which limits ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/02C08F226/10C08F8/30C08B15/02C08J3/24C08L51/02
CPCC08F226/10C08B15/02C08F8/30C08J3/24C08J2351/02C08F251/02
Inventor 高产明方晓俊宋玲
Owner 常州万博金属构件厂
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