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Method for preparing binary copolymerized water hyacinth carboxymethyl cellulose super absorbent resin

A technology of carboxymethyl cellulose and super absorbent resin, which is applied in the field of preparation of cellulose-based super absorbent resin, achieves the effects of simple synthesis process operation and considerable economic benefits

Inactive Publication Date: 2015-06-10
GUANGDONG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The Chinese invention "Manufacturing method of superabsorbent resin", application number 201010226364.3 discloses a method of adding foaming agent to manufacture superabsorbent resin; The method of adding peroxide to produce resin, water hyacinth carboxymethyl cellulose to produce superabsorbent resin has not been reported yet

Method used

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  • Method for preparing binary copolymerized water hyacinth carboxymethyl cellulose super absorbent resin
  • Method for preparing binary copolymerized water hyacinth carboxymethyl cellulose super absorbent resin
  • Method for preparing binary copolymerized water hyacinth carboxymethyl cellulose super absorbent resin

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Experimental program
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Effect test

Embodiment 1

[0024] Weigh 5g water hyacinth carboxymethyl cellulose, fully dissolve it with deionized water and stir at 35°C, add 0.90g potassium persulfate, and continue stirring for 10 minutes to pre-initiate; prepare 21g NaOH solution and place it in an ice-water bath, and slowly add it to In 38g of acrylic acid solution, adjust the degree of neutralization to 80%, add 6.75g of 2-acrylamide-2 methylpropanesulfonic acid and 0.1g of N,N'-methylenebisacrylamide to the above solution, and stir fully to obtain a mixed solution; The solution is added to the pre-initiated water hyacinth carboxymethyl cellulose solution, so that the volume of the reaction system is 60ml, and the stirring is continued to obtain the final mixed solution; 6gspan-60 and 200ml cyclohexane are added to the three ports with a condenser tube and a nitrogen conduit. In the flask, heat a 500ml three-necked flask in a 35°C oil bath to completely dissolve the oil phase; add the above-mentioned final mixture to the oil phase...

Embodiment 2

[0026] Weigh 7g water hyacinth carboxymethyl cellulose, fully dissolve it with deionized water and stir at 35°C, add 0.57g potassium persulfate, and continue stirring for 10min to pre-initiate; prepare 11.7g NaOH solution and place it in an ice-water bath, and slowly Add it to 30g of acrylic acid solution, adjust the degree of neutralization to 70%, add 20g of 2-acrylamide-2 methylpropanesulfonic acid, 0.09g of N,N'-methylenebisacrylamide to the above solution, and stir thoroughly to obtain a mixed solution; Add the mixed solution to the pre-initiated water hyacinth carboxymethyl cellulose solution, so that the volume of the reaction system is 65ml, and continue to stir to obtain the final mixed solution; In the three-necked flask of the conduit, heat the 500ml three-necked flask in an oil bath at 35°C to completely dissolve the oil phase; add the above-mentioned final mixed solution to the oil phase, fill with nitrogen and exhaust oxygen for 15 minutes, and set the initial tem...

Embodiment 3

[0028]Weigh 10g water hyacinth carboxymethyl cellulose, fully dissolve it with deionized water and stir at 35°C, add 0.50g potassium persulfate, and continue stirring for 10 minutes to pre-initiate; prepare 10.7g NaOH solution and place it in an ice-water bath, and slowly add Add 10g of 2-acrylamide-2 methylpropanesulfonic acid and 0.05g of N,N'-methylenebisacrylamide to the above solution, adjust the degree of neutralization to 65%, and stir thoroughly to obtain a mixed solution; The solution is added to the pre-initiated water hyacinth carboxymethyl cellulose solution, so that the volume of the reaction system is 70ml, continue to stir to obtain the final mixed solution; add 4.6g span-60, 150ml cyclohexane Put a 500ml three-necked flask in a 35°C oil bath and heat it to completely dissolve the oil phase; add the above-mentioned final mixed solution into the oil phase, fill with nitrogen and exhaust oxygen for 15 minutes, and set the initial temperature to 40°C. The temperatu...

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Abstract

The invention relates to a method for preparing binary copolymerized water hyacinth carboxymethyl cellulose super absorbent resin and belongs to the technical field of cellulose super absorbent resin. The method comprises the following steps: by using a reversed phase suspension method, taking span-60 as a disperse phase, taking cyclohexane as an oil phase and adopting the ratio of the oil to water being 3:1, uniformly stirring the hyacinth carboxymethyl cellulose, acrylic acid, and 2-acrylamide-2-methyl propane sulfonic acid at a weight ratio of 5-10: 30-60: 7-30, adjusting the neutralization degree of acrylic acid to 65-80% for use, and performing polymerization reaction by adding an initiator and a crosslinking agent to obtain the binary copolymerized water hyacinth carboxymethyl cellulose super absorbent resin. The water absorbent rate of the super absorbent resin is 900-1200 times and the water absorbent rate for 0.9% normal saline is 30-80 times; the super absorbent resin can be used in the fields such as the agricultural water-retaining agent, the soil improvement and the desertification control, and is simple in synthetic process operation, uniform in reaction and low in production cost; a new development direction is provided for the resource utilization of the water hyacinth, so that the green environmental protection and the efficient utilization of the renewable resources can be realized.

Description

technical field [0001] The invention relates to a method for preparing a superabsorbent resin, in particular to a method for preparing a binary copolymerized water hyacinth carboxymethyl cellulose superabsorbent resin, and belongs to the technical field of cellulose-based superabsorbent resin preparation. Background technique [0002] Super absorbent resin, referred to as SAP, is a new type of functional polymer material that can absorb and maintain hundreds or even thousands of times its own mass of pure water or tens of times of normal saline, usually containing carboxyl, hydroxyl or amino groups, etc. Monomer, with high water absorption rate, strong water retention capacity and good water release capacity. Agricultural superabsorbent resin, also known as water-retaining agent, is the chemical product that has the most impact on agriculture after chemical fertilizers, pesticides, and mulch. Water-retaining agents are used in agricultural production to enhance soil water re...

Claims

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Application Information

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IPC IPC(8): C08F251/02C08F220/06C08F220/58C08F2/32
Inventor 梁美玲彭进平刘超郭建维崔亦华杨楚芬
Owner GUANGDONG UNIV OF TECH
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