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Method for synthesizing superabsorbent resin with carboxymethyl cassava residue as raw material

The technology of superabsorbent resin and carboxymethyl wood is applied in the field of simple preparation, can solve the problems of low utilization, soil and groundwater pollution, environmental pollution and the like, and achieves the effect of cost saving and low price

Active Publication Date: 2018-04-06
INNER MONGOLIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fresh potato dregs have a lot of strains, which are not easy to store and transport, and they will produce stench after spoilage and cause environmental pollution; if they are dried, the cost will be too high, which will increase the burden on enterprises. Love to eat, burial will lead to pollution of soil and groundwater, and the degree of utilization is low

Method used

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  • Method for synthesizing superabsorbent resin with carboxymethyl cassava residue as raw material
  • Method for synthesizing superabsorbent resin with carboxymethyl cassava residue as raw material
  • Method for synthesizing superabsorbent resin with carboxymethyl cassava residue as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: Weigh 1.67g of sodium hydroxide, dissolve it in 27.5ml of deionized water, weigh 15g of acrylic acid, add the above-mentioned sodium hydroxide solution dropwise to acrylic acid under cooling in an ice-water bath and stir to neutralize it (the neutralization degree of acrylic acid 20%), weigh 2.5g carboxymethyl cassava residue and mix with 20ml deionized water, mix the neutralized acrylic acid and its sodium salt with carboxymethyl cassava residue solution, add 7.5ml concentration of 10mg / ml Potassium persulfate solution, 10ml of N,N'-methylenebisacrylamide solution with a concentration of 2mg / ml, nitrogen gas, stirring and heating slowly to gradually increase the temperature of the reaction system, when the temperature rises to 70-80°C Stop stirring when the temperature reaches 90°C and keep warm for 2 hours, take out the product, dry and pulverize to obtain superabsorbent resin, the water absorption of the superabsorbent resin prepared in this example is 367g...

Embodiment 2

[0019] Example 2: The synthesis conditions are the same as in Example 1, except that 2.50g of sodium hydroxide is weighed, dissolved in 27.5ml of deionized water, 15g of acrylic acid is weighed, and the above-mentioned sodium hydroxide solution is added dropwise to acrylic acid under cooling in an ice-water bath Stir in medium to neutralize (the degree of neutralization of acrylic acid is 30%), the water absorption of the superabsorbent resin prepared in this example in 2500 times deionized water is 681g / g.

Embodiment 3

[0020] Example 3: The synthesis conditions are the same as in Example 1, except that 3.33g of sodium hydroxide is weighed, dissolved in 27.5ml of deionized water, 15g of acrylic acid is weighed, and the above-mentioned sodium hydroxide solution is added dropwise to acrylic acid under cooling in an ice-water bath Stir in medium to neutralize (the degree of neutralization of acrylic acid is 40%), the water absorption of the superabsorbent resin prepared in this example in 2500 times deionized water is 701g / g.

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Abstract

The invention discloses a method for synthesizing super absorbent resin by taking carboxymethyl cassava residue as a raw material. The method is mainly characterized by comprising the following steps: firstly, neutralizing acrylic acid by sodium hydroxide under ice-water bath cooling; then, heating in water bath under the protection of nitrogen gas by taking N, N'-methylene bisacrylamide as a cross-linking agent and taking potassium persulfate as an initiator, so that the carboxymethyl cassava residue, part of neutralized acrylic acid and a sodium salt thereof are grafted and polymerized to prepare the super absorbent resin. Highest water absorption amount of 1g of the best product in deionized water which is 2500 times the amount of the best product is 1773g / g. The method for synthesizing super absorbent resin by taking the carboxymethyl cassava residue as a raw material has the advantages as follows: matrix carboxymethyl cassava residue is easily dissolved in water, and does not need to be pasted, used materials are low in price, environment-friendly and energy-saving; and the super absorbent resin disclosed by the invention is simple in synthetic process, easy to operate, low in cost; and moreover, the product performance is excellent, and therefore, the method is more suitable for large-scale production and product popularization.

Description

technical field [0001] The invention relates to a preparation method of a functional polymer material-superabsorbent resin used in the fields of agriculture, forestry and horticulture, desertification control, construction industry, environmental control, etc., especially referring to carboxymethyl cassava residue, acrylic acid and sodium hydroxide as the main raw materials A new and simple preparation method for synthesizing superabsorbent resin. Background technique [0002] Cassava residue is a by-product of cassava processed into starch or alcohol, the main components of which are water, cell debris, starch, cellulose and a small amount of protein. It is usually used as a roughage to feed animals. Fresh potato dregs have a lot of strains, which are not easy to store and transport, and they will produce stench after spoilage and cause environmental pollution; if they are dried, the cost will be too high, which will increase the burden on enterprises. Love to eat, burial ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/02C08F220/06C08F222/38
Inventor 温国华张雨亭杨永启郭玉婷胡振华刘广华冯凯韩宗壮王晨雪韩盼盼赵红霞
Owner INNER MONGOLIA UNIVERSITY
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