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Method for preparing absorbent resin by grafting acrylic acid with potato starch

A technology of potato starch and grafted acrylic acid, which is applied in the field of polymer materials, can solve the problems of affecting soil quality, high product cost, and difficult degradation of the product, and achieves the effect of simple production process and low cost

Inactive Publication Date: 2011-06-15
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Most of the existing water-absorbent resins are mainly synthesized by acrylic series, which are all synthetic materials, or mainly synthesized by acrylic acid / cellulose. Most of the water-absorbent resins made of these materials have high polymerization reaction temperature, high product cost, and the product is not easy to degrade or It is not easy to completely degrade, and it may affect the soil quality and other issues when applied in the agricultural field
There are many ways to prepare water-absorbing resin by modifying starch. Potato starch is an advantageous resource in my country, but because its structure is different from starches such as corn and beans, although its own structural strength is better, it is used as a The main material is generally feasible to polymerize at a relatively high temperature, but the preparation of degradable and environmentally friendly water-absorbent resins by polymerization at medium and normal temperatures has not been resolved for a long time. get well resolved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A. Take 100g of acrylic acid, and dissolve 24g of sodium hydroxide into a saturated solution, and neutralize the acrylic acid to a neutralization degree of 65% to form component I;

[0015] B. Take 18g of potato starch, according to the mass ratio of potato starch: water of 1:16, add water and stir at 85°C, and gelatinize, cool to 5°C; take 0.15g of N-N bisacrylamide, press N-N bisacrylamide Amide: The mass ratio of water is 1:5, dissolved in water, and then the solution is mixed evenly with gelatinized potato starch to form component II;

[0016] C. Get 0.5g potassium persulfate and sodium sulfite, wherein the mass ratio of potassium persulfate and sodium sulfite is 1: 0.1, and the mass ratio of potassium persulfate and sodium sulfite: water is 1: 40, add water and mix evenly, and prepare oxidation-reduction Initiator system, i.e. component III;

[0017] D. Mix half of component III with component I to form component IV, and the other half with component II to form co...

Embodiment 2

[0020] A. Take 100g of acrylic acid, and dissolve 40g of potassium hydroxide into a saturated solution, and neutralize the acrylic acid to a neutralization degree of 95% to form component I;

[0021] B. Take 40g of potato starch, according to the mass ratio of potato starch: water of 1:30, add water and stir at 100°C, and gelatinize, cool to 30°C; take 0.35g of N-N bisacrylamide, press N-N bisacrylamide Amide: the mass ratio of water is 1:50, dissolved in water, and then the solution is mixed evenly with gelatinized potato starch to form component II;

[0022] C. Get 4.5g potassium persulfate and sodium sulfite, wherein the mass ratio of potassium persulfate and sodium sulfite is 1: 0.4, and the mass ratio of potassium persulfate and sodium sulfite: water is 1: 23, add water and mix evenly, and prepare oxidation-reduction Initiator system, i.e. component III;

[0023] D. Mix half of component III with component I to form component IV, and the other half with component II to f...

Embodiment 3

[0026] A. Take 100g of acrylic acid, and dissolve 60g of potassium hydroxide into a saturated solution, and neutralize the acrylic acid until the neutralization degree is 80%, to form component I;

[0027] B. Take 30g of potato starch, according to the mass ratio of potato starch: water of 1:5, add water and stir at 90°C, and gelatinize, cool to 40°C; take 0.24g of N-N bisacrylamide, press N-N bisacrylamide Amide: The mass ratio of water is 1:25, dissolved in water, and then the solution is mixed evenly with gelatinized potato starch to form component II;

[0028] C. Get 2.5g potassium persulfate and sodium sulfite, wherein the mass ratio of potassium persulfate and sodium sulfite is 1: 0.6, and the mass ratio of potassium persulfate and sodium sulfite: water is 1: 90, add water and mix evenly, and prepare oxidation-reduction Initiator system, i.e. component III;

[0029] D. Mix half of component III with component I to form component IV, and the other half with component II ...

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Abstract

The invention provides a method for preparing absorbent resin by grafting acrylic acid with potato starch. The method comprises the following steps of: neutralizing the acrylic acid with sodium hydroxide or potassium hydroxide to prepare a component I; adding water into the potato starch, stirring, gelatinizing the potato starch, and after cooling the gelatinized potato starch, adding N-N bisacrylamide to prepare a component II; adding water into potassium peroxodisulfate and sodium sulfite to prepare a component III, mixing a half of the component III and the component I to prepare a component IV, and mixing the other half of the component III and the component II to prepare a component V; and mixing the component IV and the component V, reacting the component IV and the component V until no volatile substance is generated, and placing the product at a middle and high temperature for 2 to 5 hours to obtain the absorbent resin. The distilled water absorption rate of the obtained absorbent resin is 300 to 1,200g / g; and the water absorption rate for 5.0 percent NaCl aqueous solution is 35 to 125g / g. A special oxidation-reduction initiator system serves as a core in the method to fulfill the aims of simple production process, low cost and degradable product; the environmentally-friendly absorbent resin can be prepared by grafting the acrylic acid with the potato starch at the normal temperature; and the obtained absorbent resin can be applied to industries, such as agriculture, gardening, medicaments, health and the like.

Description

technical field [0001] The invention relates to a method for preparing a water-absorbing resin by grafting potato starch with acrylic acid, and belongs to the field of polymer materials. Background technique [0002] Most of the existing water-absorbent resins are mainly synthesized by acrylic series, which are all synthetic materials, or mainly synthesized by acrylic acid / cellulose. Most of the water-absorbent resins made of these materials have high polymerization reaction temperature, high product cost, and the product is not easy to degrade or It is not easy to completely degrade, and its application in the agricultural field may affect soil quality and other issues. There are many ways to prepare water-absorbing resin by modifying starch. Potato starch is an advantageous resource in my country, but because its structure is different from starches such as corn and beans, although its own structural strength is better, it is used as a The main material is generally feasib...

Claims

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Application Information

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IPC IPC(8): C08F251/00C08F220/06C08F4/40
Inventor 刘东辉朱文豪樊惠付田妮
Owner KUNMING UNIV OF SCI & TECH
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