High water absorption composite material and its preparation method

A composite material and high water absorption technology, applied in the field of high water absorption composite material and its preparation, can solve the problems of high cost, difficult large-scale application, poor environmental compatibility and the like

Inactive Publication Date: 2007-04-18
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present, some superabsorbent resins made of pure chemicals are difficult to apply on a large scale due to their high cost and poor environmental compatibility.

Method used

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  • High water absorption composite material and its preparation method
  • High water absorption composite material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Weigh 4g of acrylic acid monomer solution in a beaker, and slowly add 7.11 grams of a 25% sodium hydroxide solution to the acrylic acid with a neutralization degree of 80% (mol percent), while stirring to make it fully mixed, and then add 1.20 grams of acrylamide, after fully dissolving, add 0.0016 grams of N, N'-methylenebisacrylamide, mix evenly, then add 1.60 grams of illite (ground to an average particle size of 5.0-15.0 μm by vibratory grinding) and 1.60 grams of fly ash (finely ground by vibration to an average particle size of 5.0-15.0 μm), fully stirred and ultrasonically dispersed (the power of the ultrasonic generator is 200-4000 watts, and the frequency of the ultrasonic wave is 100 kHz-300 MHz , ultrasonic time is 2-10 minutes). Then weigh 0.0120 grams of potassium persulfate and add it to the mixed solution, stir it evenly, place it in a water bath at 70°C for 2-8 hours, observe continuously, and take out the finished product after the reaction conversion r...

Embodiment 2

[0050] Weigh 4g of acrylic acid monomer solution in a beaker, and slowly add 8.00 g of a 25% sodium hydroxide solution to the acrylic acid in a neutralization degree of 90% (mol percent), while stirring to make it fully mixed, and then add 2.00 grams of acrylamide, after fully dissolving, add 0.0016 grams of N, N'-methylenebisacrylamide, mix evenly, then add 1.60 grams of illite (ground to an average particle size of 5.0-15.0 μm by vibratory grinding) and 1.60 grams of fly ash (finely ground by vibration to an average particle size of 5.0-15.0 μm), fully stirred and ultrasonically dispersed (the power of the ultrasonic generator is 200-4000 watts, and the frequency of the ultrasonic wave is 100 kHz-300 MHz , ultrasonic time is 2-10 minutes). Then take 0.0040 grams of potassium persulfate and add it to the mixed solution, stir it evenly, place it in a water bath at 70°C for reaction, and observe continuously. After the reaction conversion rate is greater than 98%, take out the ...

Embodiment 3

[0052] Weigh 4g of acrylic monomer solution in a beaker, slowly add 4.44g of sodium hydroxide solution with a mass percentage of 25% into the acrylic acid according to the degree of neutralization of 50% (mole percent), while stirring to make it fully mixed, and then add 2.00 grams of acrylamide, after fully dissolving, add 0.0016 grams of N, N'-methylenebisacrylamide, mix evenly, then add 1.60 grams of illite (ground to an average particle size of 5.0-15.0 μm by vibratory grinding) and 1.60 grams of fly ash (finely ground by vibration to an average particle size of 5.0-15.0 μm), fully stirred and ultrasonically dispersed (the power of the ultrasonic generator is 200-4000 watts, and the frequency of the ultrasonic wave is 100 kHz-300 MHz , ultrasonic time is 2-10 minutes). Then take 0.0040 grams of potassium persulfate and add it to the mixed solution, stir it evenly, place it in a water bath at 70°C for reaction, and observe continuously. After the reaction conversion rate is...

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Abstract

This invention relates to a super hydrating composite and its preparation. A super hydrating composite, its characteristic is that it mainly consist of fly ash, illite, acrylic acid, acrylamide, hydroxide solution, water-solubility radical polymerization initiator and cross linking agent raw material, the addition quality of fly ash is 20%-60% of acrylic acid, the addition quality of illite is 20%-60% of acrylic acid, the addition quality of water-solubility radical polymerization polymerization initiator is 0.01%-1% of acrylic acid, the addition quality of acrylamide is 5%-60% of acrylic acid, the addition quality of cross linking agent is 0%-0.5% of acrylic acid, the addition quality of hydroxide solution is that neutralization degree is 40-100 mole percentage after neutralizing acrylic acid; The stated fly ash is grinded by vibration milling to make mean diameter be 5.0-15.0 mum,illite is grinded by vibration milling to make mean diameter be 5.0-15.0 mum. The characteristics of invented product are super hydrophilia, high potassium content, low cost, environment compatibility is better than sodium polyacrylate super hydrating resin.

Description

technical field [0001] The invention relates to a superabsorbent composite material and a preparation method thereof, in particular to a superabsorbent composite material used for drought resistance and water retention in farmland, crop seedling preservation and yield increase, and desert wasteland management. Background technique [0002] Super Absorbent Polymers (English full name Super Absorbent Polymers, referred to as SAP) is a water-swellable functional polymer material containing strong hydrophilic groups such as hydroxyl and carboxyl groups and having a three-dimensional cross-linked network structure. It absorbs water dozens or even thousands of times its own weight and becomes a gel with good water retention. [0003] In 1966, Fanta and others of the Northern Research Institute of the United States Department of Agriculture conducted research on starch-grafted acrylonitrile, and since then began the development of superabsorbent resins. Superabsorbent resins have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/02C08L33/26C08K3/00C08F2/44
Inventor 凌辉沈上越范力仁
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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