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Bentonite hybridization absorption material and its preparing process

A technology of water-absorbing materials and bentonite, which is applied in the field of bentonite hybrid water-absorbing materials and its preparation, can solve the problems of restricting popularization and application, high cost of high water-absorbing materials, etc., and achieve the effects of increasing crop yield, good compatibility, and abundant raw material resources

Inactive Publication Date: 2005-10-12
INST OF POLYMER NORTHWEST NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, 80-85% of the total output of superabsorbent materials in my country is consumed in sanitary products, and the proportion applied in agriculture, forestry and animal husbandry is very small. The main reason is that the high cost of superabsorbent materials restricts its popularization and application.

Method used

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  • Bentonite hybridization absorption material and its preparing process
  • Bentonite hybridization absorption material and its preparing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1, add 6 mol of acrylic acid neutralized with NaOH to make the neutralization degree reach 70% to a flask with a cold water bath and a stirring device, then add 4 mol of acrylamide and fully stir to dissolve it, then add 0.05% cross-linking agent and 30% bentonite, and finally add 1.5% over-initiator under full stirring, gradually raise the temperature to 80°C to initiate polymerization, dry and pulverize the obtained material for water absorption test and apply infrared and X-ray diffraction (model The prepared material was characterized by methods such as D / MAX-IIIC), and the hybrid structure of the material was further determined.

Embodiment 2

[0018] Example 2: Add 3 mol of acrylic acid neutralized with NaOH to a degree of neutralization of 80% into a flask filled with a cold water bath and a stirring device, then add 7 mol of acrylamide and fully stir to dissolve it, then add 0.05% cross-linking agent and 25% bentonite, and finally add 2.5% initiator under full stirring, gradually raise the temperature to 85°C to initiate polymerization, dry and pulverize the obtained material for water absorption test and apply infrared and X-ray diffraction (model is D / MAX-IIIC) and other methods were used to characterize the prepared materials to further determine the hybrid structure of the materials.

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Abstract

The present invention relates to one kind of hybrid of water absorbing material of polyacrylate / acrylamide / bentonite prepared through intercalating copolymerization and its preparation process. The material has distilled water absorbing rate of 200-300 g / g, cost 30-40 % lower than available water keeping agent, and thus wide application foreground in developing dry farming agriculture, planting tree, sand fixing weed plantation and protect ecological environment.

Description

technical field [0001] The invention relates to the characteristics and preparation method of polyacrylic acid salt / acrylamide / bentonite (PAA / AM / MMT) hybrid water-absorbing material prepared by intercalation copolymerization of bentonite. Background technique [0002] Super absorbent material is a new type of functional polymer material. It has strong water absorption capacity, good water retention performance, and does not lose water under pressure. Since the first development and success of super absorbent materials by the Northern Research Center of the United States Department of Agriculture in 1974, the application and promotion of super absorbent materials have developed rapidly, and their applications involve health care, agriculture and horticulture, oil exploration, cables and civil construction. Among them, the thickening of the water phase and the adjustment of the rheological properties of the water phase dispersion are one of its important application fields. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F2/44C08F220/56
Inventor 王云普郝晋清袁昆刘小军李玉峰王荣民张继
Owner INST OF POLYMER NORTHWEST NORMAL UNIV
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