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Superabsorbent composite and preparation method thereof

A water-retaining agent and auxiliary material technology, applied in chemical instruments and methods, fertilizer mixtures, organic fertilizers, etc., can solve the problems of high cost of water-retaining agent, complicated preparation process of modified products of water-retaining agent, adverse effects of high concentration of sodium, etc. Water retention performance, good promotion and application prospects, and significant application effects

Inactive Publication Date: 2012-01-18
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One purpose of the present invention is to provide a composite (mixed) water retaining agent that overcomes the disadvantages of high concentration sodium in view of technical deficiencies such as the high cost of the existing water retaining agent, the complicated preparation process of the modified product of the water retaining agent, and the adverse effects of high concentration sodium. Adverse effects, compared with the existing polyacrylamide or polyacrylate water-retaining agent, the cost is greatly reduced by 20% to 60%, and the water-retaining effect is basically unchanged or improved

Method used

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  • Superabsorbent composite and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Example 1 Preparation of potassium feldspar composite water retaining agent

[0024] Polymerization system: a system prepared by aqueous solution polymerization using conventional water-soluble polymerizable monomers, free radical polymerization initiators and crosslinking agents in the technical field, etc., the same below.

[0025] Add potassium feldspar (200 mesh) to the above-mentioned conventional polymerization system, the addition amount is 10% of the mass of acrylic acid monomer, and dissolve and polymerize in water at a temperature of 60°C to 80°C to obtain a gel-like elastomer. 60 ~ 90℃ Just dry. The water-absorbing ratio of the obtained water-retaining agent can reach about 580 times. According to the general market price, the unit cost of the water-retaining agent in this embodiment is 0.18-10,000 yuan lower than that of the conventional water-retaining agent with the same performance.

Embodiment 2

[0026] Example 2 Preparation of potassium feldspar composite water retaining agent

[0027] Polymerization system: a system prepared by aqueous solution polymerization using conventional water-soluble polymerizable monomers, free radical polymerization initiators and crosslinking agents in the technical field, etc., the same below.

[0028] Add potassium feldspar (200 mesh) to the above-mentioned conventional polymerization system, the addition amount is 20% of the mass of acrylic acid monomer, and dissolve and polymerize in water at a temperature of 60°C to 80°C to obtain a gel-like elastomer. 60 ~ 90℃ Just dry. The water-absorbing ratio of the obtained water-retaining agent can reach about 560 times. According to the general market price, the unit cost of the water-retaining agent in this embodiment is 0.18-10,000 yuan lower than that of the conventional water-retaining agent with the same performance.

Embodiment 3

[0029] Example 3 Preparation of potassium feldspar composite water retaining agent

[0030] Polymerization system: a system prepared by aqueous solution polymerization using conventional water-soluble polymerizable monomers, free radical polymerization initiators and crosslinking agents in the technical field, etc., the same below.

[0031] Add potassium feldspar (200 mesh) to the above-mentioned conventional polymerization system, the addition amount is 40% of the mass of acrylic acid monomer, and dissolve and polymerize in water at a temperature of 60°C to 80°C to obtain a gel-like elastomer. 60 ~ 90℃ Just dry. The water-absorbing ratio of the obtained water-retaining agent can reach about 540 times. According to the general market price, the unit cost of the water-retaining agent in this embodiment is 0.18-10,000 yuan lower than that of the conventional water-retaining agent with the same performance.

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Abstract

The invention discloses a superabsorbent composite and a preparation method thereof. The superabsorbent composite disclosed by the invention comprises a conventional polyacrylamide or polyacrylate water-retaining agent or a mixture of a water absorbent (SAP) and an auxiliary material; the auxiliary material is an organic and / or inorganic auxiliary material; the organic auxiliary material is one or the mixture of restaurant sludge, municipal sludge, beer filtered mud, sugar mill mud, paper mud and plant residues; and preferably, the inorganic auxiliary material is one or the mixture of bentonite, zeolite, potassium feldspar, kieselguhr, magnesite and carbamide. In the invention, the superabsorbent composite is prepared by using a simple mixing and synthesis processing method through adding the cheap auxiliary material with a better cooperation effect with the SAP; the superabsorbent composite has the advantages of good water absorption and water retaining effects and low cost; and the method disclosed by the invention is simple and practical and has significant meanings in actual promotion and application.

Description

technical field [0001] The invention belongs to the technical field of water-retaining agent preparation, and in particular relates to a composite water-retaining agent and a preparation method thereof. Background technique [0002] Super Absorbent Polymer (SAP) is a functional polymer material with a three-dimensional network structure, which can absorb water hundreds of times its own weight. Its strong water absorption and water retention capabilities are widely used in agriculture, forestry, and gardening. In fields such as water conservation, water conservation, and drought resistance, the effects are obvious. [0003] The water-saving effect of water-retaining agent is obvious. Since the 1960s, developed countries such as the United States and Japan have begun to study, but the problem of high price has not been solved for a long time. The current price is generally more than 20,000 yuan / ton, which is difficult to promote and apply. Adding minerals to make composite w...

Claims

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Application Information

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IPC IPC(8): C09K17/40C09K17/20
Inventor 廖宗文毛小云陈晓蓉
Owner SOUTH CHINA AGRI UNIV
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