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Hydrogel with environmental mineral as main component and synthesis method thereof

A synthetic method and hydrogel technology, which is applied in the field of composite hydrogels, can solve problems such as single application range of hydrogels, and achieve the effect of reducing costs

Inactive Publication Date: 2010-10-13
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the scope of application of the above-mentioned hydrogels is relatively single, and the traditional method of obtaining hydrogels by in-situ polymerization of existing organic compounds is used.

Method used

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  • Hydrogel with environmental mineral as main component and synthesis method thereof
  • Hydrogel with environmental mineral as main component and synthesis method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] According to the above-mentioned raw materials or the prepared solution, the proportion of each raw material in the reaction system is: the original soil of laterite accounts for 320g / L, AM accounts for 80g / L, and 80% neutralization degree sodium acrylate accounts for 90g / L; figure 1 The process shown: the three substances are mixed and stirred evenly at room temperature. Join K 2 S 2 o 8 、Na 2 SO 3 Each 4g / L, N,N'-methylenebisacrylamide 2g / L, heat up at 60°C, keep the temperature constant, and stir until gelling. Discharge. Dried, shredded and packaged. The absorption rate of tap water is 75 times, and the absorption rate of distilled water is more than 900 times.

Embodiment 2

[0033] According to the raw materials or solution prepared above, the reaction system is mixed uniformly with 300g / L laterite raw soil, 80g / L AM, and 90g / L sodium acrylate with 80% neutralization degree; stir evenly at room temperature. Join K 2 S 2 o 8 、Na 2 SO 3 Each 4g / L, N, N'-methylenebisacrylamide 2g / L, heat up to 60°C, keep constant temperature and stir, when the liquid starts to thicken, quickly add 10g / L of organic fertilizer or humus dissolved in peroxide, until gel. The hydrogel is naturally heated to 70°C and left to foam, and the temperature is naturally lowered after the reaction is complete. The product was placed in an oven at 60°C and continued to react while drying. When the strength of the hydrogel rises to a certain level, it is crushed and then dried. Measure water absorption ratio. The absorption rate of tap water is 104 times, and the absorption rate of distilled water is 1000 times.

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Abstract

The invention discloses a hydrogel with environmental mineral as a main component, which has the advantages of simple and easy production method and low production cost and can be grafted with fertilizer components needed by the soil and disease resistance needed by crops by a secondary grafting method. The invention also discloses a synthesis method for the hydrogel. The copolymer porous environmental mineral hydrogel is prepared by the in-situ polymerization of the environmental mineral material and high polymer material and two times of grafting, the tap water absorbency of the hydrogel is 75 to 104 times, and the distilled water absorbency is 100 to 1000 times. Since the copolymer with a high grafting rate higher than 90 percent is obtained by the in-situ polymerization of the environmental mineral material and the organic compound and then grafted for the second time, the hydrogel is endowed with special functions, such as the grafting of organic fertilizer, humus and degradable substances.

Description

technical field [0001] The present invention relates to the field of composite hydrogels, more specifically, relates to environmental mineral materials (mainly a kind of laterite original soil containing various metal oxides and trace rare earth elements, hereinafter referred to as "red earth original soil") and organic compounds The synthetic method of preparing hydrogel by reaction and the introduction of organic fertilizer and branched chains with other properties through secondary grafting on hydrogel macromolecules. Background technique [0002] Hydrogel is a high-molecular polymer with a low degree of cross-linking with many hydrophilic groups. When it encounters water, it absorbs water quickly due to the action of hydrophilic groups. Swelling, when the water is absorbed to a certain amount, the retractive force of the macromolecular network makes it reach the saturation of water absorption. The water absorbed in the macromolecular network will be slowly released when...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F220/56C08K3/00C08F8/00
Inventor 商平刘美荣周桂英赵瑞华李明
Owner TIANJIN UNIV OF SCI & TECH