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Nano composite water retention agent with fertilizer slow-released function and preparation method thereof

A nano-composite, slow-release fertilizer technology, applied in the direction of organic fertilizers, fertilizer mixtures, waste fuels, etc., can solve the problems of increasing the cost of water-retaining agents, and achieve good soil improvement effects

Inactive Publication Date: 2007-11-28
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since non-ionic monomers are generally more expensive, this increases the cost of water-retaining agents.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 7.20g of acrylic acid to the reactor, add 20ml of distilled water to dissolve, add 2.45g of cetyltrimethylammonium bromide attapulgite, 2.45g of weathered coal humic acid, 122.3mg of cross-linking agent and 18.4mg of initiator reagent, heated to 70 ° C for 3 h. After the reaction, the product is washed with methanol / water solution, then dried at 70° C. to constant weight, pulverized, and passed through a 40-80 mesh sieve. The product in the present embodiment absorbs 520 grams of distilled water per gram, and the color and luster is black.

Embodiment 2

[0024] Add 7.20g of acrylic acid to the reactor, add 20ml of distilled water to dissolve, add 2.80g of cetyltrimethylammonium bromide attapulgite, 2.60g of weathered coal humic acid, 122.3mg of cross-linking agent and 18.4mg of initiator reagent, heated to 70 ° C for 3 h. After the reaction, the product is washed with methanol / water solution, then dried at 70° C. to constant weight, pulverized, and passed through a 40-80 mesh sieve. The product in the present embodiment absorbs 460 grams of distilled water per gram, and the color and luster is black.

Embodiment 3

[0026] Add 7.20g of acrylic acid to the reactor, add 20ml of distilled water to dissolve, add 2.80g of octadecyltrimethylammonium bromide attapulgite, 2.45g of peat humic acid, 122.3mg of crosslinking agent and 18.4mg of initiator , heated to 70°C for 3h. After the reaction, the product is washed with methanol / water solution, then dried at 70° C. to constant weight, pulverized, and passed through a 40-80 mesh sieve. The product in the present embodiment absorbs 580 grams of distilled water per gram, and the color and luster is black.

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PUM

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Abstract

The present invention discloses one kind of nanometer composite water retaining agent with slow released fertilizer function and its preparation process. The nanometer composite water retaining agent is prepared with organized attapulgite clay, humic acid and acrylic acid as the main material, and through adding initiator and cross-linking agent, graft copolymerization and cross-linking in water solution, washing, drying and crushing. The nanometer composite water retaining agent has distilled water absorbing capacity of 300-600 g / g, and possesses wide application foreground in water saving agriculture, ecological restoring, etc.

Description

technical field [0001] The invention relates to an organic-inorganic nano composite water retaining agent, more specifically to a polyacrylic acid / attapulgite clay / humic acid nano composite water retaining agent and a preparation method thereof. Background technique [0002] Water retaining agent is a functional polymer material that can absorb water hundreds or even thousands of times heavier than itself. Since the first synthesis of water-retaining agents by the Northern Department of Agriculture of the United States in the 1960s, the application in agriculture and forestry has always been a very important application research field of water-retaining agents. There are many kinds of water retaining agents, which can be divided into three series according to the source of raw materials: starch-based, cellulose-based and synthetic resin-based. Starch water retaining agents generally have high water absorption, but their disadvantages are poor salt and alkali resistance, poo...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/04C05F11/02C05G3/80
CPCY02E50/343Y02E50/30Y02W30/40
Inventor 王爱勤张俊平
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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