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Organic-inorganic composite water retaining agent with fertilizer slow release function and its preparing method

A fertilizer slow-release and inorganic compounding technology, applied in fertilizer mixtures, fertilization devices, applications, etc., can solve problems such as poor site conditions and limited soil organic matter, achieve cost reduction, and improve the effect of soil aggregate structure

Inactive Publication Date: 2006-06-07
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the arid and semi-arid areas of the west, the site conditions are very poor, especially the ecological restoration land, and the organic matter in the soil is very limited.

Method used

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  • Organic-inorganic composite water retaining agent with fertilizer slow release function and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add 2 g of attapulgite and 2 g of humic acid into a beaker with 15 mL of distilled water. Weigh 4.2 g of acrylic acid and add it into 15 mL of distilled water, and add 4 mL of 5M potassium hydroxide dropwise. Then add 1.8 g of acrylamide and stir until dissolved. Add the attapulgite and humic acid liquid that have been stirred into a suspension into the mixed solution of acrylic acid and acrylamide, and then add 0.0143 grams of crosslinking agent and 0.0713 grams of initiator. Raise the temperature to 70°C and keep it for 3-5 hours. The product was dried at 70°C until constant weight, crushed, and passed through a 40-mesh sieve. The product obtained absorbs 664 grams of distilled water per gram, and the color and luster is black.

Embodiment 2

[0019] Add 1 g of attapulgite and 3 g of humic acid into a beaker with 15 mL of distilled water. Weigh 4.2 g of acrylic acid and add it into 15 mL of distilled water, and add 4 mL of 5M potassium hydroxide dropwise. Then add 1.4 g of acrylamide and stir until dissolved. Add the attapulgite and humic acid liquid that have been stirred into a suspension into the mixed solution of acrylic acid and acrylamide, and then add 0.0127 grams of crosslinking agent and 0.0713 grams of initiator. Raise the temperature to 80°C and keep it for 3-5 hours. The product was dried at 70°C until constant weight, crushed, and passed through a 40-mesh sieve. The product obtained absorbs 486 grams of distilled water per gram, and the color and luster is black.

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Abstract

The present invention is composite organic-inorganic water retaining agent with fertilizing slowly releasing function and its preparation process. The fertilizing slowly releasing water retaining agent is prepared with cheap attapulgite, humic acid capable of increasing organic matter in soil, acrylic acid and acrylamide as main material and through adding initiator and cross-linking agent, grafting copolymerization and cross-linking in water solution, washing, drying, and crushing. The water retaining agent has distilled water absorbing capacity of 400-600g / g and cost 30-40 % lower than that of available organic polymer water retaining agent. With water absorbing, water retaining and fertilizer slow releasing functions, the present invention may be used in water-saving agriculture, ecological restoring engineering and other fields.

Description

technical field [0001] The invention relates to an organic-inorganic composite water-retaining agent with fertilizer slow-release function and a preparation method thereof. Background technique [0002] Water-retaining agent is a functional polymer material, applied to the soil can not only fully absorb irrigation water or natural rainfall, prevent water leakage and loss, improve water use efficiency, but also promote the formation of soil aggregates, improve soil pore structure, Prevent soil erosion. Therefore, water-retaining agents have been widely used in agriculture, forestry and other water-saving fields. However, most of the currently commercialized water-retaining agents are prepared by polymerizing acrylic acid or acrylamide, which still have disadvantages such as high cost and poor salt-alkali resistance. In order to further reduce costs and improve the performance of water retaining agents, the development of organic-inorganic hybrid water retaining agents has b...

Claims

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Application Information

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IPC IPC(8): C08L33/02C05G3/70C08F2/44C08F20/06C08K3/34
Inventor 王爱勤李安张俊平
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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