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Water retaining fertilizer retaining multifunction polymer composite material and its preparation method

A technology of water and fertilizer conservation and composite materials, applied in fertilizer mixtures, fertilization devices, applications, etc., can solve the problems of difficult implementation of graft copolymerization, pollution of groundwater sources, and low utilization rate, so as to reduce chemical fertilizer pollution, reduce pollution, The effect of alfalfa growth promotion

Inactive Publication Date: 2007-04-18
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the fertilizer is used in physical infiltration, the loss of fertilizer is serious, and the utilization rate is not high. If the fertilizer seeps into the ground, it may pollute the groundwater source and cause new pollution problems.
The graft copolymerization method is more difficult to realize in terms of synthesis

Method used

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  • Water retaining fertilizer retaining multifunction polymer composite material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] Preparation method of sample 1#:

[0073] 1), select raw materials:

[0074] The polymer water-absorbing agent selects hydroxycellulose grafted acrylic acid sodium salt polymer water-absorbing agent (for existing, belongs to cellulose-grafted acrylic acid polymer water-absorbing agent class),

[0075] Powder particle size 200 mesh 39.85g,

[0076] Polyurea-formaldehyde powder particle size 200 mesh 5g was selected as polymer slow-release nitrogen fertilizer.

[0077] Inorganic fertilizer selects potassium dihydrogen phosphate and potassium chloride 5g (potassium dihydrogen phosphate and potassium chloride are each 2.5g),

[0078] Polyether Trihydric Alcohol PPG5613 Hydroxyl Value About 56mg KOH / g Industrial Grade, 30g,

[0079] Toluene diisocyanate (TDI) 18g,

[0080] Stannous octoate 0.05g,

[0081] Triethylenediamine 0.1g,

[0082] water 1.5g,

[0083] Silicone oil 0.5g;

[0084] 2) Take 30g of polyether triol, add 1.5g of water, 0.05g of stannous octoate, 0.1...

Embodiment 2

[0097] A method for preparing a water- and fertilizer-retaining multifunctional polymer composite material, comprising the steps of:

[0098] 1). Preparation of polyurethane flexible foam material: according to the weight of raw materials: 30 parts of polyether triol PPG5613, 18 parts of toluene diisocyanate, 0.15 parts of catalyst, 0.5 parts of silicone oil, and 1.5 parts of water to select polyether ternary Alcohol PPG5613, toluene diisocyanate, catalyst, silicone oil and water; stir polyether trihydric alcohol PPG5613, water, catalyst and silicone oil at room temperature, stir for 9-11 minutes, quickly add toluene diisocyanate, stir for 8-9 seconds After 10 minutes, foam under natural conditions to obtain the initial soft foam of polyurethane; wherein the catalyst is stannous octoate and dibutyltin dilaurate, and the parts by weight are: 0.1 part of stannous octoate, dibutyltin dilaurate Acid tin 0.05 part.

[0099] 2). Mixed foaming, curing and post-treatment: according t...

Embodiment 3

[0102] A method for preparing a water- and fertilizer-retaining multifunctional polymer composite material, comprising the steps of:

[0103] 1). Preparation of polyurethane flexible foam material: according to the weight of raw materials: 30 parts of polyether polyol, 18 parts of toluene diisocyanate, 0.15 part of catalyst, 0.5 part of silicone oil, 1.5 parts of water, select polyether polyol, toluene Diisocyanate, catalyst, silicone oil and water; stir polyether polyol, water, catalyst and silicone oil evenly at room temperature, after stirring for 11 minutes, quickly add toluene diisocyanate, stir for 8-9 seconds, and foam under natural conditions , to obtain the initial flexible foam of polyurethane; wherein the catalyst is triethanolamine and dibutyltin dilaurate, and the parts by weight are: 0.1 part of triethanolamine, 0.05 part of dibutyltin dilaurate, and the polyether Polyol is a mixture of polyether triol PPG5613, polyether N330, polyether Propylan 1 and polyether Pro...

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Abstract

This invention relates to a multifunctional high polymer composite which has the ability of hydrating, water holding and delayed release of chemical fertilizer and its preparation. The feature of the invention is that it is formed formblely by a mixture of high polymer bibulous, delayed release high polymer nitrogenous fertilizer, inorganic phosphate fertilizer, potash fertilizer and polyurethane soft foam. The weight amount of raw materials is that high polymer bibulous 10-40, delayed release high polymer nitrogenous fertilizer 5-20, inorganic phosphate fertilizer 2.5-10, potash fertilizer and polyurethane soft foam 50-51.

Description

technical field [0001] The invention relates to a multifunctional polymer composite material capable of absorbing water, retaining water, and releasing chemical fertilizers slowly and a preparation method thereof. Background technique [0002] Desertification is one of the serious environmental problems faced by human society in the 21st century. In my country's arid and semi-arid areas, nearly 400 million people are harmed by desertification. The prevention and control of desertification has been widely concerned by the international community. Soil water storage, fertilization, and fertilizer conservation in desertified land have become two key issues that need to be resolved in the restoration and improvement of desertified soil. Therefore, it is necessary to develop an ecological functional composite material suitable for the desert environment, overcome the disadvantages of water content, low water retention rate and lack of growth elements in the desert soil environm...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08K3/00C08G18/48C05G3/00C08G101/00
Inventor 王勇刘洁
Owner WUHAN UNIV OF TECH
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