Method for preparing high water absorbing resin in nutrition type for agricultural use

A super absorbent resin and nutritional technology, applied in the field of super absorbent resin, can solve the problems of high cost of water-retaining agent, low addition of water-retaining agent soil, inability to fundamentally reduce the cost of raw materials, etc., and achieve good biological and chemical stability. , the effect of facilitating industrial production and reducing costs

Active Publication Date: 2007-07-25
CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the application of agriculture, due to the high cost of water-retaining agents, the application and promotion of water-retaining agents have been seriously hindered. Many domestic scientists have done a lot of work in reducing the cost of water-retaining agents, but most of the work is mainly concentrated on the polymerization system. Add cheap materials such as bentonite, kaolin and attapulgite and other inorganic soil minerals to achieve the purpose of reducing costs. Although adding some inorganic minerals can improve the hydrogel strength of the water-retaining material after absorbing water, the amount of water-retaining agent soil with good performance Low, can not fundamentally reduce the cost of raw materials
In addition, the product function only has the same water absorption and water release functions as ordinary water retaining agents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Put 10 parts of acrylamide and 100 parts of acrylic acid in a 250ml beaker, add 400 parts of deionized water and stir to dissolve, adjust the pH value with potassium hydroxide to make the pH value of the system around 7.0, add 10 parts of urea, 100 parts of dihydrogen phosphate Stir and dissolve the ammonium and pass nitrogen for 30 minutes, add 0.05 part of oxidant ammonium persulfate, add 0.1 part of reducing agent sodium metabisulfite and stir evenly, then add 0.05 part of crosslinking agent N, N'-methylenebisacrylamide, in Polymerize at a temperature of 20°C, and the polymerization time is 2 hours. The product is granulated, dried, and pulverized to obtain an agricultural nutritional superabsorbent resin. The water absorption rate of the product is 500 times, and the absorption rate of physiological saline is 80 times.

Embodiment 2

[0011] Put 100 parts of acrylic acid in a 250ml beaker, add 350 parts of deionized water and stir evenly, adjust the pH value with potassium hydroxide, make the pH value of the system around 7.0, add 100 parts of urea, 10 parts of diammonium hydrogen phosphate, stir and dissolve, pass Nitrogen for 30 minutes, add 1.0 parts of potassium persulfate, add 1.0 parts of sodium sulfite, stir evenly, add 0.5 parts of crosslinking agent N, N'-methylene bisphenamide, and polymerize at a temperature of 10 ° C, the polymerization time After 1 hour, the product was dried and pulverized to obtain an agricultural nutritional superabsorbent resin. The water absorption rate of the product is 400 times, and the absorption rate of normal saline is 50 times.

Embodiment 3

[0013] Put 90 parts of acrylamide and 10 parts of acrylic acid in a 250ml beaker, add 400 parts of deionized water and stir to dissolve, adjust the pH value with potassium hydroxide to make the pH value of the system around 7.0, add 80 parts of urea, 80 parts of diammonium hydrogen phosphate After stirring and dissolving, pass nitrogen for 30 minutes, add 0.5 parts of hydrogen peroxide and 0.5 parts of ascorbic acid and stir evenly, add 0.5 parts of cross-linking agent N, N'-methylenebisacrylamide, polymerize at 40 °C, polymerize The time is 1 hour, and the product is granulated, dried and pulverized to obtain an agricultural nutritional superabsorbent resin. The water absorption rate of the product is 200 times, and the absorption rate of normal saline is 30 times.

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PUM

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Abstract

This invention provides a method for preparing agricultural nutritious high absorption resin. The method adds nutritious substances such as diammonium hydrogen phosphate to the polymerization system, and forms composite in the presence of initiator and crosslinker, the water absorption rate of the agricultural nutritious high absorption resin is 200-500 times, and that of physiological saline is 30-80 times. The agricultural nutritious high absorption resin has has both water absorption and nutritious functions.

Description

technical field [0001] The invention belongs to the field of superabsorbent resins, in particular to a method for preparing agricultural nutritional superabsorbent resins Background technique [0002] Although the development and utilization of water retaining agent has only a history of more than 30 years, its development is very noticeable. Whether it is research on synthesis or application promotion, research is very active. There are starches, such as starch grafted acrylate, etc., and synthetics, such as polyacrylates, cellulose, etc., and the polymerization forms include aqueous solution polymerization, reversed phase suspension polymerization, etc. , The form of the product is powder, bead, film and fiber and so on. [0003] In the application of agriculture, due to the high cost of water-retaining agents, the application and promotion of water-retaining agents have been seriously hindered. Many domestic scientists have done a lot of work in reducing the cost of wate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F2/44C08F4/40C08K5/20C08F220/06
Inventor 白福臣张志成温诗渺于力潘振远
Owner CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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