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Plant polyphenol water-loss reducer and its preparation method

A plant polyphenol and water-retaining agent technology, applied in chemical instruments and methods, fertilizer mixtures, applications, etc., can solve the problems of long storage time and affecting the effect of water-absorbing agents, so as to increase the concentration, improve the survival rate of afforestation, and increase production. Effect

Inactive Publication Date: 2007-12-05
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the general water-absorbing agent, due to the chemical composition, will be eroded by soil microorganisms after being placed in the soil for a long time, which will degrade the water-absorbing agent and directly affect the effect of the water-absorbing agent. This is not solved in the current soil water-absorbing agent question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 20 parts of cross-linked starch (parts by weight, the same below), put into a reactor, add 1000 parts of water, pass nitrogen, stir, heat to 80°C for half an hour to gelatinize; then cool to 40°C, add a mass concentration of 0.2% 500 parts of potassium persulfate solution, then add 500 parts of acrylamide solution with a mass concentration of 16%, and add N-N'-methylenebisacrylamide (1.25% of the monomer mass), and slowly Stir and react for 2 hours; then add 500 parts of tannin solution (mass concentration is 2%), and react for half an hour; stop nitrogen flow, heat up to 60°C, add 1000 parts of 1mol / l sodium hydroxide aqueous solution, and hydrolyze at constant temperature for 2 hours; Then the obtained hydrolyzate is washed with water until the pH value is 7, dehydrated, dried to constant weight, ground and pulverized to obtain the powdery product of the present invention.

Embodiment 2

[0046] 40 parts of starch esters (parts by weight, the same below), put into a reactor, add 1000 parts of water, pass nitrogen, stir, and heat to 80°C for gelatinization for half an hour; then cool to 40°C, add a mass concentration of 0.2% 500 parts of ammonium sulfate solution, then add 1000 parts of acrylate solution with a mass concentration of 30%, and add urine fat (1.25% of the monomer mass), and slowly stir and react at 40°C for 2 hours; then add tannin solution (mass concentration is 2%) 800 parts, reacted for half an hour; Stop nitrogen, heat up to 60 ° C, add 1000 parts of 1mol / l sodium hydroxide aqueous solution, hydrolyze at constant temperature for 2 hours; then the hydrolyzate obtained is washed to pH The value is 7, dehydrated, dried to constant weight, ground and pulverized to obtain the powdered product of the present invention.

Embodiment 3

[0048]60 parts of grafted starch (parts by weight, the same below), put into the reactor, add 1000 parts of water, pass nitrogen, stir, heat to 80°C for gelatinization for half an hour; then cool to 40°C, add a mass concentration of 0.2% 500 parts of cerium nitrate solution, then add 500 parts of acrylonitrile solution with a mass concentration of 20%, and add bismethacrylamide (1.25% of the monomer mass), and react with slow stirring at 40°C for 2 hours; then add 500 parts of tannin solution (mass concentration is 2%), reacted for half an hour; Stop feeding nitrogen, be warming up to 60 ℃, add 1000 parts of aqueous sodium hydroxide solution of 1mol / l, constant temperature hydrolysis 2 hours; Then the hydrolyzate obtained with Wash with water until the pH value is 7, dehydrate, dry to constant weight, grind and pulverize to obtain the powdery product of the present invention.

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Abstract

The invention discloses a preparation method for plant polyphenol water-loss reducer. Wherein, after gelatinizating the starch, the unsaturated monomer takes place free-radical graft copolymerization acted by initiator and graft crosslinking initiated by crosslinking agent; accessing the plant polyphenol by activity of graft copolymerization. This product has anti-microbe function with water absorption multiplying power 500-700.

Description

【Technical field】 [0001] The invention relates to a soil water-retaining agent, in particular to a water-retaining agent containing plant polyphenols. The invention also relates to a preparation method of the plant polyphenol water retaining agent. 【Background technique】 [0002] At present, the water-absorbing resins widely used in forestry and afforestation in arid and semi-arid areas are generally starch-grafted types, which require high water absorption, good water retention, and repeated water absorption. [0003] This kind of water-absorbing agent is grafted and copolymerized with ethylenic hydrophilic monomer after starch gelatinization, which has the advantages of promoting high seedling emergence rate of forest trees, early emergence of seedlings, fast growth and high preservation rate. The water-absorbing soil formed after it is uniformly mixed with the soil, the saturated moisture content of the soil is obviously higher than that of the control, which increases t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/00C09K17/18
Inventor 张力平李俊清
Owner BEIJING FORESTRY UNIVERSITY
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