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 affecting the effect of water-absorbing agents and long storage time, so as to improve the survival rate of afforestation, increase the concentration, and increase production. Effect

Inactive Publication Date: 2006-02-15
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, whi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 20 parts (weight parts, the same below) of cross-linked starch are loaded into a reactor, 1000 parts of water are added, nitrogen is passed through, stirred, heated to 80° C. for gelatinization for half an hour; then cooled to 40° C., and the mass concentration is 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 mass of the monomer); Stir and react for 2 hours; then add 500 parts of tannin solution (mass concentration is 2%), react for half an hour; stop feeding nitrogen, be warming up to 60 ℃, add 1000 parts of 1mol / l sodium hydroxide aqueous solution, constant temperature hydrolysis 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 product of the present invention in powder form.

Embodiment 2

[0046] 40 parts of starch esters (parts by weight, the same below), put into the reactor, add 1000 parts of water, pass nitrogen, stir, heat to 80 ℃ for gelatinization for half an hour; 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 mass of the monomer), and stir at a slow speed for 2 hours at 40 ° C; then add tannin solution (mass concentration is 2%) 800 parts, react for half an hour; stop feeding nitrogen, be warming up to 60 ℃, add 1000 parts of 1mol / l sodium hydroxide aqueous solution, hydrolyze at constant temperature for 2 hours; then the obtained hydrolyzate is washed with water to pH The value is 7, dehydrated, dried to constant weight, ground and pulverized to obtain the product of the present invention in powder form.

Embodiment 3

[0048]60 parts (weight parts, the same below) of grafted starch are loaded into the reactor, 1000 parts of water are added, nitrogen is passed, stirred, heated to 80° C. for gelatinization for half an hour; then cooled to 40° C., the mass concentration is 0.2% 500 parts of cerium nitrate solution, then add 500 parts of acrylonitrile solution with a mass concentration of 20%, and add bis-methacrylamide (1.25% of the mass of the monomer), and stir at a slow speed for 2 hours at 40 ° C; then add 500 parts of tannin solution (mass concentration is 2%), react for half an hour; stop feeding nitrogen, be warmed up to 60 ℃, add 1000 parts of 1 mol / l sodium hydroxide aqueous solution, hydrolyze at constant temperature for 2 hours; then use the obtained hydrolyzate with Washed with water to pH 7, dehydrated, dried to constant weight, ground and pulverized to obtain the product of the present invention in powder form.

[0049] Water absorption speed

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PUM

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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 present invention relates to a soil water-retaining agent, in particular to a water-retaining agent containing plant polyphenols. The present invention also relates to a preparation method of the plant polyphenol water-retaining agent. 【Background technique】 [0002] At present, the water-absorbent resin widely used in forestry and afforestation in arid and semi-arid areas is generally a starch graft type, which requires high water absorption and good water retention, as well as repeated water absorption. [0003] This type of water-absorbing agent is based on starch gelatinization and graft copolymerization with olefinic hydrophilic monomers, which has the advantages of promoting high seedling emergence rate, early seedling emergence, fast growth and high preservation rate. The water-absorbing soil formed after it is evenly mixed with the soil, the saturated water content of the soil is obviously higher than that of the control, which increases...

Claims

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Application Information

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IPC IPC(8): C08F251/00C09K17/18
Inventor 张力平
Owner BEIJING FORESTRY UNIVERSITY
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