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Anion-responsive controlled-release membrane material special for saline-alkali soil and preparation method thereof

A saline-alkali soil, anionic technology, applied in application, fertilizer mixture, layered/coated fertilizer, etc., can solve the problems of short release period, poor water resistance, etc., and achieve the effect of improving quality, reducing pH value, and promoting activity

Inactive Publication Date: 2021-01-29
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Currently widely used coating materials include sulfonic acid and organic polymer materials, but these coating materials are brittle, have poor water resistance, and have a short sustained release period, and the research on coating materials specifically for saline-alkali land is still in its infancy stage, so there is a long way to go to study slow-release films

Method used

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  • Anion-responsive controlled-release membrane material special for saline-alkali soil and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0054] At room temperature (20°C), weigh 200 parts of hydroxyethyl chitin and 200 parts of polyaspartic acid with a mass ratio of 1:1, respectively dissolve polyaspartic acid and hydroxyethyl chitin in 500 1 part of chloroform to make base solution, 1 part of ferrous sulfate, 0.3 part of calcium gluconate, 0.5 part of barium nitrate and 10 parts of 6,8-difluoro-1-(2-fluoroethyl)1,4-dihydro -Add the saturated solution of 7-(4-methyl-1-piperazinyl)-4-oxo-3-quinolinecarboxylic acid into the base solution, then add 0.05 parts of hydroxybenzoic acid and 0.05 parts of sulfuric acid, and stir evenly to prepare The coating solution was reacted at 20°C for 2 hours, and finally the coating solution was poured on an acrylic plate, and then dried at room temperature for 8 hours, washed with ammonia water, and dried at 50°C to obtain the required chloride-rich coastal saline-alkali land special buffer Controlled release coating material.

Embodiment 2

[0056] At room temperature (20°C), weigh 300 parts of carboxymethyl chitin and 100 parts of polyglutamic acid with a mass ratio of 3:1, respectively dissolve polyglutamic acid and carboxymethyl chitin into 800 parts To make a solution in carbon tetrachloride, 0.5 parts of ferrous nitrate, 1 part of calcium phosphate, 8 parts of barium carbonate and 8 parts of 6,8-difluoro-1-(2-fluoroethyl)1,4-dihydro -Add the saturated solution of 7-(4-methyl-1-piperazinyl)-4-oxo-3-quinoline carboxylic acid into the base solution, then add 0.05 parts of gluconic acid and 0.08 parts of phosphoric acid, and stir evenly to obtain the package Membrane solution, react at 26°C for 5h, and finally pour the coating solution onto an acrylic plate, then dry at room temperature for 10h, wash acid with ammonia water, and dry at 50°C to obtain the desired North China floodplain containing chloride and sulfate Special slow and controlled release coating material for saline-alkali land.

Embodiment 3

[0058] At room temperature (20°C), weigh 400 parts of aminochitin and 200 parts of polyaspartic acid with a mass ratio of 2:1, and dissolve polyaspartic acid and aminochitin into 1000 parts of ether to prepare Solution, 0.5 parts of ferrous oxalate, 0.5 parts of calcium lactate, 10 parts of barium carbonate and 0.5 parts of 6,8-difluoro-1-(2-fluoroethyl) 1,4-dihydro-7-(4-methyl Base-1-piperazinyl)-4-oxo-3-quinoline carboxylic acid saturated solution was added to the base solution, then 0.08 parts of 2-hydroxypropionic acid and 0.08 parts of boric acid were added, and the coating solution was obtained by stirring evenly, 32 React at ℃ for 8 hours, and finally pour the coating solution on an acrylic plate, then dry at room temperature for 6 hours, wash the acid with ammonia water, and dry at 70℃ to obtain the required slow and controlled release of sulfate-rich saline-alkali land in the northwest inland desert Envelope material.

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Abstract

The invention provides a special slow / controlled-release membrane material for saline-alkali soil, which is prepared from the following raw materials in parts by weight: 300-1000 parts of organic polymer material, 300-2000 parts of organic solvent, 0.05-5 parts of catalyst, 0.05-2 parts of crosslinking agent, 0-20 parts of anion response material and 100-1000 parts of distilled water. The organicpolymer material comprises chitin and polyamino acid; wherein the mass ratio of chitin to polyamino acid is 1-5: 1. The added anion response material is used as an alkali-resistant monomer to be combined into a polymer system through hydrogen-bond interaction, the adding proportion is changed, precipitation reaction is carried out with Cl<->, HCO<3->, CO3<2-> and SO4<2-> ions causing alkalinity rise in different types of soil, anions in the soil are passivated, the transmittance of materials in the film is reduced, and meanwhile, the materials enter the position below a plough layer along withirrigation water, the total salt content of the soil is reduced.

Description

technical field [0001] The invention belongs to the technical field of soil improvement, and in particular relates to a special slow-release membrane material for anion-responsive saline-alkali soil and a preparation method thereof. Background technique [0002] Saline-alkali soils are distributed in nearly 100 countries and regions on five continents in the world. According to incomplete statistics from UNESCO and FAO, the global saline-alkali soil area is about 945×10 6 hm 2 , and there is a trend of continuous growth. In my country, the total area of ​​saline-alkali land is about 9.913 × 10 7 hm 2 . With the progress of society and the growth of the population, the shortage of land resources and the deterioration of the ecological environment are accompanied. As an important land resource, saline-alkali land has the characteristics of large total area and wide distribution. The area of ​​saline-alkali land with potential utilization is about 200 million mu, and nearly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/40C05G5/30
CPCC05G3/40C05G5/30
Inventor 胡树文刘晋高子登许紫峻任雪芹
Owner CHINA AGRI UNIV