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Itaconic acid-aspartic acid binary copolymer with nutrient chelating and growth promoting functions and preparation method thereof

A technology of aspartic acid binary copolymer and aspartic acid, applied in nitrogen fertilizer and other directions, can solve problems such as low chelation efficiency, achieve good chelation effect, promote the growth and development of seedlings, and promote the effects of seed germination

Active Publication Date: 2022-03-04
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Amino acids are the third-generation trace element additives that have developed rapidly in recent years, especially aspartic acid, which has the characteristics of high biological potency, easy absorption, safety and non-toxicity, etc. It can promote seed germination and seedling growth, and improve the quality of crops. Stress resistance, but low chelation efficiency

Method used

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  • Itaconic acid-aspartic acid binary copolymer with nutrient chelating and growth promoting functions and preparation method thereof
  • Itaconic acid-aspartic acid binary copolymer with nutrient chelating and growth promoting functions and preparation method thereof
  • Itaconic acid-aspartic acid binary copolymer with nutrient chelating and growth promoting functions and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation method of the itaconic acid-aspartic acid binary copolymer provided by the present embodiment comprises the following steps:

[0033] S1. Add 26g of itaconic acid and 106.4g of aspartic acid (molar ratio 1:4) into a reactor equipped with an electric stirrer, a separatory funnel, a thermometer and a reflux condenser, and then add 662g of phosphate buffer solution , at a speed of 300r / min, heated in a water bath at a temperature of 95°C, and stirred until completely dissolved.

[0034] S2, with deionized water, 6.6g ammonium persulfate (5% of the total mass of itaconic acid and aspartic acid) is mixed with an aqueous solution of mass concentration 50%, and the constant pressure dropping funnel is added dropwise to the obtained product of step S1 at a constant speed. In the solution, the dropwise addition time is 2 hours, and then the reaction is carried out at 95° C. for 3 hours.

[0035] S3. Cool to room temperature, add 150 mL of a solvent mixed with et...

Embodiment 2

[0037] The preparation method of the itaconic acid-aspartic acid binary copolymer provided by the present embodiment comprises the following steps:

[0038] S1, add 52g itaconic acid and 106.4g aspartic acid (molar ratio is 1:2) in the reactor that electric stirrer, separatory funnel, thermometer and reflux condenser are housed, then add 475g deionized water, At a speed of 150r / min and heated in a water bath at a temperature of 90°C, stir until completely dissolved.

[0039] S2, with deionized water, 7.92g ammonium persulfate (5% of the total mass of itaconic acid and aspartic acid) is formulated into an aqueous solution with a mass concentration of 25%, and the constant pressure dropping funnel is added dropwise to the obtained product of step S1 at a constant speed. In the solution, the dropwise addition time is 1 hour, and then the reaction is carried out at 90° C. for 2 hours.

[0040] S3. Cool to room temperature, add 120mL of solvent mixed with ethanol and acetone at a ...

Embodiment 3

[0042] The preparation method of the itaconic acid-aspartic acid binary copolymer provided by the present embodiment comprises the following steps:

[0043] S1, add 65g itaconic acid and 66.5g aspartic acid (molar ratio is 1:1) in the reactor that electric stirrer, separatory funnel, thermometer and reflux condenser are housed, then add 526g deionized water, At a speed of 100r / min and heated in a water bath at a temperature of 85°C, stir until completely dissolved.

[0044] S2, with deionized water, 6.56g ammonium persulfate (5% of the total mass of itaconic acid and aspartic acid) is mixed with an aqueous solution of mass concentration 40%, and the constant pressure dropping funnel is added dropwise to the obtained product of step S1 at a constant speed. In the solution, the dropwise addition time was 1.5 hours, and then kept at 85° C. for 1.5 hours to react.

[0045] S3. Cool to room temperature, add 120mL of solvent mixed with ethanol and acetone at a volume ratio of 1:2, ...

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Abstract

The invention provides an itaconic acid-aspartic acid binary copolymer with nutrient chelating and growth promoting functions and a preparation method thereof. The preparation method of the bipolymer comprises the following steps: monomers of itaconic acid and aspartic acid are subjected to a copolymerization reaction in the presence of a phosphate buffer solution and an initiator, and the molar ratio of the itaconic acid to the aspartic acid is 1: (0.25-4). As a fertilizer additive, the itaconic acid-aspartic acid binary copolymer not only has a good chelation effect on trace elements and avoids nutrient fixation, but also has the effects of promoting seed germination, promoting seedling growth and development and other growth promoting effects and improving nutrient utilization, and meanwhile, the binary copolymer is easy to biodegrade and has a good application prospect. The application prospect in agricultural production is wide.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to an itaconic acid-aspartic acid binary copolymer with the functions of chelating nutrients and promoting growth and a preparation method thereof. Background technique [0002] Chelating agents are widely used in water-soluble fertilizers. Ethylenediaminetetraacetic acid (EDTA) and hydroxyethylethylenediaminetriacetic acid (HEDTA) are currently commonly used fertilizer chelating agents, which are expensive and have poor biodegradability. pose certain risks to the soil environment. At present, more and more researches go deep into the preparation of new environment-friendly green chelating agent products. Amino acids are the third-generation trace element additives that have developed rapidly in recent years, especially aspartic acid, which has the characteristics of high biological potency, easy absorption, safety and non-toxicity, etc. It can promote seed germination and seed...

Claims

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Application Information

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IPC IPC(8): C08G69/04C08G69/02C05C11/00
CPCC08G69/04C08G69/02C05C11/00
Inventor 陈清祁瑞孙润泽慕康国陈硕
Owner CHINA AGRI UNIV
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