Marine organism polysaccharide Schiff base derivative, preparation method thereof, and application thereof as agricultural bactericide

A technology of marine biological polysaccharides and Schiff bases, applied in the direction of chemicals, fungicides, and biocides for biological control, can solve problems such as environmental pollution, ecological balance damage, and unreasonable use, and expand the application field , Improve the effect of antibacterial activity

Active Publication Date: 2016-01-13
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the excessive and unreasonable use of chemical pesticides has brought about a series of problems such as the toxicity of pesticide residues, the increase in the resistance (resistance) of diseases and insect pests, the...

Method used

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  • Marine organism polysaccharide Schiff base derivative, preparation method thereof, and application thereof as agricultural bactericide
  • Marine organism polysaccharide Schiff base derivative, preparation method thereof, and application thereof as agricultural bactericide
  • Marine organism polysaccharide Schiff base derivative, preparation method thereof, and application thereof as agricultural bactericide

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation of embodiment 1 derivative 1

[0033] Add 2.5 grams of 4-amino-3-methylbenzoic acid and 1.66 grams of acetylacetone into 70 mL of absolute ethanol, react at 60°C for 12 hours, rotate the reactants, wash with cold ethanol, and dry at 60°C to obtain a single quarter Amine ligand.

[0034] 0.5 grams of chitosan with a molecular weight of 1.3 million was added to 20 mL of absolute ethanol and 25 mL of water, and 0.5 mL of acetic acid was added dropwise under stirring; 2.0 grams of monoquaternary ammonium ligands were added to 50 mL of absolute ethanol, and Add it to the reaction system and react at 60°C for 12 hours; add 2.5 grams of chloroacetic acid to 10mL of absolute ethanol, add dropwise to the reaction system, react at 60°C for 6 hours, cool to room temperature, add absolute ethanol to precipitate, and the precipitate is pumped filtered, washed with absolute ethanol, and dried at 60° C. to obtain a light yellow powder, which is the O-carboxymethyl chi...

Embodiment 2

[0036] The preparation of embodiment 2 derivative 2

[0037] Add 2.5 grams of 4-amino-2-methylbenzoic acid and 1.66 grams of acetylacetone into 70 mL of absolute ethanol, react at 60°C for 12 hours, rotate the reactants, wash with cold ethanol, and dry at 60°C to obtain a single quaternary Amine ligand.

[0038]0.5 grams of chitosan with a molecular weight of 1.3 million was added to 20 mL of absolute ethanol and 25 mL of water, and 0.5 mL of acetic acid was added dropwise under stirring; 2.0 grams of monoquaternary ammonium ligands were added to 50 mL of absolute ethanol, and Add it to the reaction system and react at 60°C for 12 hours; add 2.5 grams of chloroacetic acid to 10mL of absolute ethanol, add dropwise to the reaction system, react at 60°C for 6 hours, cool to room temperature, add absolute ethanol to precipitate, and the precipitate is pumped filtered, washed with absolute ethanol, and dried at 60° C. to obtain a light yellow powder, which is the O-carboxymethyl c...

Embodiment 3

[0040] The preparation of embodiment 3 derivative 3

[0041] Add 2.5 grams of 3-amino-2-methylbenzoic acid and 1.66 grams of acetylacetone to 70 mL of absolute ethanol, react at 60°C for 12 hours, spin evaporate the reactants, wash with cold ethanol, and dry at 60°C to obtain a single quaternary Amine ligand.

[0042] 0.5 grams of chitosan with a molecular weight of 1.3 million was added to 20 mL of absolute ethanol and 25 mL of water, and 0.5 mL of acetic acid was added dropwise under stirring; 2.0 grams of monoquaternary ammonium ligands were added to 50 mL of absolute ethanol, and Add it to the reaction system and react at 60°C for 12 hours; add 2.5 grams of chloroacetic acid to 10mL of absolute ethanol, add dropwise to the reaction system, react at 60°C for 6 hours, cool to room temperature, add absolute ethanol to precipitate, and the precipitate is pumped filtered, washed with absolute ethanol, and dried at 60° C. to obtain a light yellow powder, which is the O-carboxym...

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Abstract

The invention belongs to a marine chemical engineering technology, and concretely relates to a marine organism polysaccharide Schiff base derivative, a preparation method thereof, and an application thereof as an agricultural bactericide. The polysaccharide Schiff base derivative is an O-carboxymethyl chitosan aminobenzoic acid Schiff base derivative, and is represented by general formula I; and in the formula I, X is a carboxyl and methyl co-substituted phenyl group, a carboxyl and halogen co-substituted phenyl group or a carboxylphenyl group, and n is 1000-8000. The O-carboxymethyl chitosan aminobenzoic acid Schiff base derivative has good dissolvability and can be dissolved in various solvents, so the application field of the derivative is enlarged, the derivative has bacteriostatic activity and metal ion adsorption function, can kill agricultural pathogenic bacteria, and also can remove copper ions and other heavy metal ions enriched in cultivated land. The derivative has potential application values in the field of pesticides.

Description

technical field [0001] The invention belongs to marine chemical engineering technology, and specifically relates to a novel marine biological polysaccharide Schiff base derivative and its preparation and application as an agricultural fungicide. Background technique [0002] Chemical pesticides have made important contributions to reducing agricultural pests and diseases and ensuring my country's grain production. However, the excessive and unreasonable use of chemical pesticides has brought about a series of problems such as the toxicity of pesticide residues, the increase in the resistance (resistance) of diseases and insect pests, the occurrence of secondary pests, environmental pollution and the destruction of ecological balance, which seriously threatens the safety and security of agricultural products in our country. Agricultural ecological environment safety. Therefore, under the premise of stabilizing and increasing production, it is necessary to vigorously develop ...

Claims

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Application Information

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IPC IPC(8): C08B37/08A01N43/16A01P1/00A01P3/00
Inventor 李鹏程刘卫翔秦玉坤刘松邢荣娥于华华李克成岳洋刘宏
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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