Temperature-sensitive wall material as well as microcapsule preparation and preparation method thereof

A temperature-sensitive, microcapsule technology, applied in botany equipment and methods, biocides, animal repellents, etc., can solve the problems of easy aggregation, single types of wrapped drugs, and difficult soil degradation.

Inactive Publication Date: 2020-06-05
SUZHOU FENGBEI BIOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new technology allows for precise control over how much medicine will work at specific temperatures within crops or plants without affecting their healthy flora. It also makes it possible to create complex compositions containing multiple medicines loaded into tiny capsules made from this special substance. These small particles have certain properties such as stability when exposed to varying degrees of heat but they don't harm any others inside them.

Problems solved by technology

This patents discusses how adding heat control functions or releasing characteristics into certain substances like pesticidal agents makes them easier to use with existing methods such as sprayers that require liquid solubilization techniques. Additionally, modifying these ingredients may make it difficult to produce safe products without harmful effects on humans and animals.

Method used

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  • Temperature-sensitive wall material as well as microcapsule preparation and preparation method thereof
  • Temperature-sensitive wall material as well as microcapsule preparation and preparation method thereof
  • Temperature-sensitive wall material as well as microcapsule preparation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A temperature-sensitive microcapsule for cotton field insecticide, which consists of dimethoate original drug, lambda-cyhalothrin original drug, phoxim original drug, three temperature-sensitive wall materials, organic solvent, emulsifier, thickener and detoxifying agent Made of ionized water;

[0035] The preparation method of temperature-sensitive microcapsules for insecticidal cotton field comprises the following steps:

[0036] 1) Preparation of temperature-sensitive wall material;

[0037] Add 2% glacial acetic acid solution to DMSO to help dissolve, mix well and remove water for later use, stir methylcellulose in DMSO mixture until fully dissolved and reflux at 60°C, add stearic acid to stir and disperse during the process, add benzyl after cooling down Exhaust air and inflate nitrogen with triethylammonium chloride, react at constant temperature for 12 hours, adjust the amount of stearic acid to prepare a temperature-sensitive microcapsule wall material, methyl ...

Embodiment 2

[0057] A temperature-sensitive microcapsule for paddy field weeding, made of butachlor technical material, propanil technical material, saflufenacil technical material, three temperature-sensitive wall materials, organic solvent, emulsifier, thickener and deionized water :

[0058] The preparation method of the temperature-sensitive microcapsules for weeding paddy fields comprises the following steps:

[0059] 1) Preparation of temperature-sensitive wall material;

[0060] Put the guar gum in 1% sodium hydroxide solution for pre-alkalization, stir evenly for 3 hours to disperse for later use, disperse the hydroxybutyl chitosan in the methanol-deionized water medium, mix the guar gum and hydroxybutyl chitosan , keep the temperature at 30°C, adjust the pH of the mixed system to neutral, control the amount of butyl chitosan to prepare guar gum-hydroxybutyl chitosan, and the LCST is 30°C;

[0061] Add poly-N-isopropylacrylamide monomer into DMF, use sodium bisulfite as redox age...

Embodiment 3

[0081] A temperature-sensitive microcapsule for soybean field agriculture, which is made of clethodim technical product, acetrafen technical drug, acetochlor technical drug, three temperature-sensitive wall materials, emulsifier, thickener and deionized water;

[0082] The preparation method of the temperature-sensitive microcapsules for soybean field agriculture comprises the following steps:

[0083] 1) Preparation of temperature-sensitive wall material;

[0084] Stir starch octenyl succinate in acetic acid to form a solution and disperse for 2 hours, dissolve disodium glycerophosphate in deionized water, slowly drop into starch octenyl succinate solution and mix evenly, adjust the addition ratio to obtain octenyl succinate The microcapsule wall material of acid starch ester / disodium glycerophosphate composite system LCST about 25°C temperature-sensitive;

[0085] Weigh sodium alginate and stir to make a solution, slowly add galactose-modified xyloglucan temperature-sensiti...

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Abstract

The invention discloses a temperature-sensitive wall material. The temperature-sensitive wall material comprises a temperature-sensitive material modified polymer wall material, wherein the temperature-sensitive material is polyvinylpyrrolidone, glycerophosphate, stearic acid, galactose-removed xyloglucan or gelatin-chitosan, poly(N-isopropylacrylamide) and hydroxybutyl chitosan. The temperature-sensitive wall material releases drugs at different temperatures, the drug release time is flexibly controlled, the phytotoxicity is reduced, and the drug action time is prolonged. The temperature-sensitive wall material can be applied to whole-course pesticide application protection of the growth cycle of crops, the chemical application frequency is reduced, and the crop management efficiency is improved. The invention also provides a corresponding microcapsule and a preparation method.

Description

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Claims

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Application Information

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Owner SUZHOU FENGBEI BIOTECH CO LTD
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