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Compound slow-release algae-killing microcapsule and preparation method thereof

A slow-release algae-killing microcapsule and microcapsule technology, which is applied in the fields of botanical equipment and methods, herbicides and algicides, and chemicals for biological control, etc. To solve problems such as poor efficacy, to achieve the effects of good biocompatibility and degradability, wide sterilization spectrum and wide source

Active Publication Date: 2020-12-25
ZHEJIANG FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using natural polymer materials as capsule wall materials has the advantages of wide source of raw materials, low price, and good environmental compatibility, but there are problems such as difficult preparation and insufficient mechanical properties of the prepared microcapsules.
The use of semi-synthetic polymer materials as the capsule wall has disadvantages such as easy hydrolysis and poor environmental adaptability.
However, fully synthetic polymer materials are used as the capsule wall. Although they have good mechanical properties and stable properties, they are expensive, cannot be degraded independently, and have great harm to the environment.
And most of the sustained-release microcapsules use a single drug as the capsule core, which has certain limitations in the use process, and the drug effect is relatively poor.

Method used

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  • Compound slow-release algae-killing microcapsule and preparation method thereof
  • Compound slow-release algae-killing microcapsule and preparation method thereof
  • Compound slow-release algae-killing microcapsule and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] (1) Preparation of compound slow-release algicide

[0043]Take 4g of prochloraz and 1g of imazalil in a 30mL glass sample bottle, heat in an oven at 50°C for 10 minutes to a fluid state, and mix the two fully to form prochloraz-imazalil EC, that is, to obtain prochloraz and imazalil compound algicide.

[0044] (2) Preparation of polylactic acid-lysine interpenetrating network polymer

[0045] (2.1) Dissolve 5.5 g of lysine in 40 mL of deionized water, add 6 g of 37% formaldehyde solution, adjust the pH of the solution to 8 with 5% NaOH, and stir at 90° C. for 3 h to obtain a white precipitate.

[0046] (2.2) Dissolve 3g of polylactic acid in 130mL of dichloromethane, add 3g of maleic anhydride and 0.15g of benzoyl peroxide in sequence, stir to make it fully dissolve, reflux at room temperature for 20h, then add 120mL of tetrahydrofuran dropwise, A yellow precipitate formed. Then the pH of the solution was adjusted to 8.5 with 5% NaOH, and then 15 mL of pentanediol wa...

Embodiment 2

[0051] (1) Preparation of compound slow-release algicide

[0052] Take 3.5g of prochloraz and 1g of imazalil in a 30mL glass sample bottle, heat it in an oven at 50°C for 10 minutes to a fluid state, and mix the two fully to form prochloraz-imazalil EC, that is, prochloraz and imazalil are obtained. Compound algicide of medazole.

[0053] (2) Preparation of polylactic acid-lysine interpenetrating network polymer

[0054] (2.1) Dissolve 6 g of lysine in 60 mL of deionized water, add 6 g of 35% formaldehyde solution, adjust the pH of the solution to 7.5 with 5% NaOH, and stir for 3.5 h at 85° C. to obtain a white precipitate.

[0055] (2.2) Dissolve 3g of polylactic acid in 135mL of dichloromethane, add 2.0g of maleic anhydride and 0.09g of benzoyl peroxide in turn, stir to make it fully dissolve, reflux at room temperature for 18h, then add 90mL of tetrahydrofuran dropwise , a yellow precipitate formed. Then the pH of the solution was adjusted to 9 with 5% NaOH, and then 12 ...

Embodiment 3

[0060] (1) Preparation of compound slow-release algicide

[0061] Take 4.5g of prochloraz and 1g of imazalil in a 30mL glass sample bottle, heat in an oven at 50°C for 10 min to a fluid state, and mix the two fully to form prochloraz-imazalil EC, that is, prochloraz and imazalil Compound algicide of medazole.

[0062] (2) Preparation of polylactic acid-lysine interpenetrating network polymer

[0063] (2.1) Dissolve 5 g of lysine in 40 mL of deionized water, add 6 g of 40% formaldehyde solution, adjust the pH of the solution to 7 with 5% NaOH, and stir at 95° C. for 3 h to obtain a white precipitate.

[0064] (2.2) Dissolve 3g of polylactic acid in 140mL of dichloromethane, add 2.5g of maleic anhydride and 0.12g of benzoyl peroxide in turn, stir to dissolve it fully, reflux at room temperature for 20h, then add dropwise 150mL of tetrahydrofuran , a yellow precipitate was formed, then the pH of the solution was adjusted to 9.5 with 5% NaOH, and then 13 mL of pentanediol was ad...

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Abstract

The invention relates to the technical field of microcapsules, aims to solve the problem of prevention and treatment of torreya grandis green alga diseases, and provides a compound slow-release alga-killing microcapsule and a preparation method thereof. According to the compound slow-release alga-killing microcapsule, a polylactic acid-lysine interpenetrating network polymer istaken as a capsule wall, an alga-killing agent formed by combining prochloraz and imazalil is adopted as a capsule core, which is of great significance in prolonging the service cycle of the algicide, improving the stability of the chemical agent, protecting the environment and the like.

Description

technical field [0001] The invention relates to the technical field of microcapsules, in particular to a preparation method of compound slow-release algae-killing microcapsules. Background technique [0002] Torreya torreya is a rare economic tree species in my country with high nutritional value and medicinal value. It is mainly distributed in Zhejiang. But in recent years, Torreya torreya disease breaks out constantly, causes a large amount of economic losses, has seriously affected the healthy development of this industry. Among them, the green algae disease is the most serious hazard, and it is urgent to carry out the research and development of algicides against the green algae disease of Torreya torreya, so as to provide technical support for the healthy development of Torreya torreya industry. Today, lime sulfur is mainly used to prevent and control Torreya Chlorella. However, lime sulfur has many problems such as large residue, short drug effect, and great harm to t...

Claims

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Application Information

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IPC IPC(8): A01N25/28A01N47/38A01N43/50A01P13/00A01P3/00A01P1/00
CPCA01N25/28A01N47/38A01N43/50
Inventor 郭明吴燕琳叶碧欢陈友吾王义平胡海龙王瑞李锦云吴荣晖胡智燕
Owner ZHEJIANG FORESTRY UNIVERSITY