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A kind of slow-release algae-killing microcapsule with bimolecular structure and preparation method thereof

A molecular structure and microcapsule technology, applied in the field of slow-release algae killing microcapsules and their preparation, can solve problems such as threatening human health, interfering with algae growth, heavy metal pollution, etc. short effect

Active Publication Date: 2021-01-12
ZHEJIANG FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of algicide contains halogenated organic matter in water, which produces carcinogens and threatens human health.
Flocculation-type algicides are mostly heavy metal salt solutions. On the one hand, metal ions inhibit the normal metabolism of algae and interfere with the growth of algae; Pollution

Method used

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  • A kind of slow-release algae-killing microcapsule with bimolecular structure and preparation method thereof
  • A kind of slow-release algae-killing microcapsule with bimolecular structure and preparation method thereof
  • A kind of slow-release algae-killing microcapsule with bimolecular structure and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) First, weigh 15g of polylactic acid, add it into a three-necked flask with a stirrer, then add 100mL of toluene to dissolve it and put it in a constant temperature water bath, add 5g of maleic anhydride and 0.15g of initiator after heating to 95°C ( 2,5-dimethyl-2,5-di-tert-butyl-peroxy-hexane), reacted at 95°C for 2.5h under constant temperature stirring, precipitated with methanol, and washed repeatedly with methanol to remove the remaining maleic anhydride Post drying to obtain maleic anhydride graft modified polylactic acid (MPLA). Then add 5 mL of THF solution containing 9 g of ethylenediamine to a three-necked flask equipped with a stirrer and a thermometer; completely dissolve 4.5 g of MPLA in 50 mL of THF solution, drop into the three-necked flask under stirring, and control the temperature of the reaction system at 19°C . After the dropwise addition is completed, keep warm for ten minutes, then raise the temperature to 25°C and react for 30 minutes, stir a...

Embodiment 2

[0056] (1) First, weigh 20g of polylactic acid, add it to a three-necked flask with a stirrer, then add 120mL of toluene to dissolve it, put it into a constant temperature water bath, heat it to 100°C, add 8g of maleic anhydride and 0.2g of initiator ( 2,5-dimethyl-2,5-di-tert-butyl-peroxy-hexane), reacted at 100°C for 2 hours with stirring, then precipitated with methanol, washed repeatedly with methanol to remove the remaining maleic anhydride, and then dried , to obtain maleic anhydride graft modified polylactic acid (MPLA). Then add 5mL THF solution containing 10g ethylenediamine to a three-necked flask equipped with a stirrer and a thermometer; completely dissolve 4g MPLA in 70mL THF solution, drop into the three-necked flask under stirring, and control the temperature of the reaction system at 18°C. After the dropwise addition is completed, keep warm for 15 minutes, then raise the temperature to room temperature (20°C) and react for 60 minutes, stir and dissolve the reac...

Embodiment 3

[0065] (1) First, weigh 15g of polylactic acid, add it into a three-necked flask with a stirrer, add 90mL of toluene to dissolve it, put it into a constant temperature water bath, add 5g of maleic anhydride and 0.17g of initiator after heating to 90°C ( 2,5-dimethyl-2,5-di-tert-butyl-peroxy-hexane), reacted at a constant temperature of 90°C for 3h while stirring. The solution after the reaction is completed is precipitated with methanol, washed repeatedly with methanol to remove the remaining maleic anhydride, and then dried to obtain maleic anhydride graft-modified polylactic acid (MPLA). Then add 5mL THF solution containing 9g of ethylenediamine to a three-necked flask equipped with a stirrer and a thermometer; completely dissolve 3.75g MPLA in 60mL THF solution, drop into the three-necked flask under stirring, and control the temperature of the reaction system for 17 ℃. After the dropwise addition was completed and kept warm for 15 minutes, the temperature was raised to ro...

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Abstract

The invention relates to the technical field of microcapsules. In order to solve the problems in control of green torreya grandis algae at present, the invention provides a slow-release alga-removingmicrocapsule adopting a bimolecular structure and a preparation method thereof. A modified polylactic acid bio-based material is used as a capsule wall, a composite non-toxic and high-efficiency photosensitive catalytic material uses Ce-doped micro-nano ZnO composite sterilizing and alga-removing material as a core material, and a slow-release nano-molecular capsule is formed through self-assembly. The nanocapsule combines advantages such as physical alga removal, chemical alga removal and a slow-release effect of an intelligent material, is a novel environment-friendly algicide and a novel high-efficiency and low-residue antibacterial pesticide dosage form, and has a very important significance in prolonging the lasting period of the alga-removing effect, reducing the application amount of a high-toxic algaecide, efficiently utilizing a pesticide and protecting the environment.

Description

technical field [0001] The invention relates to the technical field of microcapsules, in particular to a slow-release algae-killing microcapsule with a bimolecular structure and a preparation method thereof. Background technique [0002] Torreya grandis (Torreya grandis) is a characteristic forestry industry in Zhejiang Province. Torreya grandis has great edible and medicinal value, and is a famous dried fruit in Zhejiang Province. The high-efficiency and economic benefits of the Torreya torreya industry make it the most closely related forestry industry in our province to increase the income of forest farmers and have an important strategic position in the development of economic forests in Zhejiang. However, the frequency of outbreaks of torreya torreya diseases and insect pests has increased year by year, and the economic losses have continued to increase. Pests and diseases have become the main bottleneck restricting the healthy development of the torreya industry. It i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N25/28A01N59/06A01N59/16A01P13/00A01P3/00B01J13/12
CPCY02A50/30
Inventor 郭明王珏王瑞郑轶璐吴荣晖
Owner ZHEJIANG FORESTRY UNIVERSITY
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