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A kind of preparation method of quaternary composite nanometer controlled release system

A nano-system technology, applied in the field of preparation of nano-pesticide controlled release agent, can solve the problems of reduced efficiency, weak interaction, low effective utilization rate, etc., and achieves the effects of convenient operation, simple preparation process and less harm

Active Publication Date: 2022-07-12
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the effective utilization rate of traditional pesticide preparations is low because their release is not controlled by humans, and because of their weak interaction with plant leaves, they are easily affected by factors such as rain erosion, resulting in reduced efficiency.

Method used

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  • A kind of preparation method of quaternary composite nanometer controlled release system
  • A kind of preparation method of quaternary composite nanometer controlled release system
  • A kind of preparation method of quaternary composite nanometer controlled release system

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Dissolve 500 mg of graphene oxide powder with an average particle size of 15 nm in 100 mL of distilled water, ultrasonically disperse, then add 500 mg of dopamine monomer, react at room temperature (25 ° C) for 30 min, add ammonia water to adjust pH to 7, and stir at a speed of 500 rmp 12h, then add 100mL of acetamiprid ethanol solution containing 20mg / mL, use a high-speed homogenizer to stir at a high speed of 800rpm for 30min, then centrifugally wash, take all the solids and disperse them in 100mL of water to obtain 800mg of 2.0% acetamiprid nano-controlled release (m / v, wherein the content of acetamiprid is 20 mg / mL), wherein the content of graphene oxide is 0.5% (m / v, g / mL). Then take 160 mg of acetamiprid nano-controlled release agent into the reaction kettle, react at 180 ° C for 8 hours, and the formed fluorescent quantum dots are added to the acetamiprid nano-controlled release agent and mixed to form a quaternary composite nano-pesticide control agent. release ...

Embodiment 2

[0032]Dissolve 750mg of graphene oxide powder with an average particle size of 20nm in 100mL of distilled water, ultrasonically disperse, then add 750mg of dopamine monomer, and react at room temperature (25°C) for 30min, add ammonia water to adjust pH to 7, and stir at a speed of 500rmp 12h, then add 100mL of acetamiprid ethanol solution containing 15mg / mL, use a high-speed homogenizer to stir at a high speed of 800rpm for 30min, then centrifuge and wash, take all the solids and disperse them in 100mL of water to obtain 1200mg of 1.5% acetamiprid nano-controlled release (m / v, wherein the content of acetamiprid is 15 mg / mL), wherein the content of graphene oxide is 0.75% (m / v, g / mL). Then take 300mg of acetamiprid nano-controlled release agent into the reaction kettle, react at 160 ° C for 6 hours, and the formed fluorescent quantum dots are added to the acetamiprid nano-controlled release agent and mixed to form a quaternary composite nano-pesticide control agent. release age...

Embodiment 3

[0034] Dissolve 1250 mg of graphene oxide powder with an average particle size of 25 nm in 100 mL of distilled water, ultrasonically disperse, then add 1250 mg of dopamine monomer, react at room temperature (25 ° C) for 30 min, add ammonia water to adjust the pH to 7.5, and stir at a speed of 500 rmp 12h, then add 100mL of acetamiprid ethanol solution containing 5mg / mL, use a high-speed homogenizer to stir at a high speed of 600rpm for 10min, then centrifugally wash, take all the solids and disperse them in 100mL of water to obtain 2000mg of 0.5% acetamiprid nano-controlled release (m / v, wherein the content of acetamiprid is 5 mg / mL), wherein the content of graphene oxide is 1.25% (m / v, g / mL). Then take 400 mg of acetamiprid nano-controlled release agent into the reaction kettle, react at 200 ° C for 10 hours, and the formed fluorescent quantum dots are added to the acetamiprid nano-controlled release agent and mixed to form a quaternary composite nano-pesticide control agent. ...

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Abstract

The invention discloses a preparation method of a quaternary composite nanometer controlled release system. The preparation comprises: adding dopamine monomer into a graphene oxide aqueous solution, centrifuging after the reaction, washing to obtain a polydopamine / graphene oxide aqueous solution, and then Take acetamiprid dissolved in ethanol and add it to the polydopamine / small size graphene oxide aqueous solution, stir, take part of it after the reaction and put it into the reactor to prepare fluorescent quantum dots, and then add the fluorescent quantum dots into the original system to form four. Meta-composite nano-pesticide controlled release agent. The invention has the advantages of simple preparation process, convenient operation, environmental protection and controllable sustained release. The nanosystem shows blue fluorescence after adding quantum dots, which can be used for labeling and tracking in plants; it has a controlled release function, and can release acetamiprid continuously and efficiently; it has no toxic organic solvents and additives, and is green and safe.

Description

technical field [0001] The invention belongs to a preparation method of a nanometer pesticide controlled release agent for plant protection, in particular to a preparation method of a novel quaternary nanometer composite pesticide controlled release agent based on polydopamine / small-size graphene oxide composite material as a controlled release carrier. Background technique [0002] As an irreplaceable means of production, pesticides play an indispensable role in preventing and controlling crop diseases, pests and weeds, regulating crop growth, and ensuring crop yield and quality. At present, there are many problems in the field of pesticide formulations, such as simple formulation structure, few new formulations, and unstable quality. The main pesticide preparations produced are still traditional preparations such as emulsifiable concentrate, which not only have low use efficiency and poor stability, but also pose a great threat to the environment. Therefore, it has become...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N47/40A01N25/10A01P7/04C09K11/06C09K11/65B82Y20/00B82Y30/00B82Y40/00G01N21/64
CPCA01N47/40A01N25/10C09K11/06C09K11/65C09K11/0883B82Y20/00B82Y30/00B82Y40/00G01N21/6428G01N21/6486G01N2021/6439Y02A50/30
Inventor 周宁琳王玉丽沈健李东辉楚晓红孙宝宏冯文立石绍泽徐旺宋秋娴
Owner NANJING NORMAL UNIVERSITY