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Preparation method of pesticide diuron slow controlled release nanometer composite material

A nanocomposite material, Diuron technology, applied in botany equipment and methods, chemicals for biological control, herbicides and algicides, etc., can solve the effects of drug efficacy, waste of petroleum resources, phytotoxicity, etc. Problems, to achieve the effect of reducing agricultural production costs, avoiding environmental pollution, and good environmental protection effects

Inactive Publication Date: 2013-03-20
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing pesticide formulations in my country are mainly two types: emulsifiable concentrate (EC) and wettable powder (WP). Among them, emulsifiable concentrate (EC) and wettable powder (WP) account for a large proportion, which contains a large amount of organic solvents, causing a large waste of petroleum resources and seriously polluting the environment; WP requirements The quality of the wetting agent is good, if the suspension is not good, it is easy to precipitate, affecting the efficacy or causing injury
In addition, the existing pesticides still have disadvantages such as large amount of use, poor control effect, and narrow control range.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method of pesticide Diuron slow-controlled release nano-composite material, it comprises the following steps:

[0023] 1). Dissolve 1.5g of Diuron in 13.5g of water, then ultrasonically disperse (make the pesticide Diuron disperse to form a suspension) to obtain a suspension containing Diuron; the power of the ultrasonic dispersion is 100W, The frequency of the ultrasonic wave is 60 kHz, and the time is 20 minutes;

[0024] 2). Use the "negative pressure-freeze drying method" to load the solution containing diuron on hydroxyapatite nanoparticles:

[0025] First put 8.5g of hydroxyapatite nanoparticles with a particle size of 150nm in a closed container, pump air to make it in a vacuum state and then seal it, then inject the suspension containing diuron into the container, and the diuron molecule Adsorbed on the surface of the nanoparticle and infiltrated into the hole by negative pressure, after 1min (that is, after reaching equilibrium), freeze-dry (use ...

Embodiment 2

[0033] A preparation method of pesticide Diuron slow-controlled release nano-composite material, it comprises the following steps:

[0034] 1). Dissolve 3.5g of Diuron in 5.25g of water, then ultrasonically disperse (make the pesticide Diuron disperse to form a suspension) to obtain a suspension containing Diuron; the power of the ultrasonic dispersion is 100W, The frequency of the ultrasonic wave is 60 kHz, and the time is 20 minutes;

[0035] 2). Use the "negative pressure-freeze drying method" to load the solution containing diuron on hydroxyapatite nanoparticles:

[0036] First put 7.0g of hydroxyapatite nanoparticles with a particle size of 800nm ​​in an airtight container, pump air to make it in a vacuum state and then seal it, then inject the suspension containing diuron into the container, and the diuron molecules are Adsorbed on the surface of the nanoparticles and infiltrated into the pores through negative pressure, after 7 minutes (that is, after reaching equilibr...

Embodiment 3

[0044] A preparation method of pesticide Diuron slow-controlled release nano-composite material, it comprises the following steps:

[0045] 1). Dissolve 5.5g of Diuron in 22g of water, and then ultrasonically disperse (to disperse the pesticide Diuron to form a suspension) to obtain a suspension containing Diuron; the power of the ultrasonic dispersion is 100W, and the ultrasonic dispersion The frequency is 60 kHz, and the time is 20 minutes;

[0046] 2). Use the "negative pressure-freeze drying method" to load the solution containing diuron on hydroxyapatite nanoparticles:

[0047] First put 4.5g of hydroxyapatite nanoparticles with a particle size of 500nm in a closed container, pump air to make it in a vacuum state and then seal it, then inject the suspension containing diuron into the container, and the diuron molecule Adsorbed on the surface of the nanoparticle and infiltrated into the hole by negative pressure, after 10 minutes (that is, after reaching equilibrium), fre...

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Abstract

The invention relates to a preparation method of a pesticide slow controlled release nanometer composite material, in particular to a preparation method of a pesticide diuron slow controlled release nanometer composite material. The preparation method is characterized by comprising the following steps of: (1) dissolving diuron in water and dispersing by using ultrasound to obtain suspension containing the diuron; (2) loading the solution containing the diuron on hydroxyapatite nanometer granules by adopting a negative pressure and freeze drying method to obtain drug loading hydroxyapatite nanometer granules; (3) mixing and stirring sodium alga acid solution and hydroxyapatite nanometer granule suspension to obtain a sol system; dripping the sol system into a calcium ion cross-linking agent solution by an injector to obtain ion crosslinking gel granules of alginic acid / drug loading hydroxyapatite nanometer granules; washing by using distilled water, and drying in vacuum to obtain the micro-granular pesticide diuron slow controlled release nanometer composite material. The system can control the pesticide to slowly release and improve the pesticide effect. The invention solves the problem of pollution caused by too frequent pesticide use, too great dosage, low utilization rate of medicament, poor effect and medicament loss.

Description

technical field [0001] The invention belongs to the technical field of agricultural medicines, and in particular relates to a preparation method of a nanocomposite material for slow and controlled release of agricultural chemicals. Background technique [0002] Pesticides are widely used in agriculture as insecticides and herbicides, and play an important role in the stable production of food all over the world. Except for a few pesticides with high volatility and high solubility in water, which can be used directly, most of them must be processed into preparations before they can be used. The existing pesticide formulations in my country are mainly two types: emulsifiable concentrate (EC) and wettable powder (WP). Among them, emulsifiable concentrate (EC) and wettable powder (WP) account for a large proportion, which contains a large amount of organic solvents, causing a large waste of petroleum resources and seriously polluting the environment; WP requirements The quality ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N25/00A01N47/30A01P13/00
Inventor 黄进汪雪君任红轩余家会原弘殷以华
Owner WUHAN UNIV OF TECH
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