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Nano composite pesticides new formulation and preparation method thereof

A nano-composite, new formulation technology, applied in the fields of botanical equipment and methods, biocides, animal repellents, etc., can solve the problem of uncommon application of pesticides, and achieve enhanced antibacterial and insecticidal effects, increased safety, and pesticide mitigation. release effect

Inactive Publication Date: 2008-10-22
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Effervescent tablets have been used as a dosage form in medicine for more than a thousand years, but they are not commonly used in pesticides

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Embodiment 1: raw material: sodium laurate, nanometer TiO 2 , chitosan and pesticide technical.

[0074] According to the following steps to prepare the nanopesticide new dosage form of the present invention:

[0075] (1) Preparation of modified nano-TiO 2 Powder: Dissolve 0.25g of sodium laurate into 20mL of water to prepare a modifier and set aside; weigh 1.5g of nano-TiO 2 Disperse in 150mL water, adjust pH to 5, temperature 40°C, add 20mL modifier, stir at constant temperature 40°C for 30min, filter, wash, and dry to obtain modified nano-TiO 2 Powder.

[0076] (2) Preparation of nanocomposite pesticides: take 0.025g modified nano TiO 2 Disperse in 100mL of 0.60% acetic acid aqueous solution, stir for 20 to 30 minutes, then add 2.0g of chitosan, and magnetically stir for 20 to 30 minutes to fully dissolve it to obtain nano TiO 2 Chitosan composite film solution, add 0.03mL of the original drug into the solution, stir to fully dissolve the original drug, adjust t...

Embodiment 2

[0078] Embodiment 2: raw material: sodium laurate, nanometer TiO 2 , chitosan and pesticide technical.

[0079] According to the following steps to prepare the nanopesticide new dosage form of the present invention:

[0080] (1) Preparation of modified nano-TiO 2 Powder: Dissolve 0.3g of sodium laurate into 20mL of water to prepare a modifier and set aside; weigh 2g of nano-TiO 2 Disperse in 100mL water, adjust pH to 5, temperature 40°C, add 20mL modifier, stir at constant temperature 40°C for 30min, filter, wash, and dry to obtain modified nano-TiO 2 Powder.

[0081] (2) Preparation of nanocomposite pesticides: take 0.03g modified nano TiO 2 Disperse in 100mL of 0.60% acetic acid aqueous solution, stir evenly, then add 3g of chitosan, and magnetically stir to make it fully dissolved to obtain nano-TiO 2 Chitosan composite film solution, add 0.033mL of the original drug into the solution, stir to fully dissolve the original drug, adjust the pH value to 5.6, continue stirr...

Embodiment 3

[0083] Embodiment 3: raw material: sodium laurate, nanometer TiO 2 , chitosan and pesticide technical.

[0084] According to the following steps to prepare the nanopesticide new dosage form of the present invention:

[0085] (1) Preparation of modified nano-TiO 2 Powder: Take 0.2g of sodium laurate and dissolve it in 20mL of water to prepare a modifier and set it aside; weigh 1g of nano-TiO 2 Disperse in 200mL water, adjust pH to 5, temperature 40°C, add 20mL modifier, stir at constant temperature 40°C for 30min, filter, wash, and dry to obtain modified nano-TiO 2 Powder.

[0086] (2) Preparation of nanocomposite pesticides: take 0.02g modified nano TiO 2Disperse in 100mL of 0.60% acetic acid aqueous solution, stir evenly, then add 1g of chitosan, and magnetically stir to fully dissolve it to obtain nano-TiO 2 Chitosan composite film solution, add 0.025mL of the original drug into the solution, stir to fully dissolve the original drug, adjust the pH value to 5.6, continue...

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Abstract

The invention discloses a new dosage form of nanometer compound pesticide and a preparation method thereof, which is prepared by adopting modified nanometer TiO2, chitosan and technical product of pesticides as the raw materials, wherein, the modified nanometer TiO2 has improved mechanical property which is modified through sodium laurate. By utilizing the property of film build of chitosan, the chitosan and the technical product of pesticides react fully, a layer of film is formed on the surface of a spraying object, the film can reduce loss of liquid medicine, ensure more pesticide to be attached on crops, facilitate penetration of systemic pesticide and increase the safety for the operators of spraying and environment; the added modified nanometer TiO2 helps the film have certain intension and tenacity, thus achieving slow release and long effect of pesticide; meanwhile, by utilizing the antibacterial property of chitosan and nanometer TiO2, the effects of antibacterial property and getting rid of pests of pesticide are increased. The nanometer compound pesticide is a new dosage form of pesticide with the characters of long effect, safety, innocuity, economy and convenience.

Description

technical field [0001] The invention belongs to the technical field of pesticide pharmacy, and in particular relates to a nano-TiO 2 A new dosage form of chitosan compound pesticide and its preparation method. Background technique [0002] Pesticides are an important means for humans to prevent and control agricultural and forestry diseases, insects, grasses, and rodents, as well as storage diseases, insects, rodents, and vector pests. Now they have been widely used in the whole process of agricultural production from prenatal to postnatal. material. 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 a certain form of preparation before they can be used. Different formulations can endow the active pesticide with different stable forms to meet different applications. [0003] At present, pesticides can be divided into three categories according to their forms: solid preparations, li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/08A01N25/12
Inventor 王明力刘晶沈丹陈汝财陶希芹
Owner GUIZHOU UNIV
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