Adsorption method for preparing hydroxyapatite pesticide and slow-release fertilizer compound

A technology of hydroxyapatite and nano-hydroxyapatite, which is applied in fertilizer mixtures, agriculture, fertilization devices, etc., can solve the problems of low drug loading, uneven drug loading, and incomplete release, so as to improve soil and facilitate The effect of continuous production and accelerated release

Inactive Publication Date: 2009-12-02
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention discloses an adsorption method for preparing a slow-release compound of hydroxyapatite pesticide and fertilizer, which solves the problems that the existing slow-release compound of this type is prone to uneven drug loading, low drug loading, and incomplete release

Method used

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  • Adsorption method for preparing hydroxyapatite pesticide and slow-release fertilizer compound
  • Adsorption method for preparing hydroxyapatite pesticide and slow-release fertilizer compound
  • Adsorption method for preparing hydroxyapatite pesticide and slow-release fertilizer compound

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Take 100 mg of hydroxyapatite nano-particle powder, soak in phosphate buffer solution with pH 6.5 for 2 hours, then ultrasonically disperse for 10 minutes, then add 50 mg of abamectin, stir continuously for 2 hours, and centrifuge the reaction solution at 10,000 rpm / min for 15 minutes at room temperature , and the precipitate was dried at room temperature for 48 hours to obtain the abamectin complex, which was stored at 4°C. characterization see figure 1 , figure 2 , SEM photo see image 3 .

Embodiment 2

[0021] Take 100 mg of hydroxyapatite nanoparticle powder, soak it in the phosphate buffer solution with pH 7.0 for 3 hours, and then ultrasonically disperse it for 15 minutes. Dry at room temperature for 36 h, and store the complex at 4°C.

Embodiment 3

[0023] Take 200 mg of hydroxyapatite nanoparticle powder, soak in phosphate buffer solution with pH 7.5 for 4 hours, then ultrasonically disperse for 5 minutes, then add 300 mg of copper sulfate, stir continuously for 3 hours, centrifuge the reaction solution at 12000 rpm / min for 10 minutes at room temperature, and precipitate Dry at room temperature for 48 h, and store the complex at 4°C.

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Abstract

The invention discloses an adsorption method for preparing hydroxyapatite pesticide and slow-release fertilizer compound, which comprises the following steps: soaking a nano hydroxyapatite carrier in phosphate buffer solution, then adding a starting material into the buffer solution and continuously stirring the mixture to form compound solution, finally centrifuging the compound solution to obtain sediment, and drying the sediment to obtain the compound. By using a porous structure of the nano hydroxyapatite self to embed medicaments into an internal grid of the carrier, the burst effect of the medicaments is avoided, the medicinal effect is long, the medicament residue is greatly reduced, and the medicaments are safer. A product obtained by using the nano hydroxyapatite as a pesticide and fertilizer carrier has the advantages of reliable quality, strong stability, safe use and low cost, greatly improves the medicament loading amount and adsorption amount, is easy for continuous production, and has good application prospect.

Description

technical field [0001] The invention relates to a method for preparing a pesticide and fertilizer slow-release compound, in particular discloses an adsorption method for preparing a hydroxyapatite pesticide and fertilizer slow-release compound, and belongs to the technical field of pesticide and fertilizer production. Background technique [0002] At present, in the field of pesticide and fertilizer production technology, the slow and controlled release preparations of chemical fertilizers mainly include organic nitrogen compound method, encapsulation method and carrier method. Among them, the organic nitrogen compound method is rarely used due to reasons such as technology and cost; encapsulation method and Inorganic substances are used as binders to connect the core to the shell, but this method mostly falls off due to the action of water in the soil, and the slow-release effect is poor; the carrier method uses natural or synthetic polymer materials as carriers , or other ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/08A01N43/90A01N47/36A01N57/14C05G3/00
Inventor 滕利荣高波孟庆繁吴丽艳逯家辉王贞佐王德利郭志华王博
Owner JILIN UNIV
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