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Pesticide carrier based on calcium carbonate, and preparation method thereof

A calcium carbonate and pesticide technology, applied in the agricultural field, can solve the problems of pesticide volatilization or decomposition, pesticide slipping, volatilization, etc., and achieves the effects of good biocompatibility, simple preparation method and mild reaction conditions

Inactive Publication Date: 2018-02-09
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two main reasons for the waste and loss of pesticides: first, after exposure to the sun and rain, part of the pesticides will volatilize or be decomposed and cannot function; Cannot form effective spread and stay, resulting in most pesticides slipping off or volatilizing quickly after spraying

Method used

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  • Pesticide carrier based on calcium carbonate, and preparation method thereof
  • Pesticide carrier based on calcium carbonate, and preparation method thereof
  • Pesticide carrier based on calcium carbonate, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of pesticide carrier based on calcium carbonate and polydopamine:

[0039] Mix 10mL of calcium chloride solution (0.1M) and 10mL of sodium carbonate solution (0.1M), rotate at 650rpm, react at room temperature for 30s, let stand and mature for 20min, then centrifuge at 4000g for 10min, remove the supernatant to obtain calcium carbonate microspheres;

[0040] The obtained calcium carbonate microspheres were dispersed in 10 mL of abamectin aqueous solution, the concentration was 1 mg / mL, stirred and reacted at room temperature for 4 h, and centrifuged with ethanol and water to obtain the pesticide-loaded calcium carbonate carrier;

[0041] Disperse 10 mg of the drug-loaded calcium carbonate in 10 mL of Tris-HCl buffer solution (10 mM), the pH of the system is 8.5, add 5 mg of dopamine hydrochloride, react at room temperature for 6 hours, then centrifuge and wash with water to obtain a polydopamine-based product based on calcium carbonate and polydopamine. pest...

Embodiment 2

[0043] In this example, hymexazol was used as the active ingredient of the pesticide.

[0044] In the step of loading the pesticide active ingredient, the obtained calcium carbonate microspheres are dispersed in 10 mL of hymexazol ethanol solution (concentration is 2 mg / mL), and a pesticide-loaded calcium carbonate carrier can also be prepared.

[0045] Other is operated with embodiment 1.

Embodiment 3

[0047] Preparation of pesticide carrier based on calcium carbonate and polydopamine:

[0048] Mix 10mL of calcium chloride solution (0.33M) and 10mL of sodium carbonate solution (0.33M), rotate at 650rpm, react at room temperature for 30s, let stand and mature for 20min, then centrifuge at 4000g for 10min, remove the supernatant to obtain calcium carbonate microspheres;

[0049] Disperse the calcium carbonate microspheres in the ethanol solution of 10mL abamectin, the concentration is 1mg / mL, stir and react at room temperature for 40min, and centrifuge washing with ethanol and water to obtain the calcium carbonate carrier of the loaded pesticide;

[0050] The obtained drug-loaded calcium carbonate 10mg was dispersed in 10mL Tris-HCl buffer solution (10mM), the pH value of the system was 8.5, 5mg of dopamine hydrochloride was added, reacted at room temperature for 6h, then centrifuged and washed with water to obtain the calcium carbonate-based and poly Pesticide-loaded particle...

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Abstract

The invention provides a pesticide carrier based on calcium carbonate. The pesticide carrier based on calcium carbonate comprises calcium carbonate micro-nanospheres with a particle size ranging from50 to 6000nm, and dopamine coating layers; the surfaces of the calcium carbonate micro-nanospheres are loaded with pesticide active components; and the calcium carbonate micro-nanospheres are coated by the dopamine coating layers. The invention also provides a preparation method and applications of the pesticide carrier based on calcium carbonate. According to the pesticide carrier based on calcium carbonate, under effective drug loading conditions, adhesion of drug-loaded microspheres at target parts is improved; loss of pesticide in fertilization process caused by drug liquid falling is reduced; calcium carbonate and polydopamine are excellent in biological compatibility and extremely low in toxicity and side effect, so that the pesticide carrier is friendly to non-target organisms; thepreparation method is simple; and reaction conditions are mild.

Description

technical field [0001] The invention belongs to the field of agriculture, and in particular relates to a calcium carbonate-based pesticide carrier and a preparation method thereof. Background technique [0002] The loss of pesticides during use has always been an important reason for the low utilization rate of pesticides. According to statistics, only 20-30% of applied pesticides stay on the target, and the remaining 70-80% are lost to the environment. Therefore, the development of new varieties and formulations of pesticides with high efficiency, low toxicity or non-toxicity and low residue has always been the goal of research in the field of plant chemical protection. There are two main reasons for the waste and loss of pesticides: first, after exposure to the sun and rain, part of the pesticides will volatilize or be decomposed and cannot function; Effective spreading and staying cannot be formed, causing most pesticides to slide off or volatilize quickly after spraying...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/26A01N25/08A01N25/10A01N25/24A01N43/90A01N43/80
CPCA01N25/08A01N25/10A01N25/24A01N25/26A01N43/80A01N43/90
Inventor 吴雁吴学民佟雨佳赵彩艳
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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