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Nano-silver water dispersible granules and preparation method and application thereof

A technology of nano-silver and disperse particles, which is applied in the field of pesticide chemistry, can solve the problems of unstable packaging and transportation of active ingredients of drugs, and the inapplicability of nano-silver, and achieve the effects of solving instability, saving costs, and easily obtaining raw materials

Inactive Publication Date: 2020-05-08
陕西麦可罗生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when applied in agriculture, the active ingredients of the drug have many problems such as instability, packaging and transportation, and the common dosage forms of nano-silver are not suitable. Therefore, it is urgent to develop a dosage form suitable for nano-silver in the field of agriculture.

Method used

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  • Nano-silver water dispersible granules and preparation method and application thereof
  • Nano-silver water dispersible granules and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The percentage content of each component of 1% nano silver water dispersible granule is as follows:

[0023] Nano Silver 1%

[0024] Pull open powder 8%

[0025] Ammonium sulfate 12%

[0026] Bentonite 10%

[0027] Silica balance

[0028] The bentonite is pre-crushed, then fully mixed with the above-mentioned other components, and then pulverized by the airflow pulverization method to obtain a 1% nano-silver wettable powder. Using the rotary disc granulation method, the prepared wettable powder is first added to the inclined rotary disc, and sprayed with water at the same time for granulation. Then the prepared granules are dried, and the temperature is controlled at 50-80°C. Finally, after sieving, 1% nano silver water dispersible granules are obtained.

Embodiment 2

[0030] The percentage content of each component of 0.5% nano silver water dispersible granule is as follows:

[0031] Nano silver 0.5%

[0032] Sodium dodecylbenzenesulfonate 10%

[0033] Anhydrous sodium sulfate 10%

[0034] Carboxymethyl Cellulose 15%

[0035] Kaolin balance

[0036] The kaolin is pre-crushed, then thoroughly mixed with the above-mentioned other components, and then pulverized by the airflow pulverization method to obtain a 0.5% nano-silver wettable powder. Using the extrusion granulation method, the prepared wettable powder and a certain amount of carboxymethyl cellulose-containing aqueous solution are kneaded in a kneader at the same time to make a plastic material, and the moisture content is controlled at 18%. Enter the extrusion granulator for granulation. Then the prepared granules are dried, and the temperature is controlled at 52-80°C. Finally, after sieving, 0.5% nano silver water dispersible granules are obtained.

Embodiment 3

[0038] The percentage content of each component of 20% nano silver water dispersible granule is as follows:

[0039] Nano Silver 20%

[0040] Sodium lignosulfonate 5%

[0041] Calcium Chloride 10%

[0042] Lactose 15%

[0043] Diatomaceous earth balance

[0044] Using dry crushing and granulation method, pre-crushed sodium lignosulfonate and diatomaceous earth to pass 20 meshes, and then fully mixed with nano-silver, calcium chloride, lactose, degassed, compressed, crushed, and sieved In four stages, 20% nano silver water dispersible granules were prepared.

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Abstract

The invention relates to nano-silver water dispersible granules and a preparation method and application thereof. The nano-silver water dispersible granules comprise the following components in percentage by mass: 0.1-92% of nano-silver, 1-20% of a wetting dispersant, 1-15% of a disintegrating agent, 0.1-10% of a binder and 0-95% of filler, and the sum of the components is 100%. The preparation method comprises the following steps: firstly, preparing the nano-silver active compound, the auxiliary agent, the auxiliary and the like into wettable powder, then performing granulating by adopting granulation methods such as extrusion, a turntable and a fluidized bed, finally performing drying at 50-80 DEG C, and performing screening, thereby obtaining the product. Bioactivity test experiments show that the nano-silver water dispersible granules have good inhibitory activity on plant pathogenic bacteria such as Xanthomonas citri, Xanthomonas oryzae pv, ralstonia solannacearum and cabbage softrot bacteria.

Description

technical field [0001] The invention belongs to the field of pesticide chemistry, and in particular relates to a nano-silver water-dispersible granule and its preparation method and application. Background technique [0002] Nano-silver is a powder composed of metallic silver particles with a particle size of 1-100 nm. Its particle size is ultra-fine and its surface area is large, so it has obvious surface electronic characteristics. Nano-silver can not only contact with bacteria, enter the inside of bacteria, and combine with sulfhydryl groups in bacterial metabolic enzymes to inactivate metabolic enzymes, but also react with bacterial cell walls with peptidoglycan to form reversible complexes, thereby hindering the oxygen supply of bacteria It can also combine with bacterial DNA, cause DNA denaturation, and then affect bacterial DNA replication. Moreover, compared with ordinary silver particles, silver particles with a size of only tens of nanometers have stronger biochem...

Claims

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Application Information

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IPC IPC(8): A01N59/16A01N25/14A01P1/00
CPCA01N25/14A01N59/16
Inventor 高嫚妮杨宏勃潘忠成翁婧李蒲民
Owner 陕西麦可罗生物科技有限公司
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