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Nano-cuprous oxide fungicide composite subjected to in-situ reduction of lignin

A technology of nano-cuprous oxide and bactericide composition, which is applied in the direction of bactericide, copper oxide/copper hydroxide, biocide, etc., can solve the problems of complex amorphous structure and low utilization rate, and achieve a simple and convenient preparation method, Reduced burden and broad application prospects

Inactive Publication Date: 2015-12-09
SHANDONG AGRICULTURAL UNIVERSITY
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  • Summary
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, lignin mainly exists in paper industry wastewater and agricultural waste, and its utilization rate is very low due to its complex amorphous structure.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh 50g of lignin, dissolve it with 50g of deionized water, centrifuge at 12,000 rpm for 8 minutes to remove impurities, adjust the pH of the centrifuged solution to 2-3 with concentrated hydrochloric acid to precipitate lignin, and then dissolve the precipitated Dissolve the lignin with deionized water of the same weight, centrifuge as above, remove impurities, adjust the pH value, make the lignin precipitate again, and dry the last precipitated lignin for later use; prepare a concentration of 30g / L lignin solution (lignin adjustment) respectively The pH of the lignin solution is 7) and the concentration is 50mmol / L copper sulfate solution; slowly drop 50mL copper sulfate solution into 50mL lignin solution, continue magnetic stirring, and react at 90°C for 2h to obtain nano-cuprous oxide suspension ; Filter the suspension to obtain a nano-cuprous oxide filter cake, wash the filter cake three times with distilled water, and dry at 20° C. for 24 hours to obtain a lignin...

Embodiment 2

[0024] The steps refer to Example 1, the difference is that the pH of the prepared lignin solution is 10, and the nano-cuprous oxide filter cake obtained by filtering is dried at 70° C. for 6 hours; 25 g of the prepared cuprous oxide powder and 8 g of polyepoxysuccinic acid, Add 12g of polymaleic anhydride, 0.5g of OP-100, and 0.5g of BS-12 into 54g of water and perform ball milling for 2 hours to obtain a nano-cuprous oxide fungicide composition.

Embodiment 3

[0026] Referring to Example 1, the difference is that the prepared lignin solution has a pH of 11, and the obtained nano-cuprous oxide filter cake is dried at 40° C. for 15 hours; 15 g of the prepared cuprous oxide powder, 2 g of polyaspartic acid, Add 8 g of polyacrylic acid, 1 g of penetrant JFC, and 0.5 g of sodium dodecylbenzenesulfonate into 73.5 g of water and perform ball milling for 3 hours to obtain a nano-cuprous oxide fungicide composition.

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Abstract

The invention relates to a nano-cuprous oxide fungicide composite subjected to in-situ reduction of lignin. The nano-cuprous oxide fungicide composite is prepared by mixing 10 to 40 parts of nano-cuprous oxide powder, 0.1 to 15 parts of surfactants, 5 to 30 parts of dispersants, and 30 to 70 parts of water, and grinding the mixture for 1 to 4 hours. As lignin, which is a natural high-molecular polymer, is taken as a reducing agent, and covers cuprous oxide to serve as a protecting agent, the prepared cuprous oxide product can be mixed with different surfactants and different dispersants according to different proportions, and the mixture is ground to obtain a suspending agent-type product. As no other poisonous reagent is added during the preparation process, the preparation method is simple, convenient and environmentally friendly, and the prepared product has an excellent sterilizing effect, so that the application prospect in the fields of agriculture, medicine and the like is wide..

Description

technical field [0001] The invention relates to a nano-cuprous oxide fungicide composition for in-situ reduction of lignin. Background technique [0002] There are various types of fungicides in pesticides, among which copper preparations have been used for the longest time and are also one of the most promising varieties. Copper preparations are divided into two categories: inorganic copper and organic copper. At present, inorganic copper is the main one, including copper sulfate, basic copper sulfate, copper oxychloride, copper hydroxide and cuprous oxide. Cuprous oxide has attracted the attention of many researchers due to its advantages of long-lasting drug effect, high safety, and not easy to produce drug resistance. [0003] Nano-cuprous oxide is a new type of bactericide. Its bactericidal effect is mainly due to the fact that nano-cuprous oxide can slowly release copper ions, react with SH-, -S-S bonds to form mercapto copper compounds, and then disturb the physiolog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/20A01N25/04A01P1/00A01P3/00B82Y40/00C01G3/02A61K33/34A61P31/00
Inventor 艾仕云刘培李培培殷焕顺侯菊英
Owner SHANDONG AGRICULTURAL UNIVERSITY
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