Abamectin microcapsule powder prepared from lignin-based wall material and method for preparing abamectin microcapsule powder by use of lignin-based wall material

A technology of abamectin and microcapsule powder, which is applied in the field of abamectin microcapsule powder, can solve the problems of low-efficiency embedding methods, no innovation, and low loading rate of the original drug, so as to prevent ultraviolet light solution, easy to control, and solve the effect of not being resistant to sunlight photolysis

Active Publication Date: 2015-11-04
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, the prepolymer is emulsified with abamectin, solvent, and emulsifier in one pot, and then acidified and condensed. The whole process is completely similar to the preparation method of urea-formaldehyde resin microcapsules. There is no innovation in the method. Adding lignin raw materials on the basis of the above; this method requires a large amount of wall materials, and the loading rate is very low, and the particles are large, which is a very inefficient embedding method, whi

Method used

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  • Abamectin microcapsule powder prepared from lignin-based wall material and method for preparing abamectin microcapsule powder by use of lignin-based wall material
  • Abamectin microcapsule powder prepared from lignin-based wall material and method for preparing abamectin microcapsule powder by use of lignin-based wall material
  • Abamectin microcapsule powder prepared from lignin-based wall material and method for preparing abamectin microcapsule powder by use of lignin-based wall material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Dissolve 100g of sodium lignosulfonate in 400g of water, adjust the pH to 12, activate in a water bath at 50°C for 0.5h, add 50g of diethylenetriamine, slowly add 50g of formaldehyde dropwise, complete the dropwise addition within 0.5h, and raise the temperature to 70°C °C, the reaction was continued for 4 h to obtain a sodium amino lignosulfonate solution. The obtained sodium amino lignosulfonate solution is extracted with ethanol, and the residual solid after extraction is washed with petroleum ether and then freeze-dried to obtain purified powdery sodium amino lignosulfonate.

[0045] Dissolve 100g of purified amino lignosulfonate sodium wall material, 8g of sodium lauryl sulfate and 5g of polyethylene glycol 1000 in 200g of water to prepare an aqueous solution to obtain the aqueous phase; dissolve 100g of abamectin in 500g of dichloromethane to obtain the organic phase. Add the organic phase to the water phase evenly within 30 minutes at 1000rpm, and then shear for...

Embodiment 2

[0047] Dissolve 100g of sodium lignosulfonate in 150g of water, adjust the pH to 10, activate in a water bath at 60°C for 1.0h, add 20g of triethylamine, slowly add 20g of acetaldehyde dropwise, complete the dropwise addition within 1h, and raise the temperature to 80°C , Continue to react for 2h to obtain sodium amino lignosulfonate solution. The obtained sodium amino lignosulfonate solution is extracted with ethanol, and the residual solid after extraction is washed with petroleum ether and then freeze-dried to obtain purified powdery sodium amino lignosulfonate.

[0048] 100g of purified amino lignosulfonate wall material and 5g of Tween-80 were dissolved in 350g of water to prepare an aqueous solution to obtain an aqueous phase; 20g of abamectin was dissolved in 200g of dimethyl sulfoxide to obtain an organic phase . Add the organic phase to the water phase evenly within 30 minutes at 800rpm, and then shear for 10 minutes; then adjust the pH of the dispersion to 6.5 with ...

Embodiment 3

[0050] Dissolve 100g of sodium lignosulfonate in 200g of water, adjust the pH to 11, activate in a 70°C water bath for 1.0h, add 200g of diethylamine, slowly add 200g of propionaldehyde dropwise, complete the dropwise addition within 1h, and raise the temperature to 90°C , Continue to react for 3h to obtain sodium amino lignosulfonate solution. The obtained sodium amino lignosulfonate solution is extracted with ethanol, and the residual solid after extraction is washed with petroleum ether and then freeze-dried to obtain purified powdery sodium amino lignosulfonate.

[0051] 100g of purified amino lignosulfonate wall material and 12g of sodium dodecylbenzenesulfonate are dissolved in 400g of water to prepare an aqueous solution to obtain an aqueous phase; 80g of abamectin are dissolved in 100g of pyrrolidone and 200g of ethanol mixed solvent , an organic phase was obtained. Add the organic phase to the water phase evenly within 30 minutes at 1000rpm, and then shear for 20 min...

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Abstract

The invention discloses abamectin microcapsule powder prepared from a lignin-based wall material and a method for preparing the abamectin microcapsule powder by use of the lignin-based wall material. The method comprises the following steps: dissolving a purified amido sodium lignosulfonate wall material and an emulsifying agent in water so as to prepare an aqueous solution to obtain a water phase; dissolving an abamectin tech in an organic solvent to obtain an organic phase; uniformly adding the organic phase into the water phase under a rotating condition, and then shearing; and then regulating the pH value of a dispersion liquid and performing a complex coacervation reaction; cooling, adding a cross-linking agent for a cross linking reaction, performing centrifugal separation, filtering and drying to obtain the microcapsule powder. The preparation process of the abamectin microcapsule powder is simple, the wall material is environmentally friendly and degradable, and abamectin tech photolysis can be prevented; the prepared microcapsule is relatively high in drug-loading rate and entrapment rate and obvious in slow release effect, and regulation and control on release can be realized within a certain pH range.

Description

technical field [0001] The invention relates to an abamectin microcapsule powder, in particular to a method for preparing abamectin microcapsule powder by using a lignin-based wall material. Background technique [0002] my country is a big country in the production and consumption of pesticides. In 2013, the output and self-use of pesticide preparations in my country were about 1.6 million tons and 1 million tons respectively. According to statistics, the amount of pesticides used per unit of arable land in my country is 2.5 times the world average. The use of a large amount of pesticides has kept production, but it has also caused serious pollution to the environment. The traditional pesticide preparations based on powder, wettable powder and emulsifiable concentrate have problems such as low utilization rate of pesticides and easy harm to the environment and mammals. Therefore, modern pesticide preparations are gradually becoming more efficient, low-toxic, low-residue, ec...

Claims

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Application Information

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IPC IPC(8): A01N43/90A01N25/28A01N25/12
Inventor 周明松许锐林邱学青杨东杰庞煜霞
Owner SOUTH CHINA UNIV OF TECH
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