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

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...

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, which is basically impossible in industry

[0008] At present, there are few reports on the preparation of microcapsules with lignin as the main wall material, and the low loading rate of the original drug, the high decomposition rate of the original drug during the embedding process, the large particle size of the microcapsules, and the complicated preparation process are common. Problem, there are no reports about the use of pH-responsive lignin derivatives as wall materials to prepare microcapsules

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