Studies On The Process Of Preparing Phoxim Microcapsule And Abamectin Microcapsule

Pesticide is the chemical for that mainly refers to prevent and control the pest damage to the agriculture, forestry and animal husbandry production and regulate plant growth. Traditional pesticide formulations are powder, butter, granula, etc. Conventional pesticide formulations have many problems. Such as large organic solvent consumption, poor stability, the work period is short, poor security. Microcapsule technology in the application of pesticide formulations, can well solve these problems.This paper with gelatin and arabic gum as wall material, respectively with phoxim and abamectin as core material, the preparation of phoxim microcapsule and abamectin microcapsule. Respectively on the stirring speed, pH, sacculation temperature, glue drug ratio, curing time, curing agent, such as the dosage influence factors. On this basis, I find out the optimal process conditions of the preparation of phoxim microcapsule and abamectin microcapsule by orthogonal experiment.Single factor and orthogonal experimental results show that the stirring speed, acidity, encystment temperature, curing time are the main influencing factors as the microcapsules encystation.The optimum process conditions are as follows:1.The preparation of phoxim microcapsule technology conditions as follows:the stirring speed of condensation reaction is1100r/min; the pH of condensation reaction is4.5; the sacculation temperature is60℃; the ratio of the glue medicine is1:1; the dosage of formaldehyde is5mL as curing agent; the curing time is60minutes; the stirring speed of curing reaction is300r/min; the pH of curing reaction is9.0. Was prepared under the process conditions of phoxim microcapsule round appearance, uniform particle size distribution, the encapsulation efficiency and drug-loading rate were83.6%and47.6%. 2. The preparation of abamectin microcapsules technology conditions as follows: the stirring speed of condensation reaction is500r/min; the pH of condensation reaction is4.0; the sacculation temperature is60℃; the ratio of the glue medicine is1:1; the dosage of formaldehyde is7mL as curing agent; the time of curing reaction is60minutes; the stirring speed of curing reaction150r/min, the pH of curing reaction is9.0. Under the process conditions were abamectin microcapsules round appearance, uniform particle size distribution, the encapsulation efficiency and drug-loading rate were92.3%and56%.