Adsorptive pesticide sustained-release agent preparation method

Abstract

The invention belongs to the field of pesticide sustained-release agents and discloses an adsorptive pesticide sustained-release agent preparation method. The method includes: preparing purified diatomite from diatomite, modifying lignin to obtain epoxidized lignin, preparing a modifier from the epoxidized lignin, and mixing the modifier with the purified diatomite to realize modification reaction to obtain an adsorptive pesticide sustained-release agent. By the modifier prepared from the lignin, adsorption performance of bentonite can be improved, and various active functional groups of the modifier have a certain adsorption effect on organic matters. By the prepared pesticide sustained-release agent, pesticide loading capacity is improved, pesticide efficacy duration is prolonged, pesticide utilization rate is increased, and environment pollution caused by pesticides is relieved.

Description

technical field [0001] The invention discloses a preparation method of an adsorption-type pesticide slow-release agent, belonging to the field of pesticide slow-release agents. Background technique [0002] Pesticides are a special type of commodity, and most of their original drugs need to be processed into different dosage forms before they can be applied. Therefore, the study of pesticide formulations has always been an extremely important link in the development and application of pesticides. However, the utilization rate of conventional pesticide formulations is only 20% to 30%, and there are problems such as fast release of active ingredients, short duration of drug effects, and serious ecological pollution. [0003] Pesticide slow-release technology can effectively solve the problems of fast release of pesticide active preparations and short effective action time, reduce or avoid the adverse effects of pesticides, and prolong the service life of pesticides. Adsorpti...

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention: the preparation process of the adsorption-type slow-release agent is simple, the cycle is short, and the cost is low, but the drug loading is limited, the slow-release effect is poor, and the utilization rate of pesticides is low, making it impossible to achieve real controlled release. , provides a method for preparing an adsorption-type pesticide slow-release agent. The present invention prepares diatomite from diatomite, then modifies lignin to obtain epoxidized lignin, and prepares epoxidized lignin to obtain As a modifier, the modifier and diatomite are mixed and modified to obtain an adsorption-type pesticide slow-release agent. The modifier prepared by using lignin in the present invention can not only improve the adsorption performance of bentonite, but also the modifier itself has many This active functional group also has a certain adsorption effect on organic matter. The prepared pesticide slow-release agent not only increases the drug loading capacity of pesticides, but also prolongs the efficacy of pesticides and improves the utilization rate of pesticides, and reduces the pollution of pesticides to the environment. with broadly application foreground