Adsorptive pesticide sustained-release agent preparation method

A slow-release agent and adsorption-type technology, which is applied in the field of preparation of adsorption-type pesticide slow-release agents, can solve the problems of uncontrolled release, low utilization rate of pesticides, and limited drug loading, so as to improve the adsorption performance and load capacity. The effect of dosage and adaptability

Inactive Publication Date: 2016-08-24
CHANGZHOU OPTICAL MATERIAL
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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 diato

Method used

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Embodiment Construction

[0017] Weigh 400-500g of diatomite and add it to 4-5L deionized water, stir thoroughly with a magnetic stirrer for 40-50min to obtain diatomite suspension, adjust the pH of diatomite suspension to 0.5mol / L hydrochloric acid solution 3~5; place the above suspension on a shaker and shake it for 40~60min. After the shaking is over, adjust the pH to 8~9 with 0.8mol / L sodium hydroxide solution and put it into an ultrasonic oscillator with a power of 200~300W. After ultrasonic treatment for 60-80 minutes, transfer it into a Buchner funnel, filter and wash with deionized water until the eluent is neutral, collect the obtained precipitate and put it in an oven, and dry it at 105-110°C for 2-3 hours to obtain diatom essence soil, spare;

[0018] （ 1 ） Weigh 5-10g lignin and add it to 80-100mL sodium hydroxide solution with a concentration of 0.3mol / L, mix well, add 12-15mL epichlorohydrin, and stir in a water bath at 60-70°C for 5-7 hours. The reactant was filtered and washed wi...

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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...

Claims

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Application Information

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IPC IPC(8): A01N25/12A01N57/16
CPCA01N25/12A01N57/16
Inventor 陈毅忠林茂平王统军
Owner CHANGZHOU OPTICAL MATERIAL
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