Pesticide sustained-release agent with modified MCM-41 as carrier, and preparation method thereof

Abstract

The invention relates to a pesticide sustained-release agent with modified MCM-41 as a carrier, and a preparation method thereof. The preparation method specifically comprises the following steps: S1, Schiff base silane is prepared; S2, Schiff base-MCM-41 is synthesized; S3, metal complex modified MCM-41 is prepared; and S4, the pesticide sustained-release agent with modified MCM-41 as carrier is prepared. According to the invention, the modified MCM-41 mesoporous material is prepared with a co-precipitation method and is used for adsorbing pesticide; the material is placed in a corresponding environment, such that the pesticide effect can be released slowly. Therefore, pesticide loading amount and utilization rate are improved. Also, with the pesticide sustained-release agent provided by the invention, environment pollution caused by pesticides is reduced.

Description

technical field [0001] The invention belongs to the field of slow-release pesticides, in particular to a pesticide slow-release agent with modified MCM-41 as a carrier and a preparation method thereof. Background technique [0002] As far as the current development of my country's agriculture is concerned, pesticides are mainly used to prevent and control pests and weeds that harm crops; the use of pesticides is quick and cost-effective, but a large number of and unreasonable use of pesticides has caused harm to the ecological environment and human beings for a long time. Health brings with it a range of threats. The traditional pesticide formulations in my country mainly include powders, emulsifiable concentrates, etc., which generally contain organic solvents and surfactants. The pesticides in traditional formulations mainly stay on the surface of the earth and crops. The pesticides on the surface of some vegetables and fruits exceed the standard directly affecting human he...

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Problems solved by technology

Chinese patent 201210151360.2 discloses a triadimefon controlled-release agent with MCM-41 as a carrier and its preparation method. This patent directly blends MCM-41 and triadimefon to prepare a triadimefon controlled-release agent, although the patent can Adsorbs a certain amount of pesticides and has a more suitable release rate, but the MCM-41 in this patent has not been modified, and this unmodified mesoporous silica nanomaterial is used as a carrier for pesticides. The amount is small, the sustained release effect is poor, and the pesticide utilization rate is low; therefore, it is still necessary to seek an effective pesticide carrier to solve the above-mentioned technical problems existing in the prior art

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