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Method for synthesizing pesticide controlled-release formulation by modifying calcium chloroaluminate hydrate activated pillar

A technology for hydrating calcium chloroaluminate and slow-release agent, which is applied in the fields of botanical equipment and methods, biocides, animal repellents, etc.

Active Publication Date: 2015-02-04
JIANGSU LONGCHANG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]The organic compound-based pesticide slow-release agent realizes the controlled release of pesticides, and overcomes the harm of traditional pesticides to a large extent, but it still has the following shortcomings Advantages: (1) Due to the requirement of degradability without secondary pollution, there are not many types of organic polymer compounds to choose from; (2) According to the mechanism of action, although the effective components of pesticides can theoretically be combined with polymer compounds The reactive groups on the main chain interact one by one, but affected by factors such as steric hindrance, the immobilization capacity of the effective components of pesticides in some pesticide sustained-release agents is not high; (3) some pesticide sustained-release agents , mostly ester-based slow-release agents, which have good pesticide slow-release effects under acidic and neutral conditions, but the release rate of pesticides under alkaline conditions is too fast; (4) The range of pesticide selection is limited Certain restrictions, usually only applicable to non-polar or weakly polar pesticides
Hussein et al. assembled the plant growth regulator α-naphthalene acetic acid intercalated ZnAl-LDHs, whose slow-release performance is significantly affected by the pH of the environment. Aiming at the lack of chemical pesticide slow-release agents, they invented calcium chloroaluminate hydrate active pillars. A method for synthesizing pesticide sustained-release agents, but the current reports on organo-LDHS sustained-release materials are mainly limited to the assembly of materials and preliminary research on the sustained-release behavior under simulated conditions, and the scope of application is narrow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Take 45mI calcium chloroaluminate hydrate mixed salt solution, slowly add it into 0.09mol / ml sodium dodecylsulfonate SDS solution, and adjust its pH continuously with NaOH to fix it at 10±0.2. This process was carried out at room temperature, followed by stirring for one day, and then placed in a 65°C oven for three days. Finally, filter, wash with water, and wash with ethanol.

[0024] According to SDS and A1 3+ Modified calcium chloroaluminate hydrate with different SDS content (ASDS) was prepared in different ratios, and the modified calcium chloroaluminate hydrate was made into modified hydrotalcite-like according to conventional methods, and (5g) modified hydrotalcite-like Dispersed into 50ml of imidacloprid solution containing imidacloprid concentration of 8g / L in volume ratio 4:1 toluene / ethanol mixed solvent, then placed in a three-necked flask with magnetic stirring, heated at 70°C for 4 days, and the final product Centrifuge at 3000r / min for 20min, wash once...

Embodiment 2

[0027] Take 50mI calcium chloroaluminate hydrate mixed salt solution, slowly add it to 0.09mol / ml sodium dodecylsulfonate SDS solution, and adjust its pH continuously with NaOH to fix it at 8±0.2. This process was carried out at room temperature, followed by stirring for one day, and then placed in a 65°C oven for three days. Finally, filter, wash with water, and wash with ethanol.

[0028] According to SDS and A1 3+ The modified calcium chloroaluminate hydrate with different SDS content (ASDS) is prepared in proportion, the modified calcium chloroaluminate hydrate is made into modified hydrotalcite-like according to conventional methods, and 10 g of modified hydrotalcite-like is dispersed in 80ml of imidacloprid solution containing imidacloprid concentration of 12g / L in a toluene / ethanol mixed solvent with a volume ratio of 4:1, then placed in a three-necked flask with magnetic stirring, heated at 70°C for 4 days, and the final product was heated at 3000r / min centrifuged f...

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Abstract

The invention discloses a method for synthesizing pesticide controlled-release formulation by modifying calcium chloroaluminate hydrate activated pillar, which comprises the steps of modifying the calcium chloroaluminate hydrate by using sodium dodecyl sulfate (SDS), preparing the modified calcium chloroaluminate hydrate with different SDS contents according the proportion of sodium dodecyl sulfate and A13<+>, preparing the modified calcium chloroaluminate hydrate into modified hydrotalcite-like compounds; dispersing the hydrotalcite-like compounds into imidacloprid solution with methylbenzene and ethyl alcohol as mixed solvents so as to form nanohybrids pesticide controlled-release formulation with different drug-loading rates. By using the method disclosed by the invention, the degradability requirement on secondary pollution are not generated; the type of the alternative organic high molecular compounds is various; the fixed load of the efficient component of a pesticide in the pesticide controlled-release formulation is relatively high; the pesticide controlled-release effect is relatively in the alkaline, acid and neutral conditions; the controlled-release effect of the pesticide can be realized under certain conditions, so that the limitation of taking high molecular organics as carriers by most of the traditional controlled-release formulations is broken.

Description

technical field [0001] The invention relates to a method for synthesizing a pesticide slow-release agent through modified calcium chloroaluminate hydrate active pillars, and belongs to the field of chemically synthesized pesticide slow-release agents. Background technique [0002] The existing controlled-release formulations of pesticides can be divided into physical sustained-release formulations and chemical sustained-release formulations according to the host-guest interaction. The chemical slow-release agent uses the effective components of the pesticide to bond with the matrix to form a slow-release pesticide that can be released gradually under natural conditions. The shortcomings of the combination of effective components and the matrix, so its structural stability and selectivity to external conditions are enhanced, and the shortcomings of the original pesticide itself in terms of water solubility, stability, toxicity and drug resistance have been improved, and the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/08A01N51/00
Inventor 吴春江杨伯平孙斌
Owner JIANGSU LONGCHANG CHEM