CN-122004206-A - Chlorantraniliprole nanosuspension taking hectorite as stabilizer and preparation method and application thereof

Abstract

The invention discloses a chlorantraniliprole nanosuspension taking hectorite as a stabilizer, and a preparation method and application thereof, and relates to the technical field of pesticide preparations. Dispersing artificially synthesized hectorite (purity is 100%) in water to obtain a colloid suspension, adding a surfactant for intercalation reaction, dispersing superfine crushed chlorantraniliprole powder in the reaction solution, stirring at a high speed to form a uniform suspension, and ball-milling the suspension to obtain the nano pesticide suspension. The preparation method of the invention omits the defects of adding the dispersing aid and the thickening agent in the traditional process, and solves the problems of poor batch stability, inconsistent performance and the like of clay-based products in the industrial production process. In addition, the nano pesticide water suspending agent prepared by the invention has obvious control effect on plant diseases and insect pests.

Inventors

• WANG QIN
• WANG AIQIN
• MOU BIN
• ZHU YONGFENG
• YANG FANGFANG
• ZONG LI

Assignees

• 中国科学院兰州化学物理研究所

Dates

Publication Date

20260512

Application Date

20260211

Claims (5)

1. 1. The preparation method of the chlorantraniliprole nanosuspension taking hectorite as a stabilizer is characterized by comprising the following steps of: s1, preparing a stabilizer, namely dispersing hectorite with a lamellar thickness of less than 10 nm into water according to the mass percentage concentration of 0.5% -5.0% to form a colloid suspension, then adding a quaternary ammonium salt surfactant with a carbon chain length of C4-C18 into the colloid suspension, wherein the addition amount of the surfactant is 0.1% -2.0% of the total mass of the colloid suspension, and stirring and reacting for 4-12 hours at room temperature to finish intercalation and stripping to obtain an activated hectorite nanosheet dispersion; s2, preparing a nano suspending agent, namely carrying out superfine grinding on a chlorantraniliprole raw material, adding 5% -40% of the chlorantraniliprole raw material into the activated hectorite nano-sheet dispersion liquid obtained in the step S1 according to the final mass percentage concentration, stirring at a high speed of 4000-8000 rpm for 10-15 min to form a primary suspension, and carrying out ball milling treatment on the primary suspension for 0.5-4 hours under the conditions of a ball material mass ratio of 10:1-50:1 and a rotational speed of 100 rpm to obtain the chlorantraniliprole nano suspending agent taking hectorite as a stabilizer.
2. 2. The method of claim 1, wherein the ultra-fine pulverization is carried out at a rotation speed of 5000-10000 rpm for 2-10 min.
3. 3. The method of claim 1, wherein the particle size of the chlorantraniliprole nanosuspension with hectorite as a stabilizer is less than 200 nm.
4. 4. Use of a chlorantraniliprole nanosuspension according to any one of claims 1 to 3 for the preparation of a pesticidal formulation for controlling lepidopteran, hemipteran or thysanopteran pests.
5. 5. The use according to claim 4, wherein the pest is cabbage caterpillar, aphid, plutella xylostella or thrips.

Description

Chlorantraniliprole nanosuspension taking hectorite as stabilizer and preparation method and application thereof Technical Field The invention relates to a nano pesticide suspending agent, in particular to a chlorantraniliprole nano suspending agent taking hectorite as a stabilizer, and a preparation method and application thereof, and belongs to the technical field of nano pesticide application. Background Clay minerals have various morphology and structure (such as rod shape, tube shape, lamellar shape and the like), small size, large specific surface area, adjustable structure, easy chemical modification of the surface, abundant resources, low price and no toxicity, and have many reports and applications as pesticide nano carriers (CHEMICAL ENGINEERING Journal, 2018, 349: 101-110;Applied Clay Science, 2018,161: 194-202). Meanwhile, the suspension stability of the pesticide suspension and the adhesion of the pesticide on the surface of the blade can be remarkably improved based on the electronegativity, viscosity and surface-OH/Si-O-Si groups of the clay mineral (CHEMICAL ENGINEERING Journal, 2025, 503: 158168), so that the application of the clay mineral to the preparation of the pesticide suspension has been reported in recent years (CN 202411423925.7, CN202411424056.X, chemical Engineering Journal, 2025, 503: 158168). However, most clay minerals cannot be artificially synthesized, the components of clay minerals obtained from nature have obvious differences due to different geological factors, and the associated minerals cannot be completely separated by utilizing the existing purification technology, so that the problems of poor batch stability, inconsistent performance and the like of clay-based products often occur in the industrial production process. Hectorite is an artificially synthesized octahedral layered silicate clay mineral with purity up to 100%. The lamellar structure is composed of nanoscale lamellar layers, but due to the action of static electricity, the lamellar structure is in an aggregation state, and the exertion of the nano characteristics is restricted. Based on different synthesis methods, the thickness of the material is about several nanometers to hundreds of nanometers, the surface and the edge have double charge characteristics, and the intercalation cations between the layers can realize the delamination. Hectorite can form a three-dimensional network structure in water, has extremely strong gel property, thixotropic property, dispersibility, suspension property and thickening property, and can be used as a pesticide carrier, a pesticide suspension stabilizer and a dispersing agent. Therefore, the invention aims to introduce hectorite, and efficiently solve the existing problems of the water-insoluble pesticide suspending agent by utilizing the multifunctionality of the nano material. Disclosure of Invention The invention aims to provide a chlorantraniliprole nanometer suspending agent taking hectorite as a stabilizer, and a preparation method and application thereof, so as to solve the problems of multiple additive types, larger particle size, complex preparation process, poor storage stability, low bioavailability and the like of the existing chlorantraniliprole nanometer suspending agent, and the problems of poor batch stability, inconsistent performance and the like of the industrialized production of a clay-based pesticide suspending agent. In order to achieve the above purpose, the present invention adopts the following technical scheme: the chlorantraniliprole nanometer suspending agent taking hectorite as a stabilizer is prepared by the following steps: (1) Dispersing hectorite in water to form a colloidal suspension; (2) Adding a surfactant into the colloid suspension to perform intercalation reaction, so as to realize stripping and functionalization of the hectorite sheet; (3) Adding the superfine crushed chlorantraniliprole powder into a solution after intercalation reaction, and forming uniform suspension under the condition of high-speed stirring; (4) Ball milling is carried out on the suspension to obtain the nano pesticide suspending agent with uniform particle size distribution and high stability. Preferably, the thickness of the hectorite slices in the step (1) is less than 10 nm%, and the mass percentage concentration is 0.5% -5.0%. Preferably, the surfactant in the step (2) is at least one or two of quaternary ammonium salts with carbon chain length of C 4~C18, the mass percentage concentration is 0.1% -2%, and the reaction is carried out for 4-12 hours at room temperature. Preferably, the superfine crushed chlorantraniliprole powder in the step (3) is crushed for 2-10 min at a rotating speed of 5000-10000 rpm by using a superfine crusher, and the mass percentage concentration is 5% -40%. Preferably, in the step (3), the stirring is performed at a high speed, the stirring speed is 4000-8000 rpm, and the stirring time is 10 min. Preferably, in the step (4)