Search

CN-122004213-A - Nanometer herbicide taking nanometer clay mineral as carrier and application thereof

CN122004213ACN 122004213 ACN122004213 ACN 122004213ACN-122004213-A

Abstract

The application relates to the technical field of pesticide preparations, and in particular discloses a nano herbicide taking nano clay minerals as carriers and application thereof, wherein the nano herbicide taking the nano clay minerals as the carriers is prepared from the following raw materials, by weight, 30-40 parts of carrier active substances, 10-15 parts of auxiliary agents and 45-60 parts of deionized water, wherein the carrier active substances are prepared by impregnating lignin mixed solution after loading biological raw materials with organic-inorganic composite modified montmorillonite, uniformly mixing, adding glutaraldehyde, stirring, standing, filtering, washing, freeze drying and grinding. The nano herbicide provided by the application can enable the active ingredients to be slowly released into the environment, so that the duration of the active ingredients is prolonged, and the application frequency of the herbicide is reduced.

Inventors

  • ZHAI SHENJI
  • Zhai Naikun
  • LIU BINGRUI
  • LI DONGHAI

Assignees

  • 山东奥坤作物科学股份有限公司

Dates

Publication Date
20260512
Application Date
20260416

Claims (8)

  1. 1. The nano herbicide taking the nano clay mineral as the carrier comprises the following raw materials in parts by weight: 30-40 parts of carrier active substance, 10-15 parts of auxiliary agent and 45-60 parts of deionized water; The carrier active substance is prepared by impregnating lignin mixed solution after loading biological raw materials by organic-inorganic composite modified montmorillonite, uniformly mixing, adding glutaraldehyde, stirring, standing, filtering, washing, freeze-drying and grinding.
  2. 2. The nano herbicide taking nano clay minerals as carriers, which is characterized in that the biological raw material is compounded by pendimethalin, prometryn and oxyfluorfen with the mass ratio of 8-10:5-6:1-2.
  3. 3. The nano herbicide taking nano clay mineral as a carrier according to claim 1, wherein the mass ratio of the dispersing agent, the wetting dispersing agent, the thickening agent, the preservative, the antifreezing agent and the defoaming agent in the auxiliary agent is 3-3.5:1.5:1:0.1-0.2:5-6:0.1.
  4. 4. The nano herbicide with nano clay mineral as carrier according to claim 1, wherein the preparation method of the carrier active substance comprises the following steps: Adding the organic-inorganic composite modified montmorillonite into deionized water, dispersing for 30-40min, adding biological raw material, stirring for 40-60min, filtering, washing, freeze-drying to obtain load particles, wherein the mass ratio of the organic-inorganic composite modified montmorillonite to the biological raw material is 5-6:1; Immersing the load particles in lignin mixed solution, mixing uniformly, adding glutaraldehyde, stirring for 1-2h, filtering, washing, freeze-drying and grinding to obtain the carrier active substance, wherein the mass ratio of the load particles to the lignin mixed solution is 1-1.2:20-25.
  5. 5. The nano herbicide taking nano clay mineral as a carrier according to claim 1, wherein the preparation method of the organic-inorganic composite modified montmorillonite comprises the following steps: (1) Dropwise adding a sodium carbonate solution into an aluminum chloride solution under continuous stirring, standing and ageing for 20-24 hours, adding CTAB, mixing, standing and ageing for 2-3 hours to obtain a mixed solution; (2) Dispersing montmorillonite in the mixed solution, standing and aging for 20-24 hours, filtering, washing, drying and grinding to obtain the organic-inorganic composite modified montmorillonite, wherein the mass ratio of aluminum chloride, sodium carbonate, CTAB and montmorillonite is 1-1.5:1:2-3:10.
  6. 6. The nano herbicide with nano clay mineral as carrier according to claim 1, wherein the dosage form of the nano herbicide is suspension agent.
  7. 7. The nano herbicide with nano clay mineral as carrier according to claim 1, wherein the preparation method of the lignin mixed solution comprises the following steps: (1) Dissolving lignin in NaOH solution, and then reacting with DETA and formaldehyde for 2-3 hours to obtain aminated modified lignin, wherein the mass ratio of lignin, naOH, DETA and formaldehyde is 1:0.03-0.04:7-8:2-3; (2) Adding polyvinyl alcohol and aminated modified lignin into deionized water, and stirring for 30-40min to obtain lignin mixed solution, wherein the mass ratio of polyvinyl alcohol to aminated modified lignin is 2-3:1.
  8. 8. The use of a nanoherbicide with a nanoclay mineral as a carrier according to any one of claims 1 to 7, characterized in that the nanoherbicide is used for controlling annual weeds in cotton fields.

Description

Nanometer herbicide taking nanometer clay mineral as carrier and application thereof Technical Field The application relates to the technical field of pesticide preparations, in particular to a nano herbicide taking nano clay minerals as carriers and application thereof. Background The herbicide is a common pesticide in agricultural production, can thoroughly or selectively kill farmland weeds and harmful plants, and the disease infection sources and the pest host number of crops can be reduced along with the disappearance of the weeds, so the use of the herbicide can bring great economic benefit to the agricultural production. However, about 90% of the herbicide is lost through various ways such as soil leaching and volatilization during or after application, so that the utilization rate and effect of the herbicide are reduced, and the use amount of the herbicide is increased continuously to increase the duration of the herbicide, so that the herbicide causes environmental pollution and endangers the health of people. Therefore, there is a need to prepare a slow-release pesticide, which can slowly release the pesticide within a certain time, prolong the pesticide effect, reduce the pesticide dosage and reduce pollution. Disclosure of Invention In order to solve the problems that the traditional herbicide is easily influenced by environmental factors, the drug effect is reduced and repeated application is needed, the application provides a nano herbicide taking nano clay minerals as carriers and application thereof. In a first aspect, the present application provides a nano herbicide using nano clay mineral as a carrier, which adopts the following technical scheme: The nano herbicide taking the nano clay mineral as the carrier comprises the following raw materials in parts by weight: 30-40 parts of carrier active substance, 10-15 parts of auxiliary agent and 45-60 parts of deionized water; The carrier active substance is prepared by impregnating lignin mixed solution after loading biological raw materials by organic-inorganic composite modified montmorillonite, uniformly mixing, adding glutaraldehyde, stirring, standing, filtering, washing, freeze-drying and grinding. According to the technical scheme, the montmorillonite is a biological clay mineral substance, has good crystallinity, has larger plane layer spacing on crystal faces, can be relatively easily inserted into layers, has good adsorption capacity, cation exchange capacity, adhesion capacity and drug carrying capacity, simultaneously has the lipophilicity and compatibility of organic modification, has the stability and adsorption uniformity of inorganic modification, can introduce organic functional groups on the surface of the montmorillonite, reduces hydrophilicity, improves oleophobicity, is easier to adsorb biological raw materials, improves loading rate, enhances the hydrophilicity of the montmorillonite, can be rapidly dispersed in deionized water, avoids agglomeration to form large particles, enables the biological raw materials to be uniformly adsorbed on the surface and pores of the montmorillonite, overcomes the defect of single modification, realizes synergistic effect, obtains the modified lignin mixed solution with larger specific surface area and stronger adsorption capacity, has the oxidation resistance, photolysis resistance and other capacities of lignin and the film forming property of polyvinyl alcohol, reduces hydrophilicity, improves the oleophylic acid resistance of the montmorillonite, prolongs the photo-oxidation resistance and the biological raw materials, prolongs the release time of the protective laminated biological raw materials, and the protective film of the biological raw materials. Optionally, the biological raw material is compounded by pendimethalin, prometryn and oxyfluorfen in a mass ratio of 8-10:5-6:1-2. By adopting the technical scheme, the three effective components are compounded into a new preparation, so that the dosage of the single component can be reduced, the generation of resistance is improved, and the weeding effect is further improved. Optionally, the mass ratio of the dispersing agent, the wetting dispersing agent, the thickening agent, the preservative, the antifreezing agent and the defoaming agent in the auxiliary agent is 3-3.5:1.5:1:0.1-0.2:5-6:0.1. By adopting the technical scheme, the dispersing agent has the core effects of reducing van der Waals force among particles by adsorbing on the surfaces of solid particles, preventing particles from agglomerating, finally enabling the particles to form a stable and uniform dispersion system in liquid, regulating the viscosity of the preparation by using the thickening agent, preventing active ingredient particles from settling and layering, inhibiting microorganism breeding in the preparation by using the preservative, avoiding deterioration of the preparation caused by microorganism breeding, prolonging the storage shelf life, reducing the fre