Check patentability & draft patents in minutes with Patsnap Eureka AI!

Lignin-based polyurea pesticide microcapsules and preparation method thereof

A lignin-based, microcapsule technology, applied in botany equipment and methods, animal repellents, biocides, etc., can solve problems such as high cost and refractory degradation, and achieve environmental problems that are refractory to degradation and improve reactivity , the effect of reducing production costs

Inactive Publication Date: 2017-06-30
SOUTH CHINA UNIV OF TECH
View PDF6 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problems of high cost and difficult degradation of polyurea as the wall material of pesticide microcapsules in the above-mentioned prior art, the primary purpose of the present invention is to provide a method for preparing lignin-based polyurea pesticide microcapsules

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Lignin-based polyurea pesticide microcapsules and preparation method thereof
  • Lignin-based polyurea pesticide microcapsules and preparation method thereof
  • Lignin-based polyurea pesticide microcapsules and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Preparation of lignin / pesticide Pickering emulsion: First, take 1g of bamboo pulp alkali lignin and dissolve it in 4g of DMF, add 180g of water to make an aqueous phase; mix 3g of abamectin, 6g of MDI, 0.5g of epoxy Propane chloride and 10g toluene are mixed and dissolved to form an oil phase; then the oil phase and the water phase are mixed, 0.01g OP-10 is added, and an emulsifier is used to emulsify at 8000rpm for 20min to obtain the O / W picogram of lignin / pesticide forest lotion.

[0041](2) Synthesis of lignin-based polyurea pesticide microcapsules: react the above emulsion at 200rpm stirring speed and 35°C for 1h, then make 0.1g of ethylenediamine into 5mL aqueous solution, add it to the above reaction system and continue to react for 1h Finally, the aqueous suspension of lignin-based polyurea pesticide microcapsules is obtained, which is suction filtered, washed and dried to obtain solid microcapsule particles.

Embodiment 2

[0043] (1) Preparation of lignin / pesticide Pickering emulsion: First, 1 g of enzymatic lignin was dissolved in a mixture of 5 g of DMF and DMSO, and 150 g of water was added to make an aqueous phase; Mix and dissolve oxychloropropane and 6g chlorobenzene to make an oil phase; then mix the oil phase and the water phase, add 0.04g SDS, and use an emulsifier to emulsify at 12000rpm for 15min to obtain the O / W Pickering of lignin / pesticide lotion.

[0044] (2) Synthesis of lignin-based polyurea pesticide microcapsules: react the above emulsion at 30°C for 2 hours at a stirring speed of 300rpm, then make 0.3g of diethylenetriamine into a 5mL aqueous solution, and add it to the above reaction system After continuing the reaction for 1.5 hours, the aqueous suspension of lignin-based polyurea pesticide microcapsules was obtained, which was filtered by suction, washed and dried to obtain solid microcapsule particles.

Embodiment 3

[0046] (1) Preparation of lignin / pesticide Pickering emulsion: firstly take 1g of wheatgrass lignin and dissolve it in 6gDMSO, add 170g of water to make water phase; mix 5g of abamectin, 5g of MDI, 0.8g of epichlorohydrin Mix and dissolve with 8g toluene to make an oil phase; then mix the oil phase and water phase, add a mixture of 0.03g OP-10 and SDS, and use an emulsifier at 11000rpm to emulsify for 10min to obtain a lignin / pesticide O / W skin Crean Lotion.

[0047] (2) Synthesis of lignin-based polyurea pesticide microcapsules: react the above emulsion at 250rpm stirring speed and 40°C for 3h, then make 0.5g of hexamethylenediamine into 5mL aqueous solution, add it to the above reaction system and continue to react for 2h Finally, the aqueous suspension of lignin-based polyurea pesticide microcapsules is obtained, which is suction filtered, washed and dried to obtain solid microcapsule particles.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of pesticide microcapsules and discloses lignin-based polyurea pesticide microcapsules and a preparation method thereof. The method specifically comprises the following steps of: (1) dissolving lignin in an organic solvent 1 and then adding water to prepare a water phase; mixing and dissolving a pesticide, isocyanate, epoxy chloropropane and an organic solvent 2 to prepare an oil phase; then mixing the oil phase with the water phase, adding a surfactant, and performing emulsification to obtain an O / W Pickering emulsion of lignin / pesticide; and (2) after heating the emulsion to react, adding an amine substance solution for further reacting to obtain a lignin-based polyurea pesticide microcapsule aqueous suspended liquid, and performing suction filtration, washing and drying to obtain solid microcapsule particles. The invention also provides the lignin-based polyurea pesticide microcapsules prepared by the method. By taking lignin as one of wall material raw materials, the cost is effectively lowered, and the material can be degraded; and lignin molecules contain a lot of hindered phenol structures, so that the light stability of a photosensitive or an oxygen-sensitive pesticide is improved.

Description

technical field [0001] The invention belongs to the technical field of pesticide microcapsule preparation, in particular to a lignin-based polyurea pesticide microcapsule and a preparation method thereof. Background technique [0002] Pesticide microcapsules use physical or chemical methods to disperse the original drug into particles of a few microns to hundreds of microns, and then wrap and fix them with natural or synthetic polymer compounds to form a capsule with a certain coating strength that can control the release of the original drug. Semi-permeable capsules. Since the active ingredient is covered by the capsule wall material, it is isolated from the surrounding environment, so the microcapsule has some outstanding features compared with conventional dosage forms: the active ingredient can be released slowly, reducing the number of medications, reducing environmental pressure, and improving the utilization rate of pesticides; Slow down the degradation of pesticides...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): A01N25/28A01N43/90A01N53/08A01N57/16
CPCA01N25/28A01N43/90A01N53/00A01N57/16
Inventor 邱学青庞煜霞王盛文杨东杰钱勇
Owner SOUTH CHINA UNIV OF TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com