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Method for preparing microcapsule through aqueous emulsion electrospining

A microcapsule and water emulsion technology, applied in the fields of botany equipment and methods, pesticides, animal husbandry, etc., can solve the problems of rare raw materials, harsh conditions, complex technological processes, etc. simple effect

Active Publication Date: 2017-12-12
HAINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cyfluthrin is a class of high-efficiency and broad-spectrum insecticides, which are widely used in the control of agricultural pests. The electrostatic spray technology is used to prepare cyfluthrin microcapsules, which overcomes the characteristics of the original drug being insoluble in water, while the traditional preparation The raw materials of the method are rare, the technological process is complicated, the conditions are harsh and not environmentally friendly, and it is difficult to promote

Method used

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  • Method for preparing microcapsule through aqueous emulsion electrospining
  • Method for preparing microcapsule through aqueous emulsion electrospining
  • Method for preparing microcapsule through aqueous emulsion electrospining

Examples

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Embodiment 1

[0032] A method for preparing microcapsules by water-emulsion electrospinning, comprising the following steps:

[0033] (1) Preparation of water emulsion: solvent oil is used as emulsion solvent, sodium alginate derivative is used as emulsifier and cross-linked wall material, hydrochloric acid and sodium hydroxide are used as pH regulator, hydrochloric acid is used to adjust acidity, and sodium hydroxide is used to adjust Alkaline; deionized water is homogeneous, and a stable cyfluthrin water emulsion is prepared with a high-speed shear;

[0034] The specific operation is: dissolve the sodium alginate derivative in deionized water, dissolve completely in the deionized water, and stir it with a magnetic force to a uniform solution; then add the cypermethrin solvent oil solution to the solution, use a high-speed shearing machine, and rotate 10000r / min, emulsification for 2min, static defoaming, and the cyhalothrin water emulsion is obtained;

[0035] (2) Electrospinning of aque...

Embodiment 2

[0042] A method for preparing microcapsules by water-emulsion electrospinning, comprising the following steps:

[0043] (1) Preparation of water emulsion: solvent oil is used as emulsion solvent, sodium alginate derivative is used as emulsifier and cross-linked wall material, hydrochloric acid and sodium hydroxide are used as pH regulator, hydrochloric acid is used to adjust acidity, and sodium hydroxide is used to adjust Alkaline; deionized water is homogeneous, and a stable cyfluthrin water emulsion is prepared with a high-speed shear;

[0044]The specific operation is: dissolve the sodium alginate derivative in deionized water, dissolve completely in the deionized water, and stir it with a magnetic force to a uniform solution; then add the cypermethrin solvent oil solution to the solution, use a high-speed shearing machine, and rotate 20000r / min, emulsification for 15min, static defoaming, that is, bihalothrin aqueous emulsion;

[0045] (2) Electrospinning of aqueous emuls...

Embodiment 3

[0052] A method for preparing microcapsules by water-emulsion electrospinning, comprising the following steps:

[0053] (1) Preparation of water emulsion: solvent oil is used as emulsion solvent, sodium alginate derivative is used as emulsifier and cross-linked wall material, hydrochloric acid and sodium hydroxide are used as pH regulator, hydrochloric acid is used to adjust acidity, and sodium hydroxide is used to adjust Alkaline; deionized water is homogeneous, and a stable cyfluthrin water emulsion is prepared with a high-speed shear;

[0054] The specific operation is: dissolve the sodium alginate derivative in deionized water, dissolve completely in the deionized water, and stir it with a magnetic force to a uniform solution; then add the cypermethrin solvent oil solution to the solution, use a high-speed shearing machine, and rotate 20000r / min, emulsification for 10min, static defoaming, to obtain bihalothrin aqueous emulsion;

[0055] (2) Electrospinning of aqueous emu...

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Abstract

The invention relates to the field of biopolymer materials, and discloses a method for preparing a microcapsule through aqueous emulsion electrospining. The method comprises the following steps: firstly preparing an aqueous emulsion, and then preparing the aqueous emulsion into the microcapsule through electrostatic spinning. The microcapsule is prepared by adopting aqueous emulsion electrospining, the raw materials in the preparation method are easy to obtain, the technology is simple, the conditions are mild, the method is environmentally friendly and safe, the microcapsule is applicable for large-scale production, and the microcapsule has popularization and application values.

Description

technical field [0001] The invention relates to the field of biopolymer materials, in particular to a method for preparing microcapsules by water emulsion electrospinning. Background technique [0002] Sodium alginate is a natural polysaccharide polymer extracted from kelp or seaweed, a renewable marine resource. Sodium alginate has the advantages of non-toxicity, low cost, wide sources and biodegradability. The aqueous emulsion is stabilized by sodium alginate derivatives, and the sodium alginate derivatives are cross-linked by calcium chloride to obtain microspherical microcapsules. [0003] Microcapsules are preparations in which small liquid droplets or solid materials are wrapped by continuous polymer films or coating materials. The particle size is generally less than 200 microns. The encapsulation of microcapsules helps to convert liquid substances into solid materials. Changing the colloid and surface properties can improve the utilization rate of the encapsulated ...

Claims

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Application Information

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IPC IPC(8): A01N25/28A01N53/08A01P7/04
CPCA01N25/28A01N53/00
Inventor 李嘉诚冯玉红何富瑞
Owner HAINAN UNIVERSITY
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