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Microencapsulation method for water-soluble inorganic salt

A water-soluble inorganic salt and microencapsulation technology, applied in microcapsule preparations, microsphere preparation and other directions, can solve the problems of small particle size, complex preparation process and high preparation cost of microcapsules, and achieve small particle size and simple preparation process. , the effect of improving dispersion

Inactive Publication Date: 2014-05-07
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prepared microcapsules have small particle size and narrow particle size distribution, but the preparation process is relatively complicated and the preparation cycle is relatively long, which makes the preparation cost relatively high

Method used

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  • Microencapsulation method for water-soluble inorganic salt

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Add 1.0 g of ethyl cellulose to 20 g of dichloromethane and stir until the ethyl cellulose is completely dissolved to form oil phase A 0 ; to the above oil phase A 0 Add 2g surfactant span80 (sorbitan oleate) and 0.7g co-surfactant aluminum stearate to form oil phase solution A; add 1.2g water-soluble inorganic salt potassium chloride to 5.0g deionized water, Form aqueous phase solution B; Solution B is slowly added in solution A, forms stable W / O type emulsion under 600r / min stirring speed; In above-mentioned emulsion, add 18g liquid paraffin and 6.5g non-solvent n-hexane, The microcapsules are separated; they are washed with n-hexane and deionized water respectively, suction filtered and dried to obtain the microcapsules of potassium chloride.

Embodiment 2

[0038] Add 0.5 g of ethyl cellulose to 15 g of chloroform and stir until the ethyl cellulose is completely dissolved to form oil phase A 0 ; to the above oil phase A 0 Add 1.0g surfactant span80 and 0.3g cosurfactant aluminum stearate to form oil phase solution A in 3.0g deionized water; Add 1.5g water-soluble inorganic salt calcium chloride in 3.0g deionized water, form water phase solution B; B is slowly added to solution A to form a stable W / O emulsion at a stirring rate of 400r / min; add 18g of liquid paraffin and 13g of non-solvent petroleum ether to the above emulsion to separate the microcapsules; Wash with deionized water, suction filter and dry to obtain microcapsules of calcium chloride.

Embodiment 3

[0040] Add 0.6g of ethyl cellulose to 11g of toluene and stir until the ethyl cellulose is completely dissolved to form oil phase A 0 ; to the above oil phase A 0 Add 1.4g surfactant span80 and 0.6g cosurfactant aluminum stearate to form oil phase solution A in 3.0g deionized water; Add 1.5g water-soluble inorganic salt calcium chloride in 3.0g deionized water, form water phase solution B; B is slowly added to solution A to form a stable W / O emulsion at a stirring rate of 800r / min; add 18g of liquid paraffin and 10g of non-solvent petroleum ether to the above emulsion to separate the microcapsules; Wash with deionized water, suction filter and dry to obtain microcapsules of calcium chloride.

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Abstract

The invention discloses a microencapsulation method for a water-soluble inorganic salt. The method comprises the following steps: adding a high-molecular wall material into an organic solvent and carrying out stirring until the wall material is completely dissolved, thereby forming an oil phase A0; adding a surfactant and a cosurfactant into the oil phase A0 so as to form an oil phase solution A; adding the water-soluble inorganic salt into deionized water so as to form a water phase solution B; slowly adding the solution B into the solution A and carrying out stirring so as to form a W / O type emulsion; and adding protective liquid into the W / O type emulsion, then adding a non-solvent and allowing the high-molecular wall material to be precipitated and deposited on the surface of the water-soluble inorganic salt, thereby obtaining a microcapsule of the water-soluble inorganic salt. The method is more economic, practical and highly efficient; and the prepared microcapsule has a small particle size and good dispersibility.

Description

technical field [0001] The invention relates to the microencapsulation of inorganic salts, in particular to a microencapsulation method of water-soluble inorganic salts. Background technique [0002] Microcapsule technology is a technology that uses natural or synthetic polymer materials as the shell material, and coats solid, liquid or gas as the core material to form a microcapsule with a semi-permeable or sealed capsule. Microcapsules generally have a diameter of 1 μm to 1 mm. Although there are many preparation methods of microcapsules, different methods have corresponding core materials and wall materials. [0003] Water-soluble inorganic salts are widely used in chemical synthesis and production as phase change materials, reversible temperature display materials, food or drug additives. Therefore, it is very important to realize the microencapsulation of water-soluble inorganic salts. The microencapsulation process of water-soluble materials is complicated. At prese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02
Inventor 刘方方路遥黄晓义武立斌
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI