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Method for preparing microcapsule
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A technology of microcapsules and mixed solutions, applied in the field of preparation of new separation materials, achieves the effects of low equipment requirements, widened system selection range and simple operation
Active Publication Date: 2011-06-29
TSINGHUA UNIV
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Problems solved by technology
But in this way, only dichloromethane or chloroform-soluble polymer materials can be used as the wall material of microcapsules
Method used
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Embodiment 1
[0021] A is polyacrylonitrile, solvent B is N,N-dimethylformamide, core material C is extractant Aliquat 336, D is simethicone, and the mixing method is stirring.
[0022] Take 1g of polyacrylonitrile and 1g of Aliquat 336, and dissolve them in 10ml of N,N-dimethylformamide to make a solution. Then slowly pour the polymer solution into 500ml of simethicone under stirring conditions, control the temperature at 90°C, and volatilize for 12 hours to obtain polyacrylonitrile-coated Aliquat 336 microcapsules.
Embodiment 2
[0024] The polymer material A is chitosan, the solvent B is a mixed solution of acetic acid and water, the core material C is a chiral separation agent bovine serum albumin, D is simethicone, and the mixing method is microfluidic shearing.
[0025] Get 1g chitosan, 0.5g bovine serum albumin, dissolve in the mixed solution that is made up of 19g water and 1g acetic acid and make polymer solution. Then, in the T-shaped microchannel, simethicone oil is used as the continuous shear milking for the above-mentioned polymer solution. After the emulsion is collected in a beaker, it is stirred and volatilized at 35° C. for 60 hours to obtain chitosan-coated bovine serum albumin microcapsules.
Embodiment 3
[0027] Polymer material A is polysulfone, solvent B is N-methylpyrrolidone, core material C is tetraethylene glycol, D is a mixed solution of dimethyl silicone oil and n-heptane, and the mixing method is microfluidic shearing.
[0028] Take 1g of polysulfone and 1g of tetraethylene glycol and dissolve them in 15ml of N-methylpyrrolidone to make a polymer solution. Simethicone oil and n-heptane were prepared into a mixed solution at a mass ratio of 5:1. Then, in the T-shaped microchannel, the mixed solution of simethicone oil and n-heptane is continuously used for shearing milk production relative to the above polymer solution. The prepared emulsion is collected in a beaker and left to stand for 20 minutes, and N-methylpyrrolidone is dissolved in the continuous phase to obtain polysulfone-coated tetraethylene glycol microcapsules.
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Abstract
The invention provides a method for preparing a micro-capsule, which belongs to the technical field of material preparation. As the scope of an application system that prepares micro-capsule with a solvent extraction method and a solvent volatilization method is widened, the invention discloses a method for preparing the micro-capsule, which includes the following procedures: high molecular wall material A, solvent B and core material C are selected, and dissolved to prepare mixed solution; the mixed solution is dispersed into liquid D to from a mixed liquor drop; the mixed liquor drop has two curing modes, one is that the solvent B is indissoluble to the D, and the solvent B gradually volatilizes to the air, the high molecular material A is cured and separated so as to form the micro-capsule wrapped by the core material; another mode is that the solvent B is indissoluble to the D, the solvent B is gradually dissolved into the D and the high molecular material A is cured and separatedso as to from the micro-capsule wrapped by the core material. The invention is easy to operate and the requirement on the equipment is low, thus effectively widening the selection scope of the application system that prepares the micro-capsule with the solvent extraction method and the solvent volatilization method.
Description
technical field [0001] The invention relates to the preparation technology of novel separation materials used in the fields of chemical industry, metallurgy, medicine and the like, in particular to the preparation technology of microcapsules. Background technique [0002] Microencapsulation technology is a rapidly developing, widely used and relatively mature technology in today's world. The process of making microcapsules is called microencapsulation. It is a solid, liquid or gas enclosed in a tiny capsule. The wall shell used for encapsulation is called the wall material, and the encapsulated capsule core is called the core material. In recent years, microencapsulation technology has been increasingly widely used in the fields of chemical industry, metallurgy, medicine, food, fertilizer and feed. Solvent extraction and solvent evaporation are common techniques for preparing microcapsules, which have the advantages of being simple and controllable. The common feature of...
Claims
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Application Information
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