Preparation method for realizing micro-encapsulation of core material by acoustic surface wave atomizer
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A surface acoustic wave and microencapsulation technology, which is applied in the preparation field of microencapsulation technology, can solve the problems of complex manufacturing process, expensive equipment, and low production efficiency of microcapsules, and achieve the effect of increasing speed and efficiency
Inactive Publication Date: 2009-09-30
SHANGHAI JIAO TONG UNIV
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[0006] Although these methods can produce microcapsules with a particle size of about 50 μm, the production efficiency of microcapsules is low because the microcapsule emulsion particles are produced one by one, and the manufacturing process of this method is complicated and the equipment is expensive.
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Embodiment 1
[0019] The preparation process of specific embodiment is as follows:
[0020] Step 1, configure the core material emulsion and coagulant:
[0021] Configuration of sesame oil emulsion: first, the mass fraction of 100ml is 3% sodium alginate aqueous solution, then the mass fraction of 100ml is 0.2% monoglyceride, the mixed aqueous solution of 0.4% Tween-80, and then 100ml Sodium alginate aqueous solution, 100ml of mixed emulsifier solution and 100ml of water are poured into a beaker and mixed. After stirring evenly, put it in a constant temperature water bath at 50°C to 60°C. Finally, slowly add 20ml of sesame oil After the jet is added, continue to stir until uniform, stop stirring, and the resulting mixed solution is the sesame oil emulsion;
[0022] The configuration of the coagulant: a calcium chloride aqueous solution with a mass fraction of 2%;
[0023] Step 2, by the formula D = 0.34 8 ...
Embodiment 2
[0027] The preparation process is as follows:
[0028] Step 1, configure the core material emulsion and coagulant:
[0029] Seabuckthorn oil emulsion configuration: first take 100ml seabuckthorn oil, add 0.2mg vitamin E (VE) to the seabuckthorn oil, stir well, then add 2.4g emulsifier S-170 and stir well to get seabuckthorn oil emulsion ;
[0030] Coagulant configuration: First, take 100ml of water and dissolve 5mg of gum arabic into a viscous solution, then add 2.4mg of emulsifier S1570, 1mg of monoglyceride citric acid and 1mg of malt lake essence to the viscous solution, and stir until uniform , the condensate is obtained;
[0031] Step 2, by the formula D = 0.34 8 πγ ρf 2 3 Obtain the resonant frequency of the surface acoustic wave nebulizer, wherein, γ represents the surface tension of the core mater...
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Abstract
The invention relates to a preparation method for realizing the micro-encapsulation of a core material by an acoustic surface wave atomizer in the technical field of micro-encapsulation. The preparation method comprises the following steps: obtaining resonant frequency of the acoustic surface wave atomizer through formula I; placing a core material emulsion on the acoustic surface wave device, staring a pump to operate, charging hot water from a hot water inlet and discharging the hot water from a hot water outlet, starting the acoustic surface wave atomizer to work, producing atomized particles of the core material emulsion, and moving the particles in an internal tube toward the direction where the pump is positioned; and introducing the atomized particles of the core material emulsion into a flocculant, carrying out reaction, and completing the micro-encapsulation process. The method is used for atomizing the core material emulsion through the acoustic surface wave atomizer and forming a great number of core material emulsion particles once. The method can also obtain microcapsules with various particle sizes by changing the resonant frequency of the SAW atomizer; the minimal particle size of the microcapsules produced by the method reaches 50 mu m; and the method greatly improves the speed of producing the core material emulsion particles and the efficiency of producing the microcapsules.
Description
technical field [0001] The invention relates to a preparation method in the technical field of microencapsulation, in particular to a preparation method for realizing microencapsulation of a core material by using a surface acoustic wave atomizer. Background technique [0002] Since the 1950s, people began to pay attention to the realization of microcapsule preparation technology. People first used the orifice method to prepare microcapsules. However, the microcapsules prepared by this method are relatively large, generally above 500 μm. In recent years, with the rapid development of microcapsule technology, the application field is also expanding. This puts higher and higher demands on the quality of the microcapsules, especially in order to achieve a smaller apparent size of the microcapsules. Zhao Bin and others published the article "Study on the Stability of Phospholipid Microencapsulated Emulsion" in "Journal of China Cereals and Oils Science" in November 2008, Volu...
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