Effects of Processing Parameters on Ethyl Cellulose Microencapsulation Using Supercritical CO2 Antisolvent Precipitation

Abstract

Abstract: Microencapsulation of ethyl cellulose was obtained from a solution of ethyl cellulose in acetone using the supercriticalCO2 antisolvent precipitation (SAS). The effects of temperature, pressure, liquid solution concentration, and stirring rate on thephysical characteristics of ethyl cellulose microencapsulations were studied. The mean diameters of the microencapsulationranging between 2.66 and 9.49μm could be obtained. The particle size increase and the particle size distributions enlargementwith the increasing of temperature and solution concentration were found. The particle size decrease and the particle sizedistributions reduction with increasing of pressure and stirring rate were also observed.

Key words: supercritical CO2 antisolvent precipitation, ethyl cellulose, microencapsulation

ZHANG Yan, CHEN Lan, LI Bao-Guo, HUA Ze-Zhao, WU Yi-Wen, LIU Zhe-Peng, LU Wei-Yue. Effects of Processing Parameters on Ethyl Cellulose Microencapsulation Using Supercritical CO2 Antisolvent Precipitation[J]. FOOD SCIENCE, 2004, 25(2): 96-99.

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Effects of Processing Parameters on Ethyl Cellulose Microencapsulation Using Supercritical CO2 Antisolvent Precipitation

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