【摘要】 利用超临界CO2抗溶剂法从乙基纤维素和丙酮溶液中制得了乙基纤维素微囊,考察了温度、压力、溶液浓度和搅拌速度等工艺参数对物性的影响,试验结果表明:超临界CO2抗溶剂法可用于食品材料的微囊制粒,所得乙基纤维素微囊的粒径在2.66～9.49μm之间;随着温度和溶液浓度的增加,颗粒粒径及其粒径分布增加;随着压力和搅拌速度的增加,颗粒粒径及其粒径分布减小。更多还原

【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.更多还原