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Rice bran super critical CO2 extract micro particle preparation using an aerosol solvent extraction system and particles from gas-saturated solution processes

Jae-Suk Choi, Myong-Kyun Roh,Tae-Uk Kim,Woi-Sook Moon, Mi-Ryung Kim

To improve the solubility of rice bran supercritical CO2 extract (RBSCE) in water, RB-SCE microparticles were successfully prepared using a mixing process involving an aerosol solvent extraction system (ASES) and particles from a gas-saturated solution (PGSS). To improve the microparticle formation efficiency, RB-SCE, a sodium-caseinate saturated aqueous solution, and ethanol (as a co-solvent) (1:3:10 wt%) were used as raw materials, with supercritical CO2 as the anti-solvent. The particle size distribution of the RB-SCE microparticles ranged from 1.25 to 346.15 ìm; the median value of the particle size distribution and the mean particle size of the RB-SCE microparticles were 266.42 and 250.12 ìm, respectively. 5% RB-SCE microparticles were stably dissolved in a test tonic product. Thus, RB-SCE microparticles prepared by a mixture process using an ASES and a PGSS can be used in the food industry and for cosmetic product applications.