초임계 CO2 유체 추출법으로 얻은 탈지 유채박 중 표면활성 물질의 유화 성질 연구 (Emulsifying Properties of Surface-Active Substances from Defatted Rapeseed Cake by Supercritical Carbon Dioxide Extraction)

서지정보

· 발행기관 : 한국응용과학기술학회
· 수록지 정보 : 한국응용과학기술학회지 / 30권 / 4호 / 635 ~ 649페이지
· 저자명 : 김정원, 정용선, 이의석, 길나영, 김산성, 김현효, 김태영, 이영화, 장영석, 이기택, 홍순택

초록

This study was carried out to investigate the emulsifying properties of surface-active substances from defatted rapeseed cake by supercritical CO2 extraction. Based on the interfacial tension data, a supercritical fluid extract (SFE) with the lowest value of 14.16 mN/m was chosen for evaluation which was obtained from No. 2 extraction condition (150 bar, 65℃, 250 g). For emulsions with SFE, some physicochemical properties (i.e., fat globule size, creaming stability, zeta potential etc) were investigated according to changes in SFE concentration, pH, and NaCl addition in an emulsion. It was found that fat globule size was decreased with increasing SFE concentration in emulsion, with showing a critical value at 0.5 wt%, thereby resulting in less susceptibility to creaming behavior. The SFE emulsion also showed instability at acidic conditions (pH<7.0) as well as by NaCl addition. This was coincided with zeta potential data of emulsion. In addition, SSL (sodium stearoyl lactylate) found to be suitable as a co-surfactant, as it helped considerably in decreasing fat globule size in emulsions and its optimum concentration to be over 0.03 wt%, based on 0.1 wt% SFE in emulsion.

영어초록

This study was carried out to investigate the emulsifying properties of surface-active substances from defatted rapeseed cake by supercritical CO2 extraction. Based on the interfacial tension data, a supercritical fluid extract (SFE) with the lowest value of 14.16 mN/m was chosen for evaluation which was obtained from No. 2 extraction condition (150 bar, 65℃, 250 g). For emulsions with SFE, some physicochemical properties (i.e., fat globule size, creaming stability, zeta potential etc) were investigated according to changes in SFE concentration, pH, and NaCl addition in an emulsion. It was found that fat globule size was decreased with increasing SFE concentration in emulsion, with showing a critical value at 0.5 wt%, thereby resulting in less susceptibility to creaming behavior. The SFE emulsion also showed instability at acidic conditions (pH<7.0) as well as by NaCl addition. This was coincided with zeta potential data of emulsion. In addition, SSL (sodium stearoyl lactylate) found to be suitable as a co-surfactant, as it helped considerably in decreasing fat globule size in emulsions and its optimum concentration to be over 0.03 wt%, based on 0.1 wt% SFE in emulsion.

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