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마이크로에멀젼에서 리파아제 촉매에 의한 고급지방산 모노글리세리드의 생성에 있어 최적효과
노윤찬,남기대,김진탁,조경행 ( Yoon Chan Ro,Ki Dae Nam,Jin Tak Kim,Kyung Haeng Jo ) 한국공업화학회 1994 공업화학 Vol.5 No.2
N/A Mono alkyl glycerides have bean obtained in good yield by enzyme catalyst from soybean oil. The reaction was carried out in an oil rich microemulsion formula. Best results were obtained with sodium bis(2-ethyl hexyl) sulfo succinate(AOT), isooctane as hydrocarbon component and buffer of pH 7. The enzyme used was a 1, 3-specific lipase which leaves the 2-position intact. However, the 2-monoglyceride formed slowly undergoes long chain acyl migration to 1-mono-glyceride. Optimal reaction time at 35℃ reaction temperature was found to be three hour.
조경행,김태영,김성웅,정노희,남기대 ( Kyung Haeng Jo,Tae Young Kim,Seong Ung Kim,No Hee Jeong,Ki Dae Nam ) 한국공업화학회 1994 공업화학 Vol.5 No.1
비이온성 계면활성제인 5종의 모노글리세릴 피로글루타메이트류는 초산나트륨 촉매하에 피로글루탐산과 모노글리세리드를 에스테르 반응시켜 높은 수율로 제조하였다. IR, ^1H-NMR로 그들의 구조를 확인하였고 계면장력, 유화력을 측정하였다. 반응 생성물들의 오일용액에서의 물에 대한 계면장력은 5∼9dyne/㎝까지 저하되었고, 계면장력 저하능은 모노글리세리드 피로글루탐산 에스테르의 소수성 탄소부에 의존된다. 벤젠 및 대두유에서의 유화력을 측정한 결과 대두유보다 벤젠의 유화력이 우수하였으며 유화제로서의 응용이 기대된다. Nonionic surfactants, monoglyceryl pyroglutamates, have been synthesized in a high yield by esterification of monoglyceride with pyroglutamic acid in the presence of sodium acetate catalyst. Their structures were confirmed by IR and ^1H-NMR studies. For these compounds, surface active properties including interfacial tension and emulsifying power were measured. The interfacial tensions of their oil solution against water were decreased to 5∼9dyne/㎝ and the tendency of lowering the interfacial tension was depending on the increase of carbon atom number in the hydrophobic alkyl chain of monoglyceryl pyroglutamates. The experimental results indicated that emulsifying power of the nonionic surfactant was better in benzene than in soybean oil. Due to the good surface properties, the nonionic surfactants, monoglyceryl pyroglutamates, are expected to be used as emulsifiers.