화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Applied Chemistry for Engineering, Vol.29, No.5, 524-532, October, 2018
DOI10.14478/ace.2018.1044  Export Citation
코코넛 오일로부터 유래된 아미노산계 음이온 계면활성제의 합성 및 계면 특성 연구
Synthesis of Amino Acid-based Anionic Surfactants from Coconut Oil and Characterization of Interfacial Properties
예다난, 조선희, 임종주†
  • 동국대학교 서울 공과대학 화공생물공학과
DaNan Yea, SeonHui Jo, and JongChoo Lim†
  • Department of Chemical and Biochemical Engineering, Dongguk University, 30, Pildong-ro 1-gil, Jung-gu, Seoul, South of Korea
E-mail:
초록
본 연구에서는 천연 유래의 코코넛 오일을 원료로 사용하여 2종류의 아미노산계 음이온 생체계면활성제 포타슘 코코일 글루타메이트(potassium cocoyl glutamate, CTK)와 소듐 코코일 글루타메이트(sodium cocoyl glutamate, CTN)를 합성 하였으며, 합성한 계면활성제의 구조를 FT-IR, 1H-NMR 및 13C-NMR 분석을 통하여 규명하였다. 합성한 계면활성제에 대하여 정적 및 동적 표면장력과 유화력 등의 계면 물성을 측정한 결과, CTK와 CTN 모두 계면 활성이 우수하고 계면에너지를 낮추는데 효과적임을 알 수 있었다. 특히, CTK 계면활성제가 CTN 계면활성제와 비교하여 계면 에너지를 낮추는데 보다 효과적이었는데 이는 CTK가 소수성이 더 크고 계면활성제 단분자가 벌크 용액으로부터 공기와 수용액의 계면으로 이동하는 속도가 빨라서 공기와 수용액의 계면이 계면활성제 단분자에 의하여 더 짧은 시간에 포화되기 때문임을 알 수 있었으며, 생활용품이나 화장품 제조에 적용될 수 있을 것으로 기대된다.
In this study, two types of amino acids-based anionic biosurfactants such as potassium cocoyl glutamate (CTK) and sodium cocoyl glutamate (CTN) were synthesized from coconut oils and the structure elucidation of CTK and CTN was carried out by using FT-IR, 1H-NMR and 13C-NMR spectrophotometries. Measurements of interfacial properties such as static and dynamic surface tensions and emulsification activity showed that both CTK and CTN were surface-active and effective in lowering the interfacial free energy. In particular, the CTK surfactant was found to be more efficient in reducing the interfacial free energy since the larger number of CTK molecules was preferentially adsorbed at the air-water interface due to the higher hydrophobicity and larger mobility of CTK than those of using CTN, indicating possible uses in cosmetics and household products formulation.
Keywords:Amino Acid Based Anionic Biosurfactant;Eco-Friendly;Coconut Oil;Interfacial Property
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