화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Applied Chemistry for Engineering, Vol.29, No.5, 620-625, October, 2018
DOI10.14478/ace.2018.1081  Export Citation
소듐 라우릴 에톡시 설페이트(SLES) 베이스 액체세정제의 겔링성 및 겔링방지 특성에 대한 연구
Study on the Gelling Formation and Anti-gelling Properties of Liquid Detergent Based on Sodium Lauryl Ethoxy Sulfate (SLES)
지경엽†
  • 대구한의대학교 바이오산업융합학부
Gyeong-Yup Chi†
  • Natural material fermentation for Cosmetic Laboratory, Division of Bio-Technology and Convergence, Daegu Haany University, Gyeongsan-si, Gyeongsangbuk-do 38610, Korea
E-mail:
초록
SLES를 주성분으로 사용한 액체세정제는 공기 중에 노출하여 방치하는 경우 표면에 피막이 형성되는 경우가 있다. 이는 제형 중의 수분이 증발하면서 세정제 주성분인 계면활성제의 농도변화로 인한 미셀의 상변화로 판단된다. SLES는 30~60% 영역에서 강한 육방정계 액정상이 나타나고, 60% 이상에서는 라멜라 액정상을 보인다. 본 연구에서는 SLES 주성분으로 사용된 액체세정제의 표면 겔링 현상은 내용물에서 수분 증발로 인하여 발생하는 현상이다. 액체세정제에서 수분이 증발되면서 계면활성제의 농도가 높아지는 결과였다. 표면 겔링 상태는 편광현미경으로 관찰한 결과 혼합 계면활성제 시스템의 액정상으로 확인되었다. 결론적으로 SLES를 주성분으로 사용하는 처방에서 겔링 필름 형성을 방지하기 위하여 수용성이 좋은 AOS를 증량하고 액정형성을 방지할 수 있는 이차 계면활성제인 SAS를 도입하고, 하이드로트로프로 SXS와 PEG1500을 적용하였다. 이와 같이 개선된 액체세정제 처방4와 5는 공기 중에 노출되어도 표면에 피막이 형성되는 겔링현상을 방지할 수 있었다.
Liquid detergent based on sodium lauryl ethoxy sulfate (SLES) as main ingredient sometimes met gelling film on the surface when it is opened in the air. It was assumed because of the change of phase diagram of micelle by concentration change of surfactant, major ingredient of detergent when the water of detergent is evaporated. SLES showed strong hexagonal liquid crystal (LC) in 30~60 wt%, and lamellar LC over 60 wt%. In this research surface gelling formation of liquid detergent which is based on SLES as main ingredient was because of water evaporation. As water of detergent was evaporated, concentration of surfactant became higher. It was checked that surface gelling was LC of mixed surfactant system. Conclusionally we applied alpha olefin sulfonate (AOS) having good solubility, Sodium secondary alkane sulfonate (SAS) preventing hexagonal LC and hydrotrope sodium xylene sulfonate (SXS) and PEG1500 in order to prevent gelling film in SLES based liquid detergent. Like this, improved formula 4 and 5 can prevent the formation of gelling film on the surface of liquid detergent when it is opened in the air.
Keywords:SLES;gelling formation;anti-gelling;liquid detergent;liquid crystal
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