해양환경안전학회지 Vol.14 No.2 (p.145-148)

유처리제용 양이온 계면찰성제의 임계미셀농토에서 온도의 효과

The Effect of Temperature on the Critical Micelle Concentration of Cationic Surfactant for Chemical Dispersants
키워드 :
옥타데실 피리디늄 브로마이드,임계미셀농도,열역학적 성질,다항식,화학분산제,N-Octadecyl pyridinium bromide,Critical bicelle concentration,Thermodynamic quantities,Polynominal equation,Chemical dispersants

초록

화장품과 유처리제 등에 응용할 수 있는 양이온 계면활성제인 N-octadecyl pyridinium bromide를 사용하여 온도 40~60℃ 범위에서 적하법을 이용한 임계미셀농도를 적용 미셀형성에 따른 열역학적 특성(자유에너지, 엔탈피, 엔트로피, 열용량)을 조사하였다. 그 결과 자유에너지 변화는 온도가 증가함에 따라 감소함을 알 수 있었다.
Cationic surfactant can be used as cosmetics and chemical dispersants. The variation of critical micelle concentration (CMC) with temperature over the range 40℃ to 60℃ for N-octadecyl pyridinium bromide was measured by drop methods. Thermodynamic quantities such as free energy, enthalpy, entropy and heat capacity for micellization of N-octadecyl pyridinium bromide in water were calculated by fourth-degree polynominal equation In the result, free energy change was decreased generally by the increment of temperature.