Abstract
양이온성 계면활성제인 TTAB(tetradecyltrimethylammonium bromide)의 수용액에서 dichlorophenol 이성질체들의 가용화현상을 UV/Vis 분광광도법을 이용하여 연구하였다. 온도의 변화에 따른 가용화상수값(<TEX>$K_s$</TEX>)의 변화를 측정함으로써 열역학적으로 분석하였으며, 그 결과 모든 이성질체들의 가용화에 대한 <TEX>${\Delta}Go^{\circ}_s$</TEX>와 <TEX>${\Delta}H^{\circ}_s$</TEX> 값은 측정한 범위 내에서 모두 음의 값을 나타내었다. 또한 dichlorophenol 이성질체들의 가용화현상에 미치는 n-부탄올과 NaCl의 효과에 대하여 조사하였다. 이러한 첨가제는 <TEX>$K_s$</TEX>와 CMC 값을 동시에 큰 폭으로 변하게 하였으며, 그런 결과로부터 각 dichlorophenol 이성질체들이 미셀 내에서 가용화되는 위치를 예측할 수 있었다. The interaction of dichlorophenol isomers with the micellar system of TTAB (tetradecyltrimethylammonium bromide) was studied by the UV/Vis spectrophotometric method. The solubilization constants (<TEX>$K_s$</TEX>) of dichlorophenol isomers into the micellar system have been measured with the change of temperature and the various thermodynamic parameters have been calculated and analyzed from these changes. The results show that the values of <TEX>${\Delta}G^{\circ}_s$</TEX> and <TEX>${\Delta}H^{\circ}_s$</TEX> are all negative within the measured temperature range. The effects of additives (n-butanol and NaCl) on the solubilization of dichlorophenol isomers have been also measured. There was a great change on the values of <TEX>$K_s$</TEX> and CMC simultaneously with these additives. From these changes we can postulate the solubilization sites of each isomers in the micellar system of TTAB.
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