Thermodynamics of sodium dodecyl sulphate (SDS) micellization in the presence of some biologically relevant pH buffers

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• 作者：Joanna Makowska ; Dariusz Wyrzykowski…
• 关键词：Isothermal titration calorimetry ; DSC ; Conductometric titration ; Surfactants ; CMC ; Micellization
• 刊名：Journal of Thermal Analysis and Calorimetry
• 出版年：2015
• 出版时间：July 2015
• 年：2015
• 卷：121
• 期：1
• 页码：257-261
• 全文大小：611 KB
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• 作者单位：Joanna Makowska (1)
  Dariusz Wyrzykowski (1)
  Bogus?aw Pilarski (2)
  Lech Chmurzyński (1)
  
  1. University of Gdańsk, Wita Stwosza 63, 80-308, Gdańsk, Poland
  2. Cerko Sp. z o.o. Sp.K, Al. Zwyci?stwa 96/98, 81-451, Gdynia, Poland
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Sciences
  Polymer Sciences
  Physical Chemistry
  Inorganic Chemistry
  Measurement Science and Instrumentation
  
• 出版者：Akad茅miai Kiad贸, co-published with Springer Science+Business Media B.V., Formerly Kluwer Academic
• ISSN：1572-8943

文摘

Three complementary experimental techniques: isothermal titration calorimetry, differential scanning calorimetry and conductometric titration, have successfully been applied to describe the process of sodium dodecyl sulphate (SDS) micellization in the presence of pH buffering substances, namely 2-(N-morpholino)ethanesulfonic acid, piperazine-N,N-bis(2-ethanesulfonic acid), 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid and 3-(N-morpholino)propanesulfonic acid, commonly used in biological experiments as well as in calorimetric studies. The measurements were taken in aqueous solutions (pH 6.5), at 298.15?K. The influence of the buffer components as well as the composition of the system under study on the critical micelle concentration, the molar standard enthalpy for micelle formation (Δmic H 0) and the molar heat capacity that corresponds to the thermal midpoint (T m) of micelle transition has been discussed. It has been shown that the dependence of SDS stability on the kind of buffer may be helpful for the precise interpretation of the molecular recognition processes.