Comparison of sodium dodecylsulfate apparent molar volumes and micellar aggregation numbers

  • Sz. Vass Török
  • Gy. Jákli
  • E. Berecz
Amphiphile Solutions
Part of the Progress in Colloid & Polymer Science book series (PROGCOLLOID, volume 76)


The apparent molar volume of sodium dodecylsulfate (SDS) was determined vs. surfactant concentration in normal and 99.85 % heavy water solutions at 25 °C up to 0.8 mol/dm3. The apparent molar volume data in normal water were found to be systematically greater than those in heavy water. The apparent volume of aggregated SDS molecules v was found to be constant; in normal water for SDS concentrations greater than 0.04 mol/dm3, v=(4.1472 ± 0.0049) · 10−22 cm3, indicating no change in the intermolecular forces inside SDS micelles of increasing size.

Key words

Sodium dodecylsulfate apparent molar volume micellar aggregation numbers normal and heavy water aggregate molecules 


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Copyright information

© Dr. Dietrich Steinkopff Verlag GmbH & Co. KG 1988

Authors and Affiliations

  • Sz. Vass Török
    • 1
    • 2
  • Gy. Jákli
    • 2
  • E. Berecz
    • 1
    • 2
  1. 1.Technical University of Heavy IndustryMiskolc-EgyetemvárosHungary
  2. 2.Central Research Institute for PhysicsHungarian Academy of SciencesBudapestHungary

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