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Surface Melting in Alkane Emulsion Droplets as Affected by Surfactant Type
- Article from:
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JAOCS, Journal of the American Oil Chemists' Society
- Article date:
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May 1, 2008
- Author:
- GÃ; ¼; lseren, Ibrahim; Coupland, John N
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Copyright informationCopyright AOCS Press May 2008. Provided by ProQuest LLC. (Hide copyright information)
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Abstract
The influence of surfactant type (Tween 20, Tween 40, Tween 60, Tween 80, Brij 58, Triton X-100, SDS, STS) on the crystallization and melting characteristics of emulsified (mean droplet diameter 0.52 µm) n-octadecane and n-eicosane were studied using microcalorimetry. The melting point (~37 °C) of the eicosane droplets was higher than the crystallization point (~24 °C) and was not affected by the surfactant selected. There was a similar separation between the crystallization (~14 °C) and melting (~28 °C) point of the emulsified octadecane however the details of the transitions was affected by the surfactant selected. For Tween 40 and Brij 58-stabilized droplets there was a ...