The thermotropic phase behavior of ascorbyl palmitate : an infrared spectroscopic study

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DOIResolve DOI: http://doi.org/10.1139/v81-366
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TypeArticle
Journal titleCanadian Journal of Chemistry
ISSN0008-4042
1480-3291
Volume59
Issue16
Pages25432549
AbstractThe infrared spectra of aqueous potassium ascorbyl palmitate were studied as a function of temperature using Fourier transform infrared techniques. From a light scattering experiment the Krafft point of 0.1 M potassium ascorbyl palmitate was determined to be 48 °C. The temperature-induced changes in infrared spectral parameters such as frequency and bandwidth characterize this Krafft point as a phase transition from a conformationally ordered, poorly hydrated solid phase, to an isotropic micellar phase. The phase transition of this "pseudosoap" occurs over a temperature range of about 10 °C, reflecting the progressive hydration of the solid upon micellization, a behavior typical of surfactants such as soaps.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada
Peer reviewedYes
NRC number19405
NPARC number23001399
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Record identifier472e3733-3f21-4b71-a1d6-a5d6feaa523a
Record created2017-02-02
Record modified2017-02-02
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