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Binary phase behavior of 1,3-distearoyl-2-oleoyl-sn-glycerol (SOS) and 1,3-distearoyl-2-linoleoyl-sn-glycerol (SLS)

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Journal of the American Oil Chemists' Society

Abstract

The binary phase behavior of SOS (1,3-distearoyl-2-oleoyl-sn-glycerol) and SLS (1,3-distearoyl-2-linoleoyl-sn-glycerol) was examined by using DSC and conventional and synchrotron radiation X-ray diffraction. The solid-solution phases were observed in the metastable α and γ forms in all concentration ranges. Results indicated that the miscible γ form did not transform to the β′ form when the mixtures were subjected to simple cooling from a high-temperature liquid to a low-temperature solid phase. However, and α-melt-mediated transformation into β′ and β2 resulted in the formation of immiscible phases in concentration ranges of SLS below 30%. By contrast, at SLS concentration ranges above 30%, the α-melt-mediated transformation caused crystallization of only the γ form, and β′ and β2 crystals did not appear. These results show that the specific interactions between SOS and SLS are operative in the phase behavior of the mixture states of SOS and SLS.

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Authors and Affiliations

  1. Faculty of Applied Biological Science, Hiroshima University, 739-8528, Higashi-Hiroshima, Japan

    M. Takeuchi, S. Ueno & K. Sato

  2. Vlaardingen Laboratory, Unilever Research, 3133 AT, Vlaardingen, The Netherlands

    E. Flöter

Authors
  1. M. Takeuchi
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  2. S. Ueno
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  3. E. Flöter
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  4. K. Sato
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Correspondence to K. Sato.

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Takeuchi, M., Ueno, S., Flöter, E. et al. Binary phase behavior of 1,3-distearoyl-2-oleoyl-sn-glycerol (SOS) and 1,3-distearoyl-2-linoleoyl-sn-glycerol (SLS). J Amer Oil Chem Soc 79, 627–632 (2002). https://doi.org/10.1007/s11746-002-0535-1

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  • DOI: https://doi.org/10.1007/s11746-002-0535-1

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