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Dispersion states of lecithin–soybean oil mixtures in water

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Abstract

We have investigated the dispersion state in aqueous solutions of lecithin–soybean oil mixtures in a wide range of mixing ratios, by small angle X-ray scattering as well as static and dynamic light scattering. While lecithin is dispersed as uni- and multi-lamellar vesicles in water, the uni-lamellar vesicle coexists with the spherical swollen micelle in the aqueous solution of the lecithin–soybean oil mixture with the weight fraction ξO of the soybean oil in the mixture = 0.5. In the aqueous solution, soybean oil is included in the hydrophobic layer of the vesicle and the hydrophobic core of the micelle. When ξO exceeds 0.5, the only spherical swollen micelle exists in the aqueous solution.

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Acknowledgements

We thank Dr. K. Terao and Miss. Mai Hagiwara at Osaka University for helping SAXS measurements. The SAXS data was acquired at the BL40B2 beamline in SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal No. 2019B1375 and 2020A0750).

Funding

This work was supported in part by JSPS KAKENHI Grant No. 18H02020.

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Authors and Affiliations

  1. Department of Macromolecular Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka, 560-0043, Japan

    Kenzo Yamada, Kaoru Yagishita & Takahiro Sato

  2. Pharmaceutical Technology Department, Otsuka Pharmaceutical Factory, Inc, 115, Aza Kuguhara, Tateiwa, Muya-cho, Naruto, Tokushima, 772-8601, Japan

    Kenzo Yamada

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  1. Kenzo Yamada
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Correspondence to Takahiro Sato.

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Yamada, K., Yagishita, K. & Sato, T. Dispersion states of lecithin–soybean oil mixtures in water. Colloid Polym Sci 300, 95–102 (2022). https://doi.org/10.1007/s00396-021-04932-4

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  • DOI: https://doi.org/10.1007/s00396-021-04932-4

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