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Structure and Physical Properties of Organogels Developed by Sitosterol and Lecithin with Sunflower Oil

  • Original Paper
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Journal of the American Oil Chemists' Society

Abstract

High linoleic acid sunflower oil (HLSO) with various sitosterol (Sit) to lecithin (Lec) mass ratios (i.e., 0:100–100:0) were used to develop organogels at two storage temperatures (T s: 5 and 25 °C). The results showed that, at 25 °C, the hardness value of organogels obtained from HLSO with both Sit and Lec was higher than that of organogels developed from HLSO with only Sit or Lec. Microscopy revealed that the shapes of the crystals in the organogels varied significantly with the composition of the structurant and the T s. At both T s used, the Sit:Lec (80:20) system had a lower degree of supersaturation compared with the (100:0) system. X-ray diffraction (XRD) revealed that Sit:Lec mass ratio of 70:30, 80:20 and 100:0 had similar short spacings, and the presence of Lec might be adverse to the formation of Sit crystal in oil. Small-angel X-ray scattering (SAXS) showed that the layer thickness of Sit/Lec/HLSO organogel was larger than that of Sit/HLSO organogel. It was found that the presence of Lec induced the change of self-assembly structure of Sit in HLSO and caused the changes of physical properties of organogels obtained.

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Acknowledgments

We would like to gratefully thank the financial support from the National Natural Science Foundation of China (Project No. 31130042; No. 31271885 and No. 31271884), Key Projects in the National Science & Technology Pillar Program during the Twelfth Five-year Plan Period (Project No. 2012BAD37B01), National Hi-tech Research and Development Project (863-SS2013AA102103) and Public Welfare (Agriculture) Research Project (201303072).

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Authors and Affiliations

  1. College of Light Industry and Food Sciences, South China University of Technology, Guangzhou, 510640, China

    Lijuan Han, Lin Li, Bing Li, Guo-qin Liu & Xinqi Liu

  2. College of Food Sciences, South China Agricultural University, Guangzhou, 510642, China

    Lei Zhao

  3. College of Food Science and Technology, Henan University of Technology, Zhengzhou, 450001, China

    Xuede Wang

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  1. Lijuan Han
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  2. Lin Li
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  3. Bing Li
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  5. Guo-qin Liu
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  6. Xinqi Liu
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  7. Xuede Wang
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Correspondence to Guo-qin Liu.

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Han, L., Li, L., Li, B. et al. Structure and Physical Properties of Organogels Developed by Sitosterol and Lecithin with Sunflower Oil. J Am Oil Chem Soc 91, 1783–1792 (2014). https://doi.org/10.1007/s11746-014-2526-y

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  • DOI: https://doi.org/10.1007/s11746-014-2526-y

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