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Sonocrystallization of Interesterified Fats with 20 and 30% C16:0 at sn-2 Position

  • Original Paper
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Journal of the American Oil Chemists' Society

Abstract

The objective of this study was to induce crystallization in enzymatically interesterified fats (IE) with 20 and 30% palmitic acid at the sn-2 position using high intensity ultrasound (HIU). The physical blends (PB) used to prepare these two IE were consisted of tripalmitin and high oleic sunflower oil and contained 13.2 and 27.1% tripalmitin, respectively. Crystallization behavior of IE was compared with PB at supercoolings of 9, 6 and 3 °C. Results show that the melting point, SFC, and crystallization rate of PB were higher than IE and were driven mainly by tripalmitin content. HIU induced crystallization and generated small crystals in the IE samples. At 9 °C supercooling, sonication did not increase the viscosity of IE C16:0 20%, while that of the IE C16:0 30% increased significantly from 192.4 ± 118.9 to 3297.7 ± 1368.6 Pa·s. The elastic modulus (G’) for IE C16:0 30% increased from 12521 ± 2739.8 to 75076.7 ± 18259 Pa upon sonication at 9 °C supercooling, while the G’ of the IE C16:0 20% did not increase. Similar behavior was observed for the other supercoolings tested. This research suggests that HIU can improve the functional properties of IE with low content of C16:0 creating more viscous and elastic materials. These fats with low C16:0 content and improved functional properties could be used as trans-free fat alternatives.

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Acknowledgements

This project was supported by Agriculture and Food Research Initiative (AFRI) Grant No. 2014-67017-21634 from the USDA National Institute of Food and Agriculture, Improving Food Quality—A1361. This project was approved by the Utah Agricultural Experiment Station as project number 8875.

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Authors and Affiliations

  1. Department of Nutrition, Dietetics and Food Science, Utah State University, 8700 Old Main Hill, Logan, UT, 84322, USA

    Jeta V. Kadamne & Silvana Martini

  2. Department of Food Science and Technology, University of Georgia, Athens, GA, 30602 , USA

    Ebenezer A. Ifeduba & Casimir C. Akoh

Authors
  1. Jeta V. Kadamne
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  2. Ebenezer A. Ifeduba
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  3. Casimir C. Akoh
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  4. Silvana Martini
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Correspondence to Silvana Martini.

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Kadamne, J.V., Ifeduba, E.A., Akoh, C.C. et al. Sonocrystallization of Interesterified Fats with 20 and 30% C16:0 at sn-2 Position. J Am Oil Chem Soc 94, 3–18 (2017). https://doi.org/10.1007/s11746-016-2914-6

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  • DOI: https://doi.org/10.1007/s11746-016-2914-6

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