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On the Plasticization Process of Potato Starch: Preparation and Characterization

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Abstract

This study aimed to gain a deep understanding of the preparation mechanism of the thermoplastic potato starch (TPPS) by using melt-mixing as a production method, to pursue the changes occurred on the microstructure, morphology and thermal properties of potato starch, TPPS was prepared using a mixture of potato starch with glycerol and water as plasticizer in an internal mixer. The steps of the phase transition, happening by applying harsh conditions (60 rpm, 160 °C, and 7 min), were followed by monitoring the evolution of torque during the mixing time. It was shown that the granules structure was destroyed and a new phase was formed. This was proved by SEM which gave the evidence that the morphology of the TPPS was homogeneous with the smooth surface means that the mixing conditions used in this work were good enough to obtain the thermoplastic starch with a high level of homogeneity in all dimensions. FTIR analysis allowed deducing the formation of new H-bonds between the starch and plasticizers molecules instead of intra and intermolecular H-bonds in the native starch that was destructed through the melt-mixing process., These caused starch chains gain mobility and as the results decreasing in crystallinity, where the XRD analysis exhibited that the crystallinity decreased from 14.5% resulting from B-type in native potato starch to 9% resulting from B-type and VH-type in TPPS. TGA and DSC analysis proved a decreasing in the thermal stability in the TPPS as compared to the starch granules.

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Authors and Affiliations

  1. Physics Department, Higher Institute for Applied Sciences and Technology (HIAST), Po. Box 31983, Damascus, Syria

    Mhd. Mazen Altayan

  2. Environmental Research Laboratory (ERL), Higher Institute for Applied Sciences and Technology (HIAST), Po. Box 31983, Damascus, Syria

    Tammam Al Darouich

  3. Department of Chemistry, Damascus University, Damascus, Syria

    Francois Karabet

Authors
  1. Mhd. Mazen Altayan
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  2. Tammam Al Darouich
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  3. Francois Karabet
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Correspondence to Mhd. Mazen Altayan.

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Altayan, M.M., Al Darouich, T. & Karabet, F. On the Plasticization Process of Potato Starch: Preparation and Characterization. Food Biophysics 12, 397–403 (2017). https://doi.org/10.1007/s11483-017-9495-2

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  • DOI: https://doi.org/10.1007/s11483-017-9495-2

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