Characterization of the Physical State of Spray-Dried Inulin |
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Authors: | Sébastien N Ronkart Claude Deroanne Michel Paquot Christian Fougnies Jean-Christophe Lambrechts Christophe S Blecker |
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Institution: | (1) Department of Food Technology, Gembloux Agricultural University, Passage des Déportés, 2, 5030 Gembloux, Belgium;(2) Department of Industrial Biological Chemistry, Gembloux Agricultural University, Passage des Déportés, 2, 5030 Gembloux, Belgium;(3) Cosucra Groupe Warcoing S.A., Rue de la sucrerie, 1, 7740 Warcoing, Belgium;(4) CERTECH, Analytical Sciences—Microscopy, Rue Jules Bordet, 1, 7180 Seneffe, Belgium |
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Abstract: | Modulated differential scanning calorimetry, wide angle x-ray scattering, and environmental scanning electron microscopy were
used to investigate the physical and morphological properties of chicory root inulin spray dried under different conditions.
When the feed temperature increased up to 80 °C, the average degree of polymerization of the solubilized fraction increased,
leading to a higher glass transition temperature (Tg). Above 80 °C, the samples were completely amorphous, and the Tg did
not change. The starting material was semicrystalline, and the melting region was composed of a dual endotherm; the first
peak subsided as the feed temperature increased up to a temperature of 70 °C, whereas above 80 °C, no melting peak was observed
as the samples were completely amorphous. To a lesser extent, the inlet air temperature of 230 °C allowed a higher amorphous
content of the samples than at 120–170 °C but induced a blow-out of the particles. |
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Keywords: | Inulin Spray drying Glass transition MDSC WAXS ESEM |
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