Journal
CARBOHYDRATE POLYMERS
Volume 66, Issue 3, Pages 306-315Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2006.03.019
Keywords
amylose complexes; V types; decanoic acid; hexanoic acid; 1,5-decanolactone; Fourier transform-infrared spectroscopy; wide angle X-ray scattering; acid hydrolysis; stoichiometry; delta decalactone
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Amylose V complexes were prepared as semi-crystalline powders from aqueous solution with three different molecules: decanoic acid, hexanoic acid, and 1,5-decanolactone. Structure and stoichiometry of the resulting amylose complexes were investigated. As evidenced by Wide Angle X-ray Scattering (WARS), the aroma compounds lead to three different types of V amylose structure similar to V-h, V-butanol and V-isopropanol, respectively. Extraction of aroma when included between helices, induced some polymorphic transitions towards a structure with smaller unit cells (i.e., from V-isopropanol to V-bntanol and from V-butanol to V-h). The location of the ligand within and/or between helices was deduced. Its content in amorphous and crystalline areas was also investigated using FT-IR spectroscopy, WAXS, and mild acid hydrolysis. (c) 2006 Elsevier Ltd. All rights reserved.
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