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  • Title: Innovative crystal transformation of dihydrate trehalose to anhydrous trehalose using ethanol.
    Author: Ohashi T, Yoshii H, Furuta T.
    Journal: Carbohydr Res; 2007 May 07; 342(6):819-25. PubMed ID: 17286968.
    Abstract:
    The crystal transformation of dihydrate trehalose to anhydrous trehalose was investigated using ethanol and a new type of crystal particle with porous structure could be obtained. The specific surface area of the anhydrous crystal transformed at 50 degrees C was 3.3 m(2)/g, with a median pore diameter of 0.21 microm, and void volume of 0.22 mL/g. The crystal transformation was monitored by measuring the crystal moisture content. The crystal transformation rates could be correlated with the Avrami equation, using the mechanism parameter n=11.5, suggesting that the change of surface area occurred during crystal transformation from dehydrate to anhydrous trehalose. The apparent activation energy of the crystal transformation was 132 kJ/mol.
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