
Utskrift från Malmö universitet - mau.se
Utskrift från Malmö universitet - mau.se
Publication | Article, peer reviewed scientific |
Title | Hydration and the phase diagram of acid hydrolyzed potato starch |
Author | Carlstedt, Jonas ; Wojtasz, Joanna ; Fyhr, Peter ; Kocherbitov, Vitaly |
Date | 2014 |
English abstract | |
We investigated hydration of acid hydrolyzed potato starch (maltodextrin) employing a multi-method approach. In particular, synchrotron radiation X-ray scattering and differential scanning calorimetry were used, and, for the first time, the material was investigated with sorption calorimetry and a newly developed quartz crystal microbalance with humidity scanning. The dry starch was found to be in an amorphous state. During hydration it exhibits a glass transition in both bulk and thin film samples, followed by an exothermic event where the starch crystallized. Recrystallized bulk samples displayed neither a pronounced glass transition nor crystallization upon hydration whereas both events occurred in thin film samples. The hydration-driven crystallization resulted in an X-ray pattern consistent with the coexistence of A and B type crystallites; however, at higher water concentrations only the B form occurred. The results were used to construct the first ever acid hydrolyzed starch–water phase diagram. | |
DOI | https://doi.org/10.1016/j.carbpol.2014.06.037 (link to publisher's fulltext.) |
Publisher | Elsevier |
Host/Issue | Carbohydrate Polymers; |
Volume | 112 |
ISSN | 0144-8617 |
Pages | 9 |
Page | 569-577 |
Language | eng (iso) |
Subject | Glass transition Crystallization Sorption calorimetry QCM-D X-ray scattering DSC Sciences Research Subject Categories::NATURAL SCIENCES |
Handle | http://hdl.handle.net/2043/18367 Permalink to this page |
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