Hydration-induced crystalline transformation of starch polymer under ambient conditions

Qiao, Dongling, Zhang, Binjia, Huang, Jing, Xie, Fengwei, Wang, David K., Jiang, Fatang, Zhao, Siming and Zhu, Jie (2017) Hydration-induced crystalline transformation of starch polymer under ambient conditions. International Journal of Biological Macromolecules, 103 152-157. doi:10.1016/j.ijbiomac.2017.05.008

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Author Qiao, Dongling
Zhang, Binjia
Huang, Jing
Xie, Fengwei
Wang, David K.
Jiang, Fatang
Zhao, Siming
Zhu, Jie
Title Hydration-induced crystalline transformation of starch polymer under ambient conditions
Journal name International Journal of Biological Macromolecules   Check publisher's open access policy
ISSN 1879-0003
Publication date 2017-10-01
Year available 2017
Sub-type Article (original research)
DOI 10.1016/j.ijbiomac.2017.05.008
Open Access Status File (Author Post-print)
Volume 103
Start page 152
End page 157
Total pages 6
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV
Language eng
Subject 1315 Structural Biology
1303 Biochemistry
1312 Molecular Biology
Abstract With synchrotron small/wide-angle X-ray scattering (SAXS/WAXS), we revealed that post-harvest hydration at ambient conditions can further alter the starch crystalline structure. The hydration process induced the alignment of starch helices into crystalline lamellae, irrespective of the starch type (A- or B-). In this process, non-crystalline helices were probably packed with water molecules to form new crystal units, thereby enhancing the overall concentration of starch crystallinity. In particular, a fraction of the monoclinic crystal units of the A-type starches encapsulated water molecules during hydration, leading to the outward movement of starch helices. Such movement resulted in the transformation of monoclinic units into hexagonal units, which was associated with the B-type crystallites. Hence, the hydration under ambient conditions could enhance the B-polymorphic features for both A-type and B-type starches. The new knowledge obtained here may guide the design of biopolymer-based liquid crystal materials with controlled lattice regularity and demanded features.
Keyword Crystalline structure
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID 31401586
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
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