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Hydration-induced crystalline transformation of starch polymer under ambient conditions

Lookup NU author(s): Professor David XieORCiD

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).


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.


Publication metadata

Author(s): Qiao D, Zhang B, Huang J, Xie F, Wang DK, Jiang F, Zhao S, Zhu J

Publication type: Article

Publication status: Published

Journal: International Journal of Biological Macromolecules

Year: 2017

Volume: 103

Pages: 152-157

Print publication date: 01/10/2017

Online publication date: 02/05/2017

Acceptance date: 02/05/2017

Date deposited: 31/08/2023

ISSN (print): 0141-8130

ISSN (electronic): 1879-0003

Publisher: Elsevier

URL: https://doi.org/10.1016/j.ijbiomac.2017.05.008

DOI: 10.1016/j.ijbiomac.2017.05.008


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Funding

Funder referenceFunder name
201602
2016CFB142
2662016QD008
31401586
BSQD2016024
Doctoral Startup Foundation from Hubei University of Technology
Fundamental Research Funds for the Central Universities
Hubei Provincial Natural Science Foundation of China
National Natural Science Foundation of China
Open Project Program of Provincial Key Laboratory of Green Processing Technology and Product Safety of Natural Products

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