Hydration-induced crystalline transformation of starch polymer under ambient conditions

Dongling Qiao; Binjia Zhang; Jing Huang; Fengwei Xie; David K. Wang; Fatang Jiang; Siming Zhao; Jie Zhu

doi:10.1016/j.ijbiomac.2017.05.008

Hydration-induced crystalline transformation of starch polymer under ambient conditions

Dongling Qiao, Binjia Zhang, Jing Huang, Fengwei Xie, David K. Wang, Fatang Jiang, Siming Zhao, Jie Zhu

Research output: Contribution to journal › Article › peer-review

29 Citations (SciVal)

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.

Original language	English
Pages (from-to)	152-157
Number of pages	6
Journal	International Journal of Biological Macromolecules
Volume	103
DOIs	https://doi.org/10.1016/j.ijbiomac.2017.05.008
Publication status	Published - 1 Oct 2017

Funding

The authors would like to acknowledge the Doctoral Startup Foundation from Hubei University of Technology (BSQD2016024), the National Natural Science Foundation of China (31401586), the Fundamental Research Funds for the Central Universities (2662016QD008), the Hubei Provincial Natural Science Foundation of China (2016CFB142), and the Open Project Program of Provincial Key Laboratory of Green Processing Technology and Product Safety of Natural Products (201602). This research was undertaken on the SAXS/WAXS beamline at the Australian Synchrotron, Victoria, Australia.

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

Keywords

Crystalline structure
Crystallinity
Crystals
Hydration
Starch

ASJC Scopus subject areas

Structural Biology
Biochemistry
Molecular Biology
Economics and Econometrics
General Energy

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10.1016/j.ijbiomac.2017.05.008

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title = "Hydration-induced crystalline transformation of starch polymer under ambient conditions",

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.",

keywords = "Crystalline structure, Crystallinity, Crystals, Hydration, Starch",

author = "Dongling Qiao and Binjia Zhang and Jing Huang and Fengwei Xie and Wang, {David K.} and Fatang Jiang and Siming Zhao and Jie Zhu",

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AU - Qiao, Dongling

AU - Zhang, Binjia

AU - Huang, Jing

AU - Xie, Fengwei

AU - Wang, David K.

AU - Jiang, Fatang

AU - Zhao, Siming

AU - Zhu, Jie

PY - 2017/10/1

Y1 - 2017/10/1

N2 - 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.

AB - 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.

KW - Crystalline structure

KW - Crystallinity

KW - Crystals

KW - Hydration

KW - Starch

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Hydration-induced crystalline transformation of starch polymer under ambient conditions

Abstract

Funding

Keywords

ASJC Scopus subject areas

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