Enlightening Freeze-Thaw Process of Physically Cross-Linked Poly(vinyl alcohol) Hydrogels by Aggregation-Induced Emission Fluorogens

Tavakoli, J; Gascooke, J; Xie, N; Tang, BZ; Tang, Y

Enlightening Freeze-Thaw Process of Physically Cross-Linked Poly(vinyl alcohol) Hydrogels by Aggregation-Induced Emission Fluorogens

Tavakoli, J

Gascooke, J Xie, N Tang, BZ Tang, Y

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Publisher:: AMER CHEMICAL SOC
Publication Type:: Journal Article
Citation:: ACS Applied Polymer Materials, 2019, 1, (6), pp. 1390-1398
Issue Date:: 2019-06-14

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Field	Value	Language
dc.contributor.author	Tavakoli, J https://orcid.org/0000-0002-0696-6530
dc.contributor.author	Gascooke, J
dc.contributor.author	Xie, N
dc.contributor.author	Tang, BZ
dc.contributor.author	Tang, Y
dc.date.accessioned	2022-07-22T01:16:17Z
dc.date.available	2022-07-22T01:16:17Z
dc.date.issued	2019-06-14
dc.identifier.citation	ACS Applied Polymer Materials, 2019, 1, (6), pp. 1390-1398
dc.identifier.issn	2637-6105
dc.identifier.issn	2637-6105
dc.identifier.uri	http://hdl.handle.net/10453/159101
dc.description.abstract	Crystallization is a conventional technique for fabricating physically cross-linked poly(vinyl alcohol)-based hydrogels (PVA) with desired properties. The creation of crystalline regions induced by the freeze-thaw process is attributed to the molecular organization that serves as the junction points containing folded chains. The current study employs an aggregation-induced emission fluorogen (AIEgen) to produce a new approach for studying the kinetics of the formation of crystalline regions induced by the freeze-thaw process. For the first time, this research directly links the effects of freeze-thaw cycles to the final physical and mechanical properties of PVA hydrogels by using AIEgen. The results of the study reveal an increase in the fluorescent properties during the freeze-thaw process that reflects the rise in the percentage of crystallinity. This approach can be employed effectively to demonstrate the crystallization process using significant color and brightness differences in crystalline regions compared to amorphous areas. This capability allows researchers to visualize the crystalline regions clearly in situ and to study their kinetics, formation, and transition in the solid state. The results of this study have implications for the broad class of gels derived through polymer crystallization from solution.
dc.language	English
dc.publisher	AMER CHEMICAL SOC
dc.relation.ispartof	ACS Applied Polymer Materials
dc.relation.isbasedon	10.1021/acsapm.9b00173
dc.rights	info:eu-repo/semantics/closedAccess
dc.title	Enlightening Freeze-Thaw Process of Physically Cross-Linked Poly(vinyl alcohol) Hydrogels by Aggregation-Induced Emission Fluorogens
dc.type	Journal Article
utslib.citation.volume	1
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Strength - CHT - Health Technologies
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Biomedical Engineering
pubs.organisational-group	/University of Technology Sydney/Centre for Health Technologies (CHT)
utslib.copyright.status	closed_access	*
dc.date.updated	2022-07-22T01:16:13Z
pubs.issue	6
pubs.publication-status	Published
pubs.volume	1
utslib.citation.issue	6

Abstract:

Crystallization is a conventional technique for fabricating physically cross-linked poly(vinyl alcohol)-based hydrogels (PVA) with desired properties. The creation of crystalline regions induced by the freeze-thaw process is attributed to the molecular organization that serves as the junction points containing folded chains. The current study employs an aggregation-induced emission fluorogen (AIEgen) to produce a new approach for studying the kinetics of the formation of crystalline regions induced by the freeze-thaw process. For the first time, this research directly links the effects of freeze-thaw cycles to the final physical and mechanical properties of PVA hydrogels by using AIEgen. The results of the study reveal an increase in the fluorescent properties during the freeze-thaw process that reflects the rise in the percentage of crystallinity. This approach can be employed effectively to demonstrate the crystallization process using significant color and brightness differences in crystalline regions compared to amorphous areas. This capability allows researchers to visualize the crystalline regions clearly in situ and to study their kinetics, formation, and transition in the solid state. The results of this study have implications for the broad class of gels derived through polymer crystallization from solution.

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http://hdl.handle.net/10453/159101