Lyotropic liquid crystallinity of amylose tris(alkylcarbamates): Cholesteric and smectic phase formation in different solvents

Oyamada, Keiko; Terao, Ken; Suwa, Masayori; Kitamura, Shinichi; Sato, Takahiro

doi:https://doi.org/10.1021/ma400787c

Lyotropic liquid crystallinity of amylose tris(alkylcarbamates): Cholesteric and smectic phase formation in different solvents

Oyamada, Keiko; Terao, Ken; Suwa, Masayori et al.

Macromolecules, 2013, 46(11), 4589-4595

Number of Access:950（2026-04-06 13:36 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/81836

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Title	Lyotropic liquid crystallinity of amylose tris(alkylcarbamates): Cholesteric and smectic phase formation in different solvents
Creator	CreatorName Oyamada, Keiko
	NRID 1000060334132 1000060334132 ORCID 0000-0001-7363-4491 0000-0001-7363-4491 researchmap permalink kenterao kenterao Scopus Author ID 7101653015 7101653015 CreatorName Terao, Ken
	NRID 1000090403097 1000090403097 ORCID 0000-0003-3378-2275 0000-0003-3378-2275 researchmap permalink read0092319 read0092319 Scopus Author ID 7102300115 7102300115 CreatorName Suwa, Masayori
	NRID 1000060117869 1000060117869 CreatorName Kitamura, Shinichi
	NRID 1000010196248 1000010196248 CreatorName Sato, Takahiro
Description	Oyamada K., Terao K., Suwa M., et al. Lyotropic liquid crystallinity of amylose tris(alkylcarbamates): Cholesteric and smectic phase formation in different solvents. Macromolecules, 46(11), 4589-4595, May 20, 2013. Copyright © 2013, American Chemical Society. https://doi.org/10.1021/ma400787c.
Abstract	Lyotropic liquid crystallinity was investigated for amylose tris(n-butylcarbamate) (ATBC), amylose tris(ethylcarabamate) (ATEC), and amylose tris(n-hexylcarbamate) (ATHC) in tetrahydrofuran (THF) and ethyl lactates (ELs) by using phase separation experiments, polarized microscopic observation, small-angle X-ray diffraction, and circular dichroism measurements. Concentrated THF solution of ATBC has selective reflection at visible light wavelength, indicating the formation of cholesteric phase. A current theory well explains the phase diagram of ATBC, ATEC, and ATHC in THF. On the other hand, ELs solution forms smectic phase and it has significantly different phase diagram, that is, the biphasic range is much wider than that in THF. In other words, highly concentrated smectic phase can be obtained from semidilute and rather low viscosity ELs solution. This is likely because amylose alkylcarbamate chains may have significant anisotropic intermolecular attractive interaction in between polymer chains in ELs or intermolecular interactions between the chain ends are much more different from those in THF. © 2013 American Chemical Society.
Publisher	American Chemical Society
Source Title	Macromolecules
Volume (Issue)	46(11)
Page	4589-4595
Date of Issued	2013-05-20
Language	English
Handle URL	https://hdl.handle.net/11094/81836
PISSN	00249297
eISSN	15205835
NCID	AA0071963X
Relation.isVersionOf	DOI (Publisher Version) https://doi.org/10.1021/ma400787c
Relation.isIdenticalTo	PMID 00249297
Access Rights	open access
CopyRight	This document is the Accepted Manuscript version of a Published Work that appeared in final form in Macromolecules, © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/ma400787c.
oaire:version	Accepted Manuscript
Category	学術雑誌論文 Journal Article

Resource Type	journal article
Local Type	Journal Article
DCMI Type	Text
DCTERMS.bibliographicCitation	Macromolecules. 2013, 46(11), p. 4589-4595
DC.title	Lyotropic liquid crystallinity of amylose tris(alkylcarbamates): Cholesteric and smectic phase formation in different solvents
DC.creator	Oyamada, Keiko
	Terao, Ken
	Suwa, Masayori
	Kitamura, Shinichi
	Sato, Takahiro
DC.publisher	American Chemical Society
DC.language' scheme='DCTERMS.RFC1766	English
DC.type' scheme='DCTERMS.DCMIType	Text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2013-05-20
DC.identifier	https://doi.org/10.1021/ma400787c
DC.description	Oyamada K., Terao K., Suwa M., et al. Lyotropic liquid crystallinity of amylose tris(alkylcarbamates): Cholesteric and smectic phase formation in different solvents. Macromolecules, 46(11), 4589-4595, May 20, 2013. Copyright © 2013, American Chemical Society. https://doi.org/10.1021/ma400787c.
DCTERMS.abstract	Lyotropic liquid crystallinity was investigated for amylose tris(n-butylcarbamate) (ATBC), amylose tris(ethylcarabamate) (ATEC), and amylose tris(n-hexylcarbamate) (ATHC) in tetrahydrofuran (THF) and ethyl lactates (ELs) by using phase separation experiments, polarized microscopic observation, small-angle X-ray diffraction, and circular dichroism measurements. Concentrated THF solution of ATBC has selective reflection at visible light wavelength, indicating the formation of cholesteric phase. A current theory well explains the phase diagram of ATBC, ATEC, and ATHC in THF. On the other hand, ELs solution forms smectic phase and it has significantly different phase diagram, that is, the biphasic range is much wider than that in THF. In other words, highly concentrated smectic phase can be obtained from semidilute and rather low viscosity ELs solution. This is likely because amylose alkylcarbamate chains may have significant anisotropic intermolecular attractive interaction in between polymer chains in ELs or intermolecular interactions between the chain ends are much more different from those in THF. © 2013 American Chemical Society.
DC.rights	This document is the Accepted Manuscript version of a Published Work that appeared in final form in Macromolecules, © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/ma400787c.
DC.format	81836
citation_title	Lyotropic liquid crystallinity of amylose tris(alkylcarbamates): Cholesteric and smectic phase formation in different solvents
citation_author	Oyamada, Keiko
	Terao, Ken
	Suwa, Masayori
	Kitamura, Shinichi
	Sato, Takahiro
citation_publisher	American Chemical Society
citation_language	English
citation_date	2013-05-20
citation_journal_title	Macromolecules
citation_volume	46
citation_issue	11
citation_firstpage	4589
citation_lastpage	4595
citation_doi	https://doi.org/10.1021/ma400787c
citation_pmid	00249297
citation_public_url	https://hdl.handle.net/11094/81836

Lyotropic liquid crystallinity of amylose tris(alkylcarbamates): Cholesteric and smectic phase formation in different solvents

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