Temperature-Induced Nanostructure Formation Behavior of Core Cross-Linked Star-Shaped Poly (N-isopropylacrylamide) in Water

Terao, Ken; Masahiro, Abe; Nagase, Masafumi; Takeshima, Sayuri; Ida, Shohei; Kanaoka, Shokyoku

doi:https://doi.org/10.1021/acs.macromol.3c00891

Temperature-Induced Nanostructure Formation Behavior of Core Cross-Linked Star-Shaped Poly (N-isopropylacrylamide) in Water

Terao, Ken; Masahiro, Abe; Nagase, Masafumi et al.

Macromolecules, 2023, 56(14), 5635-5641

アクセス数:601件（2026-07-28 08:01 集計）

固定URL: https://hdl.handle.net/11094/92390

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タイトル	Temperature-Induced Nanostructure Formation Behavior of Core Cross-Linked Star-Shaped Poly (N-isopropylacrylamide) in Water
著者	NRID 1000060334132 1000060334132 ORCID 0000-0001-7363-4491 0000-0001-7363-4491 researchmap permalink kenterao kenterao Scopus Author ID 7101653015 7101653015 著者名 Terao, Ken
	著者名 Masahiro, Abe
	著者名 Nagase, Masafumi
	著者名 Takeshima, Sayuri
	NRID 1000080610740 1000080610740 著者名 Ida, Shohei
	NRID 1000010275167 1000010275167 著者名 Kanaoka, Shokyoku
キーワード等	Nanoparticles
	Scattering
	Solution chemistry
	Thermoresponsive polymers
	X-ray scattering
内容	Terao Ken, Masahiro Abe, Nagase Masafumi, et al. Temperature-Induced Nanostructure Formation Behavior of Core Cross-Linked Star-Shaped Poly (N-isopropylacrylamide) in Water. Macromolecules, 56(14), 5635-5641, 10 July, 2023, © 2023 American Chemical Society. DOI:10.1021/acs.macromol.3c00891.
抄録	Small-angle X-ray scattering and electrophoretic light scattering measurements were made for dilute aqueous solutions of star-branched poly(N-isopropylacrylamide) (sPNIPAM) at different temperatures. In the constant heating process, relatively narrow-dispersed sphere particles with an average aggregation number between 10 and 50 were observed in water at high temperatures (45 – 55 °C) regardless of the end groups: carboxyl, hydroxyl, and benzyl groups. Indeed, the test solutions for which the polymer mass concentration was 2 – 4 mg mL−1 did not become turbid at temperatures higher than the phase separation temperature of the corresponding linear polymer. Negative ζ potential was found for all solutions at the high temperature, 45 °C, indicating that electrostatic repulsion force stabilizes the dispersion state. Spinodal decomposition is the dominant mechanism of the microscopic phase separation because narrower distributed spherical particles were observed in the solution upon rapid heating than that for the constant heating procedure.
出版者	American Chemical Society (ACS)
収録物名	Macromolecules
巻(号)	56(14)
ページ	5635-5641
刊行年月	2023-07-25
言語	英語
ハンドルURL	https://hdl.handle.net/11094/92390
PISSN	00249297
eISSN	15205835
NCID	AA12097275
関連情報 (isVersionOf)	DOI (出版社版) https://doi.org/10.1021/acs.macromol.3c00891
アクセス権	open access
権利情報	This document is the unedited Author’s version of a Submitted Work that was subsequently accepted for publication in Temperature-Induced Nanostructure Formation Behavior of Core Cross-Linked Star-Shaped Poly (N-isopropylacrylamide) in Water, copyright © American Chemical Society after peer review. To access the final edited and published work see https://doi.org/10.1021/acs.macromol.3c00891.
出版タイプ	Accepted Manuscript
カテゴリ	学術雑誌論文 Journal Article

資源タイプ	学術雑誌論文
ローカル資源タイプ	学術雑誌論文
DCMI資源タイプ	text
DCTERMS.bibliographicCitation	Macromolecules. 2023, 56(14), p. 5635-5641
DC.title	Temperature-Induced Nanostructure Formation Behavior of Core Cross-Linked Star-Shaped Poly (N-isopropylacrylamide) in Water
DC.creator	Terao, Ken
	Masahiro, Abe
	Nagase, Masafumi
	Takeshima, Sayuri
	Ida, Shohei
	Kanaoka, Shokyoku
DC.publisher	American Chemical Society (ACS)
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2023-07-25
DC.identifier	https://doi.org/10.1021/acs.macromol.3c00891
DC.subject	Nanoparticles
	Scattering
	Solution chemistry
	Thermoresponsive polymers
	X-ray scattering
DC.description	Terao Ken, Masahiro Abe, Nagase Masafumi, et al. Temperature-Induced Nanostructure Formation Behavior of Core Cross-Linked Star-Shaped Poly (N-isopropylacrylamide) in Water. Macromolecules, 56(14), 5635-5641, 10 July, 2023, © 2023 American Chemical Society. DOI:10.1021/acs.macromol.3c00891.
DCTERMS.abstract	Small-angle X-ray scattering and electrophoretic light scattering measurements were made for dilute aqueous solutions of star-branched poly(N-isopropylacrylamide) (sPNIPAM) at different temperatures. In the constant heating process, relatively narrow-dispersed sphere particles with an average aggregation number between 10 and 50 were observed in water at high temperatures (45 – 55 °C) regardless of the end groups: carboxyl, hydroxyl, and benzyl groups. Indeed, the test solutions for which the polymer mass concentration was 2 – 4 mg mL−1 did not become turbid at temperatures higher than the phase separation temperature of the corresponding linear polymer. Negative ζ potential was found for all solutions at the high temperature, 45 °C, indicating that electrostatic repulsion force stabilizes the dispersion state. Spinodal decomposition is the dominant mechanism of the microscopic phase separation because narrower distributed spherical particles were observed in the solution upon rapid heating than that for the constant heating procedure.
DC.rights	This document is the unedited Author’s version of a Submitted Work that was subsequently accepted for publication in Temperature-Induced Nanostructure Formation Behavior of Core Cross-Linked Star-Shaped Poly (N-isopropylacrylamide) in Water, copyright © American Chemical Society after peer review. To access the final edited and published work see https://doi.org/10.1021/acs.macromol.3c00891.
DC.format	92390
citation_title	Temperature-Induced Nanostructure Formation Behavior of Core Cross-Linked Star-Shaped Poly (N-isopropylacrylamide) in Water
citation_author	Terao, Ken
	Masahiro, Abe
	Nagase, Masafumi
	Takeshima, Sayuri
	Ida, Shohei
	Kanaoka, Shokyoku
citation_publisher	American Chemical Society (ACS)
citation_language	英語
citation_date	2023-07-25
citation_journal_title	Macromolecules
citation_volume	56
citation_issue	14
citation_firstpage	5635
citation_lastpage	5641
citation_doi	https://doi.org/10.1021/acs.macromol.3c00891
citation_public_url	https://hdl.handle.net/11094/92390

Temperature-Induced Nanostructure Formation Behavior of Core Cross-Linked Star-Shaped Poly (N-isopropylacrylamide) in Water

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