Dual thermoresponsive polysaccharide derivative – water system. Partially substituted amylose butylcarbamate in water

Nakata, Yuma; Kitamura, Shinichi; Terao, Ken

doi:https://doi.org/10.1016/j.carbpol.2023.121587

Dual thermoresponsive polysaccharide derivative – water system. Partially substituted amylose butylcarbamate in water

Nakata, Yuma; Kitamura, Shinichi; Terao, Ken

Carbohydrate Polymers, 2024, 325(8), 121587

アクセス数:594件（2026-07-28 00:14 集計）

固定URL: https://hdl.handle.net/11094/93147

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タイトル	Dual thermoresponsive polysaccharide derivative – water system. Partially substituted amylose butylcarbamate in water
著者	著者名 Nakata, Yuma
	NRID 1000060117869 1000060117869 著者名 Kitamura, Shinichi
	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
内容	Nakata Yuma, Kitamura Shinichi, Terao Ken. Dual thermoresponsive polysaccharide derivative – water system. Partially substituted amylose butylcarbamate in water. Carbohydrate Polymers 325, 121587 (2024); https://doi.org/10.1016/j.carbpol.2023.121587.
抄録	Partially substituted amylose n-butylcarbamate (ABC) samples were synthesized with weight-average molar mass Mw ranging between 40 kg mol−1 and 220 kg mol−1 with different degree of substitution DS. When DS was between 0.17 and 0.33, the ABC samples were soluble in water. Furthermore, both LCST and UCST type phase separations were observed for the ABC samples in water when DS is >0.26. The closed-loop phase diagrams for the dual thermoresponsive ABC samples in water were constructed by turbidity measurement. The UCST ranged from 70 °C to 77 °C and the LCST ranged from 13 °C to 17 °C. SAXS measurements were performed for dilute aqueous ABC solutions to determine the chain conformation of ABC at various temperatures. The resulting form factor at the polymer mass concentration of 3 mg mL−1 indicated that the chain conformation is almost independent of temperature, except for the chain diameter, which is influenced by the temperature-dependent hydration behavior. This result suggests that the attractive interactions between ABC chains are not very significant even between UCST and LCST, where higher concentrated polymer solutions show macroscopic phase separation.
出版者	Elsevier BV
収録物名	Carbohydrate Polymers
巻(号)	325(8)
ページ	121587
刊行年月	2024-02-01
言語	英語
ハンドルURL	https://hdl.handle.net/11094/93147
PISSN	01448617
eISSN	18791344
関連情報 (isVersionOf)	DOI (出版社版) https://doi.org/10.1016/j.carbpol.2023.121587
アクセス権	open access
権利情報	©2024. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
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	Carbohydrate Polymers. 2024, 325(8), p. 121587
DC.title	Dual thermoresponsive polysaccharide derivative – water system. Partially substituted amylose butylcarbamate in water
DC.creator	Nakata, Yuma
	Kitamura, Shinichi
	Terao, Ken
DC.publisher	Elsevier BV
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2024-02-01
DC.identifier	https://doi.org/10.1016/j.carbpol.2023.121587
DC.description	Nakata Yuma, Kitamura Shinichi, Terao Ken. Dual thermoresponsive polysaccharide derivative – water system. Partially substituted amylose butylcarbamate in water. Carbohydrate Polymers 325, 121587 (2024); https://doi.org/10.1016/j.carbpol.2023.121587.
DCTERMS.abstract	Partially substituted amylose n-butylcarbamate (ABC) samples were synthesized with weight-average molar mass Mw ranging between 40 kg mol−1 and 220 kg mol−1 with different degree of substitution DS. When DS was between 0.17 and 0.33, the ABC samples were soluble in water. Furthermore, both LCST and UCST type phase separations were observed for the ABC samples in water when DS is >0.26. The closed-loop phase diagrams for the dual thermoresponsive ABC samples in water were constructed by turbidity measurement. The UCST ranged from 70 °C to 77 °C and the LCST ranged from 13 °C to 17 °C. SAXS measurements were performed for dilute aqueous ABC solutions to determine the chain conformation of ABC at various temperatures. The resulting form factor at the polymer mass concentration of 3 mg mL−1 indicated that the chain conformation is almost independent of temperature, except for the chain diameter, which is influenced by the temperature-dependent hydration behavior. This result suggests that the attractive interactions between ABC chains are not very significant even between UCST and LCST, where higher concentrated polymer solutions show macroscopic phase separation.
DC.rights	©2024. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
DC.format	93147
citation_title	Dual thermoresponsive polysaccharide derivative – water system. Partially substituted amylose butylcarbamate in water
citation_author	Nakata, Yuma
	Kitamura, Shinichi
	Terao, Ken
citation_publisher	Elsevier BV
citation_language	英語
citation_date	2024-02-01
citation_journal_title	Carbohydrate Polymers
citation_volume	325
citation_issue	8
citation_firstpage	121587
citation_doi	https://doi.org/10.1016/j.carbpol.2023.121587
citation_public_url	https://hdl.handle.net/11094/93147

Dual thermoresponsive polysaccharide derivative – water system. Partially substituted amylose butylcarbamate in water

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