Highly branched thermoresponsive polysaccharide derivative in water. Partly substituted highly branched cyclic dextrin ethylcarbamate

Kobayashi, Akihito; Terao, Ken

doi:https://doi.org/10.1016/j.carbpol.2024.122473

Highly branched thermoresponsive polysaccharide derivative in water. Partly substituted highly branched cyclic dextrin ethylcarbamate

Kobayashi, Akihito; Terao, Ken

Carbohydrate Polymers, 2024, 343, 122473

アクセス数:352件（2025-07-06 14:26 集計）

固定URL: https://hdl.handle.net/11094/97210

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タイトル	Highly branched thermoresponsive polysaccharide derivative in water. Partly substituted highly branched cyclic dextrin ethylcarbamate
著者	著者名 Kobayashi, Akihito
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
キーワード等	Water soluble polysaccharide derivative
	Highly branched polysaccharide
	LCST
	Small-angle X-ray scattering
	Inclusion complex
内容	Kobayashi Akihito, Terao Ken. Highly branched thermoresponsive polysaccharide derivative in water. Partly substituted highly branched cyclic dextrin ethylcarbamate. Carbohydrate Polymers 343, 122473 (2024); https://doi.org/10.1016/j.carbpol.2024.122473.
抄録	A thermoresponsive highly branched polysaccharide derivative was revealed from commercially available highly branched cyclic dextrin (HBCD), originally synthesized from amylopectin. Eight samples of partially substituted ethyl carbamate derivatives of HBCD (HEC) were prepared with a degree of substitution DS ranging from 0.27 to 1.46. Three samples with DS = 0.88, 1.05, and 1.22 showed LCST type phase separation in water. The intrinsic viscosity and form factor in water were typical of the hyperbranched structure. The intermolecular interactions between HEC and iodine or 1-anilinonaphthalene-8-sulfonic acid (ANS) were appreciably different from those of the linear analog (AEC), suggesting that the locally bent helical conformation of highly branched HEC chains has a different interaction with small molecules. The phase diagram of HEC-water systems was accidentally similar to that of the linear chain with the same molar mass and DS, although the one phase region of the branched polymer chain-poor solvent system is usually wider than that of the corresponding linear chain. This is likely due to the lower hydration nature of the polymer segment of HEC chains than that of the corresponding linear chain.
出版者	Elsevier BV
収録物名	Carbohydrate Polymers
巻(号)	343
ページ	122473
刊行年月	2024-11-01
言語	英語
ハンドルURL	https://hdl.handle.net/11094/97210
PISSN	01448617
関連情報 (isIdenticalTo)	DOI (出版社版) https://doi.org/10.1016/j.carbpol.2024.122473
アクセス権	open access
権利情報	This article is licensed under a Creative Commons Attribution 4.0 International License.
出版タイプ	Version of Record
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
DCTERMS.bibliographicCitation	Carbohydrate Polymers. 2024, 343, p. 122473
DC.title	Highly branched thermoresponsive polysaccharide derivative in water. Partly substituted highly branched cyclic dextrin ethylcarbamate
DC.creator	Kobayashi, Akihito
DC.creator	Terao, Ken
DC.publisher	Elsevier BV
DC.language' scheme='DCTERMS.RFC1766	英語
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2024-11-01
DC.identifier	https://doi.org/10.1016/j.carbpol.2024.122473
DC.subject	Water soluble polysaccharide derivative
	Highly branched polysaccharide
	LCST
	Small-angle X-ray scattering
	Inclusion complex
DC.description	Kobayashi Akihito, Terao Ken. Highly branched thermoresponsive polysaccharide derivative in water. Partly substituted highly branched cyclic dextrin ethylcarbamate. Carbohydrate Polymers 343, 122473 (2024); https://doi.org/10.1016/j.carbpol.2024.122473.
DCTERMS.abstract	A thermoresponsive highly branched polysaccharide derivative was revealed from commercially available highly branched cyclic dextrin (HBCD), originally synthesized from amylopectin. Eight samples of partially substituted ethyl carbamate derivatives of HBCD (HEC) were prepared with a degree of substitution DS ranging from 0.27 to 1.46. Three samples with DS = 0.88, 1.05, and 1.22 showed LCST type phase separation in water. The intrinsic viscosity and form factor in water were typical of the hyperbranched structure. The intermolecular interactions between HEC and iodine or 1-anilinonaphthalene-8-sulfonic acid (ANS) were appreciably different from those of the linear analog (AEC), suggesting that the locally bent helical conformation of highly branched HEC chains has a different interaction with small molecules. The phase diagram of HEC-water systems was accidentally similar to that of the linear chain with the same molar mass and DS, although the one phase region of the branched polymer chain-poor solvent system is usually wider than that of the corresponding linear chain. This is likely due to the lower hydration nature of the polymer segment of HEC chains than that of the corresponding linear chain.
DC.rights	This article is licensed under a Creative Commons Attribution 4.0 International License.
DC.format	97210
citation_title	Highly branched thermoresponsive polysaccharide derivative in water. Partly substituted highly branched cyclic dextrin ethylcarbamate
citation_author	Kobayashi, Akihito
citation_author	Terao, Ken
citation_publisher	Elsevier BV
citation_language	英語
citation_date	2024-11-01
citation_journal_title	Carbohydrate Polymers
citation_volume	343
citation_firstpage	122473
citation_doi	https://doi.org/10.1016/j.carbpol.2024.122473
citation_public_url	https://hdl.handle.net/11094/97210

Highly branched thermoresponsive polysaccharide derivative in water. Partly substituted highly branched cyclic dextrin ethylcarbamate

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