Schiff base crosslinked poly(γ-glutamic acid) composite films with high mechanical strength and remoldability

Yao, Ying; Hsu, Yu I.; Uyama, Hiroshi

doi:https://doi.org/10.1016/j.polymdegradstab.2025.111450

Schiff base crosslinked poly(γ-glutamic acid) composite films with high mechanical strength and remoldability

Yao, Ying; Hsu, Yu I.; Uyama, Hiroshi

Polymer Degradation and Stability, 2025, 240, 111450

アクセス数:48件（2025-10-18 14:15 集計）

固定URL: https://hdl.handle.net/11094/102606

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タイトル	Schiff base crosslinked poly(γ-glutamic acid) composite films with high mechanical strength and remoldability
著者	著者名 Yao, Ying
	NRID 1000010757678 1000010757678 ORCID 0000-0002-4533-7200 0000-0002-4533-7200 researchmap permalink yuihsu yuihsu Scopus Author ID 55389981500 55389981500 著者名 Hsu, Yu I.
	NRID 1000070203594 1000070203594 ORCID 0000-0002-8587-2507 0000-0002-8587-2507 researchmap permalink read0168389 read0168389 Scopus Author ID 7102108908 7102108908 著者名 Uyama, Hiroshi
キーワード等	Acylhydrazone bond
	Chemical recyclability
	Poly(vinyl alcohol)
	Poly(γ-glutamic acid)
	Sustainable packaging
内容	Yao Y., Hsu Y.I., Uyama H.. Schiff base crosslinked poly(γ-glutamic acid) composite films with high mechanical strength and remoldability. Polymer Degradation and Stability 240, 111450 (2025); https://doi.org/10.1016/j.polymdegradstab.2025.111450.
抄録	With growing concerns over the environmental impact of traditional thermoset materials, the development of green and sustainable alternatives has emerged as a key research priority. In this study, we report a novel approach for fabricating recyclable poly(γ-glutamic acid) (γ-PGA)-based films via dynamic covalent Schiff base crosslinking. γ-PGA was first functionalized with hydrazide groups via reaction with adipic dihydrazide (P-ADH) and subsequently crosslinked with acetoacetylated poly(vinyl alcohol) (AAPVA) under mild, catalyst-free conditions to form an acylhydrazone crosslinked network, resulting in a high-performance, recyclable thermoset film. The resulting films demonstrated excellent mechanical properties (a tensile strength of 123.5 MPa and Young's modulus of 4.4 GPa), high optical transparency, UV-shielding capability, and solvent resistance. Notably, dynamic crosslinks enable acid-triggered cleavage, allowing for the recovery of macromolecular components and their reprocessing into new films, thereby demonstrating exceptional chemical recyclability and reusability. This work presents a promising strategy for enhancing the performance and sustainability of γ-PGA-based materials and highlights their potential as viable alternatives to conventional plastic thermosets.
出版者	Elsevier Ltd
収録物名	Polymer Degradation and Stability
巻(号)	240
ページ	111450
刊行年月	2025-06-05
言語	英語
ハンドルURL	https://hdl.handle.net/11094/102606
PISSN	01413910
関連情報 (isIdenticalTo)	DOI (出版社版) https://doi.org/10.1016/j.polymdegradstab.2025.111450
アクセス権	open access
権利情報	This article is licensed under a Creative Commons Attribution-NonCommercial 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
DCMI資源タイプ	text
DCTERMS.bibliographicCitation	Polymer Degradation and Stability. 2025, 240, p. 111450
DC.title	Schiff base crosslinked poly(γ-glutamic acid) composite films with high mechanical strength and remoldability
DC.creator	Yao, Ying
	Hsu, Yu I.
	Uyama, Hiroshi
DC.publisher	Elsevier Ltd
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2025-06-05
DC.identifier	https://doi.org/10.1016/j.polymdegradstab.2025.111450
DC.subject	Acylhydrazone bond
	Chemical recyclability
	Poly(vinyl alcohol)
	Poly(γ-glutamic acid)
	Sustainable packaging
DC.description	Yao Y., Hsu Y.I., Uyama H.. Schiff base crosslinked poly(γ-glutamic acid) composite films with high mechanical strength and remoldability. Polymer Degradation and Stability 240, 111450 (2025); https://doi.org/10.1016/j.polymdegradstab.2025.111450.
DCTERMS.abstract	With growing concerns over the environmental impact of traditional thermoset materials, the development of green and sustainable alternatives has emerged as a key research priority. In this study, we report a novel approach for fabricating recyclable poly(γ-glutamic acid) (γ-PGA)-based films via dynamic covalent Schiff base crosslinking. γ-PGA was first functionalized with hydrazide groups via reaction with adipic dihydrazide (P-ADH) and subsequently crosslinked with acetoacetylated poly(vinyl alcohol) (AAPVA) under mild, catalyst-free conditions to form an acylhydrazone crosslinked network, resulting in a high-performance, recyclable thermoset film. The resulting films demonstrated excellent mechanical properties (a tensile strength of 123.5 MPa and Young's modulus of 4.4 GPa), high optical transparency, UV-shielding capability, and solvent resistance. Notably, dynamic crosslinks enable acid-triggered cleavage, allowing for the recovery of macromolecular components and their reprocessing into new films, thereby demonstrating exceptional chemical recyclability and reusability. This work presents a promising strategy for enhancing the performance and sustainability of γ-PGA-based materials and highlights their potential as viable alternatives to conventional plastic thermosets.
DC.rights	This article is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
DC.format	102606
citation_title	Schiff base crosslinked poly(γ-glutamic acid) composite films with high mechanical strength and remoldability
citation_author	Yao, Ying
	Hsu, Yu I.
	Uyama, Hiroshi
citation_publisher	Elsevier Ltd
citation_language	英語
citation_date	2025-06-05
citation_journal_title	Polymer Degradation and Stability
citation_volume	240
citation_firstpage	111450
citation_doi	https://doi.org/10.1016/j.polymdegradstab.2025.111450
citation_public_url	https://hdl.handle.net/11094/102606

Schiff base crosslinked poly(γ-glutamic acid) composite films with high mechanical strength and remoldability

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