Optimizing crystal transitions in low-temperature, low-concentration NaOH solutions to prepare cellulose I and II composite materials

Kugo, Yuki; Isono, Takuya; Fujiwara, Masashi; Sato, Toshifumi; Tani, Hirofumi; Erata, Tomoki; Tajima, Kenji

Optimizing crystal transitions in low-temperature, low-concentration NaOH solutions to prepare cellulose I and II composite materials

Kugo, Yuki; Isono, Takuya; Fujiwara, Masashi et al.

Polymer journal, 2024, 56, 939-943

Permalink : https://hdl.handle.net/2115/93742

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論文情報

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アクセス権	open access
URI	https://hdl.handle.net/2115/93742
タイトル	Optimizing crystal transitions in low-temperature, low-concentration NaOH solutions to prepare cellulose I and II composite materials
著者	Kugo, Yuki ; Isono, Takuya ; Fujiwara, Masashi ; Sato, Toshifumi ; Tani, Hirofumi ; Erata, Tomoki ; Tajima, Kenji
著者名 Kugo, Yuki
e-Rad_Researcher 70740075 著者名 Isono, Takuya
e-Rad_Researcher 30229075 著者名 Fujiwara, Masashi
e-Rad_Researcher 80291235 著者名 Sato, Toshifumi
e-Rad_Researcher 10271644 著者名 Tani, Hirofumi
著者名 Erata, Tomoki
e-Rad_Researcher 00271643 著者名 Tajima, Kenji
言語	英語
キーワード	Cellulose
	Crystal transition
	Liquid nitrogen
	Low-temperature
	alkali
	treatment
	Mercerization
発行日	2024-06-12
出版者	Springer Nature
収録物名	Polymer journal
巻(号)	56
ページ	939-943
抄録	Cellulose II exhibits exceptional attributes, including flexibility, high stainability, and gloss. However, its strength is lower than that of cellulose I due to reduced crystallinity during the crystal transition. In this study, we devised a novel method to regulate the proportion and distribution of cellulose I and II crystals. This was achieved by employing a low-concentration alkaline solution and liquid nitrogen, resulting in a high-strength composite material that retained the excellent properties of cellulose II. When cellulose powder was immersed in an 8 wt% NaOH solution and quenched with liquid nitrogen, the crystal transition from cellulose I to II occurred outward from the sample periphery to its center. The percentage of cellulose II increased proportionally with treatment time. This technique was extended to cellulose I-rich cotton fibers, facilitating the creation of a composite fiber with cellulose I at the core and cellulose II on the surface. The tensile strength and Young's modulus of the composite fiber were greater than those of the mercerized cellulose II fiber. Additionally, the elongation at break and toughness of these fibers surpassed those of conventional cotton fibers. This innovative method allows for the preparation of cellulose I and II composite materials with diverse properties. This study developed a novel method for the control of the cellulose crystal of cellulose I and II. The crystal transition from cellulose I to II was tracked when cellulose I, which is soaked in a low-concentration NaOH aqueous solution, was quenched using liquid nitrogen. The crystal transition progressed from the surface to the center of the sample. This quench treatment has the potential to fabricate new cellulose materials with a cellulose I core and a cellulose II surface.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: http://dx.doi.org/10.1038/s41428-024-00928-3
PISSN	0032-3896
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1038/s41428-024-00928-3