Evaluation of the Water Repellency and Structure of Cellulose Nanofibers Derived from Waste Hop Stems Using a Fluoroalkyl Silane Coupling Treatment

Kohei Yamada; Noriko Kanai; Izuru Kawamura

doi:10.1007/s12649-023-02254-w

Evaluation of the Water Repellency and Structure of Cellulose Nanofibers Derived from Waste Hop Stems Using a Fluoroalkyl Silane Coupling Treatment

Kohei Yamada, Noriko Kanai, Izuru Kawamura

Yokohama National University

Research output: Contribution to journal › Article › peer-review

Abstract

Fluorinated octyl silane-modified cellulose nanofibers (FOTS-CNF) were successfully prepared from 2,2,6,6-tetramethylpiperidine-1-oxyl-oxidized CNFs (TOCNFs) derived from agricultural waste hop stems. The surface structures of the FOTS-modified CNFs were site-specifically investigated by 13C/19F/29Si solid-state nuclear magnetic resonance and Fourier-transform infrared spectroscopy. The spectroscopic results indicated that siloxane layers with fluorinated octyl chains extensively covered on the hydrophilic surface of the TOCNFs. This hydrophobic surface coating exhibited the highest water contact angle of 126.9Â°. Graphical Abstract: (Figure presented.)

Original language	English
Pages (from-to)	1541-1552
Number of pages	12
Journal	Waste and Biomass Valorization
Volume	15
Issue number	3
DOIs	https://doi.org/10.1007/s12649-023-02254-w
Publication status	Published - Mar 2024
Externally published	Yes

Bibliographical note

Publisher Copyright:
© The Author(s), under exclusive licence to Springer Nature B.V. 2023.

Keywords

Cellulose nanofiber
Organosilane
Surface modification
Waste hop stem
Water repellency

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1007/s12649-023-02254-w

Cite this

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title = "Evaluation of the Water Repellency and Structure of Cellulose Nanofibers Derived from Waste Hop Stems Using a Fluoroalkyl Silane Coupling Treatment",

abstract = "Fluorinated octyl silane-modified cellulose nanofibers (FOTS-CNF) were successfully prepared from 2,2,6,6-tetramethylpiperidine-1-oxyl-oxidized CNFs (TOCNFs) derived from agricultural waste hop stems. The surface structures of the FOTS-modified CNFs were site-specifically investigated by 13C/19F/29Si solid-state nuclear magnetic resonance and Fourier-transform infrared spectroscopy. The spectroscopic results indicated that siloxane layers with fluorinated octyl chains extensively covered on the hydrophilic surface of the TOCNFs. This hydrophobic surface coating exhibited the highest water contact angle of 126.9{\^A}°. Graphical Abstract: (Figure presented.)",

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author = "Kohei Yamada and Noriko Kanai and Izuru Kawamura",

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T1 - Evaluation of the Water Repellency and Structure of Cellulose Nanofibers Derived from Waste Hop Stems Using a Fluoroalkyl Silane Coupling Treatment

AU - Yamada, Kohei

AU - Kanai, Noriko

AU - Kawamura, Izuru

N1 - Publisher Copyright: © The Author(s), under exclusive licence to Springer Nature B.V. 2023.

PY - 2024/3

Y1 - 2024/3

N2 - Fluorinated octyl silane-modified cellulose nanofibers (FOTS-CNF) were successfully prepared from 2,2,6,6-tetramethylpiperidine-1-oxyl-oxidized CNFs (TOCNFs) derived from agricultural waste hop stems. The surface structures of the FOTS-modified CNFs were site-specifically investigated by 13C/19F/29Si solid-state nuclear magnetic resonance and Fourier-transform infrared spectroscopy. The spectroscopic results indicated that siloxane layers with fluorinated octyl chains extensively covered on the hydrophilic surface of the TOCNFs. This hydrophobic surface coating exhibited the highest water contact angle of 126.9Â°. Graphical Abstract: (Figure presented.)

AB - Fluorinated octyl silane-modified cellulose nanofibers (FOTS-CNF) were successfully prepared from 2,2,6,6-tetramethylpiperidine-1-oxyl-oxidized CNFs (TOCNFs) derived from agricultural waste hop stems. The surface structures of the FOTS-modified CNFs were site-specifically investigated by 13C/19F/29Si solid-state nuclear magnetic resonance and Fourier-transform infrared spectroscopy. The spectroscopic results indicated that siloxane layers with fluorinated octyl chains extensively covered on the hydrophilic surface of the TOCNFs. This hydrophobic surface coating exhibited the highest water contact angle of 126.9Â°. Graphical Abstract: (Figure presented.)

KW - Cellulose nanofiber

KW - Organosilane

KW - Surface modification

KW - Waste hop stem

KW - Water repellency

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Evaluation of the Water Repellency and Structure of Cellulose Nanofibers Derived from Waste Hop Stems Using a Fluoroalkyl Silane Coupling Treatment

Abstract

Bibliographical note

Keywords

UN SDGs

Access to Document

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