Acetylation of optically transparent cellulose nanopaper for high thermal and moisture resistance in a flexible device substrate

Yagyu, Hitomi; Ifuku, Shinsuku; Nogi, Masaya

Flexible and Printed Electronics, 2017, 2(1), 014003

Number of Access:421（2025-08-13 23:50 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/78452

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Title
Acetylation of optically transparent cellulose nanopaper for high thermal and moisture resistance in a flexible device substrate
Creator
CreatorName
Yagyu, Hitomi
CreatorName
Ifuku, Shinsuku
NRID
1000080379031 1000080379031
researchmap permalink
read0151141 read0151141
Scopus Author ID
9846851200 9846851200
CreatorName
Nogi, Masaya
Subject
Cellulose nanofiber
Flexible subtstrate
Nanocellulose
Transparent paper
Description
This is the Accepted Manuscript version of an article accepted for publication in Flex. Print. Electron.. IOP Publishing Ltd are not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.1088/2058-8585/aa60f4.
Abstract
Optically transparent cellulose nanopaper is a promising candidate for flexible device substrates because it is lightweight, has a smooth surface and high dimensional stability against temperature. However, the moisture and thermal resistance should be improved, while maintaining high transparency for application. In a transparent polymer composite reinforced with cellulose nanofibers, these properties were improved by cellulose acetylation, which were fabricated by starting from acetylated pulps or rinsing acetylated nanofiber film with water. However, these acetylation procedures reduce the transparency of cellulose nanopaper because the hydrophobic nature of acetyl groups produce inhomogeneous aggregations of cellulose nanofibers, which cause light scattering. Therefore, we propose a new procedure of acetylated cellulose nanopaper by rinsing with low polarity solvents such as toluene. The acetylated cellulose nanopaper obtained shows improved moisture and thermal resistance, and maintained optical transparency. The moisture and thermal resistance increase with the degree of acetyl group substitutions. The total transmittance, haze, crystallinity, coefficient of thermal expansions, dielectric constant, and dielectric loss are constant for varying DSs. These findings promote the application of transparent cellulose nanopaper in flexible device substrates.
Publisher
Institute of Physics Publishing
Source Title
Flexible and Printed Electronics
Volume (Issue)
2(1)
Page
014003
Date of Issued
2017-03-17
Language
English
Handle URL
https://hdl.handle.net/11094/78452
eISSN
20588585
Relation.isVersionOf
DOI (Publisher Version)
https://doi.org/10.1088/2058-8585/aa60f4
Access Rights
open access
CopyRight
© 2017 IOP Publishing Ltd
oaire:version
Accepted Manuscript
Category
学術雑誌論文 Journal Article