学術雑誌論文

学術雑誌論文

text

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

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

Institute of Physics Publishing

英語

text

2017-03-17

https://doi.org/10.1088/2058-8585/aa60f4

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.

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.

© 2017 IOP Publishing Ltd

78452

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

Institute of Physics Publishing

英語

2017-03-17

Flexible and Printed Electronics

2

1

014003

https://doi.org/10.1088/2058-8585/aa60f4

https://hdl.handle.net/11094/78452