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Issue 4, 2018, Issue in Progress
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Clear transparent cellulose nanopaper prepared from a concentrated dispersion by high-humidity drying

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Abstract

Optically transparent cellulose nanopaper is a promising candidate for flexible device substrates because of its light weight, surface smoothness, and high dimensional stability with respect to temperature. Conventionally, clear transparent nanopaper has been fabricated from cellulose nanofiber dispersions with quite low concentration: less than 0.5 wt%. However, this diluteness leads to several problems, such as huge energy consumption and long operation time for drying. Therefore, nanopaper should be fabricated from a concentrated dispersion to mitigate these problems. In this study, transparent nanopaper was fabricated from cellulose nanofiber dispersions with various concentrations (0.24–1.81 wt%). Optical experiments revealed that the haze of the transparent nanopaper increased monotonically with cellulose nanofiber dispersion concentration, when the cellulose nanofiber dispersion was prepared from holocellulose pulp and conventional over-drying was applied. Based on our insight into the origin of this increase in the haze of transparent nanopaper, we developed high-humidity drying, which successfully produced clear transparent nanopaper from a concentrated dispersion without prolonged drying time.

Graphical abstract: Clear transparent cellulose nanopaper prepared from a concentrated dispersion by high-humidity drying

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Publication details

The article was received on 22 Nov 2017, accepted on 27 Dec 2017 and first published on 08 Jan 2018


Article type: Paper
DOI: 10.1039/C7RA12672G
Citation: RSC Adv., 2018,8, 1833-1837
  • Open access: Creative Commons BY-NC license
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    Clear transparent cellulose nanopaper prepared from a concentrated dispersion by high-humidity drying

    N. Isobe, T. Kasuga and M. Nogi, RSC Adv., 2018, 8, 1833
    DOI: 10.1039/C7RA12672G

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