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Published in: Cellulose 1/2018

11-11-2017 | Original Paper

Changes in the hygroscopic behavior of cellulose due to variations in relative humidity

Authors: Ville A. Lovikka, Lauri Rautkari, Thaddeus C. Maloney

Published in: Cellulose | Issue 1/2018

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Abstract

Details on how cellulosic surfaces change under changing moisture are incomplete and even existing results are occasionally neglected. Unlike sometimes reported, water adsorption is unsuitable for surface area measurements. However, water can be utilized for assessing surface dynamics. Hygroscopic changes of pulp and bacterial cellulose were studied by dehydrating the samples in a low polarity solvent and then introducing them into a moist atmosphere in a dynamic vapor sorption (DVS) apparatus at 0–93% relative humidity (RH). The DVS treatment caused hygroscopicity loss near applied RH maxima, however, the hygroscopicity increased at RH values > 10–20% units lower. Additionally, the hygroscopic changes were partially reversible near the RH maximum. Therefore the hygroscopicity of cellulose could be controlled by tailoring the exposure history of the sample. Hornification reduced these changes. The observations support reported molecular simulations where cellulose was shown to restructure its surface depending on the polarity of its environment.

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Metadata
Title
Changes in the hygroscopic behavior of cellulose due to variations in relative humidity
Authors
Ville A. Lovikka
Lauri Rautkari
Thaddeus C. Maloney
Publication date
11-11-2017
Publisher
Springer Netherlands
Published in
Cellulose / Issue 1/2018
Print ISSN: 0969-0239
Electronic ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-017-1570-9

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