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01-08-2011

Influence of ZnO on the properties of dilute and semi-dilute cellulose-NaOH-water solutions

Authors: Weiqing Liu, Tatiana Budtova, Patrick Navard

Published in: Cellulose | Issue 4/2011

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Abstract

The influence of ZnO as cellulose-8%NaOH-water solution stabilizer against gelation is studied. Cellulose intrinsic viscosity in 8%NaOH-water as a function of solution temperature is investigated in the presence and absence of ZnO. The addition of ZnO did not bring any improvement in terms of solvent thermodynamic quality. Non-dissolved ZnO particles were observed above 0.8–0.9% ZnO in 8%NaOH-water. Gelation of cellulose-8%NaOH solutions with and without ZnO are studied for various cellulose and ZnO concentrations (4–6% and 0–1.5%, respectively) in a wide range of temperatures (−5 °C to 50 °C). Gelation times were exponentially increasing with increasing ZnO concentration and with decreasing cellulose concentration and solution temperature. Gelation times of cellulose-NaOH-water-ZnO systems were found to follow a semi-empirical model correlating these three parameters. We suggest that ZnO is acting as water molecular “binder” stabilizing cellulose-NaOH-water solutions.

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Title: Influence of ZnO on the properties of dilute and semi-dilute cellulose-NaOH-water solutions
Authors: Weiqing Liu
Tatiana Budtova
Patrick Navard
Publication date: 01-08-2011
Publisher: Springer Netherlands
Published in: Cellulose / Issue 4/2011
Print ISSN: 0969-0239
Electronic ISSN: 1572-882X
DOI: https://doi.org/10.1007/s10570-011-9552-9

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