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Cellulose

Erschienen in:

01.08.2011

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

verfasst von: Weiqing Liu, Tatiana Budtova, Patrick Navard

Erschienen in: Cellulose | Ausgabe 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.

Vorheriger Artikel Hydroxyl orientations in cellobiose and other polyhydroxyl compounds: modeling versus experiment

Nächster Artikel Diffusion dynamics of 1-Butyl-3-methylimidazolium chloride from cellulose filament during coagulation process

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Titel: Influence of ZnO on the properties of dilute and semi-dilute cellulose-NaOH-water solutions
verfasst von: Weiqing Liu
Tatiana Budtova
Patrick Navard
Publikationsdatum: 01.08.2011
Verlag: Springer Netherlands
Erschienen in: Cellulose / Ausgabe 4/2011
Print ISSN: 0969-0239
Elektronische ISSN: 1572-882X
DOI: https://doi.org/10.1007/s10570-011-9552-9

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