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Membranes 2018, 8(4), 87; https://doi.org/10.3390/membranes8040087

Effect of Precipitation Temperature on the Properties of Cellulose Ultrafiltration Membranes Prepared via Immersion Precipitation with Ionic Liquid as Solvent

1
LUT School of Engineering Science, Lappeenranta University of Technology, FI-53851 Lappeenranta, Finland
2
VTT Advanced Materials, P.O. Box 1300, FI-33101 Tampere, Finland
Current address: UPM Biocomposites, FI-15141 Lahti, Finland.
*
Author to whom correspondence should be addressed.
Received: 30 August 2018 / Revised: 18 September 2018 / Accepted: 21 September 2018 / Published: 25 September 2018
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Abstract

Supported cellulose ultrafiltration membranes are cast from a cellulose-ionic liquid solution by the immersion precipitation technique. The effects of coagulation bath temperature and polymer concentration in the casting solution on the membrane morphology, wettability, pure water flux, molecular weight cut-off, and fouling resistance are studied. Scanning electron microscopy, contact angle measurements, atomic force microscopy, and filtration experiments are carried out in order to characterise the obtained ultrafiltration cellulose membranes. The results show the effect of coagulation bath temperature and polymer concentration on the surface morphology and properties of cellulose ultrafiltration membranes. Optimisation of the two parameters leads to the creation of dense membranes with good pure water fluxes and proven fouling resistance towards humic acid water solutions. View Full-Text
Keywords: cellulose; ionic liquid; ultrafiltration; coagulation bath temperature; immersion precipitation cellulose; ionic liquid; ultrafiltration; coagulation bath temperature; immersion precipitation
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Nevstrueva, D.; Pihlajamäki, A.; Nikkola, J.; Mänttäri, M. Effect of Precipitation Temperature on the Properties of Cellulose Ultrafiltration Membranes Prepared via Immersion Precipitation with Ionic Liquid as Solvent. Membranes 2018, 8, 87.

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