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

Author

Daria Nevstrueva, Arto Pihlajamäki, Juha Nikkola, and Mika Mänttäri

Subjects
cellulose, ionic liquid, ultrafiltration, coagulation bath temperature, immersion precipitation, Chemical technology, TP1-1185, Chemical engineering, TP155-156
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.

Published
2018
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2. Effect of precipitation temperature on the properties of cellulose ultrafiltration membranes prepared via immersion precipitation with ionic liquid as solvent

Author

Mika Mänttäri, Daria Nevstrueva, Juha Nikkola, Arto Pihlajamäki, Lappeenrannan teknillinen yliopisto, Lappeenranta University of Technology, and fi=School of Engineering Science|en=School of Engineering Science

Subjects
Materials science, Ultrafiltration, Filtration and Separation, 02 engineering and technology, Ionic liquid, lcsh:Chemical technology, 010402 general chemistry, 01 natural sciences, Article, law.invention, Contact angle, chemistry.chemical_compound, law, Coagulation bath temperature, Chemical Engineering (miscellaneous), lcsh:TP1-1185, lcsh:Chemical engineering, Cellulose, ta216, Filtration, Immersion precipitation, Fouling, Precipitation (chemistry), Process Chemistry and Technology, lcsh:TP155-156, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Membrane, Chemical engineering, chemistry, 0210 nano-technology
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. Publishers version

Published
2018
Full Text
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