Cellulose nanofibers (CNF) can be regarded as biodegradable and biobased alternatives for synthetic membrane materials. Carboxylic acid groups containing TEMPO oxidized CNF is highly anionic and can be used e.g. for scavenging of contaminants, such as cationic metal ions from waste water. Water stable membranes were prepared from TEMPO oxidized CNF with an addition of 10 w-% of poly(vinyl alcohol) (PVA). The water permeability of the membrane is in the reverse osmosis membrane region. Furthermore, a surface modification route in order to attach a thermoresponsive poly(N-isopropylacrylamide) group directly on nanocellulosic (TEMPO-PVA materials and unmodified CNF based materials) membrane surfaces was developed. Effects of surface modification on the membranes structure and properties were evaluated.
|Publication status||Published - 2014|
|Event||4th Dissemination workshop of the Nano4water cluster: Nanoenabled systems and membranes for water treatment - Stockholm, Sweden|
Duration: 23 Apr 2014 → 24 Apr 2014
Conference number: 4
|Workshop||4th Dissemination workshop of the Nano4water cluster|
|Period||23/04/14 → 24/04/14|
Hakalahti, M., Hänninen, T., Setälä, H., Karim, Z., Mathew, A. P., Mautner, A., Bismarck, A., & Tammelin, T. (2014). Surface modification of nanocellulose membranes using thermoresponsive poly(N-isopropylacrylamide). Abstract from 4th Dissemination workshop of the Nano4water cluster, Stockholm, Sweden.