Bioinspired membranes from cellulose nanofibrils

M. Hakalahti*, T. Tammelin, VTT Technical Research Centre of Finland Ltd; E. Kontturi, Aalto University, Finland

Cellulose nanoparticles are potential building blocks for applications requiring hydrophilic and tunable nature, e.g. membrane materials. Cellulose nanofibrils (CNF) stand out as unusual, if not unique building blocks for such constructions with the combination of inherently hydrophilic character, nanoscale structure and high density of hydroxyl groups. Here, we explore the tunability of the material and change its performance with respect to flux by incorporating a thermoresponsive polymer using surface-only modification. Moreover, we explore its humidity-driven and controllable surface architecture and showcase the ion capturing ability of the material in aqueous environments. The work provides new insights into development of materials based on nanoscaled cellulosic materials for membranes and paves the way for utilizing nanoscaled cellulose for capturing particles that escape current filter systems.

Figure 1. Schematic illustration of cellulose nanofribril film functioning as a membrane material.

Session: F7 - Filter Media - Novel Nanofiber Development I
Day: 15 March 2018
Time: 10:45 - 12:00 h

Learn more at FILTECH 2018 - Register Now!