Compressibility of porous TiO2 nanoparticle coating on paperboard
1 Laboratory of Paper Coating and Converting, Center for Functional Materials, Åbo Akademi University, Porthansgatan 3, Turku FI-20500, Finland
2 Paper Converting and Packaging Technology, Department of Materials Science, Tampere University of Technology, P.O. Box 589, Tampere FI-33101, Finland
3 Aerosol Physics Laboratory, Department of Physics, Tampere University of Technology, P.O. Box 692, Tampere FI-33101, Finland
Nanoscale Research Letters 2013, 8:444 doi:10.1186/1556-276X-8-444Published: 25 October 2013
Compressibility of liquid flame spray-deposited porous TiO2 nanoparticle coating was studied on paperboard samples using a traditional calendering technique in which the paperboard is compressed between a metal and polymer roll. Surface superhydrophobicity is lost due to a smoothening effect when the number of successive calendering cycles is increased. Field emission scanning electron microscope surface and cross‒sectional images support the atomic force microscope roughness analysis that shows a significant compressibility of the deposited TiO2 nanoparticle coating with decrease in the surface roughness and nanoscale porosity under external pressure.
61.46.-w; 68.08.Bc; 81.07.-b