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Open Access Nano Express

Compressibility of porous TiO2 nanoparticle coating on paperboard

Milena Stepien1, Jarkko J Saarinen1*, Hannu Teisala2, Mikko Tuominen2, Janne Haapanen3, Jyrki M Mäkelä3, Jurkka Kuusipalo2 and Martti Toivakka1

Author Affiliations

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

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Nanoscale Research Letters 2013, 8:444  doi:10.1186/1556-276X-8-444

Published: 25 October 2013

Abstract

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.

PACS

61.46.-w; 68.08.Bc; 81.07.-b