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Nanoscale Res Lett. 2013 Oct 25;8(1):444. doi: 10.1186/1556-276X-8-444.

Compressibility of porous TiO2 nanoparticle coating on paperboard.

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  • 1Laboratory of Paper Coating and Converting, Center for Functional Materials, Åbo Akademi University, Porthansgatan 3, Turku FI-20500, Finland. jarkko.j.saarinen@abo.fi.


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.

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