Nanoparticle modification and their utilization in the modification of planar substrates were examined. Emphasis was placed on controlling the layer structure during formation and alteration of the wetting characteristics of the modified surfaces. Layer formation was investigated by monitoring adsorption of nanoparticles on to a nanofibrillated cellulose substrate using a quartz crystal microbalance with dissipation monitoring. Modification of the nanoparticles was conducted by treatment with oppositely charged substances. A combination of the modified nanoparticles and a hydrophobic emulsion resulted in a sufficiently stable nanostructure able to change the wetting characteristics of a planar substrate. The coatings consisted of a thin nanoparticle structure with evenly distributed particles. A layer consisting of inexpensive particles allowing simple surface modification could be used to functionalize planar substrates and to enable the use of paper as a sustainable substrate, even in applications beyond its traditional use.

Surface modified nanoparticles for ultrathin coatings

243rd National Meeting (2012)

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