Contact
    Start Publications Modifying the Wettability of Surfaces by Nanoparticles: ...
    ←  Publication Finder
    Attension

    Modifying the Wettability of Surfaces by Nanoparticles: Experiments and Modeling Using the Wenzel Law

    Year: 2010

    Journal: Langmuir, 2010, 26 (18), pp 14563–14566, 20111221

    Authors: Lei Dong*†, Tiina Nypelö‡, Monika Österberg‡, Janne Laine‡, and Mikko Alava†

    Organizations: † Department of Applied Physics, P.O. Box 14100 and ‡ Department of Forest Products Technology, P.O. Box 16300, Aalto University, FIN-00076, Finland

    The control of the wettability by nanoparticles (NPs) was studied by treating lignin model surfaces with silica NPs at various NP concentrations. The experimental contact angles (CAs) were compared to a modified Wenzel equation, which takes into account the changes in the effective surface area and the surface roughness. The conclusion was drawn that the change of effective roughness is not visible, which implies that the NP-induced geometric heterogeneity is irrelevant for the CA change. This is attributed to dynamics of contact line in the weak pinning regime.