Aqueous friction behavior of swollen hydrophilic poly(ethylene glycol)-based polyurethane coatings
The macroscopic friction behavior of water-swollen cross-linked poly(ethylene glycol)-based polyurethane coatings (PEG-based PU coatings) with varying PEG precursor mass was measured against a glass counter surface.
Experimental data such as the water uptake and the indentation modulus are used to calculate an accurate value for the molar mass between cross-links Mc, which, in turn, is used for the estimation of the actual coating mesh size ξ.
Friction, swelling and indentation data
The friction, swelling and indentation data obtained are used to successfully deduce an empirical model for the quantitative description of the aqueous friction behavior of these coatings depending on the mesh size of the coatings and the sliding velocity only.
The study has been published in Journal of Materials Science, Volume 56 (2021).
