Described herein is a hydrogel-containing multilayer article and methods of making, said hydrogel-containing multilayer article comprising: (i) a polymeric substrate comprising an abstractable atom； and (ii) a cured aqueous coating composition thereon wherein the coating composition comprises: (a) a hydrophilic monomer comprising a (meth)acrylamide, (meth)acrylate, and combinations thereof: (b) at least 2 wt% of a water-swellable clay； (c) a water-soluble type I photoinitiator； and (d) an acid or salt wherein a water insoluble type II photoinitiator is localized at the interface between the hydrogel coating and the polymeric substrate.
