This is a complex question since it is necessary to define some important factors previously; the kind of nanocomposite; the kind of polymer, and the target application. Probably, the most simple method encompasses the use of acrylic monomers polymerized/crosslinked using some initiators and crosslinkers in presence of the nanofillers (e.g., inorganic or organic nanoparticles). The definition of the cost is also relevant to choose a method. These papers can be helpful: Article Superabsorbent Hydrogel Composites with a Focus on Hydrogels...
Article Recent advances on composite hydrogels designed for the reme...