By adding nanoparticles as a nucleating agent, foams of similar cell size and density can be produced at a much lower foaming pressure, which could open up a new route to produce microcellular foams.

In situ polymerization method provided the best dispersion and the resulting nanocomposite foam had the finest cell size and the highest cell density. In addition, adding nanoparticles as a nucleating agent can make foams of similar cell size and cell density at a much lower foaming pressure.

Srinivasan Raman

For good retention of a nanomaterial in a foam, a strong intermolecular or chemical interaction between the foam material and the surface of the nanomaterial is necessary. That's all that can be advised from the text of your question. For clarification, a chemical characterization of the nanomaterial and the contents of the foam is needed.

We are using melamine foam and fillers like CNT, polyaniline etc.. if we dip the foam in the solution and then dry, the filler materials fall off from the foam.. we are trying to stop this spillage.. if they come out, the conductive network would be gone and we won't get paths for electrical conduction..

Srinivasan Raman

Melamine foam molecules contain amine groups. Therefore, it is a base. Therefore, fillers can be nanoparticles or macroparticles of graphene oxide with carboxyl acidic groups, polymers, for example, polystyrene sulfonic acid and other substances with acidic functional groups. Then there will be a chemical interaction between the base and the acid.