NOVELTY - Polymer nanocomposite comprises: either a polymer, a first liquid phase exfoliated pristine nanomaterial including a first morphology, and a second nanomaterial including a distinctly different particle morphology than the first nanomaterial; or a liquid phase co-exfoliated mixture of pristine nanomaterials in a highly exfoliated state comprising two or more distinctly different particle morphologies.    USE - The polymer nanocomposite is useful: in protection against static electricity; as an electrical shielding material; for printed wiring; for electromagnetic shielding including radio frequency shielding and electromagnetic interference shielding; in batteries; in photoelectric devices including solar cells; for preparing fibers to produce textiles and ropes; for preparing activated carbon filters; for preparing rubber including tires; and as a synthesis scaffold for building biological materials including chemical or biological syntheses.    ADVANTAGE - The polymer nanocomposite exhibits improved mechanical properties including electrical conductivity, thermal conductivity, strength and heat resistance, gas/vapor barrier properties, magnetic properties, elasticity and optical properties (e.g. color), thus preparing fibers with high strength, resiliency and elasticity.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) a solution or stable dispersion comprising the first liquid phase exfoliated pristine nanomaterial and the second nanomaterial;    (2) making the polymer nanocomposite containing a solvent co-exfoliated mixture of nanomaterials comprising exfoliating the first nanomaterial by liquid phase exfoliation and solvent exfoliation to produce a first solution or stable dispersion of the first nanomaterial, exfoliating the second nanomaterial having a different particle morphology than the first nanomaterial with the first liquid phase or stable dispersion of the first nanomaterial to provide a second liquid phase or stable dispersion containing the first and second nanomaterials in a highly exfoliated state, introducing the second solution or stable dispersion into a monomer or polymer matrix, and removing solvents from the matrix to provide a polymer nanocomposite; and    (3) the polymer nanocomposite produced by the method.