Polymeric-Based Conducting Nanocomposites: Controlling the Distribution of the Conductng Phase

摘要

The optimization of bulk properties of polymeric based nano- and mesoscale composites require the ability to spatially control phase distribution. In this study, electrical conductivity is introduced by incorporation of a metal precursor via infiltration into the polymer host and subsequent conversion in-situ by a reducing agent, templating the morphology of the polymer matrix. Distribution of nano- and mesoscale metal particles in isotropic and anisotropic swllen polymer hosts is discussed relative to metal precursor and reducing reagent diffusion and their insitu bimolecular reduction reaction. The swelling and infiltration procedure employed to from the composites is generally applicable to rigid-rod, semi-flexible and flexible polymer matrices and not restricted to special synthesis of metal containing or complexing polymers. As an example, high-performance rigid-rod polyme fibers containing an interpenetrating network of polymer microfibrils and silver are produced with d.c. conductivities in excess of 10~4 S.cm and tensile strength at least 200 times that of pure silver