Progress of conductive polypyrrole nanocomposites

The hybridization of conductive polymers (CPs) with other nanomaterials is one of the effective ways to improve their electrical, optical, mechanical, and biological properties. The review reports the types, synthesis methods, physical and chemical properties, potential applications, and the prospect of future polypyrrole (PPy) nanocomposites. PPy nanocomposites can be classified into four types according to their composition: PPy/carbon series nanocomposites, PPy/ inorganic nanocomposites,PPy/organic nanocomposites and PPy multicomponent nanocomposite. The main synthesis methods of PPy nanocomposites include in situ chemical/electrochemical oxidation, electrochemical deposition, template method, interfacial polymerization, electrospinning, freeze drying and so on. Based on its high electrical conductivity and chemical properties, the applications of PPy nanocomposites in the field of energy storage, biomedicine, adsorption and impurity removal, electrocatalysis, wave-absorbing materials, sensors and corrosion protection are presented, which focus on recent literature. Finally, the perspectives on the challenges and opportunities in this emerging area of research are presented.