MLYNÁŘOVÁ Pavla VSB - Technical University of Ostrava

Properties of Polyaniline/Montmorillonite Thin Films in Dependence of Preparation Temperature


The nanocomposite materials based on conducting polymers are of interest in a wide range of applications in many fields, such as corrosion protection, electroluminescence, energy storage systems, and sensors. Our work deals with the polyaniline/montmorillonite (PANI/MMT) nanocomposite thin films deposited on glass slides. Our PANI/MMT thin films contain no other components like additional polymeric carriers or binders. We focused on how different preparation temperatures affect the thickness, morphology and electrical conductivity of PANI/MMT nanocomposite films. Advantage of the MMT is a layered structure with strong tendency to create platy particles. This arrangement significantly affects the ordering of PANI chains, i.e. the PANI nanostructure. In the nanocomposite structure, PANI chains are present both on the surface and in the interlayer space of the MMT. The non-bond interactions between PANI chains and MMT can result in improved mechanical, thermal, and optical properties of the nanocomposite. A simple method was used for the preparation of nanocomposite PANI/MMT thin films. One-step polymerization of anilinium sulfate in the presence of appropriate amount of MMT particles (size fraction <5 µm) has been used to prepare PANI/MMT nanocomposite thin films. Water solution of anilinium sulfate (as a precursor) was mixed with the ammonium peroxydisulfate (as an oxidizing agent) in presence of glass slide at different temperatures. Two following temperatures were used: 10°C and 20°C.