tailieunhanh - Nickel-Nanoclusters-Containing Polyaniline Composites Having Structure Layer-by-Layer: Part I - the Development of Concept and Structural Morphology

The development of concept in structural morphology lets description the location of nickel nanoclusters in conductive organic polymers, which may be a new kind of structure in conductive organic polymer composites family. As a new route, such the development was supported by electrochemical two-pot process, on which polianiline containing nanoclusters of nickel incorporated in layer by layer were prepared, in H2SO4 M solutions. The presence of nickel nanoclusters in polymer matrix and the changes in morphology were confirmed by SEM/EDS | Journal of Chemistry Vol. 42 2 P. 236 - 240 2004 NICKEL-NANOCLUSTERS-CONTAINING POLyANILINE COMPOSITES HAVING STRUCTURE LAyER-By-LAyER PART I - ThE DEVELOPMENT Of CONCEPT ANd STRUCTURAL MORPhOLOGy Received 17-4-2003 TRAN TRUNG TRAN Huu TRUNG Department of Electrochemical Technology and Metal Protection Faculty of Chemical Technology Hanoi University of Technology ABSTRACT The development of concept in structural morphology lets description the location of nickel nanoclusters in conductive organic polymers which may be a new kind of structure in conductive organic polymer composites family. As a new route such the development was supported by electrochemical two-pot process on which polianiline containing nanoclusters of nickel incorporated in layer by layer were prepared in H2SO4 M solutions. The presence of nickel nanoclusters in polymer matrix and the changes in morphology were confirmed by SEM EDS. I - DEVELO PMENT OF CONCEPT Electropolymerization an interesting method has been widely used to prepare conjugated polymers such as polypyrrole polythiophen polyaniline 1 - 3 . Such all conjugated polymers with spatially extended -bonding system found exhibit unique physical and electrochemical properties unobtainable for conventional polymers. And it is very well known that depending on the potential value at the end of the electrosynthesis the polymers have been in various the oxidative states therefore leading to the different physical and electrochemical properties. To improve physical and electrochemical properties conjugated polymers have been modified by incorporation of small size ions Cl- Br- BF NO SO2- etc that ran be. .Ư1 EAL 4 iiV 3 -iv_ 4 ov_ 2 etc. mat can Uv diffusion into and diffusion out polymer matrix 1 - 3 or by incorporation of immobilized organic anions 4 - 6 . On the other way very small size particles in micron or submicron scale of transition metal oxides including MnO2 LiMn2O4 WO3 RuO2 etc. and inorganic polyanions used as dopants .