Mesoporous Material: PANI/Na-AlMCM-41 a Novel Semiconductor Nanocom-posite

MARCOS B. GÓMEZ COSTA; OSCAR A. ANUNZIATA

Huerta Grande, Córdoba

Taller; V Taller Iberoamericano en Ciencia e Ingeniería de Materiales (V TIECIM); 2006

UNS

Mesoporous molecular sieves type MCM-41 with a hexagonal packed array of channels and a narrow pore size distribution and zeolites (such as NaY zeolite) offer unique opportunities for the preparation of new nanostructure composite materials. In this sense, the study of aniline adsorption and polymerization on MCM-41 and the zeolite Y is important. The FTIR analysis of adsorbed aniline on NaY zeolite shows the characteristic bands ascribed to N-H2 bending, two C-C ring stretching at 1630-1633, 1604 and 1495 cm-1 respectively, similar to the adsorbed aniline results on Na-AlMCM-41 host. Mainly aniline molecules would be bound through weak ð interactions onto the structure of Na-AlMCM-41. In contrast, we suggest that, the organic molecules hold by unpaired electrons of N of the aniline amino group and NaY microstructure. If water is co-adsorbed two possible modes of adsorption have been identified in Na-AlMCM-41 whereas, the NaY zeolite shows an intense band at 1640 cm-1 which is characteristic of water adsorbed on the material. Aniline interaction with zeolite NaY is stronger than aniline-MCM nanomaterial. Polyaniline (PANI) nanocomposites have the potential to produce a change on a variety of applications ranging from general circuits, microelectromechanical systems (MEMS) to supercapacitors and sensors. In this work, we studied the aniline polymerization on a mesoporous Na-AlMCM-41 that conferred semiconducting properties to the nanocomposite. These results are a contribution to the nanomaterials field.  Thus, the goal of the present work is to synthesize PANI/Na-AlMCM-41 composites using an in-situ polymerization technique in order to contribute the understanding of the aniline adsorption mode onto de host. This would allow to design conducting nanowires based on PANI.