• Mrs Deepali P Butala

In the present work we report the synthesis of zinc oxide nanoparticles(ZnO-NPs) and its composite with the the polymer. Zinc oxide nanoparticles were prepared using zinc nitrate and sodium hydroxide by wet chemical synthesis. These nanoparticles were characterised by FTIR, XRD, SEM and EDAX. The particle size determined from XRD by using Debye Scherrer's formula was compared with the particle size obtained by SEM. These particles were checked for its antimicrobial activity for two Gram negative bacteria i.e. Proteus mirabilis and E coli; two Gram positive bacteria S albus and S faecalis and two fungi viz. A niger and Candida albicans. The nanoparticles were found to be inhibitory for E coli and S albis. The polymer considered was Polyaniline. Polyaniline was prepared from the monomer aniline by chemical oxidative method using ammonium persulphate as oxidant. These nanoparticles were used to prepare Polyaniline-ZnO nanocomposite. This composite of ZnO nanoparticles and polyaniline was studied for its potential as antimicrobial agent to be applied in dentistry and lotions. The polyaniline nanocomposite filled with ZnO nanoparticles were prepared by chemical oxidative method in acidic medium using ammonium persulphate as an oxidant. The composition, morphology and structure of the nanoparticles and nanocomposite were characterised by FTIR, XRD, SEM and TGA. Scanning electron microscopy (SEM) characterization of the composite morphology reveals a homogeneous distribution of the ZnO NP throughout the film for applied NP/polymer ratio. The optical properties of the embedded NP are not affected by the matrix The characteristic FTIR peaks of PANI were found to shift wave number in PANI–ZnO composite due to formation of H-bonding. These observed effects have been attributed to interaction of ZnO nanorods with PANI molecular chains. These nanoparticles and nanocomposites were then studied for its antimicrobial applications against both the Gram positive and Gram-negative species. The nanocomposite exhibits bactericidal behaviour towards Escherichia coli (E. coli), S faecalis, S albis and the fungii, A niger, Candida albicans.

Zinc oxide, polyaniline, nanocomposite, SEM, TEM, XRD, Antimicrobial

"COMPARATIVE STUDY OF ANTIBACTERIAL APPLICATIONS OF ZINC OXIDE NANOPARTICLES AND POLYMER NANOCOMPOSITE.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.101-105, MAY-2019, Available :http://www.jetir.org/papers/JETIRCM06027.pdf

"COMPARATIVE STUDY OF ANTIBACTERIAL APPLICATIONS OF ZINC OXIDE NANOPARTICLES AND POLYMER NANOCOMPOSITE.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp101-105, MAY-2019, Available at : http://www.jetir.org/papers/JETIRCM06027.pdf