Photonic crystals in biology - NanoTR-VI

PPoster Session, Thursday, June 17Theme F686 - N1123Preparation of Nano-Silver Containg Uv-Curable, Abrasion And Flame Resistant NanocompositeCoatings And Investigation of Their Antimicrobial Properties111URaife Deniz TokerUP P* , Nilhan Kayaman ApohanP P, Mehmet Vezir KahramanP1PDepartment of Chemistry, Marmara University, 34722 Goztepe , Istanbul, TurkeyAbstract- Nano-sized silver or silver salts containing nanoparticles, due to their larger surface area compared to microparticles, interact withbacteria and viruses more quickly and give reaction. In this study was to prepare UV-curable abrasion and flame resistant nanocompositecoatings having antimicrobial properties. The hybrid coating formulations with various sol-gel content were applied on to Polycarbonatepanels and were hardened by UV irradiation. In addition, the free films were prepared by pouring the formulations into a Teflon® mold. Toinvestigate the antimicrobial effect of Ag on the coating, nano-sized Ag containing nanocomposite coatings were prepared. The chemical29structure of hybrid coatings was characterized by FT-IR and PPSi -NMR techniques. Thermal and mechanical properties of the coatings weredetermined. Abrasion, hardness, gloss, and adhesion tests of the materials were performed. SEM and AFM investigation were made fordetermining the size of the Ag nanoparticles. The growth of Gram-positive Staphylococcus aureus and Gram-negative Escherichia colibacteria on the prepared plates was examined.Polymers containing the phenyl phosphine oxide grouphave been studied extensively for a number of applications inrecent years .Among them , phosphorus containing polymersshowed significant improvement in flame retardancy of thenanocomposite. Phosphine oxide moiety provides a stronginteracting site for imparting miscibility with several system.Connell and co-workers at NASA longly have developed aseries of phenyl phosphine oxide containing polymers fordurability in space environments [1,2].Metal nano materials like cooper, gold , zinc , titanium ,silver, magnesium show good antibacterial properties becauseof their large suface area but silver nanoparticals effecantcyagainst bacteria , viruses , and other eukaryotic microorganizm.[3]Inreen years , the synthesis of organic-inorganic hybridmaterialshave attracted considerablethe desired propertiessuch as; abrasion, impact resistance, thermal stability etc.[4]The sol gel route is the most commonly applied method forthe preparation of organic-inorganic hybrid at nano, micro –scale.In this study in the first stage; bis (4-methylphenyl)methylphosphine oxide was obtained from the reaction ofdichlorophosphine oxide and p-bromofluorobenzene. Then,after a series of progressive reactions, synthesis oftrimethoxysilane end-capped bis[(4- -hydroxyethoxy)phenyl] methyl phosphine oxide urethane was performed.Figure 2. AFM and SEM micrograph of the silver nanoparticles incompositeTo investigate the antimicrobial effect of Ag on the coating,nano-sized Ag containing nanocomposite coatings wereprepared. Thermal and mechanical properties of the coatingswere determined. Abrasion, hardness, gloss, and adhesiontests of the materials were performed. SEM and AFMinvestigation were made for determining the size of the Agnanoparticles. The growth of Gram-positive Staphylococcusaureus and Gram-negative Escherichia coli bacteria on theprepared plates was examined.*Corresponding author: HTdeniztoker84@hotmail.comTFigure 1. bis[(4- -hydroxyethoxy)phenyl] methyl phosphineoxideurethaneAnd by adding spesific ratios of methacryloxypropyltrimethoxysilane (MPTMS), a mixture was prepared wheresol-gel technique was used. In the second stage, urethaneacrylate based oligomers from IPDI, HEMA and PPG400were synthesized and in the third stage, silver nanoparticleswere synthesized by using AgNOR3R.The hybrid coating formulations with various sol-gelcontent were applied on to Polycarbonate panels and werehardened by UV irradiation. In addition, the free films wereprepared by pouring the formulations into a Teflon® mold.[1] Connell JW, Smith Jr JG, Hergenrother PM. Polymer1995;36:5e11;[2] D.J. Riley, A. Gungor, S.A. Srinivasan, M. Sankarapandian, C.Tchatchova, M.W.Muggli, T.C.Ward, J.E. McGrath, Polym. Sci.Eng. 37 (1997) 9.[3] Frattini A, Pellegri N, Nicastro D, de Sanctis O. Mater ChemPhys 2005;94:148.[4] G. Kickelbick, Prog. Polym. Sci. 28 (2003) 114.6th Nanoscience and Nanotechnology Conference, zmir, 2010 710