Synthesis, characterization and antimicrobial evaluation of silver nanoparticles embedded alkyd resin derived from pine seed oil
Keywords:AgNO3, AgNPs, %PVC, Paints, PSO, PSOR.
Silver nanoparticles were synthesized by reducing 0.1mmol silver Nitrate salt with 5ml of neem leaf extract, in an environmental friendly process. The nanoparticles were tested to have strong zones of inhibition on the antibacterial and antifungal isolates; E. Coli, staphylococcus aureus, Aspergillus fumigatus, and mucor species used. UV-visible spectrophotometric analysis was carried out on both the silver nitrate salt and silver nanoparticles, which show bathochromic shift from 221nm (AgNO3) to 440nm (AgNPs). Pine seed oil was condensed to alkyd resin via two step reactions; alcoholysis and esterification reactions respectively, and was characterized by FTIR, acid value and viscometric measurement. Antimicrobial evaluation was carried out on the pine seed oil with its alkyd resin. Pine alkyd resin was used in the formulation of paints with percentage Pigment Volume Concentrations (%PVC) 4 and 5% respectively, and is classified as automotive clearcoat. Chemical resistance, scratch resistance, light fastness, and drying schedule tests were conducted on the paints and are found to exhibit good properties which are similar to commercial paints. Antimicrobial evaluation of the paints incorporated with silver nanoparticles revealed more inhibition zones than those without silver nanoparticles.
 AOCS, (1996). Sampling and analysis of commercial fats and triglycerides. Official Methods of Analysis of the AmericanTriglycerides Chemist Society. 801-855.
 AyoR.G., Audu O.T., and Omupita J.O. (2007). Physico-chemical characterization and cylotoxicity studies of seeds extract of khaya senehalensis (Desr) A. juss. Africa journal of Biotechnology (7), 894-896.
 Kim S.W., S.H, and An Y.J. (2011), Interaction of silver nanoparticles with biological surfaces of caenorhabditis elegans. Ecotoxical Environmental Safety. 77. https://doi.org/10.1016/j.ecoenv.2011.10.023.
 Kirk R.F., and Othmer D.F., (1966) Encyclopedia of Chemical Technology. 2nd Edition, Interscience Publishers, New York, 1, 851 â€“ 85
 Mathiazhagan A., and Rani Joseph (2011), Nanotechnology- A new prospective in organic coating- Review. International Journal of Chemical Engineering and Applications, (2), 225-228. https://doi.org/10.7763/IJCEA.2011.V2.108.
 Maribel G. G., Jean D., and Stephan G., (2009); Synthesis of silver nanoparticles by chemical reduction method and their antibacterial activity, IJCBE, 2-3 M.M Uppal. (2006), Engineering Chemistry 7, Pp 782-783.
 Momodu V.M., Omorogbe S.O., Ikhuoria E.U., Obazee E.O., and Aigbodion A.I., (2011). Synthesis and evaluation of performance characteristics of walnut (Tetracarpidium conophorum ) seed oil- modified alkyd resin. Researcher, 3(7), 63-66.
 Odetoye,T.E , Ogunniyi, D.S. and Olatunji, G.A. (2012) Improving Jatropha curcas Linneaus seed oil alkyd resins, Progress in Organic Coatings, 73 (4) 374â€“381. https://doi.org/10.1016/j.porgcoat.2011.11.016.
 Ogunniyi D.S (2006), Castor oil: A vital industrial raw material. Bioresources Technology, (97), 1086-1091. https://doi.org/10.1016/j.biortech.2005.03.028.
 Oladipo O., Ighodalo C., and Olujinmi M.F., (2013), Formation and characterization of paint based on alkyd resin derivative of Xinenia Americana (wild olive) seed oil. Environment and Natural Resource Research. (3) 53-55. https://doi.org/10.5539/enrr.v3n3p52.Sondi B., alopek S., (2007), Silver nanoparticles as antimicrobial agent: a case study on E Coli as a model for gram negative bacteria, Journal of Colloid and Interface. (275), 177-182. https://doi.org/10.1016/j.jcis.2004.02.012