Abstract book - Prof. Per Jensen, Ph.D. - Bergische Universität ...

188 Poster session, J25Preparation and Characterization of Modified Bio-Polymer asBio SensorOsama Osman, Abdel Aziz Mahmoud, Medhat Ibrahim, and Ahmed RefaatSpectroscopy Department, National Research Center, 12311 Dokki, Cairo, Egypt,Email: medahmed6@yahoo.comThis work is conducted to enhance the surface properties of some bio-polymers usingmolecular spectroscopy. Different ratios of bio-polymers were subjected to quantummechanical calculation. Calculated data indicates that blending of two polymers such asstarch, chitosan and gelatin leads to the formation of hydrogen bonding. Based uponmodeling data blends were formed following casting method. FTIR results ensure theformation of hydrogen bonding which dedicates the prepared blends for interaction withwide range of molecules specially those of NH 2 and COOH terminals. As a result ofincreasing starch and gelatin in chitosan composites HOMO-LUMO energy slightlydecreased while total dipole moment increased. UV-Vis spectroscopy indicated thesuitability of chitosan/starch blend as bio sensor. Another enhancement in the sensingperformance of chitosan/starch composite was achieved by introducing nano sized TiO 2into the blend. AFM indicates the surface morphology of the modified blend. Theresults are supported and emphasized with mechanical measurements.Osman O.Mahmoud A.A.Ibrahim M.Refaat A.