Friday, November 6, 2009
Mezzanine (Camino Real Hotel)
Molecular imprinting is a template technique for the production of materials with specific recognition sites for a targeted molecule. Such material can be used in separation process of the target from a bulk mixture. The present work reported preparation of molecular imprinted polymer (MIP) spheres with adsorption selectivity to Bisphenol A (BPA), which was known as a water-soluble chemical found as endocrine system. Micro size MIP spheres were prepared using Bisphenol A dimethacrylate and Divinylbenzene (DVB) as cross-linker at 13500 rpm stirring in water and in aqueous acetone or ethanol solvent at 300 rpm. The resultant spheres were hybridized with polyethersulfone scaffold to be molecular imprinted membranes for separation of BPA derivatives. Mixing BPA-MIP powder and the scaffold was in N-methyl-2-pyrrolidone, spreading over on a glass plate and then immediately coagulating in water for preparation of membrane. It was observed that the MIP spheres with binding toward BPA from Bisphenol bulk mixture appeared in the membrane scaffold as adsorbent. It was also confirmed by HPLC that the resultant imprinted membranes showed permselective binding of BPA with high separation factors.