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Abstract: Molecular imprinting is a means of introducing sites of specific molecular arrangement into an otherwise uniform polymeric matrix. This is achieved by formation of a pre-polymerization complex between complementary monomers and the template molecule. The present study reports the functionalization of multiwalled carbon nanotubes (MWCNT) with vinyl groups through nitric acid oxidation along the reaction with allyl alcohol. MWCNT based imprinted polymer (MWCNT-MIP) was synthesized by means of methacrylic acid (MAA) as the monomer, ethylene glycol dimethacrylate (EGDMA) as the crosslinker, α,α- azobisisobutyronitrile (AIBN) as the initiator and uracil (U), molecule as the template. The prepared material was characterized by means of FT-IR, XRD, SEM and TGA analysis. Adsorption capability attained saturation in 3 h. The kinetic information was found to follow second order model, indicating chemisorption. The strong conformity of equilibrium data with the Langmuir isotherm model confirms the monolayer coverage of uracil on the MWCNT MIP surface.
Template and target information: uracil, U
Author keywords: multiwalled carbon nanotube, adsorption, uracil, isotherm, Desorption