Morphological effect of fabricated surfaces obtained from fluorinated porphyrin based copolymer for oxygen and pressure sensing applications

Abstract

Good oxygen sensitivity and fast response of oxygen probe is primary requirement for pressure sensing applications. Therefore in this study, porphyrin based new fluorinated oxygen probe (OP) monomer was synthesized and copolymerized with 2-(3-(6-methyl-4-oxo-1,4-dihydropyrimidin-2-yl)ureido)ethyl methacrylate (SCMHBMA), octafluoropentyl methacrylate (OCFPM) and butyl acrylate (BA). SCMHBMA may play important biological role in cell adhesion. OCFPM and BA were used as fluorinated and non-fluorinated monomers, respectively. The synthesized oxygen sensitive copolymer (OSC) was used to fabricate spin coated film and membranes of electrospun beaded nanofibers and only nanofibers. Morphological effect of fabricated surfaces was evaluated in terms of oxygen sensitivity, response time and pressure sensitivity. The surface of beaded nanofibers was considered transition state between plain spin coated films surface and fibrous membrane. Nanofibers membrane showed highest oxygen sensitivity (I0/I 36.7) and pressure sensitivity (0.92 %) among all the surfaces. Moreover, nanofibers membrane exhibited fast response to oxygen (t95% 0.6 s). Moreover, the electrospun nanofiber membrane was found biocompatible by inherent culture of HeLa cells. Hence, the fabricated membranes may find applications in pressure mapping of biological systems and unsteady surfaces.