Desenvolvimento de substratos de polipropileno isotático com superfície quimicamente modificada para aplicações biotecnológicas

Abstract

The chemical modification of polypropylene (PP) films can be explored for the preparation of materials with innovative properties. Polypropylene is one of the most consumed polymer in the world, this fact is due to the low cost and the good bulk properties of the PP, however, polypropylene has a hydrophobic surface and low reactivity. The preparation of materials with suitable bulk and surface properties had been wanted for join values to PP, making possible its use in technologic and biomedical areas. Seeking the application of these materials, it was developed some strategies for the modification of polypropylene films through of functional groups attaching onto the surface of PP by chemical modification. Onto polypropylene surface functionalized with maleic anhydride was synthesized with maleimides groups. The maleimide groups covalently attached on PP surface were used as photopolymerization initiator for acrylamide, Nisopropylacrylamide and glycidyl methacrylate. From poly(glycidyl methacrylate) functionalized surface, quaternary amine salt were synthesized with a potentialy bactericidal surface containing immobilized enzymes like alcohol dehydrogenase. The steps of surface modification of PP were characterized by Fourier transform infrared spectroscopy with attenuated total reflectance technique (FTIR-ATR), energy-dispersive X-ray spectroscopy (EDS), contact angle measurements of water drops and the morphological characterization was made by both scanning electronic microscopy (SEM) and atomic force microscopy (AFM).