Modificação da superfície do polidimetilsiloxano (PDMS) para aplicação biomédica

Abstract

This work proposes a comparative study between different gases seeking to modify the surface by plasma etching of a polymeric biomaterial (polydimethylsiloxane) widely used as a dressing base. This biomaterial has excellent mechanical properties, gas permeability and biocompatibility, however it presents some problems such as its hydrophobicity, causing problems with bacterial adhesion. To optimize the application of this polymeric biomaterial, the plasma etching technique is used to temporarily modify the polymer surface, and for its evaluation, morphological and physicalchemical analyzes, such as the contact angle, roughness and field emission gun scanning electron microscopy (SEM-FEG), in order to evidence the best composition for modifying the polydimethylsiloxane surface. The surface energy of the polydimethylsiloxane is directly related to the roughness and deformations observed on the surface of this material, causing the film treated by plasma etching to have its morphology permanently modified, which does not regenerate to its original state. However, the modification of the surface it doesn?t become enough to characterize this film as hydrophilic. [resumo fornecido pelo autor]