Desenvolvimento de nanorecobrimentos retardantes de chama à base de silício

Abstract

The present work consisted in the study of the modification of the synthetic, natural and mixed fabric surface by hexamethyldisiloxane (HMDSO) plasma and HMDSO combined with carbon dioxide (CO2) plasma. The treatments were performed by the chemical vapor deposition technique (PECVD). The techniques used in the characterization of the films were: scanning electron microscopy (SEM), atomic force microscopy (AFM), Fourier transform infrared spectroscopy (FTIR), contact angle measurements, thermogravimentric analysis (TGA) and visual tests of flammability. The different treatments performed by HMDSO and HMDSO combined with CO2 plasma changed the surface of the fabrics, making them hydrophobic, with contact angles bigger than 100o . Plasma treatment of HMDSO generated a film with granules in nanometric dimensions, presenting a single phase, whereas plasma treatment of HMDSO combined with CO2 resulted in a film with even smaller granules, presenting two distinct phases. The fabrics treated by HMDSO and HMDSO combined with CO2 plasm showed higher flame resistance than untreated tissues.