Thermal study of plane membranes obtained from polyamide66/bentonite clay nanocomposite

nanocomposites of polyamide66 (PA66) membranes with 3% of treated (organophilic) and untreated bentonite clay, they were obtained by solution. The production of the membranes was accomplished using the technique of phase inversion. The membranes were characterized by differential scanning calorimetry (DSC), thermogravimetry (TG) and X-ray diffraction (XRD). For DSC, it was observed that 1 and 3% treated clay (ACT) added in polymer matrix practically no change in melting temperature and apparently there was no degradation of the polyamide66 matrix. Also from TG, it can be observed that in general the membranes of PA66 with organoclay, the decomposition were higher compared with the untreated clay (AST), thus revealing a greater thermal stability of membranes prepared with PA66 and treated clay. Through the diffractogram of X-rays, it was revealed that the membranes presented inserted structure and/or exfoliated partially. (author)