Hybrid Membranes of Polyamide Applied in Treatment of Waste Water

• Published in: Materials research (São Carlos, São Paulo, Brazil) São Paulo, Brazil), 2017-03, Vol.20 (2), p.308-316
• Main Authors: Medeiros, Keila Machado de, Araújo, Edcleide Maria, Lira, Hélio de Lucena, Lima, Diego de Farias, Lima, Carlos Antônio Pereira de
• Format: Article
• Language: English
• Subjects: Calcium chloride; Differential scanning calorimetry; ENGINEERING, CHEMICAL; Fourier transforms; Infrared spectroscopy; Intrusion; MATERIALS SCIENCE, MULTIDISCIPLINARY; Melt temperature; Membranes; METALLURGY & METALLURGICAL ENGINEERING; Montmorillonite; phase inversion; polyamide; Polyamide resins; porogenic agent; Scanning electron microscopy; Spectrum analysis; Wastewater treatment; X-ray diffraction
• ISSN: 1516-1439; 1980-5373; 1980-5373
• DOI: 10.1590/1980-5373-mr-2016-0242

In this work, it was prepared hybrid membranes of polyamide6 (PA6) with montmorillonite (MMT) and porogenic agent (CaCl2). The hybrid membranes with CaCl2 were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), porosimetry by mercury intrusion (PMI), flux measurements and rejection. By means of X-ray diffraction, it was revealed that the hybrid membranes with CaCl2 have an exfoliated and/or partially exfoliated structure. For FTIR and DSC of hybrid membranes with CaCl2, it was found that the spectra and the crystalline melting temperature remained virtually unchanged compared to PA6 membrane. From the SEM images, it was observed that the addition of the MMT and the CaCl2 in the membrane of PA6 caused an increase in the amount of pores the surface and cross section of these membranes. By PMI, it was observed that the presence of MMT and CaCl2 in the membrane caused an increase in the average diameters of pores. The water-oil separation tests, indicated a significant reduction of oil in the permeate, allowing treatment of wastewater contaminated with oil.