@article{scholars3018,
            note = {cited By 102},
             doi = {10.1016/j.seppur.2012.02.031},
          volume = {90},
         journal = {Separation and Purification Technology},
           pages = {162--172},
            year = {2012},
           title = {Separation of CO 2 from CH 4 using polysulfone/ polyimide silica nanocomposite membranes},
        keywords = {Asymmetric membranes; Fourier transform infrared (FTIR) spectroscopies; Gas separations; Hybrid membrane; Ideal gas; Mixed gas; Mixed matrix membranes; Permselectivities; Phase inversion techniques; Silica content; Silica nanocomposites; Silica nanoparticles, Carbon dioxide; Fourier transform infrared spectroscopy; Loading; Polyimides; Polysulfones; Scanning electron microscopy; Separation; Silica; Thermogravimetric analysis; X ray diffraction, Gas permeable membranes},
          author = {Rafiq, S. and Man, Z. and Maulud, A. and Muhammad, N. and Maitra, S.},
             url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84858741345&doi=10.1016\%2fj.seppur.2012.02.031&partnerID=40&md5=94404d7ac3afa91f31ee2cfbe6ae29e5},
            issn = {13835866},
        abstract = {Mixed matrix membranes (MMMs) were developed by incorporating inorganic silica nanoparticles into blends of polysulfone/polyimide (PSF/PI) asymmetric membranes for gas separation using phase inversion technique. The membranes were characterized by using scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA). SEM results show different morphologies of surfaces and cross-sections of the membrane where agglomeration is observed at 20.1 wt. silica loading. TGA analysis indicates good thermal stability of the hybrid membranes. Permeation results show that CO 2 permeance increased with the introduction of 5.2 wt. silica contents (73.7 {\^A}{$\pm$} 0.2 GPU) in PSF/PI-20 blend and it increased with the increase in silica contents. With 15.2 wt. silica contents, the highest permselectivity of {\^I}{$\pm$}CO 2/CH 4 = 61.0 {\^A}{$\pm$} 0.3-60.2 {\^A}{$\pm$} 0.4 is observed for treated membrane at 2-10 bar. The selectivity using mixed gas test at various CO 2/CH 4 compositions shows consistent results with the ideal gas selectivity. {\^A}{\copyright} 2012 Elsevier B.V. All rights reserved.}
}