@article{scholars14464,
            year = {2021},
         journal = {Ceramics International},
       publisher = {Elsevier Ltd},
           pages = {25883--25894},
          number = {18},
            note = {cited By 7},
          volume = {47},
             doi = {10.1016/j.ceramint.2021.05.319},
           title = {Synthesis and characterization of superoleophobic fumed alumina nanocomposite coated via the sol-gel process onto ceramic-based hollow fibre membrane for oil-water separation},
             url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85108194162&doi=10.1016\%2fj.ceramint.2021.05.319&partnerID=40&md5=e0462aece1bec21f53919377e17f6689},
        keywords = {Alumina; Aluminum oxide; Ceramic membranes; Chemical stability; Chlorine compounds; Contact angle; Effluent treatment; Effluents; Field emission microscopes; Fourier transform infrared spectroscopy; Nanocomposites; pH; Scanning electron microscopy; Separation; Sol-gel process; Surface chemistry; Wastewater treatment; X ray photoelectron spectroscopy, Coating cycles; Dip coating; Hollow-fibre membrane; Oil/water separation; Perfluorooctanoate; Polydiallyldimethyl ammonium chloride; Sol'gel; Stark membrane hollow fiber; Superoleophobic; Synthesis and characterizations, Coatings},
        abstract = {Oily wastewater treatment is a global challenge due to the substantial amount of effluent resulted from many industrial and domestic activities. To overcome the challenge of using existing treatment approach and fouling, superoleophobic coatings were fabricated. In this study, a superoleophobic membrane surface was obtained using the sol-gel technique with perfluorooctanoate (PFO), poly (diallyl dimethylammonium chloride) (PDADMAC), and nanoparticles as complex-polymer nanocomposites. The effects of coating cycles on the surface structure, chemical properties, surface chemistry, and oleophobicity of the surface were examined using field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and oil contact angle measurement. The results showed that the coated layer successfully adhered to the substrate surface. However, the chemical stability with respect to oil contact angle (OCA) revealed a decline at pH 7 and pH 9 and maintained stability at pH 3. Besides, oil flux at 63.0 L/m2. h was achieved for PDADMAC-Al2O3/44 wt PFO and the highest separation efficiency of 98 was obtained. Furthermore, the oil rejection decreases as the oil concentration increases from 1 to 3 g/L. OCA of 155{\^A}o was obtained after 5 coating cycles. Apart from mitigating substrate fouling, the superoleophobic and superhydrophilic coating can be applied to a ceramic-based hollow fibre membrane and efficiently used for the separation of oil from oily wastewater. {\^A}{\copyright} 2021 Elsevier Ltd and Techna Group S.r.l.},
          author = {Raji, Y. O. and Othman, M. H. D. and Sapiaa Md Nordin, N. A. H. and Adam, M. R. and Mohd Said, K. A. and Ismail, A. F. and Rahman, M. A. and Jaafar, J. and Farag, T. M. and Alftessi, S. A.},
            issn = {02728842}
}