Contact
    Start Publications From superhydrophilic to superhydrophobic polymer-nanoparticles ...
    ←  Publication Finder
    Attension

    From superhydrophilic to superhydrophobic polymer-nanoparticles coated meshes for water-oil separation systems with resistance to hard water

    Year: 2020

    Journal: J. Pet. Sci. Eng., Volume 194, NOV

    Authors: Sosa, Mariana D.; Canneva, Antonela; Kaplan, Andrea; D'Accorso, Norma B.; Martin Negri, R.

    Organizations: CONICETConsejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET); YTEC; UBA (UBACyT project) [20020150100079BA]; Ministry of Science, Technology and Innovations (MINCYT-FONCYT, Argentina) [PICT 2011-0377]; Bilateral Project CONICET-SNSF (Swiss National Science Foundation, Switzerland)Swiss National Science Foundation (SNSF) [CONICET 1084/17]

    Keywords: Oil-water separation; Polymers; Composites; Nanostructure; Superhydrophobic membranes

    A one-step procedure is presented for developing novel superhydmphobic oil-water separation membranes, based on composites of nanoparticles and polymers. The combination of hydrophilic particles with hydrophobic polymers allows obtaining superhydrophobic coatings on metal meshes, with chemical and physical stability. The methodology consists of coating SiO2 hydrophilic nanoparticles with two hydrophobic polymers (polydimethylsiloxane and polyvinylidene fluoride, PDMS and PVDF, respectively) on metal meshes. The nanoparticles generate roughness in the nanoscale, while the combination of PVDF and PDMS provides hydrophobicity, chemical resistance, and reinforce of mechanical properties. Membranes were characterized by XPS, SEM, TEM, FTIR, TGA, water-contact-angles (WCA) measurements, and elongation tests. The membranes present oil flux in the order of 10(2) Lm(-2) s(-1), with stable performance during several months for water/oil separation tests when using saline (Na+, Cl-) and hard water (Ca+2, Mg+2) solutions. The synergetic mixture of three components, PDMS-PVDF-SiO2, provides superhydrophobic behaviour while coatings formed by any combination of only two components do not show the targeted properties.
    View publication