title: Preparation, characterization and performance of poly(m-phenylene isophthalamide)/organically modified montmorillonite nanocomposite membranes in removal of perfluorooctane sulfonate.
abstract: Nanocomposite membranes containing poly(m-phenylene isophthalamide) (PMIA) and organically modified montmorillonite (OMMT) were prepared by a combination of solution dispersion and wet-phase inversion methods, and the effects of OMMT addition on the properties and performance of fabricated nanofiltration membranes were investigated. The membranes were characterized by contact angle measurements, scanning electron microscopy (SEM), atomic force microscopy (AFM), thermogravimetric analysis, and zeta potential. The performance of the membranes was elucidated by the removal of perfluorooctane sulfonate (PFOS) at neutral pH. Increasing OMMT concentration improved the thermal stability and hydrophilicity of the membranes. The permeation and rejection of PFOS were significantly improved. The performance of fabricated nanofiltration membranes in removal of PFOS varied depending on the solute and membrane properties as well as solution conditions. Finally, a comparison between fabricated membranes and a commercial NF membrane (ESNA1-K1, Hydecanme) proved that the OMMT addition is a convenient procedure for producing nanocomposite membranes with superior properties and performance.
authors: Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, China; State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
authors: Qin
authors: Q
authors: Luo
authors: Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, China.
authors: Yanxia
authors: Y
authors: Liu
authors: Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, China. Electronic address: liuguixia22@163.com.
authors: Guixia
authors: G
authors: Liu
authors: State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
authors: Changwei
authors: C
authors: Zhao
mesh_terms: D017738:Alkanesulfonic Acids / Q000737:chemistry*; D000577:Amides / Q000737:chemistry*; D001546:Bentonite / Q000737:chemistry*; D005374:Filtration / Q000295:instrumentation* / Q000379:methods; D005466:Fluorocarbons / Q000737:chemistry*; D008567:Membranes, Artificial; D053761:Nanocomposites / Q000737:chemistry*; D010795:Phthalic Acids / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods
chemical_list: D017738:Alkanesulfonic Acids; D000577:Amides; D005466:Fluorocarbons; D008567:Membranes, Artificial; D010795:Phthalic Acids; D014874:Water Pollutants, Chemical; C500111:poly(m-phenyleneisophthalamide); D001546:Bentonite; C076994:perfluorooctane sulfonic acid
keywords: Nanofiltration membrane; Organically modified montmorillonite; PFOS removal