Formation of semi-permeable polyamide skin layers on the surface of supported liquid membranes |
| |
| Affiliation: | 1. Department of Orthodontics, 22 Zhongguancun Nandajie, Haidian District, Beijing 100081, PR China;2. Center for Craniofacial Stem Cell Research and Regeneration, 22 Zhongguancun Nandajie, Haidian District, Beijing 100081, PR China;3. Central Laboratory and Center for Temporomandibular Disorders and Orofacial Pain, 22 Zhongguancun Nandajie, Haidian District, Beijing 100081, PR China;4. The 3rd Dental Center, Peking University School and Hospital of Stomatology, 22 Zhongguancun Nandajie, Haidian District, Beijing 100081, PR China;1. Chemical Engineering Department, Universidad de Concepción, P.O Box 160-C, Concepción, Chile;2. Civil Engineering Department, Universidad de Concepción, P.O Box 160-C, Concepción, Chile;1. Departamento de Física, Universidad de Jaén, Campus Universitario de Las Lagunillas, 23071 Jaén, Spain;2. Department of Physical Chemistry, Kuban State University, 149 Stavropolskaya st., 350040 Krasnodar, Russia;1. Department of Chemistry, Michigan State University, East Lansing, MI 48824, United States;2. Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, United States;3. ICREA, pg.L.Companys 23, 08010 Barcelona, Spain;4. Department of Chemical Engineering, Polytechnic University of Catalonia, av. Diagonal 647, 08028 Barcelona, Spain;5. Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN 46556, United States;1. Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN, 46656, USA;2. Institute of Bio-Colloid Chemistry, National Academy of Sciences of Ukraine, Vernadskiy blvd. 42, 03142, Kyiv, Ukraine;3. Polytechnic University of Catalonia, av. Diagonal 647, 08028, Barcelona, Spain;4. ICREA, pg.L.Companys 23, 08010, Barcelona, Spain;5. Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, 46556, USA |
| |
| Abstract: | The instability of supported liquid membranes has been a major impediment to practical applications. To address this shortcoming, we have developed a method to form semi-permeable polyamide skin layers in situ on supported liquid membranes containing an anion-exchange extractant (trioctylamine) and a neutral extractant (tributyl phosphate). These skin layers encapsulate large extractant molecules within the membranes but allow the transport of small species across the membranes. A liquid–liquid interfacial polymerization reaction was employed to form the polyamide skin layers utilizing monomers that are compatible with the extractants. SEM examination of the membranes shows the polyamide skin layer to be about 1 micron thick with pore sizes below resolution. Membranes with polyamide skin layers showed a typical flux of 1 μmol/s m2 of Cr(VI), about half that exhibited by similar membranes without skin layers. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
