78307 20241212125558.0 doi 10.1016/j.memsci.2018.01.032 sideral 104552 ART-2018-104552 eng Upadhyaya, Lakshmeesha Block copolymer based novel magnetic mixed matrix membranes-magnetic modulation of water permeation by irreversible structural changes 2018 Access copy available to the general public Unrestricted This contribution focuses on understanding the effect of magnetic field intensity on the performance of novel hydrophilic and hydrophobic mixed matrix membranes (MMMs). The hydrophilic MMMs were made up of polymeric nanoparticles (PNPs) that were synthesized through polymerization-induced self-assembly (PISA) and iron oxide nanoparticles prepared in presence of poly (methacrylic acid)-b-poly quaternized (2-dimethylamino)ethyl methacrylate. The hydrophobic MMMs were prepared by the addition of iron oxide nanoparticles with different surface properties to a linear poly (methacrylic acid)-b-poly (methylmethacrylate) diblock copolymer dissolved in tetrahydrofuran (THF). Three different types of hydrophilic membranes were prepared with polymeric nanoparticles of different morphologies (spherical, vermicular and vesicular). In case of the hydrophobic membranes, six different membranes containing different iron oxide core coated with different stabilizers such as poly (methacrylic acid), quaternized poly(2-dimethylamino)ethyl methacrylate and meso-2, 3-dimercaptosuccinic acid were prepared. An external magnetic field with intensity values up to 1.15 T was used for the permeation studies and the results were compared with those obtained in the absence of magnetic field. The collected data indicate an increase in the water flux of up to 16% and 29% under the magnetic field for hydrophobic and hydrophilic membranes, respectively. The STEM analyses suggest that the magnetic nanoparticles move within the membrane structure during the application of the magnetic field. This displacement/rearrangement causes constant changes in the membrane structure (structure of the active layer) and consequently on the membrane permeability. These results suggest that the application of the magnetic field could be used as a pretreatment step to obtain high flux membranes. info:eu-repo/grantAgreement/ES/UZ/FPA2011-0014 info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 7.015 2018 POLYMER SCIENCE 2 / 85 = 0.024 2018 Q1 T1 ENGINEERING, CHEMICAL 8 / 137 = 0.058 2018 Q1 T1 2.119 2018 Biochemistry 2018 Q1 Physical and Theoretical Chemistry 2018 Q1 Materials Science (miscellaneous) 2018 Q1 Filtration and Separation 2018 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Semsarilar, Mona Quémener, Damien Fernández-Pacheco, Rodrigo Universidad de Zaragoza (orcid)0000-0002-6813-780X Martínez, Gema Universidad de Zaragoza (orcid)0000-0001-7872-6301 Mallada, Reyes Universidad de Zaragoza (orcid)0000-0002-4758-9380 Coelhoso, Isabel M. Portugal, Carla A.M. Crespo, Joao G. 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 2003 395 Universidad de Zaragoza Dpto. Física Materia Condensa. Área Física Materia Condensada 551 (2018), 273-282 J. membr. sci. JOURNAL OF MEMBRANE SCIENCE 0376-7388 2346277 http://zaguan.unizar.es/record/78307/files/texto_completo.pdf Postprint 90746 http://zaguan.unizar.es/record/78307/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:78307 articulos driver 2024-12-12-12:54:33 ARTICLE