title: Block copolymer hollow fiber membranes with catalytic activity and pH-response.
abstract: We fabricated block copolymer hollow fiber membranes with self-assembled, shell-side, uniform pore structures. The fibers in these membranes combined pores able to respond to pH and acting as chemical gates that opened above pH 4, and catalytic activity, achieved by the incorporation of gold nanoparticles. We used a dry/wet spinning process to produce the asymmetric hollow fibers and determined the conditions under which the hollow fibers were optimized to create the desired pore morphology and the necessary mechanical stability. To induce ordered micelle assembly in the doped solution, we identified an ideal solvent mixture as confirmed by small-angle X-ray scattering. We then reduced p-nitrophenol with a gold-loaded fiber to confirm the catalytic performance of the membranes.
authors.affiliation: Advanced Membranes and Porous Materials Center, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia.
authors.forename: Roland
authors.initials: R
authors.lastname: Hilke
authors.forename: Neelakanda
authors.initials: N
authors.lastname: Pradeep
authors.forename: Poornima
authors.initials: P
authors.lastname: Madhavan
authors.forename: Ulla
authors.initials: U
authors.lastname: Vainio
authors.forename: Ali Reza
authors.initials: AR
authors.lastname: Behzad
authors.forename: Rachid
authors.initials: R
authors.lastname: Sougrat
authors.forename: Suzana P
authors.initials: SP
authors.lastname: Nunes
authors.forename: Klaus-Viktor
authors.initials: KV
authors.lastname: Peinemann
mesh_terms: D000627:Aminophenols / Q000737:chemistry; D001709:Biotechnology / Q000379:methods; D002384:Catalysis; D006046:Gold; D006863:Hydrogen-Ion Concentration; D008422:Materials Testing; D008567:Membranes, Artificial; D053768:Metal Nanoparticles / Q000737:chemistry; D036103:Nanotechnology / Q000379:methods*; D009596:Nitrophenols / Q000737:chemistry; D011108:Polymers / Q000737:chemistry*; D012542:Scattering, Radiation; D053838:Scattering, Small Angle; D012995:Solubility; D012997:Solvents / Q000737:chemistry; D013499:Surface Properties; D013696:Temperature; D014466:Ultraviolet Rays; D014783:Viscosity; D014965:X-Rays
chemical_list: D000627:Aminophenols; D008567:Membranes, Artificial; D009596:Nitrophenols; D011108:Polymers; D012997:Solvents; D006046:Gold; C024836:4-nitrophenol