Filtration-Based Synthesis of Micelle-Derived Composite Membranes for High-Flux Ultrafiltration

Autor(en): Yao, Xueping
Guo, Leiming
Chen, Xiaoqiang
Huang, Jun
Steinhart, Martin 
Wang, Yong
Stichwörter: AMPHIPHILIC BLOCK-COPOLYMERS; block copolymers; COPPER HYDROXIDE NANOSTRANDS; FIBRILLAR ADHESIVE PADS; FILMS; HUMIDITY; Materials Science; Materials Science, Multidisciplinary; membranes; micelles; MORPHOLOGY; Nanoscience & Nanotechnology; NANOSPHERES; porous materials; Science & Technology - Other Topics; SEPARATION; SPECTROSCOPY; WATER
Erscheinungsdatum: 2015
Volumen: 7
Ausgabe: 12
Startseite: 6974
Seitenende: 6981
Ideal membrane configurations for efficient separation at high flux rates consist of thin size-selective layers connected to macroporous supports for mechanical stabilization. We show that micelle-derived (MD) composite membranes combine efficient separation of similarly sized proteins and water flux 5-10 times higher than that of commercial membranes with similar retentions. MD composite membranes were obtained by filtration of solutions of amphiphilic block copolymer (BCP) micelles through commercially available macroporous supports covered by sacrificial nanostrand fabrics followed by annealing and removal of the nanostrand fabrics. Swelling-induced pore generation in the BCP films thus covering the macroporous supports yielded similar to 210 nm thin nanoporous size-selective BCP layers with porosities in the 40% range tightly connected to the macroporous supports. Permselectivity and flux rates of the size-selective BCP layers were adjusted by the BCP mass deposited per membrane area and by proper selection of swelling times. The preparation methodology described here may pave the way for a modular assembly system allowing the design of tailored separation membranes.
ISSN: 19448244
DOI: 10.1021/acsami.5b01004

Show full item record

Google ScholarTM