NIMTE OpenIR  > 2018专题
Symmetrical polysulfone/poly(acrylic acid) porous membranes with uniform wormlike morphology and pH responsibility: Preparation, characterization and application in water purification
Zhu, Lijing; Song, Haiming; Wang, Gang; Zeng, Zhixiang; Xue, Qunji
2018
Source PublicationJOURNAL OF MEMBRANE SCIENCE
Volume549Pages:515-522
AbstractWell defined porous membranes have been fabricated from polystyrene based block copolymers by self-assembly and non-solvent induced phase separation. However, simplifying the time-consuming preparation steps and overcome the limitation in materials remain challenging. Here, symmetrical polysulfone/poly(acrylic acid) (PSf/PAA) membranes with uniform wormlike morphology were fabricated by a two-stage phase inversion strategy combining a vapor-induced phase separation (VIPS) with a liquid-induced phase separation (LIPS) for the first time. The casting solutions were synthesized via in situ cross-linking polymerization of AA in PSf solution and spread into films without any treatment. After exposing in humid air for a certain time, the films were soaked in a water bath. It was confirmed that the wormlike networks covered the membrane surfaces by tuning the exposure time and AA concentration. The membranes exhibited pH-dependent permselectivity. When the solution pH was varied from 1.3 to 12.5, water flux ranged from similar to 334.1 to similar to 55.4 L m(-2) h(-1) bar(-1), and molecular weight cutoff of the membrane decreased from 2000 to 600 kg/mol. Moreover, the membranes were able to remove copper ions from water with a maximum static adsorption capacity of similar to 235 mg/g at pH 6, and reused as reusable adsorbents. The present work opens a new path for fabricating symmetrical porous membranes with uniform wormlike morphology and pH responsibility in up-scale for application in water purification, especially the removal of heavy metal anions.
KeywordInduced Phase-separation Heavy-metal Ions Cross-linked Polymerization Hollow-fiber Membranes Block-copolymer Aqueous-solutions Polyethersulfone Membranes Radical Polymerization Antifouling Properties Nanoporous Membranes
Subject AreaEngineering ; Materials Science
Language英语
Document Type期刊论文
Identifierhttp://ir.nimte.ac.cn/handle/174433/16789
Collection2018专题
Recommended Citation
GB/T 7714
Zhu, Lijing,Song, Haiming,Wang, Gang,et al. Symmetrical polysulfone/poly(acrylic acid) porous membranes with uniform wormlike morphology and pH responsibility: Preparation, characterization and application in water purification[J]. JOURNAL OF MEMBRANE SCIENCE,2018,549:515-522.
APA Zhu, Lijing,Song, Haiming,Wang, Gang,Zeng, Zhixiang,&Xue, Qunji.(2018).Symmetrical polysulfone/poly(acrylic acid) porous membranes with uniform wormlike morphology and pH responsibility: Preparation, characterization and application in water purification.JOURNAL OF MEMBRANE SCIENCE,549,515-522.
MLA Zhu, Lijing,et al."Symmetrical polysulfone/poly(acrylic acid) porous membranes with uniform wormlike morphology and pH responsibility: Preparation, characterization and application in water purification".JOURNAL OF MEMBRANE SCIENCE 549(2018):515-522.
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