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Enhanced Performance of Mixed‐Matrix Membranes through a Graft Copolymer‐Directed Interface and Interaction Tuning Approach
Author(s) -
Chi Won Seok,
Kim Sang Jin,
Lee SeungJoon,
Bae YounSang,
Kim Jong Hak
Publication year - 2015
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201402677
Subject(s) - copolymer , membrane , barrer , amphiphile , permeation , methacrylate , materials science , vinyl chloride , imidazole , chemical engineering , polymer chemistry , selectivity , matrix (chemical analysis) , chemistry , organic chemistry , polymer , catalysis , composite material , biochemistry , engineering
Herein, a high performance mixed‐matrix membrane (MMM) is reported with simultaneously large improvements in the CO 2 permeability by 880 % from 70.2 to 687.7 Barrer (1 Barrer=1×10 −10 cm 3 cm cm −2 s −1 cmHg −1 ) and CO 2 /N 2 selectivity by 14.4 % from 30.5 to 34.9. These findings represent one of the most dramatic improvements ever reported for MMMs. These improvements are obtained through an interface and interaction tuning approach based on an amphiphilic grafted copolymer. Poly(vinyl chloride)‐ g ‐poly(oxyethylene methacrylate) (PVC‐ g ‐POEM) graft copolymer plays a key role as a soft organic matrix to provide good permeation properties, uniform distribution of zeolite imidazole frameworks‐8 (ZIF‐8), and better interfacial contact with inorganic compounds. In particular, the CO 2 /C 3 H 8 and CO 2 /C 3 H 6 selectivities reached 10.5 and 42.7, respectively, for PVC‐ g ‐POEM/ZIF (40 %) MMMs; this indicates that it could be a promising membrane material for the purification of C 3 hydrocarbons.