(696f) Advanced Composite Membranes with Layered Fillers for Gas Separation

Advanced Composite Membranes
with Layered Fillers for Gas Separation

Dan Zhao*

Department of Chemical and Biomolecular Engineering,

National University of Singapore, 117585 Singapore

E-mail: chezhao@nus.edu.sg

Gas
separation technologies, especially for CO₂ separation, have
attracted increased attention recently because of their important applications
in clean energy and environmental sustainability. Compared to other CO₂
separation technologies, membrane-based CO₂ separation has been
greatly developed in recent years. In order to combine the merits of both
polymeric and inorganic membranes, mixed matrix membranes (MMMs) were invented
by dispersing porous fillers into continuous polymeric matrices hoping to
increase the permeability and selectivity of the resulting membranes while
preserving the properties of good mechanical strength and processability of the
polymeric matrices. In this talk, I will introduce our work in preparing MMMs containing
lamellar MOF or COF fillers with high-aspect-ratio, which exhibit good gas
separation performance because of the increased tortuosity of gas permeation
paths imposed by lamellar fillers. In addition, I will also discuss the direct
fabrication of ultrathin membranes composed of 2D nanosheets. Because of their
ultra-small thickness and precisely tunable pore size and functionality, these
novel membranes may demonstrate unprecedented gas separation performance.

References

1.      Kang,
Z. X.; Peng, Y. W.; Qian, Y. H.; Yuan, D. Q.; Addicoat, M. A.; Heine, T.; Hu,
Z. G.; Tee, L.; Guo, Z. G.; Zhao, D.* Mixed matrix membranes (MMMs) comprising
exfoliated 2D covalent organic frameworks (COFs) for efficient CO₂
separation. Chem. Mater. 2016, 28, 1277-1285.

2.      Kang,
X. Z.; Peng, Y. W.; Hu, Z. G.; Qian, Y. H.; Chi, C. L.; Yeo, L. Y.; Tee, L.;
Zhan, D.* Mixed matrix membranes comprising two-dimensional metal-organic
framework nanosheets for pre-combustion CO₂ capture: a relationship
study of filler morphology versus membrane performance. J. Mater. Chem. A
2015, 3, 20801-20810.