(376u) Multilayer Composite Membranes with Superior CO2 Separation Properties

Authors: 
Arabi Shamsabadi, A., Drexel University
Riazi, H., Drexel University
Laki, S., Drexel University
Smolin, Y. Y., Drexel University
Li, Y., Drexel University
Chatterjee, S., Drexel University
Snyder, J., Drexel University
Soroush, M., Drexel University
Graphene oxide (GO)-based membranes have shown high potential for gas separation1. Numerous membranes containing different forms of GO have been fabricated thanks to its appealing properties2. Different functional groups of GO allow for its functionalization and preparation of functionalized GO membranes3. Also, ionic liquids have been found to be promising materials for CO2 capture4.

This paper deals with the fabrication and gas-transport-performance evaluation of multilayer composite membranes. These membranes were made from a porous polyacrylonitrile (PAN) substrate, GO-melamine (GO-M), an imidazolium-based ionic liquid (IL), and a polydimethylsiloxane (PDMS) coating layer. The doped GO-melamine (GO-M) nanomaterials were prepared by modifying the surfaces of GO nanosheets with melamine and then mixing the modified nanosheets with the IL. The GO-M-IL suspension was dip-coated on the PAN substrate, which was then coated with a layer of PDMS. Results from a thorough investigation of the influence of the GO concentration on the gas-transport properties and long-term stability of the multilayer membranes are presented. Compared to the membrane containing just the IL, the GO-M-IL-based membranes have better CO2/N2 and CO2/CH4 selectivities and slightly lower CO2 permeances.

References:

  1. Wang, S.; Wu, Y.; Zhang, N.; He, G.; Xin, Q.; Wu, X.; Wu, H.; Cao, X.; Guiver, M. D.; Jiang, Z., A highly permeable graphene oxide membrane with fast and selective transport nanochannels for efficient carbon capture. Energy & Environmental Science 2016, 9 (10), 3107-3112.
  2. Shen, J.; Liu, G.; Huang, K.; Chu, Z.; Jin, W.; Xu, N., Subnanometer two-dimensional graphene oxide channels for ultrafast gas sieving. ACS nano 2016, 10 (3), 3398-3409.
  3. Karunakaran, M.; Villalobos, L. F.; Kumar, M.; Shevate, R.; Akhtar, F. H.; Peinemann, K.-V., Graphene oxide doped ionic liquid ultrathin composite membranes for efficient CO 2 capture. Journal of Materials Chemistry A 2017, 5 (2), 649-656.
  4. Zeng, S.; Zhang, X.; Bai, L.; Zhang, X.; Wang, H.; Wang, J.; Bao, D.; Li, M.; Liu, X.; Zhang, S., Ionic-liquid-based CO2 capture systems: structure, interaction and process. Chemical reviews 2017, 117 (14), 9625-9673.