Improvement of the Performance of PDMS Top Layer of Mixed Matrix Membrane Incorporated with Treated ZIF-8 for Gas Separation

Document Type: Research Paper

Authors

1 Lorestan University, Iran

2 Membrane Research Laboratory, Lorestan University, 68137-17133 Khorramabad, Iran

Abstract

Selectivity and permeability are two significant parameters in the gas separation process. Hence, nowadays, modification of membrane to improve the parameters mentioned above, have highly gained attention. In this study, to increase the performance of the polymeric membrane, bare ZIF-8 nanoparticle (NP), as well as annealed and NH2 -functionalized ones (Medium-sized particles less than 100 nm), were introduced into the structure of polydimethylsiloxane (PDMS) top layer at different concentrations. The high porosity and gas adsorption characteristics of the ZIF-8 made it a proper nanofiller to modify and improve the efficiency of polymeric membranes. The CO2 /N2 and O2 /N2 selectivity of the membranes improved regarding the loading ZIF-8. In addition, NH2 -functionalized and thermal annealed ZIF-8s employed to compare the result of the treated NPs on the efficiency of the fabricated MMMs. Consequently, the selectivity of both mentioned pair gases improved. At 2 wt% of annealed ZIF-8s, the mixed matrix membrane (MMM) presents a desired separation selectivity over 5.5 and 22.37 for O2 /N2 and CO2 /N2 , respectively.

Keywords

Main Subjects



Articles in Press, Corrected Proof
Available Online from 17 June 2020
  • Receive Date: 23 February 2020
  • Revise Date: 16 June 2020
  • Accept Date: 17 June 2020