Lee, Jae Hun Im, Kyungmin Han, Sangjin Yoo, Sung Jong Kim, Jinsoo Kim, Jong Hak 2024-01-19T16:03:51Z 2024-01-19T16:03:51Z 2022-01-10 2020-11-01 1383-5866 https://pubs.kist.re.kr/handle/201004/117858 We reported the use of high-performance, CO2-accelerated mixed matrix membranes (MMMs) consisting of sub-micron porous magnesium oxide (MgO) fillers and an amphiphilic polymer matrix. Bimodal-porous, hollow MgO (bh-MgO) spheres were synthesized through a one-step spray pyrolysis and precipitation method. The synthesized bh-MgO spheres were introduced into poly(vinyl chloride)-graft-poly(oxyethylene methacrylate) (PVC-g-POEM), forming MMMs for CO2/N-2 separation. The amphiphilic property of PVC-g-POEM ensured an intimate contact between the bh-MgO filler and polymer matrix with the encapsulation of bh-MgO spheres. The bimodal porous and hollow structure of bh-MgO decreased the gas diffusion resistance in the membranes. Moreover, specific interactions between the surfaces of the bh-MgO and CO2 molecules enhanced the CO2 solubility and accelerate the CO2 molecules more than the N-2 molecules. The dual-functional bh-MgO sphere enhanced the CO2 permeability through physical and chemical mechanisms, simultaneously. The best gas separation performance was obtained in the MMM with 10 wt% bh-MgO fillers, which demonstrated a CO2 permeability of 179.2 Barrer and 42.6 of CO2/N-2 selectivity. English ELSEVIER GAS SEPARATION PERFORMANCE SILICA NANOPARTICLES SURFACE MODIFICATION CO2/N-2 SEPARATION CARBON NANOTUBES OXIDE ABSORPTION ZEOLITE ADSORPTION INTERFACE Bimodal-porous hollow MgO sphere embedded mixed matrix membranes for CO2 capture Article 10.1016/j.seppur.2020.117065 1 SEPARATION AND PURIFICATION TECHNOLOGY, v.250 SEPARATION AND PURIFICATION TECHNOLOGY 250 scie scopus 000552061600010 2-s2.0-85085163780 Engineering, Chemical Engineering Article GAS SEPARATION PERFORMANCE SILICA NANOPARTICLES SURFACE MODIFICATION CO2/N-2 SEPARATION CARBON NANOTUBES OXIDE ABSORPTION ZEOLITE ADSORPTION INTERFACE Gas separation Mixed matrix membrane Magnesium oxide Inorganic filler CO2