Gas transport behavior of DMDCS modified MCM-48/polysulfone mixed matrix membrane coated by PDMS

Abstract

Mesoporous MCM-48 silica was synthesized by templating method and the structure of particles was characterized by XRD, TEM and N 2 adsorption techniques. The surface modification of particles in order for introducing into PSF matrix was performed by dimethyldichlorosilane (DMDCS) silylation agent. SEM images of as-synthesized and modified MCM-48/PSF MMMs indicate that in the modified MCM-48 silica particles adhered well to the PSF matrix and that the synthesized MMMs were defect free. The incorporation of MCM-48 particles in to the PSF matrix and also surface coating of these MMMs by polydimethylsiloxane (PDMS) were performed. The quality of surface coating was investigated by SEM images and permeability tests. For all gases tested (N 2 , CO 2 , CH 4 and O 2 ), the permeabilities increased in proportion to the weight percent of MCM-48 present in the film and the calculated CO 2 /CH 4 and O 2 / N 2 selectivities of PDMS coated membranes showed enhancement in ideal and actual selectivities both.

Sustainability in Petrochemical Industry: Mixed Matrix Membranes from Polyethersulfone/Cloisite15a® for the Removal of Carbon Dioxide

“…Moreover, all the coated samples show an increase permeance for CO 2 and selectivity compared to the neat. Several studies have reported similar improvement on the gas transport properties upon coating and heat treatment [21,22]. …”

Evaluation of the Properties, Gas Permeability, and Selectivity of Mixed Matrix Membrane Based on Polysulfone Polymer Matrix Incorporated with KIT-6 Silica

“…The nitrogen adsorption–desorption isotherm of KIT-6 is shown in Figure 4. From the nitrogen adsorption isotherms of KIT-6, type IV with a hysteresis loop can be observed which proved the characteristic of a mesoporous material [15,16,19,22,24]. The specific surface area, pore volume, and pore diameter of KIT-6 were determined to be 585 m²/g, 0.42 cm³/g, and 7.01 nm, respectively, which agreed with the data reported by Kishor & Ghoshal [22].…”

“…Kim and Marrand [18] reported that incorporation of 40 wt % of MCM-41 into PSF increased the CO 2 permeability by 275% compared to pristine PSF. Jomekian et al [19] prepared the MMMs of PSF incorporated with MCM-48 increased the CO 2 permeability by ~193% compared to pristine PSF. These studies show that incorporation of mesoporous silica into polymer membranes could enhance the gas permeability of the membranes.…”

Functionalized KIT-6/Polysulfone Mixed Matrix Membranes for Enhanced CO2/CH4 Gas Separation

“…Figure 4 shows the nitrogen adsorption–desorption isotherms of KIT-6 and NH 2 KIT-6. Type IV with a hysteresis loop from the nitrogen adsorption isotherms for KIT-6 and NH 2 KIT-6 is observed, which represents the characteristic of a mesoporous material [ 4 , 5 , 20 , 26 ]. According to the IUPAC classification, a type H1 hysteresis loop can be observed from the isotherm; this indicates the characteristic of mesoporous materials and characteristic of material with interconnected large cylindrical pore geometry and a high degree of pore size uniformity [ 26 ].…”

“…Membrane technology exhibits operational flexibility, small design, cost efficiency, easy scale-up, high product quality, and a small footprint [ 1 , 2 , 3 ]. However, polymer membranes commonly suffer from a trade-off between permeability and selectivity [ 4 , 5 , 6 , 7 , 8 , 9 , 10 ].…”