Fabrication and characterization of novel polyester thin‐film nanocomposite membranes achieved by functionalized SiO₂ nanoparticles for gas separation

Abstract

In this article, a new type of soluble polyester/silica (PE/SiO2) hybrid was prepared by the ultrasonic irradiation process. Surface modification of SiO2 was conducted using coupling agent γ‐glycidyloxypropyltrimethoxysilane (GOTMS) under ultrasonic irradiation. The structures of the modified hybrid nanocomposites were identified with a Fourier‐transform infrared spectroscopy (FT‐IR), whereas the size of the SiO2 in PE was characterized with a scanning electron microscope (SEM). SEM results indicated the formation and dispersion of nanometer scale size of inorganic domains inside the PE matrix due to the introduction of modified SiO2 and the interactions between organic and inorganic phases. The size of SiO2 particles in the modified system was about 25 nm. The transmission electron microscope (TEM) analysis showing the well‐dispersed nanosized titania nanoparticles (NPs). The densities and solubilities of the PE/SiO2 hybrids were also measured. Furthermore, thermal stability, residual solvent in the membrane film, and structural ruination of membranes were analyzed by thermal gravimetric analysis (TGA). Moreover, their mechanical properties were also characterized. It can be observed that the Young's moduli (E) of the hybrid films increase linearly with the silica content. The results obtained from gas permeation experiments showed that adding SiO2 to the PE membrane structure increased the permeability of the membranes. POLYM. ENG. SCI., 59:E237–E247, 2019. © 2018 Society of Plastics Engineers

Effect of TiO2 modified with dopamine and Silane coupling agent on the electrical properties of PMIA insulation paper

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Synthesis and characteristics of HAB‐6FDA thermally rearranged polyimide nanocomposite membranes

“…[1,2] Overall polymeric films have been restricted partially by a trade-off between selectivity and permeability of gases depending on a polymeric membrane and improving both the permeability and selectivity of parameters. [3][4][5][6] Most data reported on polymeric gas separation membranes have achieved a great area to improving gas permeability or selectivity. Usually, it is hard for glassy polymers to increase permeability without disturbing their excellent inherent selectivity, not the other way around.…”

An atomistic simulation towards molecular design of silica polymorphs nanoparticles in polysulfone based mixed matrix membranes for CO2/CH4 gas separation

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