Surface modification in inorganic filler of mixed matrix membrane for enhancing the gas separation performance

Abstract

<jats:title>Abstract</jats:title><jats:p>The development of mixed matrix membrane (MMM) in gas separation process has drawn great attention due to its promising properties. MMM consists of a polymer as the matrix phase, whereas the inorganic filler serves as the dispersed phase. However, poor contact between these two phases often results in unselective gas flow and becomes one of the major issues in the MMM development. Currently, various modification techniques of the inorganic filler to improve the compatibility between the polymers and the particles have been reported. Because of this modification, the CO</jats:p>

Formation of a defect‐free polyimide/zeolitic imidazolate framework‐8 composite membrane for gas separation: in‐depth analysis of organic–inorganic compatibility

“…. In general, hydroxyl groups are present on the alumina surface: these groups react with the ethoxy group of APTES under high temperature to form a covalent bond between the APTES and alumina . Meanwhile, the amine group in the APTES molecule allows it to react with the dianhydride group of polyimide .…”

“…In general, hydroxyl groups are present on the alumina surface: 38,39 these groups react with the ethoxy group of APTES under high temperature to form a covalent bond between the APTES and alumina. 40 Meanwhile, the amine group in the APTES molecule allows it to react with the dianhydride group of polyimide. 41 The formation of covalent bond between the APTES, alumina and polyimide enhanced their affinity to each other and hence stabilized the membrane system.…”

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“…TiO 2 nanoparticles were functionalized by EDA by following the methodology by Venna and Carreon and Ahmed et al . with minor modifications.…”

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