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Surface modification of AMH-3 for development of mixed matrix membrane

Oh , P.C. and Elaine, C.N.T. (2016) Surface modification of AMH-3 for development of mixed matrix membrane. [Citation Index Journal]

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Abstract

AMH-3 layered silicate is an attractive material for gas separation applications due to its 3D structure with crystallographic pore size of 3.4 Å. Nevertheless, AMH-3 is strongly hydrophilic due to the presence of cations between the silicate layers. Therefore, surface modification of AMH-3 is necessary in order to enhance its compatibility with hydrophobic polymer matrix of membranes. In this study, AMH-3 layered silicate was synthesized via hydrothermal synthesis method and functionalized with octyl(methyl)dimethyoxysilane to enhance its hydrophobicity, thereby improve adhesion and dispersion in mixed matrix membrane (MMM). The as-synthesized and functionalized AMH-3 were characterized with analytical tools such as FT-IR, XRD, SAP and contact angle. Functionalized AMH-3 showed higher surface area but reduced pore size. It also exhibited improved hydrophobicity compared to as-synthesized AMH-3. Flat sheet PSf/AMH-3 membranes were subsequently prepared by dry/wet phase inversion technique with varying AMH-3 loadings (1, 3 and 5 wt.%). As apparent from the thermogravimetric analysis, as-synthesized and functionalized AMH-3 showed no significant effect on the thermal stability and decomposition temperatures of the resultant MMMs. The synthesized membranes exhibited similar surface and cross-sectional morphologies with good distribution and dispersion of inorganic filler. Functionalized AMH-3 showed improved hydrophobicity, which results in enhanced compatibility and adhesion with the hydrophobic PSf polymer matrix.

Item Type:Citation Index Journal
Academic Subject One:Academic Department - Chemical Engineering - Material Development
Departments / MOR / COE:Departments > Chemical Engineering
ID Code:12281
Deposited By: Dr. Oh Pei Ching
Deposited On:28 Nov 2017 04:45
Last Modified:28 Nov 2017 04:45

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