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Issue 100, 2015
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Synergistic interactions between POSS and fumed silica and their effect on the properties of crosslinked PDMS nanocomposite membranes

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Abstract

A facile strategy for the synthesis of binary filler nanocomposite membranes containing fumed silica (FS) and octatrimethylsiloxy polyhedral oligomeric silsesquioxane (POSS) nanoparticles was proposed to prepare high performance PDMS–FS–POSS nanocomposite membranes. To fully explore the synergistic effect between the POSS and FS nanoparticles, thermal stability using thermo-gravimetric analysis (TGA) and dispersion quality using scanning electron microscopy (SEM) were investigated, while the crosslinked network was studied using Fourier transformed infrared spectroscopy (FTIR). The results showed that the thermal stability of these novel nanocomposite membranes was much better than that of the neat membrane. Thermodynamically, dipole–dipole interactions between the functional groups are the main parameter leading to better dispersion and thermal stability. Furthermore, it was found that the separation properties of different gases (H2, C3H8, CO2 and CH4) across the nanocomposite membranes were enhanced with increasing FS content. All the improvements observed can be attributed to the synergistic interactions between FS and POSS.

Graphical abstract: Synergistic interactions between POSS and fumed silica and their effect on the properties of crosslinked PDMS nanocomposite membranes

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Publication details

The article was received on 11 Jul 2015, accepted on 16 Sep 2015 and first published on 16 Sep 2015


Article type: Paper
DOI: 10.1039/C5RA13609A
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Citation: RSC Adv., 2015,5, 82460-82470
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    Synergistic interactions between POSS and fumed silica and their effect on the properties of crosslinked PDMS nanocomposite membranes

    M. Rezakazemi, A. Vatani and T. Mohammadi, RSC Adv., 2015, 5, 82460
    DOI: 10.1039/C5RA13609A

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