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Effect of surfactants’ tail number on the PVDF/GO/TiO2-based nanofiltration membrane for dye rejection and antifouling performance improvement

Mohamat, R. and Suriani, A. B. and Mohamed, A. and Muqoyyanah, Muqoyyanah and Othman, M. H. D. and Rohani, R. and Mamat, M. H. and Ahmad, M. K. and Azlan, M. N. and Mohamed, M. A. and Birowosuto, M. D. and Soga, T. (2021) Effect of surfactants’ tail number on the PVDF/GO/TiO2-based nanofiltration membrane for dye rejection and antifouling performance improvement. International Journal of Environmental Research, 151 . pp. 149-161. ISSN 1735-6865

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Official URL: http://dx.doi.org/10.1007/s41742-020-00299-6

Abstract

In this work, the novel utilisation of customised double- and triple-tail sodium bis(3,5,5-trimethyl-1-hexyl) sulphosuccinate (AOT4) and sodium 1,4-bis(neopentyloxy)-3-(neopentyloxycarbonyl)-1,4-dioxobutane-2-silphonate (TC14) surfactants to assist the direct graphene oxide (GO) synthesis via electrochemical exfoliation utilising dimethylacetamide (DMAc) as a solvent were investigated. The synthesised DMAc-based GO and titanium dioxide (TiO2) nanoparticles were then used to fabricate polyvinylidene fluoride (PVDF)-based nanofiltration (NF) membranes by the non-solvent-induced phase separation method. The incorporation of GO and TiO2 as hydrophilic nanoparticles were to enhance membrane hydrophilicity. The utilisation of higher surfactants’ tail number obviously alters the fabricated membrane’s morphology which further affects its performance for dye rejection and antifouling ability. Higher surfactants’ tail number resulted in higher oxidation process which then provided more interaction between the GO and PVDF. Based on the dead-end cell measurement, PVDF/TC14-GO/TiO2 presented a slightly higher dye rejection efficiency of 92.61% as compared to PVDF/AOT4-GO/TiO2 membrane (92.39%). However, PVDF/TC14-GO/TiO2 possessed three times higher water permeability (48.968 L/m2 h MPa) than PVDF/AOT4-GO/TiO2 (16.533 L/m2 h MPa) and also higher hydrophilicity as presented by lower contact angle (65.4 ± 0.17°). This confirmed that higher surfactants’ tail number improved the fabricated membrane’s performance. Both fabricated membranes also exhibited high flux recovery ratio (FRR) (> 100%) which indicated better antifouling properties.

Item Type:Article
Uncontrolled Keywords:Dye rejection, Electrochemical exfoliation
Subjects:T Technology > TP Chemical technology
Divisions:Chemical and Energy Engineering
ID Code:94686
Deposited By: Widya Wahid
Deposited On:31 Mar 2022 15:52
Last Modified:31 Mar 2022 15:52

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