An Investigation Into the Influence of Titania–Carbon Nanotube Nanophotocatalysts Into the Filtration Performance of Polyethersulfone-Based Membranes

IF 2.7 3区 化学 Q2 POLYMER SCIENCE
Sithembela A. Zikalala, Oranso T. Mahlangu, Jianxin Li, Bhekie B. Mamba, Edward N. Nxumalo
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引用次数: 0

Abstract

The polyethersulfone/sulfonated polyethersulfone (PES/SPSf) blend is enriched with ionizable sulfonic acid groups rendering a stable polymer system suited for blending nanocomposites using water as a dispersant. PES/SPSf/TiO2-amorphous carbon nanotubes (aCNT) mixed matrix membranes are prepared via addition of a TiO2–aCNT/deionized water slurry and precipitated via non-solvent induced phase separation. Membranes' electrostatic and non-electrostatic interactions with charged organic pollutants and membrane–dye interactions are probed using the Liftshitz-acid–base approach. Fluid transport and solute rejection mechanisms are investigated through porosity, pore radius, flux, permeance, dye rejection and fouling propensity. PES/SPSf/TiO2–aCNT membrane contact angle at 1.6 wt.% TiO2–aCNT loading reached 35° accompanied by pore radius decrease and a decline in membrane pure water permeability (197.7 for MF0 to 48.5 L.m−2.h−1 for MF1.6). Membranes had good rejection for cationic azure B (≈90%) and zwitterionic rhodamine B (≈100%) compared to anionic charged methyl orange (MO) (2.0%–10.8%). Major dye removal mechanism was size exclusion, where reactive red 120 (1335.9 g/mol) retention was higher than that of MO (327.4 g/mol). TiO2–aCNT loading imputes membranes additional cationic charge and electron donor components that enables solute transportation via electrostatic switching mechanism and charge-dependent antifouling for reactive dyes, which are the bulk of textile industry pollution.

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来源期刊
Journal of Applied Polymer Science
Journal of Applied Polymer Science 化学-高分子科学
CiteScore
5.70
自引率
10.00%
发文量
1280
审稿时长
2.7 months
期刊介绍: The Journal of Applied Polymer Science is the largest peer-reviewed publication in polymers, #3 by total citations, and features results with real-world impact on membranes, polysaccharides, and much more.
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