State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China; College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China.
College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China.
J Hazard Mater. 2021 Jul 5;413:125379. doi: 10.1016/j.jhazmat.2021.125379. Epub 2021 Feb 10.
Multifunctional filtration membranes (MFMs), which can both effectively separate oil and selectively remove dyes from polluted aquatic system with robust anti-viscous-oil-fouling capacity, strong chemical/physical resistance, and long cycled stability, are highly required but still a challenge to be realized. Herein, a simple route has been demonstrated to address this challenge aforementioned by decorating both halloysite nanotubes (HNTs) and zwitterionic poly (sulfobetaine methyl methacrylate) (PSBMA) on the microporous polyvinylidene fluoride (PVDF) membrane surface via modified polydopamine (PDA) coating route. The as-prepared membrane exhibits super-hydrophilic/underwater super-oleophobic performance and high water permeation flux (32529 ± 278 L m h at 0.85 bar) to purify the diverse viscous oil-in-water emulsions from oily wastewater accompanying with good cycled stability (the recovery rate of permeate flux is close to 100% after 5 cycles). Moreover, the as-prepared MFM possesses not only strong chemical resistance under wide range of pH value (from 1 to 12) and high saline (NaCl: 10 wt%) environment, but also physical resistance against ultrasound bath for 30 min. Given the presence of HNTs, PDA, and PSBMA, our MFM shows enough active sites to adsorb the soluble dyes and metallic ions in wastewater. These excellent properties endow our MFM with great potential for the remediation of complex wastewater.
多功能过滤膜（MFMs）具有有效分离油和选择性去除染料的能力，同时具有强大的抗粘性油污染能力、强化学/物理稳定性和长循环稳定性，因此备受需求，但仍具有挑战性。本文通过改性聚多巴胺（PDA）涂层路线，在微孔聚偏二氟乙烯（PVDF）膜表面上同时修饰海泡石纳米管（HNTs）和两性离子聚（磺基甜菜碱甲基丙烯酸甲酯）（PSBMA），展示了一种简单的方法来解决上述挑战。所制备的膜表现出超亲水/水下超疏油性能和高水渗透通量（在 0.85 巴时为 32529 ± 278 L m h），可净化来自含油废水的各种粘性油包水乳液，且循环稳定性良好（5 次循环后，渗透通量的恢复率接近 100%）。此外，所制备的 MFM 在广泛的 pH 值（从 1 到 12）和高盐（NaCl：10 wt%）环境下具有很强的耐化学性，并且可以抵抗超声浴 30 分钟，具有很强的耐物理性。由于存在 HNTs、PDA 和 PSBMA，我们的 MFM 具有足够的活性位点来吸附废水中的可溶性染料和金属离子。这些优异的性能使我们的 MFM 在复杂废水的修复方面具有巨大的潜力。
