Preparation of Zn–Metal Organic Framework–Based Poly(vinylidene fluoride-co-hexafluoro-propylene) Ultrafiltration Membrane with Improved Antifouling Properties

IF 3.8 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Water, Air, & Soil Pollution Pub Date : 2023-07-02 DOI:10.1007/s11270-023-06455-w

Mansour Alhoshan, Arun Kumar Shukla, Javed Alam

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Abstract

Zinc-based metal–organic frameworks (Zn-MOFs) are currently extensively investigated as nanofiller1 materials for polymeric membranes owing to their strong potential for integration with polymers, high porosity, high surface area, and adaptable pore functionalities. Therefore, the development of Zn-MOF-based nanocomposite ultrafiltration membranes for water treatment is progressing. In this study, synthesized Zn-MOF nanoparticles were incorporated into a poly(vinylidene fluoride-co-hexafluoro-propylene) (PVDF-co-HFP) polymer casting solution to fabricate Zn-MOF/PVDF-co-HFP nanocomposite ultrafiltration membranes via the phase-inversion method. An advanced technique was used to characterize the surface characteristics, morphology, and chemical composition of nanocomposite membranes. Compared to the pristine PVDF-co-HFP membrane, the Zn-MOF/PVDF-co-HFP nanocomposite membranes exhibited better surface characteristics. The obtained results demonstrate that the presence of Zn-MOF nanoparticles on the membranes considerably enhanced their surface charge (zeta potential of − 62 eV), hydrophilicity (contact angle of 71°), porosity, water content, and thermal stability. Moreover, the resultant Zn-MOF/PVDF-co-HFP nanocomposite membranes exhibited noticeably enhanced water permeability (up to 158 L/m² h bar), which was two times greater than that of the pristine PVDF-co-HFP membrane, whereas the bovine serum albumin (BSA) rejection of the nanocomposite membrane remained high (99%) without compromising the flux. The Zn-MOF/PVDF-co-HFP nanocomposite membrane had the highest flux recovery ratio (FRR) value (99%) and the lowest irreversible flux decline ratio (IFDR) value (0.3%). The developed membrane also exhibited excellent antifouling performance. This study highlights the significant potential of Zn-MOF nanoparticles in the development of nanocomposite ultrafiltration membranes and provides a conceptual model for incorporating other nanoparticles into the design of ultrafiltration membranes for water treatment.

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提高防污性能的聚偏氟乙烯-共六氟丙烯锌金属有机骨架超滤膜的制备

摘要锌基金属有机骨架(Zn-MOFs)由于具有与聚合物结合的强大潜力、高孔隙率、高表面积和适应性强的孔功能，目前被广泛研究作为聚合物膜的纳米填充材料。因此，用于水处理的锌- mof基纳米复合超滤膜的开发正在取得进展。本研究将合成的Zn-MOF纳米颗粒掺入聚偏氟乙烯-共六氟丙烯(PVDF-co-HFP)聚合物浇铸液中，通过相转化法制备Zn-MOF/PVDF-co-HFP纳米复合超滤膜。采用先进的技术表征了纳米复合膜的表面特征、形态和化学成分。与原始PVDF-co-HFP膜相比，Zn-MOF/PVDF-co-HFP纳米复合膜具有更好的表面特性。结果表明，zno - mof纳米颗粒在膜上的存在显著提高了膜的表面电荷(zeta电位为- 62 eV)、亲水性(接触角为71°)、孔隙率、含水量和热稳定性。此外，合成的Zn-MOF/PVDF-co-HFP纳米复合膜的透水性显著增强(高达158 L/m2 h bar)，是原始PVDF-co-HFP膜的两倍，而纳米复合膜的牛血清白蛋白(BSA)排斥率仍然很高(99%)，而不影响通量。zno - mof /PVDF-co-HFP纳米复合膜具有最高的通量回收率(FRR)值(99%)和最低的不可逆通量下降率(IFDR)值(0.3%)。所制备的膜还具有良好的防污性能。该研究强调了锌- mof纳米颗粒在纳米复合超滤膜开发中的重要潜力，并为将其他纳米颗粒纳入水处理超滤膜的设计提供了概念模型。图形抽象

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来源期刊

Water, Air, & Soil Pollution 环境科学-环境科学

CiteScore

4.50

自引率

6.90%

发文量

448

审稿时长

2.6 months

期刊介绍： Water, Air, & Soil Pollution is an international, interdisciplinary journal on all aspects of pollution and solutions to pollution in the biosphere. This includes chemical, physical and biological processes affecting flora, fauna, water, air and soil in relation to environmental pollution. Because of its scope, the subject areas are diverse and include all aspects of pollution sources, transport, deposition, accumulation, acid precipitation, atmospheric pollution, metals, aquatic pollution including marine pollution and ground water, waste water, pesticides, soil pollution, sewage, sediment pollution, forestry pollution, effects of pollutants on humans, vegetation, fish, aquatic species, micro-organisms, and animals, environmental and molecular toxicology applied to pollution research, biosensors, global and climate change, ecological implications of pollution and pollution models. Water, Air, & Soil Pollution also publishes manuscripts on novel methods used in the study of environmental pollutants, environmental toxicology, environmental biology, novel environmental engineering related to pollution, biodiversity as influenced by pollution, novel environmental biotechnology as applied to pollution (e.g. bioremediation), environmental modelling and biorestoration of polluted environments. Articles should not be submitted that are of local interest only and do not advance international knowledge in environmental pollution and solutions to pollution. Articles that simply replicate known knowledge or techniques while researching a local pollution problem will normally be rejected without review. Submitted articles must have up-to-date references, employ the correct experimental replication and statistical analysis, where needed and contain a significant contribution to new knowledge. The publishing and editorial team sincerely appreciate your cooperation. Water, Air, & Soil Pollution publishes research papers; review articles; mini-reviews; and book reviews.