Tunning the Wettability of the PVDF Membrane using the PVA-Stabilized TA-UiO-66-NH2 MOF Membranes to Separate Layered Oil-Water Mixture and Surfactant-Stabilized Emulsion

IF 3.3 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Chemistry - An Asian Journal Pub Date : 2024-12-23 DOI:10.1002/asia.202401430

Muhammad Fiaz, Sumayyah Khan, Nadeem Baig, Manzar Sohail

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Abstract

This study introduces a UiO-66-NH₂/Tannic acid/Polyvinylidene fluoride (UTP) composite membrane for efficient oil-water separation. Pristine polyvinylidene fluoride (PVDF) membranes, due to their hydrophobic nature, tend to foul during oil-in-water emulsion separation. By incorporating the metal-organic framework (MOF) UiO-66-NH₂ and stabilizing it with tannic acid (TA) and polyvinyl alcohol (PVA), the membrane's hydrophilicity and antifouling properties were significantly enhanced. The water contact angle of the UTP membrane decreased from 121° to 3°, indicating a dramatic increase in hydrophilicity, while the underwater oil contact angle (UWOCA) of 119° demonstrated excellent oleophobicity. The modified membrane achieved over 99 % separation efficiency and improved flux by 15 times compared to the pristine PVDF. TA acted as a binder, ensuring uniform MOF dispersion and improving the composite's stability. The PVA further reinforced the structure, enhancing durability under operational conditions. Durability tests showed no significant MOF detachment after repeated use, confirming the stability of the UTP composite. The results highlight the potential of the UTP membrane for oil-water separation with superior permeability and fouling resistance.

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使用pva稳定的TA-UiO-66-NH2 MOF膜调节PVDF膜的润湿性，以分离层状油水混合物和表面活性剂稳定的乳液。

研究了UiO-66-NH2/单宁酸/聚偏氟乙烯（UTP）复合膜的高效油水分离。原始聚偏氟乙烯（PVDF）膜由于其疏水性，在水包油乳液分离过程中容易发生污染。通过加入金属有机骨架（MOF） UiO-66-NH2，并与单宁酸（TA）和聚乙烯醇（PVA）稳定后，膜的亲水性和防污性能得到了显著提高。UTP膜的水接触角从121°减小到3°，亲水性显著提高，而水下油接触角（UWOCA）为119°，疏油性能优异。与原始PVDF相比，改性膜的分离效率超过99%，通量提高了15倍。TA作为粘结剂，保证了MOF的均匀分散，提高了复合材料的稳定性。聚乙烯醇进一步加强了结构，提高了在操作条件下的耐久性。耐久性测试显示，重复使用后MOF没有明显脱离，证实了UTP复合材料的稳定性。结果表明，UTP膜具有优异的渗透性和抗污性，具有油水分离的潜力。

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来源期刊

Chemistry - An Asian Journal 化学-化学综合

CiteScore

7.00

自引率

2.40%

发文量

535

审稿时长

1.3 months

期刊介绍： Chemistry—An Asian Journal is an international high-impact journal for chemistry in its broadest sense. The journal covers all aspects of chemistry from biochemistry through organic and inorganic chemistry to physical chemistry, including interdisciplinary topics. Chemistry—An Asian Journal publishes Full Papers, Communications, and Focus Reviews. A professional editorial team headed by Dr. Theresa Kueckmann and an Editorial Board (headed by Professor Susumu Kitagawa) ensure the highest quality of the peer-review process, the contents and the production of the journal. Chemistry—An Asian Journal is published on behalf of the Asian Chemical Editorial Society (ACES), an association of numerous Asian chemical societies, and supported by the Gesellschaft Deutscher Chemiker (GDCh, German Chemical Society), ChemPubSoc Europe, and the Federation of Asian Chemical Societies (FACS).