沸石咪唑酯骨架（ZIF-8）修饰醋酸纤维素纳滤膜用于潜在的水处理应用。

Zeolitic imidazolate framework (ZIF-8) modified cellulose acetate NF membranes for potential water treatment application.

机构信息

National Research Center on Membrane Technologies, Istanbul Technical University, Maslak 34469, Istanbul, Turkey; Department of Applied Chemistry, Faculty of Chemistry, Kharazmi University, 15719-14911 Tehran, Iran; Environmental Engineering Department, Istanbul Technical University, Maslak, Istanbul 34469, Turkey.

National Research Center on Membrane Technologies, Istanbul Technical University, Maslak 34469, Istanbul, Turkey; Environmental Engineering Department, Istanbul Technical University, Maslak, Istanbul 34469, Turkey.

出版信息

Carbohydr Polym. 2023 Jan 1;299:120230. doi: 10.1016/j.carbpol.2022.120230. Epub 2022 Oct 14.

DOI:10.1016/j.carbpol.2022.120230

PMID:36876828

Abstract

In this study, cellulose acetate (CA)-based nanofiltration membranes, modified with zeolitic imidazole framework-8 (ZIF-8) particles, were prepared with various ZIF-8 contents (0, 0.1, 0.25, 0.5, 1 and 2 wt%), to obtain membranes with improved flux and filtration performance by combining advantages of CA polymer and ZIF-8 metal-organic frameworks. Removal efficiency studies were carried out with bovine serum albumin and two different dyes, along with antifouling performance evaluation. Results of experiments disclosed that as the ZIF-8 ratio increased, the contact angle values decreased. With ZIF-8 addition, the pure water flux of the membranes increased. Besides, the flux recovery ratio value was approximately 85 % for the bare CA membrane, while it increased to above 90 % by blending ZIF-8. Also, in all ZIF-8 doped membranes, a fouling decrease was observed. Importantly, it was observed that the dye removal efficiency increased with the addition of ZIF-8 particles from 95.2 to 97.7 % for Reactive Black 5 dye.

摘要

在这项研究中，制备了基于醋酸纤维素（CA）的纳滤膜，并用沸石咪唑酯骨架-8（ZIF-8）颗粒进行了修饰，ZIF-8 的含量（0、0.1、0.25、0.5、1 和 2 wt%）不同，通过结合 CA 聚合物和 ZIF-8 金属有机骨架的优势，获得了通量和过滤性能得到改善的膜。用牛血清白蛋白和两种不同的染料进行了去除效率研究，并评估了抗污染性能。实验结果表明，随着 ZIF-8 比例的增加，接触角值降低。添加 ZIF-8 后，膜的纯水通量增加。此外，裸 CA 膜的通量恢复率约为 85%，而添加 ZIF-8 后增加到 90%以上。此外，在所有掺杂 ZIF-8 的膜中，观察到污染减少。重要的是，观察到随着 ZIF-8 颗粒的添加，染料去除效率从 95.2%提高到 97.7%，对于活性黑 5 染料而言。