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将ZIF-8@GO掺入薄膜膜对盐截留率和牛血清白蛋白污染的影响。

Effect of the Incorporation of ZIF-8@GO into the Thin-Film Membrane on Salt Rejection and BSA Fouling.

作者信息

Masibi Elizabeth Gaobodiwe, Makhetha Thollwana Andretta, Moutloali Richard Motlhaletsi

机构信息

Department of Chemical Sciences, Faculty of Science, University of Johannesburg, P.O. Box 17011, Doornfontein, Johannesburg 2028, South Africa.

DSI/Mintek Nanotechnology Innovation Centre-UJ Water Research Node, University of Johannesburg, P.O. Box 17011, Doornfontein, Johannesburg 2028, South Africa.

出版信息

Membranes (Basel). 2022 Apr 17;12(4):436. doi: 10.3390/membranes12040436.

DOI:10.3390/membranes12040436
PMID:35448406
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9027943/
Abstract

A series of Zeolitic imidazole framework-8 (ZIF-8) clusters supported on graphene oxide (ZIF-8@GO) nanocomposites were prepared by varying the ratios of ZIF-8 to GO. The resultant nanocomposites were characterized using various techniques, such as Scanning Electron Microscope (SEM), Transmission Electron Microscope (TEM), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), thermogravimetric analysis (TGA), Fourier Transform Infrared (FTIR) and Raman spectroscopy. These nanocomposites were incorporated into the thin film layer during interfacial polymerisation process of m-phenylenediamine (aqueous phase which contained the dispersed nanocomposites) and trimesoyl chloride (TMC, organic phase) at room temperature onto polyethersulfone (PES) ultrafiltration (UF) support membrane. The membrane surface morphology, cross section and surface roughness were characterized using SEM and AFM, respectively. Compared to the baseline membranes, the thin film nanofiltration (TFN) membranes exhibited improved pure water flux (from 1.66 up to 7.9 L.mh), salt rejection (from 40 to 98%) and fouling resistance (33 to 88%). Optimum ZIF-8 to GO ratio was established as indicated in observed pure water flux, salt rejection and BSA fouling resistance. Therefore, a balance in hydrophilic and porous effect of the filler was observed to lead to this observed membrane behaviour suggesting that careful filler design can result in performance gain for thin film composite (TFC) membranes for water treatment application.

摘要

通过改变ZIF-8与氧化石墨烯（GO）的比例，制备了一系列负载在氧化石墨烯上的沸石咪唑框架-8（ZIF-8@GO）纳米复合材料。使用各种技术对所得纳米复合材料进行了表征，如扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X射线衍射（XRD）、布鲁诺尔-埃米特-泰勒（BET）、热重分析（TGA）、傅里叶变换红外（FTIR）和拉曼光谱。在室温下，将这些纳米复合材料在间苯二胺（含有分散纳米复合材料的水相）和均苯三甲酰氯（TMC，有机相）的界面聚合过程中掺入到聚醚砜（PES）超滤（UF）支撑膜的薄膜层中。分别使用SEM和AFM对膜的表面形态、横截面和表面粗糙度进行了表征。与基线膜相比，薄膜纳滤（TFN）膜的纯水通量（从1.66提高到7.9 L·m⁻¹·h⁻¹）、脱盐率（从40%提高到98%）和抗污染性能（从33%提高到88%）均有所改善。根据观察到的纯水通量、脱盐率和牛血清白蛋白抗污染性能，确定了ZIF-8与GO的最佳比例。因此，观察到填料的亲水性和多孔性效应之间的平衡导致了这种膜性能，这表明精心设计填料可以提高用于水处理应用的薄膜复合（TFC）膜的性能。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08df/9027943/08badfe50c31/membranes-12-00436-g017.jpg
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