用于水处理的聚碳酸酯/聚乙烯醇-二氧化钛薄膜纳米复合膜的制作和性能评估

IF 1.8 4区 工程技术 Q3 Chemical Engineering
Arian Samiei, Homayun Khezraqa, Habib Etemadi, Elham Shokri
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引用次数: 0

摘要

近年来,人们对使用聚合物纳米复合膜作为去除水中污染物和处理各种用途废水的更先进方法越来越感兴趣。本研究将聚碳酸酯/聚乙烯醇-二氧化钛薄膜(PC/PVA-TiO2)通过在 PVA/TiO2 溶液中浸涂 PC 基质的方法制成了纳米复合薄膜(TFN)。利用各种方法,包括衰减全反射-傅立叶变换红外光谱(ATR-FTIR)、场发射扫描电子显微镜(FE-SEM)、原子力显微镜(AFM)和水接触角来评估所制薄膜的结构特征。然后在浸没膜系统中检测了 PC/PVA 薄膜复合(TFC)和 PC/PVA-TiO2 TFN 膜,以评估它们在不同真空跨膜压力(0.3 和 0.6 巴)条件下过滤腐植酸(HA)的效果。傅立叶变换红外-原子吸收光谱(FTIR-ATR)结果证实了 PVA/TiO2 纳米粒子(NPs)活性层的形成。结果表明,在 PVA/TiO2 活性层中添加 1 wt.% 的 TiO2 NPs 能显著提高水接触角,从 PC 支持层的 77.5°提高到 PC/PVA-TiO2 (0.1) TFN 膜的 55.3°。此外,FE-SEM 结果证实形成了厚度为 237.87 nm 的 PVA/TiO2 活性层。纯水通量从 PC/PVA TFC 膜的 101.64 升/平方米小时分别增加到 PC/PVA-TiO2 (0.05) 和 PC/PVA-TiO2 (0.1) TFN 膜的 144.02 升/平方米小时和 199.09 升/平方米小时。结果还显示,与使用较高跨膜压力时相比,在较低跨膜压力时,所有膜的 HA 去除率都较高。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Fabrication and performance evaluation of polycarbonate/polyvinyl alcohol–titanium dioxide thin‐film nanocomposite membranes for water treatment
In recent years, there has been growing interest in using polymer nanocomposite membranes as a more advanced method for removing pollutants from water and treating wastewater for various purposes. In this study, thin‐film nanocomposite (TFN) membranes of polycarbonate/polyvinyl alcohol–titanium dioxide thin‐film (PC/PVA–TiO2) were fabricated by dip‐coating a PC substrate in a PVA/TiO2 solution. Various methods, including attenuated total reflectance‐Fourier transform infrared (ATR‐FTIR) spectroscopy, field emission scanning electron microscopy (FE‐SEM), atomic force microscopy (AFM), and water contact angle were utilized to assess the structural characteristics of the produced membranes. The PC/PVA thin‐film composite (TFC) and PC/PVA–TiO2 TFN membranes were then examined in a submerged membrane system to evaluate their effectiveness in filtering humic acid (HA) under various vacuum transmembrane pressure (0.3 and 0.6 bar) condition. The FTIR‐ATR results confirmed the formation of the active layer of PVA/TiO2 nanoparticles (NPs). It was observed that adding 1 wt.% of TiO2 NPs to the active layer of PVA/TiO2 significantly enhanced the water contact angle from 77.5° for PC support to 55.3° for PC/PVA–TiO2 (0.1) TFN membranes. Furthermore, the FE‐SEM results confirmed the formation of an active layer of PVA/TiO2 with a thickness of 237.87 nm. The pure water flux increased from 101.64 L/m2h for the PC/PVA TFC membrane to 144.02 L/m2h and 199.09 L/m2h for the PC/PVA–TiO2 (0.05) and PC/PVA–TiO2 (0.1) TFN membranes, respectively. Also, the results revealed that at lower transmembrane pressure, all membranes showed higher value in HA removal as compared to when higher transmembrane pressure was used.
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来源期刊
Asia-Pacific Journal of Chemical Engineering
Asia-Pacific Journal of Chemical Engineering 工程技术-工程:化工
CiteScore
3.50
自引率
11.10%
发文量
111
审稿时长
2.8 months
期刊介绍: Asia-Pacific Journal of Chemical Engineering is aimed at capturing current developments and initiatives in chemical engineering related and specialised areas. Publishing six issues each year, the journal showcases innovative technological developments, providing an opportunity for technology transfer and collaboration. Asia-Pacific Journal of Chemical Engineering will focus particular attention on the key areas of: Process Application (separation, polymer, catalysis, nanotechnology, electrochemistry, nuclear technology); Energy and Environmental Technology (materials for energy storage and conversion, coal gasification, gas liquefaction, air pollution control, water treatment, waste utilization and management, nuclear waste remediation); and Biochemical Engineering (including targeted drug delivery applications).
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