Enhancement in performance of the PVC/nanoclay mixed matrix nanofiltration membrane

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-07-08 DOI:10.1007/s43153-024-00485-5

A. Ferdowsi, T. Kikhavani, S. N. Ashrafizadeh

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Abstract

Structural and functional properties of a membrane describe its quality necessary to achieve the defined performance. Preparation of mixed matrix membrane (MMM) was performed considering the non-solvent induced phase separation (NIPS) method, relied immersion precipitation technique using dimethylformamide (DMF) and tetrahydrofuran (THF) solvents. Nanoclay particles (NCPs) at a certain weight were dispersed within the PVC polymer. Four different membranes were structurally characterized using FTIR, XRD, and EDS methods. Further analyses were on surface morphology using FESEM, and AFM. Nanofiltration experiment was conducted and functionality of the novel membranes was evaluated in terms of flux of water permeation (FWP), hydrophilicity character (contact angle determination), and salt rejection (SR) behavior. With use of 2 wt% NCPs, porosity and hydrophilicity characteristics of the resultant membrane increased by 15%, and 17%, respectively. Crystallinity nature of the composite membrane did not change considerably (XRD results). Pure water flux (PWF) and calculated salt rejection were 118.35 kg m⁻² h⁻¹, and 95%, respectively.

Graphical abstract

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提高聚氯乙烯/纳米粘土混合基质纳滤膜的性能

膜的结构和功能特性说明了其达到规定性能所需的质量。混合基质膜（MMM）的制备采用了非溶剂诱导相分离（NIPS）方法，即使用二甲基甲酰胺（DMF）和四氢呋喃（THF）溶剂的浸泡沉淀技术。一定重量的纳米粘土颗粒（NCP）被分散在聚氯乙烯聚合物中。使用傅立叶变换红外光谱、X 射线衍射和 EDS 方法对四种不同的膜进行了结构表征。使用 FESEM 和 AFM 对表面形态进行了进一步分析。进行了纳滤实验，并根据水渗透通量（FWP）、亲水性（接触角测定）和盐排斥（SR）行为对新型膜的功能进行了评估。使用 2 wt% 的 NCP 后，所得膜的孔隙率和亲水性分别提高了 15%和 17%。复合膜的结晶性质没有明显变化（XRD 结果）。纯水通量（PWF）和计算得出的盐排斥率分别为 118.35 kg m-2 h-1 和 95%。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.