渗透蒸发海水淡化用PVA-SiO2纳米复合膜的制备与表征

IF 1 4区工程技术 Q4 CHEMISTRY, APPLIED

Chemical Industry & Chemical Engineering Quarterly Pub Date : 2021-01-01 DOI:10.2298/ciceq200505037t

B. Tirnakci, Y. Salt

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引用次数: 5

摘要

渗透蒸发是一种膜工艺，具有很高的分离性能，在处理含盐水源方面具有重要的潜力。本研究采用溶液浇铸法制备了聚乙烯醇(PVA)和PVA- sio2纳米复合膜，并对合成海水(35 g L-1)在30、40和50℃条件下进行了渗透脱盐研究。研究了温度和SiO2掺入量对聚合物纳米复合膜渗透汽化性能的影响。采用扫描电镜(SEM)、傅里叶变换红外光谱(FT-IR)和热重分析(TGA)对膜进行了表征。在50?C的渗透通量为4.93 kg m-2 h-1，盐去除率为99.3%。在温度为30℃时，最高的脱盐率为99.8%。结果表明，在聚合物基体中掺入纳米sio2后，PVA膜的渗透汽化性能得到了显著提高。

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Preparation and characterization of PVA-SiO2 nanocomposite membranes for seawater desalination by pervaporation

Pervaporation is a membrane process that offers high separation performance and has an important potential for the treatment of saline water sources. In this study, poly(vinyl alcohol) (PVA) and PVA-SiO2 nanocomposite membranes were prepared by the solution-casting method, and pervaporative water desalination studies were carried out for synthetic seawater (35 g L-1) at 30, 40 and 50?C. Effects of the temperatures and the incorporation of SiO2 on the pervaporation performance of polymeric nanocomposite membranes were investigated. Membranes were characterized by scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FT-IR) and thermogravimetric analysis (TGA). In experiments conducted at 50?C, a permeate flux of 4.93 kg m-2 h-1 with a salt rejection of 99.3% were obtained. The highest salt rejection was 99.8% at temperature of 30?C. The results showed that the pervaporation performance of PVA membranes was remarkably enhanced with the incorporation of nano-SiO2 into polymeric matrix.

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来源期刊

Chemical Industry & Chemical Engineering Quarterly CHEMISTRY, APPLIED-ENGINEERING, CHEMICAL

CiteScore

2.10

自引率

0.00%

发文量

审稿时长

3.3 months

期刊介绍： The Journal invites contributions to the following two main areas: • Applied Chemistry dealing with the application of basic chemical sciences to industry • Chemical Engineering dealing with the chemical and biochemical conversion of raw materials into different products as well as the design and operation of plants and equipment. The Journal welcomes contributions focused on: Chemical and Biochemical Engineering [...] Process Systems Engineering[...] Environmental Chemical and Process Engineering[...] Materials Synthesis and Processing[...] Food and Bioproducts Processing[...] Process Technology[...]