疏水化聚对苯二甲酸乙二酯热致相分离膜孔径对直接接触膜蒸馏处理盐水的影响。

Effect of hydrophobized PET TeMs membrane pore-size on saline water treatment by direct contact membrane distillation.

作者信息

Yeszhanov Arman B, Korolkov Ilya V, Güven Olgun, Melnikova Galina B, Dosmagambetova Saule S, Borissenko Alexander N, Nurkassimov A K, Kassymzhanov Murat T, Zdorovets Maxim V

机构信息

The Institute of Nuclear Physics of the Republic of Kazakhstan 050032 Almaty Kazakhstan

Laboratory of Engineering Profile, L. N. Gumilyov Eurasian National University 010008 Astana Kazakhstan.

出版信息

RSC Adv. 2024 Jan 29;14(6):4034-4042. doi: 10.1039/d3ra07475g. eCollection 2024 Jan 23.

This paper describes the desalination process by membrane distillation (MD) using track-etched membranes (TeMs). Hydrophobic track-etched membranes based on poly(ethylene terephthalate) (PET TeMs) with pore diameters from 700 to 1300 nm were prepared by UV-initiated graft polymerization of lauryl methacrylate (LMA) inside the nanochannels. Modified PET TeMs were investigated by Fourier transform infrared (FTIR) spectroscopy, atomic force microscopy (AFM), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and contact wetting angle (CA) measurements. Hydrophobic PET TeMs were tested for treating saline solutions of different concentrations by the direct contact membrane distillation (DCMD) method. The influence of membrane pore diameter and salt solution concentration on the water flux and rejection degree were investigated. Membranes with CA 94 ± 4° were tested in the direct contact membrane distillation (DCMD) of 7.5-30 g L saline solution. Hydrophobic membranes with large pore sizes showed water fluxes in the range of 1.88 to 11.70 kg m h with salt rejection values of up to 91.4%.

本文描述了使用径迹蚀刻膜（TeMs）通过膜蒸馏（MD）进行脱盐的过程。通过在纳米通道内对甲基丙烯酸月桂酯（LMA）进行紫外引发接枝聚合，制备了基于聚对苯二甲酸乙二酯（PET TeMs）的疏水性径迹蚀刻膜，其孔径为700至1300纳米。通过傅里叶变换红外（FTIR）光谱、原子力显微镜（AFM）、扫描电子显微镜（SEM）、热重分析（TGA）和接触润湿角（CA）测量对改性PET TeMs进行了研究。通过直接接触膜蒸馏（DCMD）方法测试了疏水性PET TeMs对不同浓度盐溶液的处理效果。研究了膜孔径和盐溶液浓度对水通量和截留率的影响。在7.5 - 30 g/L盐溶液的直接接触膜蒸馏（DCMD）中测试了接触角为94±4°的膜。大孔径的疏水性膜显示出1.88至11.70 kg m⁻² h⁻¹的水通量，截留率高达91.4%。