使用碳纳米管改性的聚偏氟乙烯膜处理工业盐水

Treatment of Industrial Brine Using a Poly (Vinylidene Fluoride) Membrane Modified with Carbon Nanotubes.

作者信息

Tshauambea Tshifhiwa T, Malinga Soraya P, Ndungu Patrick G

机构信息

Department of Chemistry, Tshwane University of Technology, Private Bag X680, Pretoria 0001, South Africa.

Department of Chemistry, University of Pretoria, Private Bag X20, Hartfield 0028, South Africa.

出版信息

Membranes (Basel). 2025 Jul 23;15(8):220. doi: 10.3390/membranes15080220.

This study explores using polyvinylidene fluoride (PVDF) membranes modified with multi-walled carbon nanotubes (MWCNTs) to treat simulated and industrial brine from coal power stations. The MWCNTs were acid-treated and characterized using Fourier Transform Infrared Spectroscopy (FTIR), Raman, and nitrogen sorption at 77 K, Thermogravimetric analysis (TGA), and Transmission electron microscopy (TEM). The desired membranes were obtained by casting from a solution of N-Methyl-2-pyrrolidone, PVDF, various weight percentages of MWCNTs, and a small amount of polyvinylpyrrolidone. The acid treatment of the MWCNTs introduced oxygen moieties on the surface, and increased pore volume and surface area while maintaining crystallinity and structural integrity remain preserved. The maximum rejection rate achieved was 41.82% with 1 wt.% of acid-treated MWCNTs in the PVDF membrane. Acid-treated MWCNTs loaded membranes had an improved rejection rate, which was 5× higher than membranes without MWCNTs.

本研究探索使用经多壁碳纳米管（MWCNTs）改性的聚偏氟乙烯（PVDF）膜来处理来自煤电站的模拟盐水和工业盐水。对MWCNTs进行了酸处理，并通过傅里叶变换红外光谱（FTIR）、拉曼光谱、77K下的氮吸附、热重分析（TGA）和透射电子显微镜（TEM）对其进行了表征。通过从N-甲基-2-吡咯烷酮、PVDF、各种重量百分比的MWCNTs和少量聚乙烯吡咯烷酮的溶液中浇铸得到所需的膜。MWCNTs的酸处理在其表面引入了氧基团，增加了孔体积和表面积，同时保持了结晶度和结构完整性。在PVDF膜中加入1 wt.%的酸处理MWCNTs时，实现的最大截留率为41.82%。负载酸处理MWCNTs的膜具有更高的截留率，比未添加MWCNTs的膜高5倍。