Preparation and characterization of carbon black coated membranes for the treatment of saline water by membrane distillation

IF 2.3 4区材料科学 Q2 Chemistry

Journal of Coatings Technology and Research Pub Date : 2023-04-14 DOI:10.1007/s11998-023-00759-6

Mohamed E. A. Ali, Shimaa Elbakry, Moustafa Aboelfadl, Hosam Shawky, Qilin Li, Francois Perreault

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Abstract

Membrane distillation (MD) is a promising approach to address water scarcity due to its capacity to achieve high water recovery in desalination. However, high energy consumption and decline in permeate flux are key issues of MD desalination. Nanophotonic materials like carbon black (CB) have been used to improve MD performance and reduce energy consumption in the presence of sunlight. In this article, we investigated different coating procedures for the formation of a uniform layer of CB particles on polytetrafluoroethylene (PTFE) and polyvinylidene fluoride membranes. The coated membranes were manufactured and characterized using Fourier-transform infrared spectroscopy and scanning electron microscopy. Contact angle measurements demonstrated an increase in hydrophilicity after CB was added. Both types of membranes exhibited an increase in permeate flux and salt rejection with the addition of CB, with the PTFE membrane coated with 0.5% of CB having the highest water flux, reaching 14.6 L/m² h (LMH) compared to a commercial control having a flux of 8.0 LMH. The effects of different parameters on the performance of the hydrophilic CB-coated PTFE membrane were examined. The results demonstrated that the CB coating developed can be advantageous to improve the performance of MD membranes.

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膜蒸馏处理盐水用炭黑包覆膜的制备与表征

膜蒸馏(MD)是一种很有前途的解决水资源短缺的方法，因为它能够在海水淡化中实现高水回收率。然而，高能耗和渗透通量下降是MD脱盐的关键问题。像炭黑(CB)这样的纳米光子材料已经被用来提高光电二极管的性能，并在阳光下降低能耗。在本文中，我们研究了在聚四氟乙烯(PTFE)和聚偏氟乙烯膜上形成均匀的CB颗粒层的不同涂覆工艺。制备了涂层膜，并用傅里叶变换红外光谱和扫描电镜对其进行了表征。接触角测量表明，加入丁基苯后，亲水性有所提高。两种类型的膜都表现出随着CB的添加而增加的渗透通量和盐的截留，其中涂有0.5% CB的PTFE膜的水通量最高，达到14.6 L/m2 h (LMH)，而商业控制的通量为8.0 LMH。考察了不同工艺参数对亲水cb包覆PTFE膜性能的影响。结果表明，所开发的CB涂层有利于提高MD膜的性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Coatings Technology and Research CHEMISTRY, APPLIED-MATERIALS SCIENCE, COATINGS & FILMS

CiteScore

4.40

自引率

8.70%

发文量

期刊介绍： Journal of Coatings Technology and Research (JCTR) is a forum for the exchange of research, experience, knowledge and ideas among those with a professional interest in the science, technology and manufacture of functional, protective and decorative coatings including paints, inks and related coatings and their raw materials, and similar topics.