Khan Muhammad Imran, Shanableh Abdallah, Elboughdiri Noureddine, Kriaa Karim, Ghernaout Djamel, Ghareba Saad, Khraisheh Majeda, Lashari Mushtaq Hussain
Research Institute of Sciences and Engineering, University of Sharjah, Sharjah 27272, United Arab Emirates.
Chemical Engineering Department, College of Engineering, University of Ha'il, P.O. Box 2440, Ha'il 81441, Saudi Arabia.
Membranes (Basel). 2021 Feb 14;11(2):133. doi: 10.3390/membranes11020133.
In this work, the synthesis of a series of the functionalized inorganic/organic composite anion exchange membranes (AEMs) was carried out by employing the varying amount of inorganic filler consist of -(trimethoxysilylpropyl)-,,-trimethylammonium chloride (TMSP-TMACl) into the quaternized poly (2, 6-dimethyl-1, 4-phenylene oxide) (QPPO) matrix for acid recovery via diffusion dialysis (DD) process. Fourier transform infrared (FTIR) spectroscopy clearly demonstrated the fabrication of the functionalized inorganic/organic composite AEMs and the subsequent membrane characteristic measurements such as ion exchange capacity (IEC), linear swelling ratio (LSR), and water uptake (W) gave us the optimum loading condition of the filler without undesirable filler particle aggregation. These composite AEMs exhibited IEC of 2.18 to 2.29 meq/g, LSR of 13.33 to 18.52%, and W of 46.11 to 81.66% with sufficient thermal, chemical, and mechanical stability. The diffusion dialysis (DD) test for acid recovery from artificial acid wastewater of HCl/FeCl showed high acid DD coefficient (U) (0.022 to 0.025 m/h) and high separation factor (S) (139-260) compared with the commercial membrane. Furthermore, the developed AEMs was acceptably stable (weight loss < 20%) in the acid wastewater at 60 °C as an accelerated severe condition for 2 weeks. These results clearly indicated that the developed AEMs have sufficient potential for acid recovery application by DD process.
在本工作中，通过将不同量的由-(三甲氧基甲硅烷基丙基)-、、、三甲基氯化铵（TMSP-TMACl）组成的无机填料引入季铵化聚（2,6-二甲基-1,4-苯醚）（QPPO）基质中，合成了一系列功能化无机/有机复合阴离子交换膜（AEMs），用于通过扩散渗析（DD）过程回收酸。傅里叶变换红外（FTIR）光谱清楚地证明了功能化无机/有机复合AEMs的制备，随后进行的膜特性测量，如离子交换容量（IEC）、线性溶胀率（LSR）和吸水率（W），为我们提供了填料的最佳负载条件，且没有不希望的填料颗粒聚集。这些复合AEMs表现出2.18至2.29 meq/g的IEC、13.33至18.52%的LSR和46.11至81.66%的W，具有足够的热、化学和机械稳定性。与商业膜相比，从HCl/FeCl人工酸性废水中回收酸的扩散渗析（DD）测试显示出高的酸DD系数（U）（0.022至0.025 m/h）和高的分离因子（S）（139 - 260）。此外，在60°C的酸性废水中作为加速苛刻条件放置2周后，所开发的AEMs具有可接受的稳定性（重量损失<20%）。这些结果清楚地表明，所开发的AEMs具有通过DD过程进行酸回收应用的足够潜力。
