Kamana Emmanuel
University of Science and Technology of China
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Publication
Featured researches published by Kamana Emmanuel.
Journal of Materials Chemistry | 2017
Abhishek N. Mondal; Yubin He; Liang Wu; Muhammad Imran Khan; Kamana Emmanuel; Md. Masem Hossain; Liang Ge; Tongwen Xu
We acquired herein a novel pendant type anion exchange membrane by grafting brominated poly(2,6-dimethyl-1,4-phenylene oxide) (BPPO) with HLTEI (1-(2-(hexylthio)ethyl)-1H-imidazole), a monomer synthesized via click chemistry. The membrane shows improved hydroxide conductivity because of the flexible side chain induced microphase-separated morphology. Low water uptake is the added benefit of the synthesized membrane.
Separation Science and Technology | 2016
Muhammad Imran Khan; Abhishek N. Mondal; Kamana Emmanuel; Md. Masem Hossain; Noor Ul Afsar; Liang Wu; Tongwen Xu
ABSTRACT In this manuscript, the preparation of pyrrolidinium-based anion-exchange membranes (AEMs) from brominated poly(2,6-dimethyl-1,4-phenyleneoxide) (BPPO) is reported. Prepared membranes were completely characterized in terms of Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), atomic force microscopy (AFM), ion-exchange capacity (IEC), water uptake (WR), linear expansion ratios (LER), mechanical stability, acid stability, etc. Excellent thermal, mechanical and acid stability can be observed for prepared membranes. Prepared membranes were used in diffusion dialysis (DD) process for acid recovery from model waste HCl/FeCl2 solution. The dialysis coefficient of HCl (UH) is found to be in the range of 0.018–0.049 m/h, whereas the separation factor (S) was obtained as 36.24–66.39. Prepared membranes show much better DD performance than that of commercial fibre–supported DF-120B membrane (0.004 m/h for UH, 24.3 for S at 25°C). Prepared membranes got the potential to be used as a promising candidate for acid recovery via DD.
RSC Advances | 2017
Abhishek N. Mondal; Yubin He; Liang Ge; Liang Wu; Kamana Emmanuel; Md. Masem Hossain; Tongwen Xu
A novel side-chain-type anion exchange membrane (AEM) is synthesized using thiol-ene click chemistry and the Menshutkin reaction. The prepared membranes are fully characterized and successfully mitigate the trade-off between conductivity and water uptake. Side-chain-type polymer electrolyte membranes with moderate hydroxide conductivity and improved water uptake are obtained. The thiol-ene click reaction is employed for the synthesis of active monomer 9-(2-((3-(triethoxysilyl)propyl)thio)ethyl)-9H-carbazole (TESPTEC). Using the Menshutkin reaction, TESPTEC is introduced into the brominated poly(2,6-dimethyl-1,4-phenylene oxide) (BPPO) backbone. The NVC-50 membrane shows a maximum hydroxide conductivity of 19.84 ± 1.81 mS cm−1 at 20 °C, and 54.69 ± 2.91 mS cm−1 at 60 °C. However, at 20 °C, the water uptake of the membrane NVC-50 is only about 18.36 wt%. After 12 days of alkaline treatment, the NVC-50 membrane shows better alkaline stability than the conventional QPPO membrane.
Separation Science and Technology | 2017
Noor Ul Afsar; Dongbo Yu; Congliang Cheng; Kamana Emmanuel; Liang Ge; Bin Wu; Abhishek N. Mondal; Muhammad Imran Khan; Tongwen Xu
ABSTRACT We report polyvinyl alcohol (PVA)-based hybrid membranes composed of salt of lignin sulfonic acid (LSA) and tetraethyl orthosilicate. The concentration of LSA with respect to PVA varied from 10% to 40%. The hybrid membranes showed water uptake (WU) in the range of 122–210%, ion exchange capacities in the range of 0.32–0.75 mmol g−1, dialysis coefficient (UOH) from 0.0068 to 0.0119 m h−1, and selectivity (S) from 15 to 26. The hybrid membranes also showed thermal and mechanical stability.
Frontiers of Chemical Engineering in China | 2018
Erigene Bakangura; Yubin He; Xiaolin Ge; Yuan Zhu; Liang Wu; Jin Ran; Congliang Cheng; Kamana Emmanuel; Zhengjin Yang; Tongwen Xu
Poly(2,6-dimethyl-1,4-phenylene oxide) was tethered with a 1,5-disubstituted tetrazole through a quaternary ammonium linkage. The formation of a tetrazole-ion network in the resulting polymers was found to promote the hydroxide ion transport through the Grotthus-type mechanism.
Journal of Membrane Science | 2016
Kamana Emmanuel; Congliang Cheng; Bakangura Erigene; Abhishek N. Mondal; Md. Masem Hossain; Muhammad Imran Khan; Noor Ul Afsar; Ge Liang; Liang Wu; Tongwen Xu
Desalination | 2017
Muhammad Imran Khan; Chunlei Zheng; Abhishek N. Mondal; Md. Masem Hossain; Bin Wu; Kamana Emmanuel; Liang Wu; Tongwen Xu
Desalination | 2016
Muhammad Imran Khan; Abhishek N. Mondal; Bin Tong; Chenxiao Jiang; Kamana Emmanuel; Zhengjin Yang; Liang Wu; Tongwen Xu
Journal of Membrane Science | 2016
Erigene Bakangura; Congliang Cheng; Liang Wu; Yubin He; Xiaolin Ge; Jin Ran; Kamana Emmanuel; Tongwen Xu
Journal of Membrane Science | 2016
Abhishek N. Mondal; Chunlei Zheng; Congliang Cheng; Jibin Miao; Md. Masem Hossain; Kamana Emmanuel; Muhammad Imran Khan; Noor Ul Afsar; Liang Ge; Liang Wu; Tongwen Xu