Application of ZIF-67 as a crosslinker to prepare sulfonated polysulfone mixed-matrix membranes for enhanced water permeability and separation properties
High-performance sulfonated polysulfone (SPSf) mixed-matrix membranes (MMMs) were fabricated via a nonsolvent-induced phase separation (NIPS) method using zeolitic imidazolate frameworks-67 (ZIF-67) as a crosslinker. Acid-base crosslinking occurred between the sulfonic acid groups of SPSf and the te...
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IWA Publishing
2021
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oai:doaj.org-article:06486fbb8a8040c5aefc7373c63fb0ab2021-11-06T11:11:49ZApplication of ZIF-67 as a crosslinker to prepare sulfonated polysulfone mixed-matrix membranes for enhanced water permeability and separation properties0273-12231996-973210.2166/wst.2021.202https://doaj.org/article/06486fbb8a8040c5aefc7373c63fb0ab2021-07-01T00:00:00Zhttp://wst.iwaponline.com/content/84/1/144https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732High-performance sulfonated polysulfone (SPSf) mixed-matrix membranes (MMMs) were fabricated via a nonsolvent-induced phase separation (NIPS) method using zeolitic imidazolate frameworks-67 (ZIF-67) as a crosslinker. Acid-base crosslinking occurred between the sulfonic acid groups of SPSf and the tertiary amine groups of the embedded ZIF-67, which improved the dispersion of ZIF-67 and simultaneously improved the membrane strzcture and permselectivity. The dispersion of ZIF-67 in the MMMs and the acid-base crosslinking reaction were verified by energy-dispersive X-ray spectroscopy (EDX), X-ray diffractometry (XRD), Fourier-transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS). The pore structure analysis of MMMs indicated that filling ZIF-67 into SPSf enhanced the average surface pore sizes, surface porosities and more micropore in cross-sections. The crossflow filtrations showed the MMMs have higher pure water fluxes (57 to 111 L m−2 h−1) than the SPSf membrane (55 L m−2 h−1) but also higher bovine serum albumin (BSA) rejection rate of 93.9–95.8%, a model protein foulant. The MMMs showed a higher water contact angle than the SPSf membrane due to the addition of hydrophobic ZIF-67 and acid-base crosslinking, and also maintained high thermal stability evidenced by the thermogravimetric analysis (TGA) results. At the optimal ZIF-67 concentration of 0.3 wt%, the water flux of the SPSf-Z67-0.3 membrane was 82 L m−2 h−1 with a high BSA rejection rate of 95.3% at 0.1 MPa and better antifouling performance (FRR = 70%). Highlights An SPSf-matrix ultrafiltration (UF) membrane was developed by blending with hydrophobic ZIF-67.; ZIF-67 has good dispersibility and compatibility with SPSf of weak acid-base interaction.; Simultaneous enhancement in the permeability and selectivity of the MMMs.;Jiulong YinHai TangDi LiuTingting HuangLei ZhuIWA Publishingarticleacid-base crosslinkingmixed-matrix membranessulfonated polysulfonezif-67Environmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 84, Iss 1, Pp 144-158 (2021) |
| institution |
DOAJ |
| collection |
DOAJ |
| language |
EN |
| topic |
acid-base crosslinking mixed-matrix membranes sulfonated polysulfone zif-67 Environmental technology. Sanitary engineering TD1-1066 |
| spellingShingle |
acid-base crosslinking mixed-matrix membranes sulfonated polysulfone zif-67 Environmental technology. Sanitary engineering TD1-1066 Jiulong Yin Hai Tang Di Liu Tingting Huang Lei Zhu Application of ZIF-67 as a crosslinker to prepare sulfonated polysulfone mixed-matrix membranes for enhanced water permeability and separation properties |
| description |
High-performance sulfonated polysulfone (SPSf) mixed-matrix membranes (MMMs) were fabricated via a nonsolvent-induced phase separation (NIPS) method using zeolitic imidazolate frameworks-67 (ZIF-67) as a crosslinker. Acid-base crosslinking occurred between the sulfonic acid groups of SPSf and the tertiary amine groups of the embedded ZIF-67, which improved the dispersion of ZIF-67 and simultaneously improved the membrane strzcture and permselectivity. The dispersion of ZIF-67 in the MMMs and the acid-base crosslinking reaction were verified by energy-dispersive X-ray spectroscopy (EDX), X-ray diffractometry (XRD), Fourier-transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS). The pore structure analysis of MMMs indicated that filling ZIF-67 into SPSf enhanced the average surface pore sizes, surface porosities and more micropore in cross-sections. The crossflow filtrations showed the MMMs have higher pure water fluxes (57 to 111 L m−2 h−1) than the SPSf membrane (55 L m−2 h−1) but also higher bovine serum albumin (BSA) rejection rate of 93.9–95.8%, a model protein foulant. The MMMs showed a higher water contact angle than the SPSf membrane due to the addition of hydrophobic ZIF-67 and acid-base crosslinking, and also maintained high thermal stability evidenced by the thermogravimetric analysis (TGA) results. At the optimal ZIF-67 concentration of 0.3 wt%, the water flux of the SPSf-Z67-0.3 membrane was 82 L m−2 h−1 with a high BSA rejection rate of 95.3% at 0.1 MPa and better antifouling performance (FRR = 70%). Highlights
An SPSf-matrix ultrafiltration (UF) membrane was developed by blending with hydrophobic ZIF-67.;
ZIF-67 has good dispersibility and compatibility with SPSf of weak acid-base interaction.;
Simultaneous enhancement in the permeability and selectivity of the MMMs.; |
| format |
article |
| author |
Jiulong Yin Hai Tang Di Liu Tingting Huang Lei Zhu |
| author_facet |
Jiulong Yin Hai Tang Di Liu Tingting Huang Lei Zhu |
| author_sort |
Jiulong Yin |
| title |
Application of ZIF-67 as a crosslinker to prepare sulfonated polysulfone mixed-matrix membranes for enhanced water permeability and separation properties |
| title_short |
Application of ZIF-67 as a crosslinker to prepare sulfonated polysulfone mixed-matrix membranes for enhanced water permeability and separation properties |
| title_full |
Application of ZIF-67 as a crosslinker to prepare sulfonated polysulfone mixed-matrix membranes for enhanced water permeability and separation properties |
| title_fullStr |
Application of ZIF-67 as a crosslinker to prepare sulfonated polysulfone mixed-matrix membranes for enhanced water permeability and separation properties |
| title_full_unstemmed |
Application of ZIF-67 as a crosslinker to prepare sulfonated polysulfone mixed-matrix membranes for enhanced water permeability and separation properties |
| title_sort |
application of zif-67 as a crosslinker to prepare sulfonated polysulfone mixed-matrix membranes for enhanced water permeability and separation properties |
| publisher |
IWA Publishing |
| publishDate |
2021 |
| url |
https://doaj.org/article/06486fbb8a8040c5aefc7373c63fb0ab |
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