JOURNAL OF MEMBRANE SCIENCE
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2023
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IF 9.5
Yang Cao,Yinhua Wan,Chulong Chen,Jianquan Luo
Nanofiltration (NF) is considered a competitive technique for acidic stream treatments. However, poorly reactive acid-resistant monomers normally cause thick and uneven separation layers with ultra-low permeability. Herein, catalyst-anchored secondary polymerization is employed after the interfacial polymerization (IP) reaction between trimesoyl chloride (TMC) and 3-aminobenzenesulfonamide (ABSA) to fabricate an extremely acid-resistant NF membrane. Acylation catalysts in ethanol are grafted on the nascent layer by reacting with residual acyl chloride groups to enhance the monomer reactivity, while the ethanol-induced nascent layer structure regulation greatly improves the surface uniformity. Benefiting from the improved self-inhibition effect and optimized phase integrity of the modified IP process, the resulting acid-resistant membrane has unprecedented water permeance (up to 31.4 Lm −2 h −1 bar −1 ), desirable Na 2 SO 4 rejection (92.8%), high dye/H + selectivity and impressive acid stability (20 wt% of H 2 SO 4 for 50 days), outperforming almost all advanced acid-resistant NF membranes. Our work provides a versatile approach for the synthesis of high-performance specialty membranes.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Xia Zhan,Rui Ge,Teng Huo,Juan Lu,Jiding Li
Graphene oxide (GO) membranes exhibit ultrafast water permeation properties, which have been employed in various membrane-based separations including nanofiltration for dye removal from textile wastewater. However, it’s still a great challenge to achieve precise control over the microstructure of GO membranes and obtain ultrathin GO membranes with exceptional separation efficiency and robust membrane structure. Herein, in-situ confined interfacial polymerization (IP) is proposed for fabricating loose polyamide (PA)@GO hybrid membranes with high permeance and dye rejection as well as robust membrane stability. A new diamine of sulfadiazine (SA) with intrinsic hydrophilic and conjugated sulfonamide groups is employed as cross-linker of GO membranes and monomer of PA in IP process, simultaneously. PA is in-situ synthesized in confined GO interlayer via IP process and intercalated into GO interlayer, which enlarges the interlayer spacing of GO membranes gradiently. The combination of hydrophilic PA nanofiltration layer on GO membrane surface and the PA intercalated GO membrane with varying interlayer spacing creates hierarchical transport channels for water molecules, which contributes to the high water permeance. Moreover, the less reactive SA monomer endows PA@GO selective layer with appropriate negative charge and loose transport channels, which contributes to both of high permeance and dye rejection due to Donnon effect and size exclusion effect. The PA@GO hybrid membrane exhibits high permeance of 75.5 L/(m 2 ·h·bar) with TB dye rejection of 99.8 %, and exhibits low NaCl rejection of 11.6 %. Moreover, PA@GO hybrid membrane shows good fouling resistance and long-term stability as well as stable separation performance under harsh conditions. Both of high permeance and dye rejection of PA@GO hybrid membrane suggests that the integration of PA nanofiltration layer and GO membrane via in-situ confined interfacial polymerization can achieve the delicate control over the interlayer channel structure and the physicochemical properties of the membrane surface of GO membranes, which offers a promising method to break through the trade-off effect between permeability and selectivity of GO membranes.
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CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Yang Cao,Jianquan Luo,Chulong Chen,Yinhua Wan
Thin-film composite (TFC) membrane with high permeability and selectivity is appealing in the field of industrial wastewater treatment. However, polyamide (PA) TFC membranes, the premier choice for water treatment, undergo structure deterioration when continually exposed to acidic environment. Here, we apply surface activation assisted multi-step interfacial polymerization (IP) of 3-aminobenzenesulfonamide (ABSA) and trimesoyl chloride (TMC) to prepare a poly(amide-sulfonamide) (PASA) nanofiltration (NF) membrane with strong acid resistance. Thereinto, stable sulfonamide structure of ABSA effectively prevents the direct attack of acid to the PASA layer. Importantly, the nascent PASA layer acting as a hydrophilic interlayer can promote the subsequent IP reactions to form a less defective separation layer. When the surface activation (water soaking) is carried out during the multi-step IP process, the surface smoothness and hydrophilicity as well as the water permeability of the membrane are improved. Compared to the control, the resultant NF membrane exhibits ~200% increase in water permeability (12.4 Lm −2 h −1 bar −1 ) and >95.0% Na 2 SO 4 rejection. Benefiting from the strong steric exclusion, it also has high color removal when treating model acidic dye solutions (>99.3%) or real resin elution wastewater, showing great potential in the acid reuse for decolorization resin regeneration. Moreover, such membrane owns impressive long-term stability after exposure to strong acid (20 wt% of H 2 SO 4 for 30 days), and its hydrophilic surface contributes to excellent anti-fouling performance. This acid-resistant NF membrane with high permeability and stability provides a new perspective in acidic wastewater treatment.
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高影响因子
ACS ES&T Water
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2025
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IF 4.3
Yuqian Yang,Tiansheng Gao,Wenzhong Ma,Haicun Yang,Qiuyan Bi,Jing Zhong,Hideto Matsuyama
The growing demand for lithium-based materials stems predominantly from the rapid proliferation of renewable energy technologies. Given the growing demand for lithium, extracting the metal from salt lake brines has gained significant research attention. While positively charged nanofiltration (NF) membranes exhibit promising Mg2+/Li+ separation efficacy, the interfacial polymerization technique remains constrained by the inherent permeability-selectivity trade-off. This study optimized the microstructure and surface properties of the polyamide (PA) separation layer by regulating the additional amount of 3-aminobenzenesulfonamide (ABSA) based on the principle of hydrophilic steric dynamic equilibrium. The best-performing membrane, with 0.05 ABSA added, was the polyethylenimine (PEI)/trimesoyl chloride (TMC) NF membrane sample (PEI/ABSA-0.05-TMC), which retained 93.7% of Mg2+ and 28.4% of Li+. Compared to the PEI-TMC NF membrane without ABSA addition, water flux was increased from 12.5 L·m–2·h–1·bar–1 to 17.7 L·m–2·h–1·bar–1, MWCO was adjusted from 584 to 487 Da, and the corresponding separating factor of SLi,Mg increased from 8.51 to 13.3. Throughout prolonged experimental trials, the PEI/ABSA-0.05-TMC NF membrane demonstrated sustained separation stability. This work establishes a robust framework for optimizing NF membranes, providing a strategic pathway toward Mg2+/Li+ separation technologies.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Fei Han,Chunyang Yin,Lulu Liu,Hao Niu,Jianquan Luo,Yinhua Wan,Weijie Song,Wei Liu
Acidic wastewater, primarily generated from mining, metallurgical, and chemical industries, poses significant risks to both the environment and human health. Nanofiltration (NF) has emerged as a promising approach for treating such wastewater, yet the performance of acid-resistant membranes remains limited. In this work, acid-stable poly(amide-sulfonamide) (PASA) thin-film composite (TFC) NF membranes were fabricated via interfacial polymerization (IP), with the nonionic surfactant sorbitan monooleate (Span 80) employed to modulate the IP process, markedly enhancing membrane performance. Specifically, Span 80 was found to orient at the water–organic interface, significantly reducing interfacial tension and accelerating the diffusion of 3-aminobenzenesulfonamide (ABSA) monomers, thereby forming a thicker, highly cross-linked, and defect-free PASA selective layer. The optimized NF-0.1 membrane exhibited the smallest average pore size (0.635 nm) and a defect-free selective layer, with Na₂SO₄ and MgSO₄ (the concentration of the salt solution is 1000 mg/L) rejection exceeding 99 % and 95 %, respectively, while maintaining a moderate permeance of 3.05 ± 0.15 L·m −2 ·h −1 ·bar −1 . Long-term stability tests, pressure-resistance evaluations, and 35-day static acid immersion experiments demonstrated excellent operational stability, pressure tolerance, and acid resistance. Compared with previously reported acid-resistant NF membranes and commercial high-acid-stability membranes, NF-0.1 had a higher retention effect on monovalent and divalent sulfates. This work provides a simple and scalable strategy for producing defect-free, highly selective PASA acid-resistant NF membranes and highlights the critical role of surfactant-assisted monomer diffusion in optimizing membrane structure and performance.
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高影响因子
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