JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Xuehui Ge,Ya'nan Bian,Zhengke Tan,Yafei Cheng,Weixiong Jian,Bin Wu,Xiaocheng Lin
The development of anion exchange membranes (AEMs) that synergistically combine high performance with robust stability is essential for optimizing diffusion dialysis (DD) acid recovery. In response to this need, we introduce a novel strategy employing bromomethylated polymers of intrinsic microporosity (PIM-Br), pre-crosslinked with pentamethyldiethylenetriamine (PMDETA), followed by subsequent simultaneous crosslinking and cationization with 4,4′-bipyridine (BPY). This approach results in AEMs with expansive free volume (specific surface area = 163.55 m 2 g −1 ), high mechanical strength (tensile stress = 22.14 MPa), and exceptional resistance to both acidic environments and organic solvents, thereby enhancing the efficacy of acid recovery. Notably, the optimal CPIM-BPY-5h exhibits superior performance ( U H + = 51.07 × 10 −3 m h −1 , S H + / F e 2 + = 52.16) in the HCl/FeCl 2 system at 25 °C, outperforming the commercial DF-120 AEM by approximately 6.0-fold in U H + and over 2.8-fold in S H + / F e 2 + , while demonstrating comparable performance to our previous porous AEMs derived from ultrafiltration membranes, which, based on current literature, achieve unprecedented U H + values. However, the CPIM-BPY-5h distinguishes itself with significantly enhanced mechanical integrity. This work highlights the effectiveness of our strategy in producing membranes with excellent ion transport capabilities, mechanical strength, and acid and solvent stability, making them promising candidates for high-performance acid recovery applications.
研究领域:
高分子化学
·
膜科学
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Qingji Wang,Yilin Wang,Dan Wang,Xueying Yang,Ying Tang,Mingna Feng,Mingxia Wang,Xuemin Li,Feng Yan
Nanofiltration (NF) stands as a pivotal method for lithium resource recovery. Nonetheless, traditional NF membranes predominantly rely on size exclusion and the Donnan effect, necessitating elevated operating pressures and encountering substantial hurdles in terms of ion selectivity for lithium ions. Inspired by the host–guest recognition of crown ethers toward alkali metal ions, we prepared a crown ether-functionalized loose NF membrane (CE-LNF) via interfacial polymerization of diamino-dibenzo-14-crown-4 (DAB14C4) and trimesoyl chloride on a chloromethylated polysulfone substrate. The preparation conditions of the CE-LNF membranes were systematically optimized. Results revealed that the polyamide (PA) layer structure could be precisely tuned by changing the solvent and concentration of DAB14C4. The diffusion dialysis process with low energy consumption was applied in the Mg2+/Li+ separation experiment. Interestingly, the CE-LNF membrane achieved a unique “Li+ repulsion-Mg2+ permeation” result owing to the efficient host–guest recognition of Li+ by DAB14C4 on the PA layer. During the diffusion process, the transmembrane flux of Mg2+ (0.5 mol·m–2·h–1) surpassed that of Li+ (0.01 mol·m–2·h–1) by 50-fold, leading to a significant reduction in the Mg2+/Li+ ratio in the feed (from 19.5:1 to 5.2:1) and generating a Mg2+-enriched permeate. This work proposes a novel strategy for Mg2+/Li+ separation, where CE-LNF-based continuous diffusion dialysis serves as an energy-efficient, nonpressure-driven pretreatment for high Mg2+/Li+ ratio brines. The process not only produces high-purity Mg2+ solutions but also facilitates subsequent Li+ recovery via secondary CE-LNF diffusion or conventional extraction methods.
研究领域:
膜科学
·
分离技术
·
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Haofan Wang,Zhifei Wu,Xu Zhang,Li Liu,Deqing Liu,Jin Ran,Dawei Zhang
Conventional polymer anion exchange membranes (AEMs) suffer from the permeability-selectivity trade-off in diffusion dialysis (DD), limiting their efficiency in critical resource recovery scenarios (e.g., acid recycling and Li + extraction). To overcome this, this study incorporated polyaniline-modified MXene (PANI-Ti 3 C 2 T X ) nanosheets as transformative fillers into quaternized polyphenylene oxide (QPPO). The resulting PANI-Ti 3 C 2 T X -QPPO membranes enable dual-function DD for H + /metal cations and Li + /Mg 2+ separation. First, the as-prepared membranes exhibited enhanced microphase separation, yielding expanded hydrophilic domains (13.95–14.8 nm vs. 12.5 nm in pristine QPPO). Moreover, the 1.0 %-PANI-Ti 3 C 2 T X -QPPO membrane (with 1.0 wt% filler loading) achieved a peak ion exchange capacity of 1.75 mmol g −1 . For H + /metal cations separation: in HCl/FeCl 2 mixture, the H + dialysis coefficient ( U H ) reached 1.39–1.50 × 10 −2 m h −1 (2.7–2.9 times higher than the commercial TWDDA3S, 0.52 × 10 −2 m h −1 ); in HCl/AlCl 3 mixture, U H reached 1.50–1.53 × 10 −2 m h −1 , combined with exceptional selectivity ( S H/Al = 1568.4–1805.8), outperforming both TWDDA3S ( U H = 0.94 × 10 −2 m h −1 , S H/Al = 1423.8) and pristine QPPO ( U H = 1.27 × 10 −2 m h −1 , S H/Al = 1117). Finally, for Li + /Mg 2+ separation, the membranes delivered enhanced Li + flux with competitive S Li/Mg (11.4–12.4) against TWDDA3S (11.4) and QPPO (11.8). This study demonstrates that PANI-Ti 3 C 2 T X and QPPO synergistically overcome the permeability-selectivity trade-off in polymer membranes.
研究领域:
膜科学与技术
·
分离工程
·
材料化学
·
资源回收
·
离子传输
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Zhiyuan Yi,Kai Qu,Linlong Zhou,Qing Li,Zhi Xu
Metal-organic framework (MOF) glasses offer promising potential for membrane-based separations due to their excellent processability and structural versatility. However, their inherently disordered pore structures often lead to reduced porosity and limited ion transport performance. Here, we present a controlled unzipping polymer decomposition (CUPD) strategy for fabricating ZIF-62-based glass membrane featuring interconnected and negatively charged transport channels. Polystyrene sulfonic acid (PSS) is introduced as a sacrificial porogen during the melt-quenching process, wherein partial decomposition of its carbon backbone templates the formation of interconnected micropores. Simultaneously, the sulfonate groups stabilized by coordination with Zn sites, imparted negative surface charge to the channels, facilitating the selective ions transport. The optimized membrane fabricated by CUPD strategy achieves a Li + permeation rate of 0.64 mol m −2 h −1 , which is 60-fold higher than that of the pristine ZIF-62 glass membrane. This work provides a novel inspiration for constructing MOF-based membranes with interconnected channels with tunable property for advanced ion separation applications.
研究领域:
材料科学
·
膜分离技术
·
无机非金属材料
·
化学工程
·
离子传输
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 134
·期 39
·45333
·
IF 1.86
Xi Yue,Wenjun Wu,Guodong Chen,Canrui Yang,Shijun Liao,Xiuhua Li
Quaternary ammonium functionalized poly(arylene ether) (QPAE-Br) membranes based on 2,2′,6,6′-tetramethyl biphenol for diffusion dialysis (DD) were designed and successfully fabricated via nucleophilic substitution polycondensation, bromination, film casting, and quaternization. The structures, thicknesses, ion-exchange capacities (IECs), water uptakes, swelling ratios, ion conductivities, and mechanical properties of QPAE-Br were used to characterize the membranes. The influence of the membrane structures on the DD performances was investigated by DD tests of simulated industrial pickling wastewater (1 mol/L HCl, 0.1 mol/L FeCl 2 ). The DD results show QPAE-a (IEC = 1.51 mmol/g) as the best DD candidate. Predialysis treatments further improved the DD performances of QPAE-Br. QPAE-a exhibited an excellent proton diffusion coefficient ( ) of 0.033 m/h and a high separation factor ( S ) of 95.45 after the predialysis treatment at room temperature; these values were much higher than those of the commercial DF-120B membrane (0.004 m/h for and 24.3 for S at 25 °C) and other reported DD membranes. QPAE-a has great potential for acid recovery via DD. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45333.
研究领域:
高分子科学
·
膜技术
·
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Caidi Chen,Hengxin Xie,Yuyao Jiang,Yawen Chen,Yiran Liang,Gulihumaer Ruzetuoheti,Shijun Liao,Xiuhua Li,Biaowen Wei
In this work, AEMs based on poly(arylene ether sulfone)s skeletons were tailored with three kinds of hydrophobic components: biphenol (BP) with conjugate double benzene rings , bisphenol A (BPA) containing isolated double benzene rings and fluorene-9-bisphenol (FBP) with Cardo ring skeleton of four benzene rings. A series of quaternized poly(arylene ether sulfone)s (QPAES) membranes were fabricated successfully including QPAES-BP, QPAES-BPA and QPAES-FBP. The obtained membranes were applied in diffusion dialysis (DD) process of simulated waste acid (1.0 mol L -1 HCl and 0.2 mol L -1 FeCl 2 ) to figure out the influence of hydrophobic structures on DD performance. The dialysis coefficients ( U H + ) were in the range from 12.13 × 10 -3 m h -1 to 13.28 × 10 -3 m h -1 , while the separation factors (S) were in the range from 67.33 to 126.37. The resultant membranes show much better performance compared with the commercial TWDDA1 membrane ( U H + = 8.5 × 10 -3 m h -1 , S = 18.5). Interestingly, the membrane structures and properties revealed that the rigid aromatic component induced low water swelling, strong mechanical property and microphase separation , the nature of the structure offers high U H + as well as high S. The results show that the fabricated membranes are potential candidates for the acid recovery in diffusion dialysis, especially the QPAES-BP membrane tuned with rigid linear conjugated hydrophobic component.
研究领域:
高分子科学
·
膜技术
·
分离科学
·
材料工程
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）