JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Qichao Ding,Kedi Dong,Xinyu Si,Tonghu Xiao,Xing Yang
Amphiphobic membranes have attracted much attention in membrane distillation (MD) applications, due to its potential in simultaneously resisting membrane wetting and fouling when treating complex wastewater. The current amphiphobic membranes often require non-trivial design of multilevel re-entrant structure. Here we proposed a new class of amphiphobic membranes without multilevel re-entrant surface, by creating a composite poly(vinylidene fluoride)/polyvinyl alcohol/SiO 2 membrane with asymmetric structure and well-controlled small surface pores via the NTIPS method, followed by direct fluorination via chemically binding the –OH of polyvinyl alcohol and low surface energy moieties 1H,1H,2H,2H-perfluorodecyl-triethoxysilane, assisted by 3-aminopropyltriethoxysilane and trimesoyl chloride. The amphiphobic membrane showed superior liquid entry pressure above 5 bar with various simulated saline feeds containing surfactants and organic pollutants. The amphiphobic membrane demonstrated robust anti-wetting and anti-fouling performance through a series of 24-h direct contact MD experiments using the above feeds, presenting stable water flux and high rejection, e.g., flux of 50.6 kg/(m 2 ·h) and rejection >99.9 % with feed containing 3.5 wt% NaCl, 1 mM FA, and 2 mM SDS. The results demonstrated the fabrication of robust amphiphobic membrane through simple procedure utilizing the synergy between pore structure and surface chemistry, inspiring more efforts to design adequate membranes for treating complex wastewater.
研究领域:
材料科学
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环境工程
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化学工程
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2022
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IF 10.383
Qing Hu,Chaofeng Zhu,Wen Yan,Yang Wang,Songlin Cui,Xihai Chen,Bo Liu
Membranes composed of two-dimensional (2D) materials suffer from low stability and structural swelling and are usually restricted to applications in aqueous systems. Among various 2D materials, graphitic phase carbon nitride (GCN, g-C3N4) has shown great application potential owing to its structural tunability. Herein, we develop a coordination-assisted strategy to regulate the GCN layer spacing and chemical environment via copper ion (Cu2+) coordination-assisted intercalation of enantiopure (1S,2S)-(−)-1,2-diphenyl-1,2-ethanediamine (DPE) between GCN nanosheets. The obtained GCN-Cu-DPE membrane is continuous and intact, free of cracks and pinholes, stable under acidic and alkaline conditions, and exhibits water permeability above 215 L m–2 h–1 bar–1 and a high rejection rate to dye molecules. The membrane is amphiphilicity and thus allows both polar solvent (water) and nonpolar solvent (hexane) to freely pass through. Remarkably, the permeation rate is proportional to the viscosity of the solvent. Benefiting from the chiral space between nanosheets, the GCN-Cu-DPE membrane shows selective permeation of aspartic acid racemate in aqueous systems and limonene racemate in the organic phase. Our work demonstrates a general and promising strategy for chiral membrane fabrication toward high-value-added chiral separation, especially in the pharmaceutical industry.
研究领域:
材料科学
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化学工程
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分离技术
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产品关联
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
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2024
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IF 4.4
Xiaojing Zhang,Kexin Chen,Aman Liu,Jiafeng Qian,Jian Li,Chenyi Wang
A series of amphiphilic ion exchange membranes (50PS–PBP-x) containing propyl sulfonic acid, long octadecyl side chains, and piperidinium quaternary ammonium structures are designed and prepared by the Menshutkin reaction of poly(biphenyl piperidinium)s with sodium 3-bromopropanesulfonate and 1-bromooooctadecane. The surface morphology and microphase separation structures of the amphiphilic membranes are observed by scanning electron microscopy (SEM) and atomic force microscopy (AFM), respectively. Their water uptake and swelling ratio are in the range of 9.2–20.2 and 3.7–7.8%, respectively. The area resistances and vanadium ion permeabilities for these membranes are in the range of 0.35–0.51 Ω cm2 and 1.9 × 10–7–4.7 × 10–7 cm2 min–1, respectively. The vanadium redox flow battery based on the representative 50PS–PBP-30 membrane also exhibits good performance. Its maximum energy efficiency reaches 81.7% and does not obviously decline after 200 cycles of running.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2025
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IF 9
Meijie Wang,Yunzhuo Xu,Jiamei Sun,Dai Shi,Youqing Tian,Hanyang Liu,Beili Lu,Lirong Tang,Jianhua Lv,Xingzhong Cao,Biao Huang,Xinda You
Ultrathin membranes with fast solvent transport are promising in organic solvent nanofiltration. However, achieving high permeance for both polar and non-polar solvents remain challenging. Here we report ultrathin amphiphilic membranes (UAPMs) polymerized from hydrophobic terpenoid molecules and hydrophilic polyamines that enable fast and versatile solvent transport. The terpenoid carboxylic acid (TCA) in the organic phase react with polyethyleneimine (PEI) in the aqueous phase at the liquid-liquid interface, during which the glutaraldehyde is added into the aqueous phase to enhance the crosslinking of polymeric network and thus forming UAPMs. Regulating the ratio of hydrophilic to hydrophobic components allow for the precise manipulation of the surface polarity of UAPMs, rendering affinity to both polar and non-polar organic solvents. The increased PEI/TCA ratio also provides more amine sites to bind with the carboxylic monomers and thus generating denser and thicker membranes. The optimized UAPM demonstrates high permeance values of 175.9 L m −2 h −1 bar −1 for polar ethanol and 116.5 L m −2 h −1 bar −1 for non-polar n -hexane, with a molecular weight cut-off of 591 Da, which achieves 96.4 % rejection of Reactive Red in ethanol and 94.8 % rejection of Chlorophyll in n -hexane. Our structural design of UAPMs may pave a new avenue for engineering high-performance molecular-separation membranes.
研究领域:
材料科学
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化学工程
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膜技术
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2020
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IF 7.183
Ziwei Dong,Mengting Di,Lei Hu,Li Gao,Xiaoming Yan,Xuehua Ruan,Xuemei Wu,Gaohong He
A novel hydrophilic/hydrophobic bi-comb-shaped amphoteric membrane was for the first time designed by the one-pot reactions of PBI with bromohexane and 1,3-propanesultone. The sulfonic acid chain promotes the formation of amphoteric ion clusters, while the alkyl side chain enhances the packing of hydrophobic segments. This unique structure design optimizes the segregated microphase morphology of the membrane, which is proved by TEM. Compared to the membrane without alkyl side chain, the bi-comb-shaped membrane shows a lowered area resistance (0.58 vs. 0.96 Ω cm 2 ) as well as a reduced swelling ratio (11.7% vs. 14.3%). As a result, the cell with the bi-comb-shaped membrane exhibits improved voltage efficiency, thus achieving increased energy efficiency. In addition, the membrane of this structure occupies excellent cycle stability. The cell efficiencies maintain almost stable for 250 cycles, and the chemical structure has no change after immersing in the electrolyte solution for 28 days.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2018
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IF 6.578
Huiting Shan,Jun Liu,Xipeng Li,Yi Li,F. Handan Tezel,Baoan Li,Shichang Wang
Membrane distillation, which can utilize low grade energy, has attracted significant attention recently. However, membrane fouling is a big issue impeding its development and industrialization. Hence, it is essential to prepare amphiphobic membrane for comprehensive anti-fouling performance. Herein, a facile and biomimetic method is explored to design amphiphobic surface with special structure and controllable wettability . Commercial polyvinylidene fluoride (PVDF) was primarily functionalized with polydopamine (PDA) coatings and then nanoscale roughness was introduced on the membrane surface, followed by the fluorination of 1H,1H,2H,2H-perfluorodecanethiol. It is revealed that the amphiphobic property can be accurately controlled by controlling the dosage of Ag + . When the concentration of Ag + is 300 mM, the water and oil contact angle of the optimal membrane can achieve 167.6 ± 0.27° and 136.9 ± 0.4°, respectively, while the water sliding angle is only 3 ± 0.1°, which demonstrates prominent superhydrophobicity and oleophobicity. Furthermore, the amphiphobic membrane exhibits excellent chemical and thermal stability under harsh conditions as well as outstanding comprehensive anti-fouling capacity with higher flux and excellent salt rejection in the long-term direct contact membrane distillation (DCMD) experiments, which shows promising potentials for application in the field of membrane distillation.
研究领域:
材料科学
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化学工程
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环境科学
✓ 已验证
DOI
高影响因子
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