JOURNAL OF MEMBRANE SCIENCE
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2025
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IF 9
Jiali Yu,Jiahui Li,Haipeng Zhu,Gongping Liu,Wanqin Jin
Membrane technology can reduce the energy consumption of alcohol/water separation process, while the membrane performance still needs to be improved. This study reports a fluoride-mediated hydrophobic zeolite incorporated polydimethylsiloxane (PDMS) membrane for highly selective separating ethanol from aqueous solution. A fluoride-assisted synthesis strategy was proposed to achieve synergistic control over the morphology and surface chemical properties of siliceous zeolites. Comprehensive characterizations revealed that fluoride-mediated MFI zeolite (F-MFI) possessed significantly lower silanol density and superior hydrophobicity compared to conventional hydroxide-synthesized MFI zeolite (Si-MFI), thereby improving the selective permeation of ethanol over water. The optimal F-MFI nanoplates (∼150 nm thickness) with high crystallinity were uniformly incorporated into the PDMS membrane, achieving outstanding performance for separating 5 wt% ethanol/water mixture at 40 °C (total flux of 1409 g m −2 h −1 and a separation factor of 19.7—approximately twice that of the pure PDMS membrane). This work provides a high-performance ethanol-selective membrane, and also demonstrates the importance of synthesis condition on the morphology and functionality of filler and the performance of resulting mixed-matrix membrane.
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2022
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IF 10.53
Yaqi Wang,Tanlong Xue,Zhihao Si,Chang Liu,Shuai Yang,Guozhen Li,Yan Zhuang,Peiyong Qin
Recently, the preparation of polymeric membranes by UV-induced polymerization is encouraged due to the ultrafast curing and controllable operation. However, the long-period exposure under UV light has a great threat to both the environment and operators. Herein, we developed the visible-light-induced polymerized PDMS membrane for the pervaporative separation of furfural . The differences among photoinitiator ethyl(2,4,6-trimethylbenzoyl)phenylphosphinate (TPO-L), diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide (TPO) and 2-hydroxy-2-methylpropiophenone (1173) in the polymerization kinetics , membrane structure and separation performance are compared. Results show that the absorbance of TPO-L matches 405 nm of the visible light region; and it can be well dispersed and compatible with PDMS and obtain high initiation efficiency. Furthermore, the conditions including TPO-L concentration and PDMS viscosity are optimized, and the prepared membrane has an outstanding pervaporation performance containing 1299.5 g m −2 h −1 of total flux and 40.2 of furfural separation factor. Importantly, the ultrafast and continuous preparation process of membrane is operated by a home-made machine, indicating the wonderful potential for its large-scale application.
研究领域:
材料科学
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化学工程
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高分子化学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Penglong Yao,Zhaosheng Yan,Aoqun Jian,Jinsuo Bai,Haoyu Wang,Xing Guo,Shengbo Sang,Chuangang Zhou,Dong Zhao,Xiushan Dong
The real-time detection of neurotransmitters had attracted more attention due to the potential to provide vital information for pathology research, disease diagnosis, and clinical efficacy evaluation. Here, a magnetic-mediated nano sensor was developed to improve sensitivity for detection of serotonin (5-HT). The PDMS membrane doped with magnetic particles serves as a conversion element, enhancing the deformation of the thin film caused by surface stress under the action of a magnetic field and amplifying the resistance response signal of the nano sensor. The 5-HT detection associated with neurotransmitter diseases serve as a proof of concept revealing the magnetic sensitization. The detection limit of the 5-HT was decreased to 3.21 nM in the linear range of 5–500 nM, which was lower than that of the nano sensor without magnetic field. The clinical 5-HT samples were also been accurately detected, indicating a positive application potential of the as-prepared magnetic-mediated nano sensor. All these results reveal the high sensitivity and practicality of the as-prepared magnetic-mediated nano sensor and provide a new method for neurotransmitter diseases diagnosis.
研究领域:
神经科学
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生物传感器
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疾病诊断
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2018
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IF 6.578
Heng Mao,Hong-Gang Zhen,Ali Ahmad,Ao-Shuai Zhang,Zhi-Ping Zhao
Biofuels separation using membranes becomes one of the research focuses in the field of renewable energy. In this study, a series of mixed matrix membranes (MMMs) with defect-free active layer around 1 µm thickness were elaborately prepared through interfacial synthesis for ethanol permselective pervaporation . Polydimethylsiloxane (PDMS) was employed as polymer matrix , which adjusted the nucleation of MOF precursors to in situ generate ZIF-8 nanoparticles . Within the active layer, the resultant ZIF-8 nanoparticles provided the preferential pathways for ethanol due to their ultrahigh adsorption capacity and super-hydrophobicity. Moderate aggregation could form the relatively continuous diffusion pathways. This approach rendered the uniform dispersion of ZIF-8 nanoparticles within PDMS matrix and their excellent compatibility. The ZIF-8 nanoparticles endowed the membranes with enhanced ethanol affinity, hydrophobic property, and thermal stability. More importantly, the ZIF-8 nanoparticles substantially reduced the permeation energy barriers of the membrane for penetrants. The membranes displayed the simultaneous increase in permeation flux and separation factor when utilized for ethanol recovery from aqueous solution, revealing the desirable anti-tradeoff effect. Particularly, the resultant membrane exhibited a superior pervaporation performance with relatively high permeation flux (1778 g · m -2 · h -1 ) and comparable separation factor (12.1) in separating 5.0 wt% ethanol aqueous solution at 40 °C.
研究领域:
可再生能源
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材料科学
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化学工程
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Zhenfan Wu,Jing Chen,Zezhi Chen,Huijuan Gong,Xiaofeng Guo,Lu Chen
Membrane separation, a green and efficient gas purification method, has been underexplored for removing volatile methyl siloxanes (VMS) from biogas. This study investigates the feasibility of removing VMS from biogas through polydimethylsiloxane (PDMS) membranes. Permeation tests revealed that PDMS membranes exhibit exceptional permeability to D4 (octamethylcyclotetrasiloxane, a representative VMS compound), with a permeance of 1492.37 GPU, significantly higher than for CH 4 and CO 2 . The selectivity values for D4/CH 4 and CO 2 /CH 4 were 75.26 and 9.80, respectively, demonstrating the membrane’s dual potential for D4 removal and CH 4 recovery. The permeation mechanism of D4 in PDMS was elucidated using density functional theory (DFT) calculations and molecular dynamics (MD) simulations. The results revealed that D4 permeation in PDMS is driven by favorable solubility compatibility, with dissolution being the rate-limiting step. Furthermore, the 40-hour continuous permeation test demonstrated the long-term stability of the PDMS membrane. Process simulation using PRO II software evaluated the engineering application of PDMS membranes for biogas purification, identifying a trade-off between maximizing D4 removal and minimizing CH 4 loss. To address this challenge, an optimized strategy was proposed through PDMS layer thickening. By increasing the thickness of the PDMS layer from 3.32 μm to 15.27 μm, the selectivity of the PDMS membrane for D4/CH 4 was enhanced. PRO II simulation results demonstrated that the thickened membrane could reduce the D4 concentration in simulated biogas from 50 mg/m 3 to 0.79 mg/m 3 , with a CH 4 loss rate of only 3.39 %, meeting the requirements for engineering applications. This study provides a novel and sustainable approach for removing siloxane from biogas, highlighting its potential for practical applications and future research.
研究领域:
膜科学
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环境工程
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化学工程
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材料科学
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可再生能源
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产品关联
DOI
高影响因子
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