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Porous ultrathin-shell microcapsules designed by microfluidics for selective permeation and stimuli-triggered

Frontiers of Chemical Science and Engineering   Pages 1643-1650 doi: 10.1007/s11705-022-2201-z

Abstract: Generally, microcapsules with solid shells lack selective permeation and only exhibit a simple releasewater-in-oil-in-water double emulsions as templates and design porous ultrathin-shell microcapsules for selective permeationporous ultrathin-shell microcapsules exhibit excellent properties, including tunable size, selective permeation

Keywords： microcapsule     emulsion     microfluidics     selective permeation     stimuli-triggered release    

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ethylene-co-vinyl alcohol) molecular weight and vinyl alcohol content on morphology, antifouling, and permeation

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 10,   Pages 1484-1502 doi: 10.1007/s11705-023-2331-y

Abstract: Various hydrophilic poly(ethylene-co-vinyl alcohol) (EVOH) were used herein to precisely control the structure and hydrodynamic properties of polysulfone (PSF) membranes. Particularly, to prepare pristine PSF and PSF/EVOH blends with increasing vinyl alcohol (VOH: 73%, 68%, 56%), the non-solvent-induced phase separation (NIPS) technique was used. Polyethylene glycol was used as a compatibilizer and as a porogen in N,N-dimethylacetamide. Rheological and ultrasonic separation kinetic measurements were also carried out to develop an ultrafiltration membrane mechanism. The extracted membrane properties and filtration capabilities were systematically compared to the proposed mechanism. Accordingly, the addition of EVOH led to an increase in the rheology of the dopes. The resulting membranes exhibited a microporous structure, while the finger-like structures became more evident with increasing VOH content. The PSF/EVOH behavior was changed from immediate to delayed segregation due to a change in the hydrodynamic kinetics. Interestingly, the PSF/EVOH32 membranes showed high hydrophilicity and achieved a pure water permeability of 264 L·m–2·h–1·bar–1, which was higher than that of pure PSF membranes (171 L·m–2·h–1·bar–1). In addition, PSF/EVOH32 rejected bovine serum albumin at a high rate (> 90%) and achieved a significant restoration of permeability. Finally, from the thermodynamic and hydrodynamic results, valuable insights into the selection of hydrophilic copolymers were provided to tailor the membrane structure while improving both the permeability and antifouling performance.

Keywords： polysulfone     blend modification     ultrafiltration membrane     formation hydrodynamics     poly(ethylene-co-vinyl alcohol) copolymer    

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A Predictive Instrument for Sensitive and Expedited Measurement of Ultra-Barrier Permeation Article

Jianfeng Wanyan, Kun Cao, Zhiping Chen, Yun Li, Chenxi Liu, Runqing Wu, Xiao-Dong Zhang, Rong Chen

Engineering 2021, Volume 7, Issue 10,   Pages 1461-1470 doi: 10.1016/j.eng.2021.02.017

Abstract: To detect trace amount of water vapor permeation through an ultra-barrier with extremely high sensitivityand a greatly reduced test period, a predictive instrument was developed by integrating permeation modelsAfter calibration, the lower detection limit for water vapor permeation is in the range of 10-7<permeation rate can be forecasted from non-steady-state results, thus enabling effective measurementof ultra-barrier permeation within a significantly shorter test period.

Keywords： Water vapor permeation     Ultra-barrier     Predictive model     Quadrupole mass spectrometer    

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Effect of PEG additives on properties and morphologies of polyetherimide membranes prepared by phase inversion

Jian CHEN, Jiding LI, Xia ZHAN, Xiaolong HAN, Cuixian CHEN,

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 3,   Pages 300-306 doi: 10.1007/s11705-009-0280-8

Abstract: (ethylene glycol) (PEG) additive as a pore-former on the structure formation of membranes and their permeation

Keywords： permeation     ethylene     filtration     PEI/NMP/PEG     membrane    

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Preparation and permeability of ZSM-35 zeolite membranes on porous stainless steel tubes

ZHU Gang, WANG Jinqu, ZHANG Yan, LU Jinming, XIU Jinghai

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 3,   Pages 217-220 doi: 10.1007/s11705-007-0039-z

Abstract: ethylenediamine as the template, compared with those with 1-butylamine as the template, showed relatively higher permeation

Keywords： single-component permeability     diffusion     different     permeation     orientation    

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Theoretical study on Janus graphene oxide membrane for water transport

Quan Liu, Mingqiang Chen, Yangyang Mao, Gongping Liu

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 4,   Pages 913-921 doi: 10.1007/s11705-020-1954-5

Abstract: Graphene oxide (GO) membranes have received considerable attention owing to their outstanding water-permeationIn this study, we performed molecular simulations to explore the permeation of a water–ethanol mixtureThis study contributes to explaining the role of oxidized regions in water permeation via GO membranes

Keywords： graphene oxide membrane     molecular dynamics simulation     water permeation     water-ethanol separation     oxidized    

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A CO and CO

Guoxing Chen, Marc Widenmeyer, Binjie Tang, Louise Kaeswurm, Ling Wang, Armin Feldhoff, Anke Weidenkaff

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 3,   Pages 405-414 doi: 10.1007/s11705-019-1886-0

Abstract: A constant oxygen permeation flux of about 0.63 mL·min ·cm at 1173 K through a 0.65 mm thick membrane

Keywords： K2NiF4 structure     oxygen permeation membrane     CO2 and CO resistances     CO    

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Novel methods by using non-vacuum insulated tubing to extend the lifetime of the tubing

Chenglong ZHOU,Guojin ZHU,Yongxiang XU,Jifei YU,Xiaoliang ZHANG,Hongzhi SHENG

Frontiers in Energy 2015, Volume 9, Issue 2,   Pages 142-147 doi: 10.1007/s11708-015-0357-7

Abstract: The analysis of the failure mechanics, namely hydrogen permeation of vacuum insulated tubing (VIT), indicated

Keywords： insulated tubing     cyclic steam stimulation     insulation material     thermal conductivity     foam-glass     hydrogen permeation    

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Development of CO2 Selective Poly(Ethylene Oxide)-Based Membranes: From Laboratory to Pilot Plant Scale

Torsten Brinkmann,Jelena Lillepärg,Heiko Notzke,Jan Pohlmann,Sergey Shishatskiy,Jan Wind,Thorsten Wolff

Engineering 2017, Volume 3, Issue 4,   Pages 485-493 doi: 10.1016/J.ENG.2017.04.004

Abstract: modules can be accurately predicted by specifically developed simulation tools, which employ single-gas permeation

Keywords： Gas permeation     Thin-film composite membrane     CO2 separation     Carbon capture and storage     Biogas    

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Title Author Date Type Operation

Porous ultrathin-shell microcapsules designed by microfluidics for selective permeation and stimuli-triggered

Journal Article

ethylene-co-vinyl alcohol) molecular weight and vinyl alcohol content on morphology, antifouling, and permeation

Journal Article

A Predictive Instrument for Sensitive and Expedited Measurement of Ultra-Barrier Permeation

Jianfeng Wanyan, Kun Cao, Zhiping Chen, Yun Li, Chenxi Liu, Runqing Wu, Xiao-Dong Zhang, Rong Chen

Journal Article

Effect of PEG additives on properties and morphologies of polyetherimide membranes prepared by phase inversion

Jian CHEN, Jiding LI, Xia ZHAN, Xiaolong HAN, Cuixian CHEN,

Journal Article

Preparation and permeability of ZSM-35 zeolite membranes on porous stainless steel tubes

ZHU Gang, WANG Jinqu, ZHANG Yan, LU Jinming, XIU Jinghai

Journal Article

Theoretical study on Janus graphene oxide membrane for water transport

Quan Liu, Mingqiang Chen, Yangyang Mao, Gongping Liu

Journal Article

A CO and CO

Guoxing Chen, Marc Widenmeyer, Binjie Tang, Louise Kaeswurm, Ling Wang, Armin Feldhoff, Anke Weidenkaff

Journal Article

Novel methods by using non-vacuum insulated tubing to extend the lifetime of the tubing

Chenglong ZHOU,Guojin ZHU,Yongxiang XU,Jifei YU,Xiaoliang ZHANG,Hongzhi SHENG

Journal Article

Wei Mingjie: Molecular Simulation Study on The Permeation Mechanism of Polyamide Reverse Osmosis Membrane

9 Jun 2022

Conference Videos

Development of CO2 Selective Poly(Ethylene Oxide)-Based Membranes: From Laboratory to Pilot Plant Scale

Torsten Brinkmann,Jelena Lillepärg,Heiko Notzke,Jan Pohlmann,Sergey Shishatskiy,Jan Wind,Thorsten Wolff

Journal Article