The Experts below are selected from a list of 288 Experts worldwide ranked by ideXlab platform
Yinhua Wan - One of the best experts on this subject based on the ideXlab platform.
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hydrophilic hydrophobic janus membranes with a dual Function Surface coating for rapid and robust membrane distillation desalination
Desalination, 2020Co-Authors: Yan Zhang, Fei Shen, Weifeng Cao, Yinhua WanAbstract:Abstract Membrane distillation (MD) is a promising technique for desalinating brine and purifying wastewater but low water flux and severe membrane fouling always plague its practical application. Developing new membranes with both high flux and fouling resistance is highly desirable. Here, a hydrophilic/hydrophobic Janus membrane that can simultaneously achieve rapid and robust desalination via vacuum MD (VMD) was designed and fabricated by architecting a polydopamine-based hydrophilic Surface coating on a commercial polytetrafluoroethylene (PTFE) membrane. Results demonstrated that such hydrophilic coating had the unique dual Function: (1) boosting water evaporation via tuning the state of confined water and timely water replenishment and (2) providing a hierarchical layer with highly underwater oleophobicity. Due to the synergistic effect, the Janus membrane flux soared to 84.3 ± 3.4 kg m−2 h−1 from 19.8 ± 1.5 kg m−2 h−1 of the commercial PTFE membrane when treating a 3.5 wt% NaCl solution (70 °C, −90 kPa), achieving an unprecedented 325.7% of flux enhancement, while also exhibiting long-term stability when desalinating oil-containing brine. Conversely, severe oil fouling occurred on the pristine PTFE membrane, quickly leading to near-zero flux. This work may provide a new platform and methodology for designing high-performance membranes for MD desalination.
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Hydrophilic/hydrophobic Janus membranes with a dual-Function Surface coating for rapid and robust membrane distillation desalination
Desalination, 2020Co-Authors: Yan Zhang, Fei Shen, Weifeng Cao, Yinhua WanAbstract:Abstract Membrane distillation (MD) is a promising technique for desalinating brine and purifying wastewater but low water flux and severe membrane fouling always plague its practical application. Developing new membranes with both high flux and fouling resistance is highly desirable. Here, a hydrophilic/hydrophobic Janus membrane that can simultaneously achieve rapid and robust desalination via vacuum MD (VMD) was designed and fabricated by architecting a polydopamine-based hydrophilic Surface coating on a commercial polytetrafluoroethylene (PTFE) membrane. Results demonstrated that such hydrophilic coating had the unique dual Function: (1) boosting water evaporation via tuning the state of confined water and timely water replenishment and (2) providing a hierarchical layer with highly underwater oleophobicity. Due to the synergistic effect, the Janus membrane flux soared to 84.3 ± 3.4 kg m−2 h−1 from 19.8 ± 1.5 kg m−2 h−1 of the commercial PTFE membrane when treating a 3.5 wt% NaCl solution (70 °C, −90 kPa), achieving an unprecedented 325.7% of flux enhancement, while also exhibiting long-term stability when desalinating oil-containing brine. Conversely, severe oil fouling occurred on the pristine PTFE membrane, quickly leading to near-zero flux. This work may provide a new platform and methodology for designing high-performance membranes for MD desalination.
Yan Zhang - One of the best experts on this subject based on the ideXlab platform.
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hydrophilic hydrophobic janus membranes with a dual Function Surface coating for rapid and robust membrane distillation desalination
Desalination, 2020Co-Authors: Yan Zhang, Fei Shen, Weifeng Cao, Yinhua WanAbstract:Abstract Membrane distillation (MD) is a promising technique for desalinating brine and purifying wastewater but low water flux and severe membrane fouling always plague its practical application. Developing new membranes with both high flux and fouling resistance is highly desirable. Here, a hydrophilic/hydrophobic Janus membrane that can simultaneously achieve rapid and robust desalination via vacuum MD (VMD) was designed and fabricated by architecting a polydopamine-based hydrophilic Surface coating on a commercial polytetrafluoroethylene (PTFE) membrane. Results demonstrated that such hydrophilic coating had the unique dual Function: (1) boosting water evaporation via tuning the state of confined water and timely water replenishment and (2) providing a hierarchical layer with highly underwater oleophobicity. Due to the synergistic effect, the Janus membrane flux soared to 84.3 ± 3.4 kg m−2 h−1 from 19.8 ± 1.5 kg m−2 h−1 of the commercial PTFE membrane when treating a 3.5 wt% NaCl solution (70 °C, −90 kPa), achieving an unprecedented 325.7% of flux enhancement, while also exhibiting long-term stability when desalinating oil-containing brine. Conversely, severe oil fouling occurred on the pristine PTFE membrane, quickly leading to near-zero flux. This work may provide a new platform and methodology for designing high-performance membranes for MD desalination.
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Hydrophilic/hydrophobic Janus membranes with a dual-Function Surface coating for rapid and robust membrane distillation desalination
Desalination, 2020Co-Authors: Yan Zhang, Fei Shen, Weifeng Cao, Yinhua WanAbstract:Abstract Membrane distillation (MD) is a promising technique for desalinating brine and purifying wastewater but low water flux and severe membrane fouling always plague its practical application. Developing new membranes with both high flux and fouling resistance is highly desirable. Here, a hydrophilic/hydrophobic Janus membrane that can simultaneously achieve rapid and robust desalination via vacuum MD (VMD) was designed and fabricated by architecting a polydopamine-based hydrophilic Surface coating on a commercial polytetrafluoroethylene (PTFE) membrane. Results demonstrated that such hydrophilic coating had the unique dual Function: (1) boosting water evaporation via tuning the state of confined water and timely water replenishment and (2) providing a hierarchical layer with highly underwater oleophobicity. Due to the synergistic effect, the Janus membrane flux soared to 84.3 ± 3.4 kg m−2 h−1 from 19.8 ± 1.5 kg m−2 h−1 of the commercial PTFE membrane when treating a 3.5 wt% NaCl solution (70 °C, −90 kPa), achieving an unprecedented 325.7% of flux enhancement, while also exhibiting long-term stability when desalinating oil-containing brine. Conversely, severe oil fouling occurred on the pristine PTFE membrane, quickly leading to near-zero flux. This work may provide a new platform and methodology for designing high-performance membranes for MD desalination.
Thomas Søndergaard - One of the best experts on this subject based on the ideXlab platform.
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Greens Function Surface integral equation method for the electromagnetics of a single subwavelength groove in a metal Surface
2016 IEEE ACES International Conference on Wireless Information Technology and Systems (ICWITS) and Applied Computational Electromagnetics (ACES), 2016Co-Authors: Thomas SøndergaardAbstract:A Greens Function Surface integral equation method for studying the electromagnetic properties of a single sub-wavelength groove in an otherwise flat metal Surface is presented. It can be applied to calculate scattering, extinction and absorption cross sections, and particularly the excitation of Surface plasmon polaritons propagating away from the groove along the metal Surface. The method is exemplified for light with wavelength 1700 nm being normally incident on a 60 nm wide rectangular groove in a gold Surface of varying depth, and it is demonstrated that for this example the scattering cross section at resonance can be app. 30 times the physical groove width. At the conference the method will be presented in further depth, including also a study of a broad range of grooves.
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Green’s Function Surface integral equation method for theoretical analysis of scatterers close to a metal interface
Physical Review B, 2008Co-Authors: Jesper Jung, Thomas SøndergaardAbstract:A method for theoretical analysis of light scattering by arbitrary shaped two-dimensional scatterers placed near a planar Surface between two media is presented. We show that light scattering by an object near a planar interface can be analyzed (exactly) using Green's Function Surface integral equations that are form invariant with those for a scatterer in free space. All effects of the planar interface structure are built into the Green's Function. An approach for calculating the Green's Function is presented along with far-field approximations that enable efficient evaluation of scattering into waves propagating out of the Surface plane and, in the case of a planar metal-dielectric interface, evaluation of scattering into Surface plasmon-polariton (SPP) waves propagating along the interface. Finally, the method is exemplified by analysis of light scattering by a nm-thin and sub-$\ensuremath{\mu}\text{m}$-wide gold strip (resonator) placed between 5 and 200 nm above a planar gold Surface. We compare the amount of scattering going into the out-of-plane propagating waves and SPPs, respectively, and, for our configuration, scattering into out-of-plane propagating waves dominates. Scattering into SPP waves has a maximum if the strip is placed approximately 20 nm from the Surface. We also find that when placing the gold strip more than 50 nm from the interface, the scattering resonance wavelength is practically independent of the distance, whereas changing the distance from 50 to 5 nm results in a $\ensuremath{\sim}400\text{ }\text{nm}$ redshift of the resonance wavelength.
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green s Function Surface integral equation method for theoretical analysis of scatterers close to a metal interface
Physical Review B, 2008Co-Authors: Jesper Jung, Thomas SøndergaardAbstract:A method for theoretical analysis of light scattering by arbitrary shaped two-dimensional scatterers placed near a planar Surface between two media is presented. We show that light scattering by an object near a planar interface can be analyzed (exactly) using Green's Function Surface integral equations that are form invariant with those for a scatterer in free space. All effects of the planar interface structure are built into the Green's Function. An approach for calculating the Green's Function is presented along with far-field approximations that enable efficient evaluation of scattering into waves propagating out of the Surface plane and, in the case of a planar metal-dielectric interface, evaluation of scattering into Surface plasmon-polariton (SPP) waves propagating along the interface. Finally, the method is exemplified by analysis of light scattering by a nm-thin and sub-$\ensuremath{\mu}\text{m}$-wide gold strip (resonator) placed between 5 and 200 nm above a planar gold Surface. We compare the amount of scattering going into the out-of-plane propagating waves and SPPs, respectively, and, for our configuration, scattering into out-of-plane propagating waves dominates. Scattering into SPP waves has a maximum if the strip is placed approximately 20 nm from the Surface. We also find that when placing the gold strip more than 50 nm from the interface, the scattering resonance wavelength is practically independent of the distance, whereas changing the distance from 50 to 5 nm results in a $\ensuremath{\sim}400\text{ }\text{nm}$ redshift of the resonance wavelength.
Weifeng Cao - One of the best experts on this subject based on the ideXlab platform.
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hydrophilic hydrophobic janus membranes with a dual Function Surface coating for rapid and robust membrane distillation desalination
Desalination, 2020Co-Authors: Yan Zhang, Fei Shen, Weifeng Cao, Yinhua WanAbstract:Abstract Membrane distillation (MD) is a promising technique for desalinating brine and purifying wastewater but low water flux and severe membrane fouling always plague its practical application. Developing new membranes with both high flux and fouling resistance is highly desirable. Here, a hydrophilic/hydrophobic Janus membrane that can simultaneously achieve rapid and robust desalination via vacuum MD (VMD) was designed and fabricated by architecting a polydopamine-based hydrophilic Surface coating on a commercial polytetrafluoroethylene (PTFE) membrane. Results demonstrated that such hydrophilic coating had the unique dual Function: (1) boosting water evaporation via tuning the state of confined water and timely water replenishment and (2) providing a hierarchical layer with highly underwater oleophobicity. Due to the synergistic effect, the Janus membrane flux soared to 84.3 ± 3.4 kg m−2 h−1 from 19.8 ± 1.5 kg m−2 h−1 of the commercial PTFE membrane when treating a 3.5 wt% NaCl solution (70 °C, −90 kPa), achieving an unprecedented 325.7% of flux enhancement, while also exhibiting long-term stability when desalinating oil-containing brine. Conversely, severe oil fouling occurred on the pristine PTFE membrane, quickly leading to near-zero flux. This work may provide a new platform and methodology for designing high-performance membranes for MD desalination.
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Hydrophilic/hydrophobic Janus membranes with a dual-Function Surface coating for rapid and robust membrane distillation desalination
Desalination, 2020Co-Authors: Yan Zhang, Fei Shen, Weifeng Cao, Yinhua WanAbstract:Abstract Membrane distillation (MD) is a promising technique for desalinating brine and purifying wastewater but low water flux and severe membrane fouling always plague its practical application. Developing new membranes with both high flux and fouling resistance is highly desirable. Here, a hydrophilic/hydrophobic Janus membrane that can simultaneously achieve rapid and robust desalination via vacuum MD (VMD) was designed and fabricated by architecting a polydopamine-based hydrophilic Surface coating on a commercial polytetrafluoroethylene (PTFE) membrane. Results demonstrated that such hydrophilic coating had the unique dual Function: (1) boosting water evaporation via tuning the state of confined water and timely water replenishment and (2) providing a hierarchical layer with highly underwater oleophobicity. Due to the synergistic effect, the Janus membrane flux soared to 84.3 ± 3.4 kg m−2 h−1 from 19.8 ± 1.5 kg m−2 h−1 of the commercial PTFE membrane when treating a 3.5 wt% NaCl solution (70 °C, −90 kPa), achieving an unprecedented 325.7% of flux enhancement, while also exhibiting long-term stability when desalinating oil-containing brine. Conversely, severe oil fouling occurred on the pristine PTFE membrane, quickly leading to near-zero flux. This work may provide a new platform and methodology for designing high-performance membranes for MD desalination.
Fei Shen - One of the best experts on this subject based on the ideXlab platform.
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hydrophilic hydrophobic janus membranes with a dual Function Surface coating for rapid and robust membrane distillation desalination
Desalination, 2020Co-Authors: Yan Zhang, Fei Shen, Weifeng Cao, Yinhua WanAbstract:Abstract Membrane distillation (MD) is a promising technique for desalinating brine and purifying wastewater but low water flux and severe membrane fouling always plague its practical application. Developing new membranes with both high flux and fouling resistance is highly desirable. Here, a hydrophilic/hydrophobic Janus membrane that can simultaneously achieve rapid and robust desalination via vacuum MD (VMD) was designed and fabricated by architecting a polydopamine-based hydrophilic Surface coating on a commercial polytetrafluoroethylene (PTFE) membrane. Results demonstrated that such hydrophilic coating had the unique dual Function: (1) boosting water evaporation via tuning the state of confined water and timely water replenishment and (2) providing a hierarchical layer with highly underwater oleophobicity. Due to the synergistic effect, the Janus membrane flux soared to 84.3 ± 3.4 kg m−2 h−1 from 19.8 ± 1.5 kg m−2 h−1 of the commercial PTFE membrane when treating a 3.5 wt% NaCl solution (70 °C, −90 kPa), achieving an unprecedented 325.7% of flux enhancement, while also exhibiting long-term stability when desalinating oil-containing brine. Conversely, severe oil fouling occurred on the pristine PTFE membrane, quickly leading to near-zero flux. This work may provide a new platform and methodology for designing high-performance membranes for MD desalination.
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Hydrophilic/hydrophobic Janus membranes with a dual-Function Surface coating for rapid and robust membrane distillation desalination
Desalination, 2020Co-Authors: Yan Zhang, Fei Shen, Weifeng Cao, Yinhua WanAbstract:Abstract Membrane distillation (MD) is a promising technique for desalinating brine and purifying wastewater but low water flux and severe membrane fouling always plague its practical application. Developing new membranes with both high flux and fouling resistance is highly desirable. Here, a hydrophilic/hydrophobic Janus membrane that can simultaneously achieve rapid and robust desalination via vacuum MD (VMD) was designed and fabricated by architecting a polydopamine-based hydrophilic Surface coating on a commercial polytetrafluoroethylene (PTFE) membrane. Results demonstrated that such hydrophilic coating had the unique dual Function: (1) boosting water evaporation via tuning the state of confined water and timely water replenishment and (2) providing a hierarchical layer with highly underwater oleophobicity. Due to the synergistic effect, the Janus membrane flux soared to 84.3 ± 3.4 kg m−2 h−1 from 19.8 ± 1.5 kg m−2 h−1 of the commercial PTFE membrane when treating a 3.5 wt% NaCl solution (70 °C, −90 kPa), achieving an unprecedented 325.7% of flux enhancement, while also exhibiting long-term stability when desalinating oil-containing brine. Conversely, severe oil fouling occurred on the pristine PTFE membrane, quickly leading to near-zero flux. This work may provide a new platform and methodology for designing high-performance membranes for MD desalination.
