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学者姓名：王晓达
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Abstract ：
With the increasing health and environmental awareness, a growing demand for health-safe textiles has sparked significant interest in antibacterial alginate fibers loaded with silver nanoparticles (AgNPs). However, the existing preparation methods suffer from issues such as non-eco-friendly solvents, process inefficiency, and short-lasting antibacterial durability, limiting their applications. In this study, a simple, green, and efficient synthesis process for AgNPs was developed using the microfluidic technology coupled with ultraviolet/thermal fields, which produced nanoparticles with a uniform size (13.0 +/- 3.2 nm) and long-term stability (>4 months). Based on this method, a sodium alginate-based spinning process was designed to achieve in situ reduction of AgNPs during fiber spinning, with the silver loss controlled within 20%, a result seldom documented in the literature. Moreover, this process avoided interference from other reagents and ensured uniform distribution of AgNPs inside and on the surface of the fibers. More importantly, the AgNP-loaded fibers exhibited 99.99% highly efficient antibacterial activity against Staphylococcus aureus and Escherichia coli with a remarkably low AgNP content of 2000 mgkg(-1). Even after 50 washes, the antibacterial effect was still maintained at 96.88% and 95.05%, demonstrating excellent long-lasting antibacterial performance and significant application prospects.
Keyword ：
AgNPs AgNPs antibacterial property antibacterial property in situ in situ microfluidics microfluidics sodium alginate sodium alginate
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| GB/T 7714 | Liu, Huican , Lan, Xiaoqian , Yin, Yaran et al. Green Synthesis and Durable Antibacterial AgNP-Loaded Alginate Fibers Enabled by Microfluidic Technology Coupled with Ultraviolet/Thermal Fields [J]. | ACS APPLIED POLYMER MATERIALS , 2025 . |
| MLA | Liu, Huican et al. "Green Synthesis and Durable Antibacterial AgNP-Loaded Alginate Fibers Enabled by Microfluidic Technology Coupled with Ultraviolet/Thermal Fields" . | ACS APPLIED POLYMER MATERIALS (2025) . |
| APA | Liu, Huican , Lan, Xiaoqian , Yin, Yaran , Wang, Xiaoda , Chen, Xiufang , Zhou, Jiamin et al. Green Synthesis and Durable Antibacterial AgNP-Loaded Alginate Fibers Enabled by Microfluidic Technology Coupled with Ultraviolet/Thermal Fields . | ACS APPLIED POLYMER MATERIALS , 2025 . |
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Although it was experimentally verified the microchannels with periodic expansion structures can effectively intensify the mass transfer of the slug flow, little research has focused on their geometric design. Hereon, a numerical simulation is conducted to evaluate the impact of microchannel geometry on the mass transfer of slug flow. The square expansion unit performs better than the triangular and circular ones. With the increase of the length, width, and number of the expansion units, and the width of the constriction between the adjacent expansions, the mass transfer performance shows a non-monotonic variation, that is an initial increase followed by a decrease. The underlying reasons are analyzed by evaluating the mixing inside and outside the droplet and the effective mass transfer area. At the preliminarily optimized geometry, a novel mass transfer path, in which not only the droplet caps but also the droplet body becomes the effective mass transfer area, is observed. © 2024 Elsevier Ltd
Keyword ：
Mass transfer intensification Mass transfer intensification Numerical simulation Numerical simulation Periodic expansion microchannel Periodic expansion microchannel Slug flow Slug flow Structure design Structure design
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| GB/T 7714 | Han, Y. , Wang, X. , Yin, Y. . Geometry effect on the mass transfer of slug flow in the microchannels with periodic expansion units [J]. | Chemical Engineering Science , 2024 , 299 . |
| MLA | Han, Y. et al. "Geometry effect on the mass transfer of slug flow in the microchannels with periodic expansion units" . | Chemical Engineering Science 299 (2024) . |
| APA | Han, Y. , Wang, X. , Yin, Y. . Geometry effect on the mass transfer of slug flow in the microchannels with periodic expansion units . | Chemical Engineering Science , 2024 , 299 . |
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One of the important strategies for the scale-up of microreactors is sizing-up, which is conducted by increasing the hydrodynamic diameter of microreactors. However, the interphase mass transfer deteriorates seriously in the sizing-up. This work aimed to probe the possibility of adding an inert gas phase to offset the adverse effect of microreactor sizing-up on the mass transfer between two immiscible liquid phases. Using a high-speed camera, four flow patterns were observed in three capillaries with their diameters ranging from 0.8 to 3.0 mm. Empirical equations were given to describe the flow-pattern transitions. The influencing mechanism of the capillary diameter on the liquid–liquid mass transfer was analyzed by taking the effect of adding the inert gas phase into account. Finally, the evaluation of the energy consumption suggested that adding an inert gas phase to agitate the flow could utilize the input energy more efficiently to intensify the liquid–liquid mass transfer in the microchannel with a larger hydrodynamic diameter. Therefore, the method of inert gas agitation is a meritorious assistive technology in the sizing-up of microreactors. © 2024 Elsevier Inc.
Keyword ：
Energy efficiency Energy efficiency Flow pattern Flow pattern Gas agitation Gas agitation Gas–liquid-liquid three phases Gas–liquid-liquid three phases Mass transfer Mass transfer Microreactor Microreactor Process intensification Process intensification Scale-up Scale-up
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| GB/T 7714 | Huang, W. , Ren, X. , Xiao, L. et al. Sizing-up effect on the flow pattern and mass transfer of gas–liquid-liquid three-phase flow in microchannels [J]. | Experimental Thermal and Fluid Science , 2024 , 159 . |
| MLA | Huang, W. et al. "Sizing-up effect on the flow pattern and mass transfer of gas–liquid-liquid three-phase flow in microchannels" . | Experimental Thermal and Fluid Science 159 (2024) . |
| APA | Huang, W. , Ren, X. , Xiao, L. , Zheng, K. , Ge, X.-H. , Wang, X. . Sizing-up effect on the flow pattern and mass transfer of gas–liquid-liquid three-phase flow in microchannels . | Experimental Thermal and Fluid Science , 2024 , 159 . |
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Surfactant-stabilized multiphase emulsions are widely used. However, current studies on the dynamic adsorption of emulsions during flow are mainly focused on the droplet formation stage rather than the flow stage. In this study, the mass transfer of surfactants in microchannels during the droplet formation and flow phases (the overall process) was investigated and a mass transfer diffusion model and an adsorption kinetic model for emulsions were developed, which explained the mass transfer process in microchannels for low and high surfactant concentrations, respectively. Subsequently, dynamic interfacial tension values between the two phases were calculated using two surfactants (SDS and DTAB) to validate these models and the results were in good agreement with the experimental values. This study contributes to a deeper understanding of how surfactants diffuse throughout three-phase emulsions, thus shedding light on the mass transfer mechanisms inherent in these complex systems.
Keyword ：
dynamic mass transfer dynamic mass transfer microfluidic microfluidic model establishment model establishment surfactant surfactant three-phase emulsion structure three-phase emulsion structure
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| GB/T 7714 | Ge, Xue-hui , Jia, Bo , Shan, Zhiwei et al. The overall-process dynamic mass transfer research of surfactant at the three-phase emulsions interface [J]. | AICHE JOURNAL , 2024 , 71 (4) . |
| MLA | Ge, Xue-hui et al. "The overall-process dynamic mass transfer research of surfactant at the three-phase emulsions interface" . | AICHE JOURNAL 71 . 4 (2024) . |
| APA | Ge, Xue-hui , Jia, Bo , Shan, Zhiwei , Lin, Xiaocheng , Wang, Xiaoda . The overall-process dynamic mass transfer research of surfactant at the three-phase emulsions interface . | AICHE JOURNAL , 2024 , 71 (4) . |
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Predicting the critical transition condition for different behaviors of droplet flowing through a micro contraction is a classic academic issue, and there is currently a lack of a simple and universally applicable prediction formula. This article aims to construct critical transition conditions for different droplet behaviors through their char-acteristic time. In present work, the droplet behavior, including deformation and breakup, are observed in a locally contractive microchannel by a high-speed camera. By tracing the dynamic evolution of droplet interface, it is found that the essential differences between droplet deformation and breakup is whether the minimum neck width will be less than the critical value for the appearance of the irreversible collapse. Based on this, two characteristic times are proposed to describe the deformation and breakup processes, which well explain the trend of flow pattern transition lines. Two mathematical models are established for the two characteristic times, and the critical conditions for the transformation from deformation to breakup is derived from these models. The predicted results are in good agreement with the experimental results, indicating the applicability of the pro-posed method in this paper.
Keyword ：
Breakup Breakup Contraction -expansion microchannel Contraction -expansion microchannel Critical criterion Critical criterion Deformation Deformation Droplet breakup Droplet breakup
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| GB/T 7714 | Zou, Xinyuan , Luo, Wenli , Chang, Zhidong et al. Critical criterion for droplet breakup in a contractive microchannel [J]. | EXPERIMENTAL THERMAL AND FLUID SCIENCE , 2024 , 150 . |
| MLA | Zou, Xinyuan et al. "Critical criterion for droplet breakup in a contractive microchannel" . | EXPERIMENTAL THERMAL AND FLUID SCIENCE 150 (2024) . |
| APA | Zou, Xinyuan , Luo, Wenli , Chang, Zhidong , Wang, Xiaoda . Critical criterion for droplet breakup in a contractive microchannel . | EXPERIMENTAL THERMAL AND FLUID SCIENCE , 2024 , 150 . |
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An integrated microfluidic planar reactor is essential for achieving efficient and enhanced photocatalytic water treatment. Optimization of catalysts is an area of intense study owing to the need to enhance the performances of microreactors. A high-efficiency photocatalytic microreactor is presented here by combining a planar microreactor with a high-efficiency photocatalyst. TiO2 nanoparticles doped with Y and Yb were prepared to improve the photocatalytic reaction efficiency. First, better performance is achieved with the Y, Yb/TiO2 and TiO2 microreactors than conventional bulk reactors because of good photodegradation and a high reaction rate. Then, the Y, Yb/TiO2 film microreactor exhibits not only efficient catalytic activity with UV light but also higher photocatalytic activity under visible light irradiation than that achieved by a TiO2 film microreactor. The reaction rate constant of the Y, Yb/TiO2 film microreactor is approximately 0.530 s(-1), which is twice that of the TiO2 film microreactor. Moreover, the performances under continuous and intermittent reactions are compared to evaluate the stability of the microreactor, thereby building the foundation for practical application of continuous water treatment in the microreactor.The planar microreactor provides a convenient platform for studying photodegradation under various conditions, such as different temperatures, flow rates, light irradiation (UV and Vis), and reaction modes (continuous and intermittent).
Keyword ：
continuous water treatment continuous water treatment microreactor microreactor photodegradation photodegradation stability stability TiO2 TiO2
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| GB/T 7714 | Ge, Xue-hui , Wei, Nanjie , Hu, Xinyue et al. The integrated microfluidic photocatalytic planar reactor under continuous operation [J]. | FRONTIERS IN CHEMICAL ENGINEERING , 2024 , 6 . |
| MLA | Ge, Xue-hui et al. "The integrated microfluidic photocatalytic planar reactor under continuous operation" . | FRONTIERS IN CHEMICAL ENGINEERING 6 (2024) . |
| APA | Ge, Xue-hui , Wei, Nanjie , Hu, Xinyue , Xie, Qinyin , Wang, Xiaoda , Li, Ling et al. The integrated microfluidic photocatalytic planar reactor under continuous operation . | FRONTIERS IN CHEMICAL ENGINEERING , 2024 , 6 . |
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Abstract ：
One of the important strategies for the scale-up of microreactors is sizing-up, which is conducted by increasing the hydrodynamic diameter of microreactors. However, the interphase mass transfer deteriorates seriously in the sizing-up. This work aimed to probe the possibility of adding an inert gas phase to offset the adverse effect of microreactor sizing-up on the mass transfer between two immiscible liquid phases. Using a high-speed camera, four flow patterns were observed in three capillaries with their diameters ranging from 0.8 to 3.0 mm. Empirical equations were given to describe the flow-pattern transitions. The influencing mechanism of the capillary diameter on the liquid-liquid mass transfer was analyzed by taking the effect of adding the inert gas phase into account. Finally, the evaluation of the energy consumption suggested that adding an inert gas phase to agitate the flow could utilize the input energy more efficiently to intensify the liquid-liquid mass transfer in the microchannel with a larger hydrodynamic diameter. Therefore, the method of inert gas agitation is a meritorious assistive technology in the sizing-up of microreactors.
Keyword ：
Energy efficiency Energy efficiency Flow pattern Flow pattern Gas agitation Gas agitation Gas-liquid-liquid three phases Gas-liquid-liquid three phases Mass transfer Mass transfer Microreactor Microreactor Process intensification Process intensification Scale-up Scale-up
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| GB/T 7714 | Huang, Weihang , Ren, Xianggui , Xiao, Longzhen et al. Sizing-up effect on the flow pattern and mass transfer of gas-liquid-liquid three-phase flow in microchannels [J]. | EXPERIMENTAL THERMAL AND FLUID SCIENCE , 2024 , 159 . |
| MLA | Huang, Weihang et al. "Sizing-up effect on the flow pattern and mass transfer of gas-liquid-liquid three-phase flow in microchannels" . | EXPERIMENTAL THERMAL AND FLUID SCIENCE 159 (2024) . |
| APA | Huang, Weihang , Ren, Xianggui , Xiao, Longzhen , Zheng, Kunrong , Ge, Xue-hui , Wang, Xiaoda . Sizing-up effect on the flow pattern and mass transfer of gas-liquid-liquid three-phase flow in microchannels . | EXPERIMENTAL THERMAL AND FLUID SCIENCE , 2024 , 159 . |
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Abstract ：
Although it was experimentally verified the microchannels with periodic expansion structures can effectively intensify the mass transfer of the slug flow, little research has focused on their geometric design. Hereon, a numerical simulation is conducted to evaluate the impact of microchannel geometry on the mass transfer of slug flow. The square expansion unit performs better than the triangular and circular ones. With the increase of the length, width, and number of the expansion units, and the width of the constriction between the adjacent expansions, the mass transfer performance shows a non-monotonic variation, that is an initial increase followed by a decrease. The underlying reasons are analyzed by evaluating the mixing inside and outside the droplet and the effective mass transfer area. At the preliminarily optimized geometry, a novel mass transfer path, in which not only the droplet caps but also the droplet body becomes the effective mass transfer area, is observed.
Keyword ：
Mass transfer intensification Mass transfer intensification Numerical simulation Numerical simulation Periodic expansion microchannel Periodic expansion microchannel Slug flow Slug flow Structure design Structure design
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| GB/T 7714 | Han, Yang , Wang, Xiaoda , Yin, Yaran . Geometry effect on the mass transfer of slug flow in the microchannels with periodic expansion units [J]. | CHEMICAL ENGINEERING SCIENCE , 2024 , 299 . |
| MLA | Han, Yang et al. "Geometry effect on the mass transfer of slug flow in the microchannels with periodic expansion units" . | CHEMICAL ENGINEERING SCIENCE 299 (2024) . |
| APA | Han, Yang , Wang, Xiaoda , Yin, Yaran . Geometry effect on the mass transfer of slug flow in the microchannels with periodic expansion units . | CHEMICAL ENGINEERING SCIENCE , 2024 , 299 . |
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Abstract ：
High-purity ethylene carbonate (EC) is widely used as battery electrolyte, polycarbonate monomer, organic intermediate, and so on. An economical and sustainable route to synthesize high-purity ethylene carbonate (EC) via the transesterification of dimethyl carbonate (DMC) with ethylene glycol (EG) is pro-vided in this work. However, this reaction is so fast that the reaction kinetics, which is essential for the industrial design, is hard to get by the traditional measuring method. In this work, an easy-to-assemble microreactor was used to precisely determine the reaction kinetics for the fast transesterification of DMC with EG using sodium methoxide as catalyst. The effects of flow rate, microreactor diameter, catalyst con-centration, reaction temperature, and reactant molar ratio were investigated. An activity-based pseudo-homogeneous kinetic model, which considered the non-ideal properties of reaction system, was estab-lished to describe the transesterification of DMC with EG. Detailed kinetics data were collected in the first 5 min. Using these data, the parameters of the kinetic model were correlated with the maximum average error of 11.19%. Using this kinetic model, the kinetic data at different catalyst concentrations and reactant molar ratios were predicted with the maximum average error of 13.68%, suggesting its satisfactory pre-diction performance.(c) 2022 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights reserved.
Keyword ：
Ethylene carbonate synthesis Ethylene carbonate synthesis Kinetics Kinetics Microreactor Microreactor Sodium methoxide Sodium methoxide Transesterification Transesterification
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| GB/T 7714 | Wang, Tengjie , Li, Wenkai , Ge, Xuehui et al. Kinetics measurement of ethylene-carbonate synthesis via a fast transesterification by microreactors [J]. | CHINESE JOURNAL OF CHEMICAL ENGINEERING , 2023 , 53 : 243-250 . |
| MLA | Wang, Tengjie et al. "Kinetics measurement of ethylene-carbonate synthesis via a fast transesterification by microreactors" . | CHINESE JOURNAL OF CHEMICAL ENGINEERING 53 (2023) : 243-250 . |
| APA | Wang, Tengjie , Li, Wenkai , Ge, Xuehui , Qiu, Ting , Wang, Xiaoda . Kinetics measurement of ethylene-carbonate synthesis via a fast transesterification by microreactors . | CHINESE JOURNAL OF CHEMICAL ENGINEERING , 2023 , 53 , 243-250 . |
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Liquid-liquid slug flow has great application potential in many fields. The effective intensification of mass transfer is an important impetus for its wider application. However, it still lacks a method which can intensify its mass transfer at low flow-rate without slug breakup. Hereon, the periodic expansion microchannel is used to induce the interface deformation of the droplets in slug flow to strengthen mass transfer. Concentration field obtained by experimental analysis, and velocity field obtained through numerical simulation are used to investigate the influence of expansion structure on the mass transfer mechanism of liquid-liquid slug flow. The regulating mechanism of mass transfer is disclosed by investigating the effect of operating conditions on the volumetric mass transfer coefficient kLa and intensification factor E. Optimized E can reach up to 1.5. Introducing expansion structures could intensify the mass transfer of slug flow in a microchannel with low energy consumption.
Keyword ：
Interfacial deformation Interfacial deformation Mass transfer intensification Mass transfer intensification Microchannel Microchannel Periodic expansion Periodic expansion Slug flow Slug flow
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| GB/T 7714 | Han, Yang , Li, Hengbo , Fu, Taotao et al. Mass transfer intensification of slug flow by interfacial deformation at low flow rate in the microchannels with periodic expansion units [J]. | CHEMICAL ENGINEERING SCIENCE , 2023 , 275 . |
| MLA | Han, Yang et al. "Mass transfer intensification of slug flow by interfacial deformation at low flow rate in the microchannels with periodic expansion units" . | CHEMICAL ENGINEERING SCIENCE 275 (2023) . |
| APA | Han, Yang , Li, Hengbo , Fu, Taotao , Liu, Dayu , Wang, Xiaoda . Mass transfer intensification of slug flow by interfacial deformation at low flow rate in the microchannels with periodic expansion units . | CHEMICAL ENGINEERING SCIENCE , 2023 , 275 . |
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