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学者姓名：王晓达
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Abstract ：
人才培养是未来几年微化工技术发展过程中面临的主要问题之一.文章结合新工科教育的要求,探讨微化工技术教学的意义,并介绍开展微化工技术课程教学的经验.文章从技术本身的先进性、行业需求和教学现状等角度讨论了开展微化工技术教学的重要性和必要性,提出"建立知识框架—案例教学—翻转课堂"的教学思路,并详细介绍了教学过程.这些经验将为新工科背景下微化工技术人才的培养提供参考.
Keyword ：
微化工技术 微化工技术 新工科教育 新工科教育 案例教学 案例教学 翻转课堂 翻转课堂
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| GB/T 7714 | 王晓达 , 葛雪惠 , 张孟佳 et al. 新工科背景下微化工技术教学初探 [J]. | 化工高等教育 , 2025 , 42 (2) : 8-12,47 . |
| MLA | 王晓达 et al. "新工科背景下微化工技术教学初探" . | 化工高等教育 42 . 2 (2025) : 8-12,47 . |
| APA | 王晓达 , 葛雪惠 , 张孟佳 , 蔡国辉 , 李玲 . 新工科背景下微化工技术教学初探 . | 化工高等教育 , 2025 , 42 (2) , 8-12,47 . |
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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 , 7 (8) : 5259-5270 . |
| 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 7 . 8 (2025) : 5259-5270 . |
| 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 , 7 (8) , 5259-5270 . |
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The coalescence of two droplets with unequal lengths through a head-to-rear collision in the microchannel with a double T-junction is an important passive method to construct droplet reactors. However, the accurate prediction of the coalescence position is still not achievable. This work aimed to explore the coalescence position by analyzing the droplet dynamics. Firstly, the velocity variation of the paired droplets moving in a straight microchannel was analyzed to divide the whole process into several stages. Then, based on the experimental investigations, mathematical models were developed to describe the distances of the droplet-pairs moving in each stage to predict the coalescence position in the straight microchannel. In addition, the coalescence position, as well as the coalescence mechanism, was analyzed for the paired droplets in an expansion microchannel to explore the more possibilities of intensifying the construction of droplet reactors in microchannels.
Keyword ：
Coalescence position Coalescence position Droplet alternating generation Droplet alternating generation Droplet coalescence Droplet coalescence Microchannel Microchannel Microfluidic double T -junction Microfluidic double T -junction Slug flow Slug flow
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| GB/T 7714 | Dong, Wei , Zhao, Yuqing , Tang, Lei et al. Coalescence position of two confined droplets with unequal lengths in microchannels [J]. | EXPERIMENTAL THERMAL AND FLUID SCIENCE , 2025 , 163 . |
| MLA | Dong, Wei et al. "Coalescence position of two confined droplets with unequal lengths in microchannels" . | EXPERIMENTAL THERMAL AND FLUID SCIENCE 163 (2025) . |
| APA | Dong, Wei , Zhao, Yuqing , Tang, Lei , Xie, Liangkang , Wang, Xiaoda , Du, Wei . Coalescence position of two confined droplets with unequal lengths in microchannels . | EXPERIMENTAL THERMAL AND FLUID SCIENCE , 2025 , 163 . |
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The one-to-one alternating droplet generation (OOAG) in a double microfluidic T-junction is a newly-developing method to construct droplet reactors. However, little attention was paid to its precise control, especially at low interfacial tension. This work filled in the gap through the experimental and theoretical exploration. Four fluid systems were adopted to make the research conclusions more general. The mechanism of flow-patten transition was analyzed to establish a predictive model describing the operation window of OOAG. Interface dynamics analysis suggested that independent of the proportion of continuous-phase, the droplet formation was suppressed and accelerated by the opposite dispersed phase at the earlier and later stages, respectively. Additionally, the opposite dispersed phase delayed the droplet breakup at low proportion of continuous phase through the interface deformation. A predictive model for droplet size was established by considering the mutual effect of the two dispersed phases and the fluid properties.
Keyword ：
Double T-junction Double T-junction Flow pattern Flow pattern Generation mechanism Generation mechanism Microchannel Microchannel Size prediction Size prediction
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| GB/T 7714 | Jia, Huanhuan , Liu, Yan , Zhao, Yuqing et al. One-to-one alternating droplet generation in a microfluidic double T-junction at low interfacial tension [J]. | INTERNATIONAL JOURNAL OF MULTIPHASE FLOW , 2025 , 189 . |
| MLA | Jia, Huanhuan et al. "One-to-one alternating droplet generation in a microfluidic double T-junction at low interfacial tension" . | INTERNATIONAL JOURNAL OF MULTIPHASE FLOW 189 (2025) . |
| APA | Jia, Huanhuan , Liu, Yan , Zhao, Yuqing , Wang, Xiaoda , Yu, Xiaoxi . One-to-one alternating droplet generation in a microfluidic double T-junction at low interfacial tension . | INTERNATIONAL JOURNAL OF MULTIPHASE FLOW , 2025 , 189 . |
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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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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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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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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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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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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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