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学者姓名：王晓达
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Abstract ：
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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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 (02) : 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 . 02 (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 (02) , 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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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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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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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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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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Cylcohexanol is an essential bulk chemical that can be produced via cyclohexene hydration, a liquidliquid two-phase reaction that is limited by the low reaction rate and the equilibrium conversion. Adding an appropriate solvent is the most promising method to break through these limitations. However, in previous works the solvent was almost blindly selected without a global consideration. In this work, a rational multiscale method is proposed for the effective selection of an economical and sustainable solvent for the direct hydration of cyclohexene. At the molecular scale, liquid-liquid phase equilibrium was estimated using group contribution methods to rapidly screen the potential solvent candidates from a range of organics, based on the partition coefficient. At the reactor scale, the candidates were experimentally investigated to pick out the solvents that could significantly improve the conversion, without introducing side reactions or deactivating the catalyst. At the process scale, the total annual cost (TAC), CO2 emission, and other metrics were calculated to evaluate the eco-efficiency of all solvents. Using this multi-scale method, acetophenone was selected as an eco-efficient solvent from over 100 organics, resulting in the reduction of TAC by 8 % and CO2 emission by 17 % in the production process. Using acetophenone also led to the increase of cyclohexanol yield from 12.3 % to 27.6 % without the occurrence of side reactions and catalyst deactivation. & COPY; 2023 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Keyword ：
Cyclohexene Cyclohexene Hydration Hydration Multi -scale Multi -scale Process analysis Process analysis Solvent selection Solvent selection
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| GB/T 7714 | Wang, Xiaoda , Zhao, Yuqing , Han, Lumin et al. The quest for a better solvent for the direct hydration of cyclohexene: From molecular screening to process design [J]. | CHEMICAL ENGINEERING SCIENCE , 2023 , 274 . |
| MLA | Wang, Xiaoda et al. "The quest for a better solvent for the direct hydration of cyclohexene: From molecular screening to process design" . | CHEMICAL ENGINEERING SCIENCE 274 (2023) . |
| APA | Wang, Xiaoda , Zhao, Yuqing , Han, Lumin , Li, Ling , Kiss, Anton A. . The quest for a better solvent for the direct hydration of cyclohexene: From molecular screening to process design . | CHEMICAL ENGINEERING SCIENCE , 2023 , 274 . |
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本发明提供了一种反应精馏法联产碳酸乙烯酯和甲醇的工艺。包括催化剂、乙二醇、碳酸二甲酯连续输送到反应精馏塔进行反应精馏；催化剂通过蒸发器蒸馏从产物溶液中分离回收；利用精馏塔分离产物，塔顶和塔底分别采出产品甲醇与碳酸乙烯酯粗产品；碳酸乙烯酯粗产品利用碳酸乙烯酯精制塔提纯从塔釜采出。本发明具有碳酸二甲酯转化率高(可达99.00%以上)、原料利用率高、工艺过程简单、设备投资成本低等优点，可实现甲醇和高纯碳酸乙烯酯的连续生产。
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| GB/T 7714 | 邱挺 , 王腾杰 , 王晓达 et al. 一种反应精馏联产甲醇和碳酸乙烯酯的工艺 : CN202210154967.X[P]. | 2022-02-21 00:00:00 . |
| MLA | 邱挺 et al. "一种反应精馏联产甲醇和碳酸乙烯酯的工艺" : CN202210154967.X. | 2022-02-21 00:00:00 . |
| APA | 邱挺 , 王腾杰 , 王晓达 , 王红星 , 黄智贤 . 一种反应精馏联产甲醇和碳酸乙烯酯的工艺 : CN202210154967.X. | 2022-02-21 00:00:00 . |
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本发明公开了一种串联孔喉微通道在高相比下强化萃取稀土钕离子的方法，属于湿法冶金技术领域。首先将P507加入磺化煤油得到有机相，将稀土盐溶液作为水相，将有机相与水相按照相比1 : 20~1 : 200，以1005~1050μL/min的体积流量经过微通道进行常温萃取，最终获得稀土元素萃取相和萃余相。本发明利用所设计的微通道比表面积高、传质速率快等优点，在高相比(>10 : 1)下进行萃取实验，通过串联孔喉微通道优异的传质性能实现高效萃取稀土钕的目标，是一种安全、高效、低耗的方法。
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| GB/T 7714 | 葛雪惠 , 黄晓连 , 王晓达 et al. 一种利用串联孔喉微通道在高相比下强化稀土钕离子萃取的方法 : CN202210231205.5[P]. | 2022-03-10 00:00:00 . |
| MLA | 葛雪惠 et al. "一种利用串联孔喉微通道在高相比下强化稀土钕离子萃取的方法" : CN202210231205.5. | 2022-03-10 00:00:00 . |
| APA | 葛雪惠 , 黄晓连 , 王晓达 , 杨臣 , 邱挺 . 一种利用串联孔喉微通道在高相比下强化稀土钕离子萃取的方法 : CN202210231205.5. | 2022-03-10 00:00:00 . |
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