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Huang S, Wu Y, Wang Y, Hu X, Song K. An embedded obstacle type micromixer-concentration gradient generator based on capillary driven. Electrophoresis 2024; 45:420-432. [PMID: 37915122 DOI: 10.1002/elps.202300164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 10/14/2023] [Accepted: 10/22/2023] [Indexed: 11/03/2023]
Abstract
An embedded obstacle-type micromixer-concentration gradient generator based on capillary self-driven is proposed and studied. Herringbone structure (HS) for mixing and palisade-shape small channels at the outlet are designed in the device (named HS). Simulation and experimentation are done to study the liquid mixing efficiency in the small channels and concentration gradient at the outlet, and the experimental results agree with the simulation results. For three cases of liquid dripping (sequential, reverse, and delayed drippings), mixing analysis shows that the mixing efficiency increases along both mixing channel and palisade length, and is high in the middle small channel of the palisade-shape area and low on both sides. An obvious concentration gradient at the outlet can form compared with the device without the palisade-shape area. Finally, water pH value detection is done as one of the applications of HS. This study can provide guidance for the application of HS in biochemical detection, cell research, drug screening, etc. based on the capillary-driven effect.
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Affiliation(s)
- Sisi Huang
- School of Mechanical Engineering and Mechanics, Xiangtan University, Xiangtan, P. R. China
| | - Yihao Wu
- School of Mechanical Engineering and Mechanics, Xiangtan University, Xiangtan, P. R. China
| | - Yifan Wang
- School of Mechanical Engineering and Mechanics, Xiangtan University, Xiangtan, P. R. China
| | - Xiaoling Hu
- School of Mechanical Engineering and Mechanics, Xiangtan University, Xiangtan, P. R. China
- Institute of Rheological Mechanics, Xiangtan University, Xiangtan, P. R. China
| | - Kui Song
- School of Mechanical Engineering and Mechanics, Xiangtan University, Xiangtan, P. R. China
- Institute of Rheological Mechanics, Xiangtan University, Xiangtan, P. R. China
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Zheng Y, Liu Y, Tang C, Liu B, Zou H, Li W, Zhang H. Mixing Performance Analysis and Optimal Design of a Novel Passive Baffle Micromixer. MICROMACHINES 2024; 15:182. [PMID: 38398912 PMCID: PMC10893328 DOI: 10.3390/mi15020182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Revised: 01/21/2024] [Accepted: 01/22/2024] [Indexed: 02/25/2024]
Abstract
Micromixers, as crucial components of microfluidic devices, find widespread applications in the field of biochemistry. Due to the laminar flow in microchannels, mixing is challenging, and it significantly impacts the efficiency of rapid reactions. In this study, numerical simulations of four baffle micromixer structures were carried out at different Reynolds numbers (Re = 0.1, Re = 1, Re = 10, and Re = 100) in order to investigate the flow characteristics and mixing mechanism under different structures and optimize the micromixer by varying the vertical displacement of the baffle, the rotation angle, the horizontal spacing, and the number of baffle, and by taking into account the mixing intensity and pressure drop. The results indicated that the optimal mixing efficiency was achieved when the baffle's vertical displacement was 90 μm, the baffle angle was 60°, the horizontal spacing was 130 μm, and there were 20 sets of baffles. At Re = 0.1, the mixing efficiency reached 99.4%, and, as Re increased, the mixing efficiency showed a trend of, first, decreasing and then increasing. At Re = 100, the mixing efficiency was 97.2%. Through simulation analysis of the mixing process, the structure of the baffle-type micromixer was effectively improved, contributing to enhanced fluid mixing efficiency and reaction speed.
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Affiliation(s)
- Yiwen Zheng
- Marine Engineering College, Dalian Maritime University, Dalian 116026, China; (Y.Z.); (Y.L.); (C.T.); (B.L.); (H.Z.); (W.L.)
- State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, China
| | - Yu Liu
- Marine Engineering College, Dalian Maritime University, Dalian 116026, China; (Y.Z.); (Y.L.); (C.T.); (B.L.); (H.Z.); (W.L.)
- State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, China
| | - Chaojun Tang
- Marine Engineering College, Dalian Maritime University, Dalian 116026, China; (Y.Z.); (Y.L.); (C.T.); (B.L.); (H.Z.); (W.L.)
- State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, China
| | - Bo Liu
- Marine Engineering College, Dalian Maritime University, Dalian 116026, China; (Y.Z.); (Y.L.); (C.T.); (B.L.); (H.Z.); (W.L.)
- State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, China
| | - Hongyuan Zou
- Marine Engineering College, Dalian Maritime University, Dalian 116026, China; (Y.Z.); (Y.L.); (C.T.); (B.L.); (H.Z.); (W.L.)
- State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, China
| | - Wei Li
- Marine Engineering College, Dalian Maritime University, Dalian 116026, China; (Y.Z.); (Y.L.); (C.T.); (B.L.); (H.Z.); (W.L.)
- State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, China
| | - Hongpeng Zhang
- Marine Engineering College, Dalian Maritime University, Dalian 116026, China; (Y.Z.); (Y.L.); (C.T.); (B.L.); (H.Z.); (W.L.)
- State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, China
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Harriot J, Yeh M, Pabba M, DeVoe DL. Programmable Control of Nanoliter Droplet Arrays using Membrane Displacement Traps. ADVANCED MATERIALS TECHNOLOGIES 2023; 8:2300963. [PMID: 38495529 PMCID: PMC10939115 DOI: 10.1002/admt.202300963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Indexed: 03/19/2024]
Abstract
A unique droplet microfluidic technology enabling programmable deterministic control over complex droplet operations is presented. The platform provides software control over user-defined combinations of droplet generation, capture, ejection, sorting, splitting, and merging sequences to enable the design of flexible assays employing nanoliter-scale fluid volumes. The system integrates a computer vision system with an array of membrane displacement traps capable of performing selected unit operations with automated feedback control. Sequences of individual droplet handling steps are defined through a robust Python-based scripting language. Bidirectional flow control within the microfluidic chips is provided using an H-bridge channel topology, allowing droplets to be transported to arbitrary trap locations within the array for increased operational flexibility. By enabling automated software control over all droplet operations, the system significantly expands the potential of droplet microfluidics for diverse biological and biochemical applications by combining the functionality of robotic liquid handling with the advantages of droplet-based fluid manipulation.
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Affiliation(s)
- Jason Harriot
- Department of Mechanical Engineering, University of Maryland, College Park, MD 20742
- Fishell Institute for Biomedical Devices, University of Maryland, College Park, MD 20742
| | - Michael Yeh
- Department of Mechanical Engineering, University of Maryland, College Park, MD 20742
- Fishell Institute for Biomedical Devices, University of Maryland, College Park, MD 20742
| | - Mani Pabba
- Department of Computer Science, University of Maryland, College Park, MD 20742
| | - Don L. DeVoe
- Department of Mechanical Engineering, University of Maryland, College Park, MD 20742
- Fishell Institute for Biomedical Devices, University of Maryland, College Park, MD 20742
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Modeling-based design specifications for microfluidic gradients generators for biomedical applications. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Rho HS, Yang Y, Terstappen LW, Gardeniers H, Le Gac S, Habibović P. Programmable droplet-based microfluidic serial dilutor. J IND ENG CHEM 2020. [DOI: 10.1016/j.jiec.2020.08.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Liu S, Li Z, Yu B, Wang S, Shen Y, Cong H. Recent advances on protein separation and purification methods. Adv Colloid Interface Sci 2020; 284:102254. [PMID: 32942182 DOI: 10.1016/j.cis.2020.102254] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 09/01/2020] [Accepted: 09/01/2020] [Indexed: 12/21/2022]
Abstract
Protein, as the material basis of vita, is the crucial undertaker of life activities, which constitutes the framework and main substance of human tissues and organs, and takes part in various forms of life activities in organisms. Separating proteins from biomaterials and studying their structures and functions are of great significance for understanding the law of life activities and clarifying the essence of life phenomena. Therefore, scientists have proposed the new concept of proteomics, in which protein separation technology plays a momentous role. It has been diffusely used in the food industry, agricultural biological research, drug development, disease mechanism, plant stress mechanism, and marine environment research. In this paper, combined with the recent research situation, the progress of protein separation technology was reviewed from the aspects of extraction, precipitation, membrane separation, chromatography, electrophoresis, molecular imprinting, microfluidic chip and so on.
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Roque ACA, Pina AS, Azevedo AM, Aires‐Barros R, Jungbauer A, Di Profio G, Heng JYY, Haigh J, Ottens M. Anything but Conventional Chromatography Approaches in Bioseparation. Biotechnol J 2020; 15:e1900274. [DOI: 10.1002/biot.201900274] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 04/03/2020] [Indexed: 12/28/2022]
Affiliation(s)
| | - Ana Sofia Pina
- UCIBIOChemistry DepartmentNOVA School of Science and Technology Caparica 2829‐516 Portugal
| | - Ana Margarida Azevedo
- IBB – Institute for Bioengineering and BiosciencesDepartment of BioengineeringInstituto Superior TécnicoUniversidade de Lisboa Av. Rovisco Pais Lisbon 1049‐001 Portugal
| | - Raquel Aires‐Barros
- IBB – Institute for Bioengineering and BiosciencesDepartment of BioengineeringInstituto Superior TécnicoUniversidade de Lisboa Av. Rovisco Pais Lisbon 1049‐001 Portugal
| | - Alois Jungbauer
- Department of BiotechnologyUniversity of Natural Resources and Life Sciences Muthgasse 18 Vienna Muthgasse 1190 Austria
| | - Gianluca Di Profio
- National Research Council of Italy (CNR) – Institute on Membrane Technology (ITM) via P. Bucci Cubo 17/C Rende (CS) 87036 Italy
| | - Jerry Y. Y. Heng
- Department of Chemical EngineeringImperial College London South Kensington Campus London SW7 2AZ UK
| | - Jonathan Haigh
- FUJIFILM Diosynth Biotechnologies UK Limited Belasis Avenue Billingham TS23 1LH UK
| | - Marcel Ottens
- Department of BiotechnologyDelft University of Technology Van der Maasweg 9 Delft 2629 HZ The Netherlands
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