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      Characterization of Soft Tooling Photopolymers and Processes for Micromixing Devices with Variable Cross-Section

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          Abstract

          In this paper, we characterized an assortment of photopolymers and stereolithography processes to produce 3D-printed molds and polydimethylsiloxane (PDMS) castings of micromixing devices. Once materials and processes were screened, the validation of the soft tooling approach in microfluidic devices was carried out through a case study. An asymmetric split-and-recombine device with different cross-sections was manufactured and tested under different regime conditions (10 < Re < 70). Mixing performances between 3% and 96% were obtained depending on the flow regime and the pitch-to-depth ratio. The study shows that 3D-printed soft tooling can provide other benefits such as multiple cross-sections and other potential layouts on a single mold.

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          Most cited references 51

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          Objective comparison of particle tracking methods

          The first community competition designed to objectively compare the performance of particle tracking algorithms provides valuable practical information for both users and developers. Supplementary information The online version of this article (doi:10.1038/nmeth.2808) contains supplementary material, which is available to authorized users.
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            3D printed microfluidic devices: enablers and barriers.

            3D printing has the potential to significantly change the field of microfluidics. The ability to fabricate a complete microfluidic device in a single step from a computer model has obvious attractions, but it is the ability to create truly three dimensional structures that will provide new microfluidic capability that is challenging, if not impossible to make with existing approaches. This critical review covers the current state of 3D printing for microfluidics, focusing on the four most frequently used printing approaches: inkjet (i3DP), stereolithography (SLA), two photon polymerisation (2PP) and extrusion printing (focusing on fused deposition modeling). It discusses current achievements and limitations, and opportunities for advancement to reach 3D printing's full potential.
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              RAPID MANUFACTURING AND RAPID TOOLING WITH LAYER MANUFACTURING (LM) TECHNOLOGIES, STATE OF THE ART AND FUTURE PERSPECTIVES

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                Author and article information

                Journal
                Micromachines (Basel)
                Micromachines (Basel)
                micromachines
                Micromachines
                MDPI
                2072-666X
                29 October 2020
                November 2020
                : 11
                : 11
                Affiliations
                [1 ]Tecnologico de Monterrey, Escuela de Ingeniería y Ciencias, Monterrey 64849, Mexico; habc-8@ 123456hotmail.com (H.A.B.C.); A00831116@ 123456itesm.mx (L.D.C.I.); elisa.vazquez@ 123456tec.mx (E.V.); A00825462@ 123456itesm.mx (E.A.N.); christian.mendoza@ 123456tec.mx (C.M.-B.)
                [2 ]Laboratorio Nacional de Manufactura Aditiva y Digital (MADiT), Apodaca, Nuevo Leon 66629, Mexico
                [3 ]Centro de Investigación Numericalc, 5 de mayo Oriente 912, Monterrey 64000, Mexico; alex@ 123456numericalc.org
                [4 ]Department of Mechanical Engineering, University of North Texas, 3940 N. Elm. St., Denton, TX 76207, USA; Hector.Siller@ 123456unt.edu
                Author notes
                [* ]Correspondence: israel.mtz@ 123456tec.mx (J.I.M.-L.); ciro.rodriguez@ 123456tec.mx (C.A.R.); Tel.: +52-81-8358-2000 (J.I.M.-L.)
                Article
                micromachines-11-00970
                10.3390/mi11110970
                7692576
                33138263
                © 2020 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

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