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

J. Israel Martínez-López, Héctor Andrés Betancourt Cervantes, Luis Donaldo Cuevas Iturbe, Elisa Vázquez, Edisson A. Naula, Alejandro Martínez López, Héctor R. Siller, Christian Mendoza-Buenrostro, Ciro A. Rodríguez
2020 Micromachines  
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
more » ... < 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.
doi:10.3390/mi11110970 pmid:33138263 fatcat:6tzpijda5rb2lmql4z6kw4cati