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Micromachines 2018, 9(3), 115; https://doi.org/10.3390/mi9030115

Highly Fluorinated Methacrylates for Optical 3D Printing of Microfluidic Devices

Institute of Microstructure Technology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
Contributed equally to this work.
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Received: 31 January 2018 / Revised: 27 February 2018 / Accepted: 7 March 2018 / Published: 8 March 2018
(This article belongs to the Special Issue 3D Printed Microfluidic Devices)
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Abstract

Highly fluorinated perfluoropolyether (PFPE) methacrylates are of great interest for transparent and chemically resistant microfluidic chips. However, so far only a few examples of material formulations for three-dimensional (3D) printing of these polymers have been demonstrated. In this paper we show that microfluidic chips can be printed using these highly fluorinated polymers by 3D stereolithography printing. We developed photocurable resin formulations that can be printed in commercial benchtop stereolithography printers. We demonstrate that the developed formulations can be printed with minimal cross-sectional area of 600 µm for monolithic embedded microfluidic channels and 200 µm for open structures. The printed and polymerized PFPE methacrylates show a good transmittance above 70% at wavelengths between 520–900 nm and a high chemical resistance when being exposed to organic solvents. Microfluidic mixers were printed to demonstrate the great variability of different designs that can be printed using stereolithography. View Full-Text
Keywords: 3D printing; perfluoropolyether; additive manufacturing; microfluidics; stereolithography 3D printing; perfluoropolyether; additive manufacturing; microfluidics; stereolithography
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Kotz, F.; Risch, P.; Helmer, D.; Rapp, B.E. Highly Fluorinated Methacrylates for Optical 3D Printing of Microfluidic Devices. Micromachines 2018, 9, 115.

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