Desktop-Stereolithography 3D-Printing of a Poly(dimethylsiloxane)-Based Material with Sylgard-184 Properties.
Desktop-Stereolithography 3D-Printing of a Poly(dimethylsiloxane)-Based Material with Sylgard-184 Properties.
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DOI：
10.1002/adma.201800001
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发表时间：
2018-05
期刊：
影响因子：
--
通讯作者：
Folch A
中科院分区：
文献类型：
--
作者：
Bhattacharjee N;Parra-Cabrera C;Kim YT;Kuo AP;Folch A
The advantageous physiochemical properties of poly(dimethylsiloxane) (PDMS) have made it an extremely useful material for prototyping in various technological, scientific, and clinical areas. However, PDMS molding is a manual procedure and requires tedious assembly steps, especially for three-dimensional (3D) designs, thereby limiting its access and usability. On the other hand, automated digital manufacturing processes such as stereolithography (SL) enable true 3D design and fabrication. Here we report the formulation, characterization and SL application of a 3D-printable PDMS resin (3DP-PDMS) based on commercially available PDMS-methacrylate macromers, a high-efficiency photoinitiator and a high-absorbance photosensitizer. Using a desktop SL-printer, we demonstrate optically transparent sub-millimeter structures and microfluidic channels. We also used an optimized blend of PDMS-methacrylate macromers to SL-print structures with mechanical properties similar to conventional thermally cured PDMS (Sylgard-184). Furthermore, we show that SL-printed 3DP-PDMS substrates can be rendered suitable for mammalian cell culture. The 3DP-PDMS resin enables assembly-free, automated, digital manufacturing of PDMS, which should facilitate the prototyping of devices for microfluidics, organ-on-chip platforms, soft robotics, flexible electronics and sensors, among others. A PDMS-based stereolithography resin for 3D-printing transparent, flexible, biocompatible, high resolution elastomeric structures with mechanical properties similar to Sylgard-184 PDMS is reported. A 3D-printed microfluidic device showing a heterogeneous laminar flow is demonstrated. The resin is formulated for use with affordable desktop stereolithography printers so that rapid prototyping and digital manufacturing of microdevices can become more accessible.
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