Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 9, Issue 45, Pages 39708-39716Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b13909
Keywords
3D printing; elastomeric; flexible; stereolithography; digital light processing
Funding
- University of Washington College of Engineering Strategic Research Initiative
- Washington Research Foundation
- Research Corporation for Science Advancement
- Camille and Henry Dreyfus Foundation
- National Science Foundation [DMR-1452726]
- Army Research Office [W911NF-15-10139]
- Air Force Institute of Technology
- National Science Foundation Graduate Research Fellowship Program [DGE-1256082]
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A series of photoresins suitable for the production of elastomeric objects via digital light processing additive manufacturing are reported. Notably, the printing procedure is readily accessible using only entry-level equipment under ambient conditions using visible light projection. The photoresin formulations were found to be modular in nature, and straightforward adjustments to the resin components enabled access to a range of compositions and mechanical properties. Collectively, the series includes silicones, hydrogels, and hybrids thereof. Printed test specimens displayed maximum elongations of up to 472% under tensile load, a tunable swelling behavior in water, and Shore A hardness values from 13.7 to 33.3. A combination of the resins was used to print a functional multimaterial three-armed pneumatic gripper. These photoresins could be transformative to advanced prototyping applications such as simulated human tissues, stimuli-responsive materials, wearable devices, and soft robotics.
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