Abstract
This study evaluated the structural and skin penetration properties of solid microneedle arrays made by digital light processing-based 3D printing of polytetrafluoroethylene. Confocal laser scanning microscopy and scanning electron microscopy revealed that the microneedles exhibited uniform heights. Raman spectroscopy, X-ray photoelectron spectroscopy, nanoindentation, and contact angle results indicated that the composition, carbon–fluorine bonding, reduced elastic modulus, and contact angle values of the 3D-printed polytetrafluoroethylene corresponded with those of bulk polytetrafluoroethylene, respectively. Methyl blue was used to evaluate the human skin penetration functionality of the microneedle array. Our results indicate that digital light processing is appropriate for manufacturing polytetrafluoroethylene medical devices.
Graphical abstract
Data availability
The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Acknowledgments
The authors would like to acknowledge the assistance of Bob Fidler and Paul Simutis with DataPhysics Instruments USA Corp. for their assistance with optical contact angle measurements and data interpretation. Funding was provided through the "Cares Act" with programmatic oversight from the Medical Research and Development Command, Military Infectious Diseases Research Program. Support from MTEC is also acknowledged; MTEC is a 501(c)(3) biomedical technology consortium collaborating with multiple government agencies under a 10-year renewable Other Transactional Agreement with the U.S. Army Medical Research and Development Command. MTEC is managed by Advanced Technology International.
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Sachan, R., Nguyen, A.K., Lu, J. et al. Digital light processing-based 3D printing of polytetrafluoroethylene solid microneedle arrays. MRS Communications 11, 896–901 (2021). https://doi.org/10.1557/s43579-021-00121-0
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DOI: https://doi.org/10.1557/s43579-021-00121-0