3D Printing of Polytetrafluoroethylene Hollow Needles for Medical Applications

Sachan, Roger; Sachan, Andrew; Lu, Junqi; Erdmann, Detlev; Zhang, Jennifer; Narayan, Roger J.

doi:10.1007/s11837-021-04978-3

Cited by 3 publications

(2 citation statements)

References 30 publications

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“…In the medical field, its unique properties make it suitable for stents and grafts [35], implant tubes [36], and medical device applications [37]. Three-dimensional printing has also been applied for the development of parts for the aforementioned applications, but it focused mainly on microstructures [38], needles [39,40], nanogenerators [41,42], hydrophobic surfaces, and devices [43]. To date, the usage of PTFE NPs as an additive for maintaining the mechanical improvement of 3D-printed objects composed of PLA and PA12 thermoplastic polymers, as well as the thermomechanical and fracture qualities of the 3DP samples, have not yet been studied.…”

Section: Introductionmentioning

confidence: 99%

Nanocomposites with Optimized Polytetrafluoroethylene Content as a Reinforcement Agent in PA12 and PLA for Material Extrusion Additive Manufacturing

Vidakis,

Petousis,

Moutsopoulou

et al. 2023

Polymers

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Herein, polytetrafluoroethylene (PTFE) is evaluated as a reinforcement agent in material extrusion (MEX) additive manufacturing (AM), aiming to develop nanocomposites with enhanced mechanical performance. Loadings up to 4.0 wt.% were introduced as fillers of polylactic acid (PLA) and polyamide 12 (PA12) matrices. Filaments for MEX AM were prepared to produce corresponding 3D-printed samples. For the thorough characterization of the nanocomposites, a series of standardized mechanical tests were followed, along with AFM, TGA, Raman spectroscopy, EDS, and SEM analyses. The results showed an improved mechanical response for filler concentrations between 2.0 and 3.0 wt.%. The enhancement for the PLA/PTFE 2.0 wt.% in the tensile strength reached 21.1% and the modulus of elasticity 25.5%; for the PA12/PTFE 3.0 wt.%, 34.1%, and 41.7%, respectively. For PLA/PTFE 2.0 wt.%, the enhancement in the flexural strength reached 57.6% and the modulus of elasticity 25.5%; for the PA12/PTFE 3.0 wt.%, 14.7%, and 17.2%, respectively. This research enables the ability to deploy PTFE as a reinforcement agent in the PA12 and PLA thermoplastic engineering polymers in the MEX AM process, expanding the potential applications.

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Section: Introductionmentioning

confidence: 99%

Nanocomposites with Optimized Polytetrafluoroethylene Content as a Reinforcement Agent in PA12 and PLA for Material Extrusion Additive Manufacturing

Vidakis,

Petousis,

Moutsopoulou

et al. 2023

Polymers

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“…(a) Manufacturing a series of NAM appliances by 3DP. 44 (b) Confocal laser scanning micrograph of a three-by-one poly(tetrafl uoroethylene) needle array in the planar orientation 51. (c) 5 mm-thick, 3D printed small tablet with a diameter of 15 mm, coaxial annulus tablet with an outer diameter of 15 mm and inner diameter of 10 mm, large tablet with a diameter of 20 mm, 4-circle pattern tablet with diameter of 20 mm and 4 circular holes of 4 mm in diameter, and honeycomb pattern tablet with a diameter of 20 mm and hexagonal holes with inner diameter of 4 mm 54.…”

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confidence: 99%

Translation of 3D printed materials for medical applications

2022

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During the past 30 years, 3D printing (3DP) technologies significantly influenced the manufacturing world, including innovation in biomedical devices. This special issue reviews recent advances in translating 3DP biomaterials and medical devices for metallic, ceramic, and polymeric devices, as well as bioprinting for organ and tissue engineering, along with regulatory issues in 3DP biomaterials. In our introductory article, besides introducing selected 3DP processes for biomaterials, current challenges and growth opportunities are also discussed. Finally, it highlights a few success stories for the 3D printed biomaterials for medical devices. We hope these articles will educate engineers, scientists, and clinicians about recent developments in translational 3DP technologies .

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