Characterization of the effect of in-process annealing using a novel print head assembly on the ultimate tensile strength &amp; toughness of Fused Filament Fabrication (FFF) parts

Patel, Parimal; Rane, Rhugdhrivya; Mrinal, Manjarik; Ganesan, Vishnu; Taylor, Robert M.; Jain, Ankur

doi:10.1080/17452759.2022.2095288

Cited by 7 publications

(3 citation statements)

References 35 publications

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“…The file is ready to be imported into the slicing software. Slicing software creates stepby-step or line-by-line instructions to create the final print on a 3D printer [24]. Many VP printers come with licensed software that guide the user with steps including the addition of support structures to ensure successful 3D printing as shown in Figure 5A.…”

Section: File Preparationmentioning

confidence: 99%

Medical 3D Printing Using Desktop Inverted Vat Photopolymerization: Background, Clinical Applications, and Challenges

et al. 2023

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Medical 3D printing is a complex, highly interdisciplinary, and revolutionary technology that is positively transforming the care of patients. The technology is being increasingly adopted at the Point of Care (PoC) as a consequence of the strong value offered to medical practitioners. One of the key technologies within the medical 3D printing portfolio enabling this transition is desktop inverted Vat Photopolymerization (VP) owing to its accessibility, high quality, and versatility of materials. Several reports in the peer-reviewed literature have detailed the medical impact of 3D printing technologies as a whole. This review focuses on the multitude of clinical applications of desktop inverted VP 3D printing which have grown substantially in the last decade. The principles, advantages, and challenges of this technology are reviewed from a medical standpoint. This review serves as a primer for the continually growing exciting applications of desktop-inverted VP 3D printing in healthcare.

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Section: File Preparationmentioning

confidence: 99%

Medical 3D Printing Using Desktop Inverted Vat Photopolymerization: Background, Clinical Applications, and Challenges

et al. 2023

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“…Thermal annealing has also been used to promote interlayer adhesion by holding the printed specimen in a mold at temperatures above the glass transition temperature (T g ), allowing reptation to occur, but the requirement of a mold to maintain specimen geometry defeats the spirit of 3DP to freeform objects. 5,19 Another approach is to employ covalent adaptable networks (CANs), which utilize dynamic covalent bonds to construct polymer networks. 20,21 When exposed to a stimulus like heat, covalent bonds begin to exchange, enabling the material to flow and behave like a traditional thermoplastic.…”

Section: ■ Introductionmentioning

confidence: 99%

“…In their best treatment conditions, 50 kGy of radiation while holding the specimen at 60 °C, the D a was reduced to 28 ± 34.4%, inadvertently reducing the (re)processability of the material due to the static cross-links. Thermal annealing has also been used to promote interlayer adhesion by holding the printed specimen in a mold at temperatures above the glass transition temperature ( T g ), allowing reptation to occur, but the requirement of a mold to maintain specimen geometry defeats the spirit of 3DP to freeform objects. , …”

Section: Introductionmentioning

confidence: 99%

Plasticization of a Diels–Alder Covalent Adaptable Network for Fused Filament Fabrication

Bischoff,

Mackay

2024

ACS Appl. Polym. Mater.

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Fused filament fabrication (FFF) is a 3D printing technique used to manufacture thermoplastic objects that offers users nearly unlimited design freedom compared with traditional subtractive and formative methodologies. The most significant barriers prohibiting its more widespread adoption are the reduced mechanical properties compared to injection or compressionmolded counterparts and the large degree of mechanical anisotropy due to the layer-by-layer additive process, where strength between layers is developed through the reptation and entanglement of polymer chains. Herein, a highly cross-linked covalent adaptable network (CAN) based on the Diels−Alder reaction between furan and maleimide functionalities is blended with flexible and tough polycaprolactone (PCL) to afford a dynamic semi-interpenetrating polymer network (semi-IPN) that can be spooled for use on an unmodified, commercially available desktop FFF 3D printer. By leveraging the thermoreversible nature of the Diels−Alder adducts, strong covalent bonds can form across the interfaces between deposited tracks. Tensile testing is performed on specimens fabricated using 0 and 90°raster angles, causing stress to be transferred either along the tracks or across the interlayer welds, respectively. The semi-IPN exhibits a degree of mechanical anisotropy of 11% without requiring specialized hardware or postprint processing steps, a marked improvement over about 60% in the typical polylactic acid used in FFF. The addition of the PCL makes the toughness of the blend 100× that of pure CAN, and the 3D-printed objects do not contain void space between tracks, making them fully dense.

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Stereolithography (SLA) in Pharmaceuticals

Ravi,

Patel

2023

Additive Manufacturing in Pharmaceuticals

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Characterization of the effect of in-process annealing using a novel print head assembly on the ultimate tensile strength & toughness of Fused Filament Fabrication (FFF) parts

Cited by 7 publications

References 35 publications

Medical 3D Printing Using Desktop Inverted Vat Photopolymerization: Background, Clinical Applications, and Challenges

Medical 3D Printing Using Desktop Inverted Vat Photopolymerization: Background, Clinical Applications, and Challenges

Plasticization of a Diels–Alder Covalent Adaptable Network for Fused Filament Fabrication

Stereolithography (SLA) in Pharmaceuticals

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