Vat photopolymerization of charged monomers: 3D printing with supramolecular interactions

Wilts, Emily M.; Pekkanen, Allison M.; White, B. Tyler; Meenakshisundaram, Viswanath; Aduba, Donald C.; Williams, Christopher B.; Long, Timothy Edward

doi:10.1039/c8py01792a

Cited by 49 publications

(37 citation statements)

References 32 publications

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“…This method of 3D printing provides micron-scale features with good accuracy and reproducibility. 5 While this technique enables access to high resolution 3D geometries, it is greatly limited by the availability of resins designed for additive processes. 6,7 There have been few examples of bio-sourced materials that were designed for AM via a vat photopolymerization process.…”

Section: Introductionmentioning

confidence: 99%

Additive Manufacturing of Bovine Serum Albumin-Based Hydrogels and Bioplastics

et al. 2019

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Bio-sourced and biodegradable polymers for additive manufacturing could enable the rapid fabrication of parts for a broad spectrum of applications ranging from healthcare to aerospace. However, a limited number of these materials are suitable for vat photopolymerization processes. Herein, we report a two-step additive manufacturing process to fabricate robust protein-based constructs using a commercially available laser-based SLA printer. Methacrylated bovine serum albumin (MA-BSA) was synthesized and formulated into aqueous resins that were used to print complex 3D objects with a resolution comparable to a commercially available resin. The MA-BSA resins were characterized by rheometry to determine the viscosity and the cure rate, as both of these parameters can ultimately be used to predict the printability of the resin. In the first step of patterning these materials, the MA-BSA resin was 3D printed, and in the second step, the printed construct was thermally cured to denature the globular protein and increase the intermolecular noncovalent interactions. Thus, the final 3D printed part was comprised of both chemical and physical cross-links. Compression studies of hydrated and dehydrated constructs demonstrated a broad range of compressive strengths and Young's moduli that could be further modulated by adjusting the type and amount of co-monomer. The printed hydrogel constructs demonstrated good cell viability (> 95%) after a 21-day culture period. These MA-BSA resins are expected to be compatible with other vat photopolymerization techniques including digital light projection (DLP) and continuous liquid interface production (CLIP). File list (2) download file view on ChemRxiv ChemRxiv manuscript_Nelson.pdf (2.02 MiB) download file view on ChemRxiv ChemRxiv_supporting_information_Nelson.pdf (2.95 MiB)

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Section: Introductionmentioning

confidence: 99%

Additive Manufacturing of Bovine Serum Albumin-Based Hydrogels and Bioplastics

et al. 2019

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“…When being immersed in the uncured resin, such linear polymer chain would be easily dissolved in the monomer again due to the lack of a cross‐linked network, leading to a poor surface dryness (Figure S4a, Supporting Information). [ 23 ] With the increases of HUA content, the surface dryness of the printed cartoon dogs gradually improved (Figure S4b–c, Supporting Information). Because a cross‐linked polymer network was created at the site of irradiation after the polymerization of the photocurable resin, restraining the printed parts from being dissolved in the monomer.…”

Section: Resultsmentioning

confidence: 99%

“…Nevertheless, the printing resolution has greatly deteriorated, that is because the printed scaffold polymerized by the monomer with a monofunctional group exhibited a thermoplastic material characteristic instead of highly cross‐linked thermosetting polymer, which would be dissolved in the monomer while the printing is ongoing. [ 23 ] In conclusion, it is a great challenge to prepare a flexible strain sensor with individual customization and refined structure. In specific, difficulties in the preparation of molds with good dimensional accuracy and solubility in a mild environment are still waiting to be addressed.…”

Section: Introductionmentioning

confidence: 99%

Tailored and Highly Stretchable Sensor Prepared by Crosslinking an Enhanced 3D Printed UV‐Curable Sacrificial Mold

Peng

Wang

Lin³

et al. 2020

Adv Funct Materials

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Taking advantage of unlimited geometry design, 3D printed sacrificial mold cast with highly conductive polymer composites is used to prepare a sensor with designed structures. However, the disposal of the mold in a mild condition while the refined structures can be maintained is still a challenge. Herein, a bifunctional monomer hydrolyzable hindered urea acrylate is synthesized to create a cross‐linked polymer network, preventing the dissolution of printed parts in the uncured resin. 3D printed scaffolds can be hydrolyzed in hot water, which provides an attractive option for sacrificial molds. Also, a porous flexible strain sensor (PFSS) is fabricated by casting polyurethane/carbon nanotubes composites into the sacrificial molds, which demonstrates a high stretchability (≈510%) and an excellent recoverability. Meantime, the pressure sensitivity (0.111 kPa−1) and a long‐term electrical resistance of PFSS is characterized. The resistance response signal remains nearly unchanged after 100 compressive loading cycles at a large strain of 60%. Benefiting from the design freedom of 3D printing, a practical application of the PFSS with a complex and customized structure to monitor human motion is demonstrated. These results prove that the sacrificial molding process has great potential for user‐specific stretchable wearable devices.

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“…The dynamically developing printing industry is a different direction of the application of photopolymerization, which enables printing on plastic or metal materials. Moreover, in recent years, a particular emphasis has been put on the use of photopolymerization processes for 3D-printing technology [ 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 ], including stereolithography in the design and formation of three-dimensional models [ 34 ].…”

Section: Introductionmentioning

confidence: 99%

Moving Towards a Finer Way of Light-Cured Resin-Based Restorative Dental Materials: Recent Advances in Photoinitiating Systems Based on Iodonium Salts

Topa

Ortyl

2020

Materials

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The photoinduced polymerization of monomers is currently an essential tool in various industries. The photopolymerization process plays an increasingly important role in biomedical applications. It is especially used in the production of dental composites. It also exhibits unique properties, such as a short time of polymerization of composites (up to a few seconds), low energy consumption, and spatial resolution (polymerization only in irradiated areas). This paper describes a short overview of the history and classification of different typical monomers and photoinitiating systems such as bimolecular photoinitiator system containing camphorquinone and aromatic amine, 1-phenyl-1,2-propanedione, phosphine derivatives, germanium derivatives, hexaarylbiimidazole derivatives, silane-based derivatives and thioxanthone derivatives used in the production of dental composites with their limitations and disadvantages. Moreover, this article represents the challenges faced when using the latest inventions in the field of dental materials, with a particular focus on photoinitiating systems based on iodonium salts. The beneficial properties of dental composites cured using initiation systems based on iodonium salts have been demonstrated.

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Vat photopolymerization of charged monomers: 3D printing with supramolecular interactions

Abstract: Vat photopolymerization of a trimethylammonium ethyl acrylate chloride solution (TMAEA) resulted in a well-defined, fully soluble, 3D printed rook.

Cited by 49 publications

References 32 publications

Additive Manufacturing of Bovine Serum Albumin-Based Hydrogels and Bioplastics

Additive Manufacturing of Bovine Serum Albumin-Based Hydrogels and Bioplastics

Tailored and Highly Stretchable Sensor Prepared by Crosslinking an Enhanced 3D Printed UV‐Curable Sacrificial Mold

Moving Towards a Finer Way of Light-Cured Resin-Based Restorative Dental Materials: Recent Advances in Photoinitiating Systems Based on Iodonium Salts

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