Multi‐Color 3D Printing via Single‐Vat Grayscale Digital Light Processing

Peng, Xirui; Liang, Yuanbo; Liang, Sizhuang; Montgomery, S. Macrae; Lu, Chunliang; Cheng, Chieh‐Min; Beyah, Raheem; Zhao, Ruike Renee; Qi, H. Jerry

doi:10.1002/adfm.202112329

Cited by 34 publications

(25 citation statements)

References 60 publications

(65 reference statements)

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“…Thus, several photocurable acrylate monomers and oligomers were chosen and used to fabricate 3D printed specimens for defining a triboelectric series. Some of the most used monomers in DLP printable formulations were thus selected, according to the literature, namely, PEGDA, , HDDA, and BEDA. , Moreover, a DLP printable PDMS-like silicone acrylate (i.e TEGORAD) was selected since polydimethylsiloxane (PDMS) is known for its elevate tribolectronegativity. , At last, commercial urethane acrylates, presenting different structures, were also evaluated (EBECRYL series), since polyurethanes have recently been proposed for the production of TENGs , and polyurethanes materials were exploited for DLP printing. − …”

Section: Resultsmentioning

confidence: 99%

Three-Dimensional Printing of Triboelectric Nanogenerators by Digital Light Processing Technique for Mechanical Energy Harvesting

Chiappone,

Roppolo,

Scavino

et al. 2023

ACS Appl. Mater. Interfaces

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Triboelectric nanogenerators (TENGs) represent intriguing technology to harvest human mechanical movements for powering wearable and portable electronics. Differently, compared to conventional fabrication approaches, additive manufacturing can allow the fabrication of TENGs with good dimensional resolution, high reproducibility, and quick production processes and, in particular, the obtainment of complex and customized structures. Among 3D printing technologies, digital light processing (DLP) is well-known for being the most flexible to produce functional devices by controlling both the geometry and the different ingredients of printable resins. On the other hand, DLP was not exploited for TENG fabrication, and consequently, the knowledge of the performance of 3D printable materials as charge accumulators upon friction is limited. Here, the application of the DLP technique to the 3D printing of triboelectric nanogenerators is studied. First, several printable materials have been tested as triboelectric layers to define a triboelectric series of DLP 3D printable materials. Then, TENG devices with increased geometrical complexity were printed, showcasing the ability to harvest energy from human movement. The method presented in this work illustrates how the DLP may represent a valuable and flexible solution to fabricate triboelectric nanogenerators, also providing a triboelectric classification of the most common photocurable resins.

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Section: Resultsmentioning

confidence: 99%

Three-Dimensional Printing of Triboelectric Nanogenerators by Digital Light Processing Technique for Mechanical Energy Harvesting

Chiappone,

Roppolo,

Scavino

et al. 2023

ACS Appl. Mater. Interfaces

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“…The future of DLP‐stereolithography 3D printing techniques may include resin and printing technology that can produce multicolor, including transparent parts in a single printable 3D model with susceptible interconnected structures and an increase in the printable volume of 3D models. [ 132 ] In addition, simultaneously printing multi‐materials with different mechanical (soft and hard), optical and biological properties with enhanced bonding ability to simulate the soft‐hard tissues interface should be improved. [ 133 ] Furthermore, in most cases, photocurable resins used in both DLP and SLA 3D printers are non‐bioresorbable and incompatible with cells, thus limiting their application in medical research.…”

Section: Limitations and Future Perspective Of Dlp And Sla 3d Printin...mentioning

confidence: 99%

Vat Photopolymerization Additive Manufacturing Technology for Bone Tissue Engineering Applications

2022

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Additive manufacturing has transformed the perspective of producing three dimensions (3D) objects toward achieving high quality in terms of accuracy, resolution, and high mechanical integrity with excellent surface finishing in little time compared to subtractive (traditional) production. Vat photopolymerization (VPP) additive manufacturing is among the most common 3D printing technology used in the medical field, academic research, and industrial production of 3D parts. Four main 3D printing techniques fall under VPP, namely continuous liquid interface production (CLIP), daylight polymer printing (DPP), stereolithography (SLA), and digital light processing (DLP). The last two are the focus of the present article. The high accuracy, precision, the unique ability to produce highly complex porous structural geometries, the low printing cost, and the production time of 3D structures compared to subtractive 3D manufacturing make DLP and SLA suitable for medical applications, specifically in regenerative medicine. This review presents the recent trend of DLP and SLA as used in medical research related to bone tissue engineering highlighting the mechanical and biological properties of the resulting 3D bone structures. In addition, photopolymerization mechanisms, photocurable materials, and the working principles of DLP and SLA are introduced.

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“…4D printing introduces the fourth dimension "time" into 3D printing, which means that 3D printed objects can change their shapes, properties, or functions under external stimulations (heat, light, magnetic field, etc.). [1][2][3][4][5][6][7][8][9] Owing to the stimuli-triggered response, 4D printing has attracted tremendous interest in public media, scientific research as well as industrial fields, such as robotics, [10][11][12][13][14][15] biomimetics, [16][17][18][19] textile industry, [20][21][22] and tissue engineering. [23][24][25] Over the past decades, various materials such as wood, [26] metals, [27] ceramics, [28] and hydrogels [15][16][17]29] have been used to achieve 4D printing.…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable 4D Printing of Reprocessable and Mechanically Strong Polythiourethane Covalent Adaptable Networks

Cui

Zhang

et al. 2022

Adv Funct Materials

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4D printing has attracted tremendous interest because of its potential applications in smart devices, biomedical and tissue engineering. However, conventional shape memory polymers suffer from the single permanent shape and recovery direction, the flexibility of 4D printing is significantly limited. Besides, the cross‐linked networks of photocuring 3D‐printed objects cannot be reprocessed or repaired. To address these issues, the dynamic thiocarbamate bonds are introduced into the photocurable methacrylate to prepare reprocessable and self‐healable 4D printing polythiourethane (4DP‐PTU) with Young's modulus of 1.2 GPa and tensile strength of 61.9 MPa. The printed objects can be easily repaired by reprinting on the damaged surface. The shape memorized 4DP‐PTU features high shape fixity and shape recovery, and reconfigurable permanent shape brought by the solid‐state plasticity. A dual‐mode triggered alarm is obtained by the incorporation of carbon nanotubes to demonstrate the potential application in smart alarms for warning of laser exposure or fire case. Moreover, the surface wettability and cell adhesion performance of 4DP‐PTU with excellent biocompatibility can be facilely adjusted through the exchange reaction with sulfhydryl compounds. Accordingly, 4DP‐PTU may show vast potential applications in the field of robotics, smart alarm, bio‐implants and in solving the environmental challenges of 3D‐printed products.

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Multi‐Color 3D Printing via Single‐Vat Grayscale Digital Light Processing

Cited by 34 publications

References 60 publications

Three-Dimensional Printing of Triboelectric Nanogenerators by Digital Light Processing Technique for Mechanical Energy Harvesting

Three-Dimensional Printing of Triboelectric Nanogenerators by Digital Light Processing Technique for Mechanical Energy Harvesting

Vat Photopolymerization Additive Manufacturing Technology for Bone Tissue Engineering Applications

Reconfigurable 4D Printing of Reprocessable and Mechanically Strong Polythiourethane Covalent Adaptable Networks

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