Efficient 3D printing via photooxidation of ketocoumarin based photopolymerization

Abstract

Photopolymerization-based three-dimensional (3D) printing can enable customized manufacturing that is difficult to achieve through other traditional means. Nevertheless, it remains challenging to achieve efficient 3D printing due to the compromise between print speed and resolution. Herein, we report an efficient 3D printing approach based on the photooxidation of ketocoumarin that functions as the photosensitizer during photopolymerization, which can simultaneously deliver high print speed (5.1 cm h−1) and high print resolution (23 μm) on a common 3D printer. Mechanistically, the initiating radical and deethylated ketocoumarin are both generated upon visible light exposure, with the former giving rise to rapid photopolymerization and high print speed while the latter ensuring high print resolution by confining the light penetration. By comparison, the printed feature is hard to identify when the ketocoumarin encounters photoreduction due to the increased lateral photopolymerization. The proposed approach here provides a viable solution towards efficient additive manufacturing by controlling the photoreaction of photosensitizers during photopolymerization.

Scattering Model for Composite Stereolithography to Enable Resin–Filler Selection and Cure Depth Control

“…The alumina filler caused deviations of nearly 500 μm (25%). The undesired lateral photopolymerization due to scattering results in a low resolution in the xy plane 45 and thus reduces the print fidelity. 9 As expected, large layer heights cause a significant staircase effect due to the slanted edges of each layer (Figure 5c).…”

Innovative Application of Three-Dimensional-Printed Breast Model-Aided Reduction Mammaplasty

“…This study adopts a multidisciplinary cooperation approach, which can make a better preoperative and more comprehensive evaluation and design with the help of the advantages of different disciplines, respectively, and can be extended to other operations with the help of 3D printed models. With the rapid development of 3D printing technology, its cost has been greatly reduced ( 18 – 20 ). The cost of the model used in this study is low and will not impose too much additional burden on patients (about 5% of the total surgical cost).…”

Nanoparticle‐Stabilized Emulsion Bioink for Digital Light Processing Based 3D Bioprinting of Porous Tissue Constructs

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