Photoinitiators

A Second-Generation Chameleon N-Heterocyclic Carbene–Borane Coinitiator for the Visible-Light Oxygen-Resistant Photopolymerization of Both Organic and Water-Compatible Resins

“…Visible-light-initiated photopolymerization − has become a very important topic over the past few years, owing for example to the development of 3D-printing. − Indeed, not only does it consume less energy than UV-initiated photopolymerizations, it also uses safer radiation and in principle allows the polymerization of UV-sensitive dyes. This has sparked a rush for new photoinitiating systems. − …”

Advancing 3D-Printed Microfluidics: Characterization of a Gas-Permeable, High-Resolution PDMS Resin for Stereolithography

“…Building off of previous work carried out by Bhattacharjee et al [ 18 ] and Gong et al [ 22 ], we formulated a custom resin using RMS-083 as the photopolymerizable PDMS, TPO-L as the photoinitiator, Sudan I as the photoabsorber, and ITX as the photosensitizer. The resolution of this resin was enhanced by the novel combination of photoabsorber with a photosensitizer, imparting an electron transfer reaction to improve curing efficiency [ 15 , 24 ]. The best performing resin that we present in this paper in terms of resolution and stable composition is 0.2 w / w % Sudan I, 0.4 w / w % ITX, 0.8 w / w % TPO-L, 98.6 w / w % RMS-083, and is referred to as Sudan I + ITX.…”

Improving Printability of Digital-Light-Processing 3D Bioprinting via Photoabsorber Pigment Adjustment

“…LAP also has relatively rapid polymerization kinetics, making it suitable for cell-encapsulation applications [ 15 ]. When a photoinitiator is exposed to the light energy of a reactive wavelength, it generates free radicals that initiate photopolymerization with the polymer in the bioink [ 16 , 17 ]. However, LAP is suited for the absorption of UV and blue-light wavelengths (350–400 nm); the UV absorption range has been known to negatively affect cell behavior and generate excessive heat [ 18 , 19 ].…”