Visible Light Induced High Resolution and Swift 3D Printing System by Halogen Atom Transfer

Abstract

3D printing technology offers solutions for numerous needs in industry and the daily life of individuals. In recent years, most research efforts have focused on this technology as the market share has grown and requirements have become specified in their related fields. In this work, a novel visible light induced 3D printing system with high resolution and short printing time using dimanganese decacarbonyl (Mn 2 (CO) 10 ) in combination with organic halides is reported. The radicals formed through halogen abstraction by photochemically generated manganese pentacarbonyl from organic halides with high quantum efficiency initiate the polymerization of acrylic resins. The kinetics of the process using various halide-containing molecules in the photoinitiaiting system are investigated with real-time fourrier transform infrared spectroscopy and photo-differential scanning calorimetry analyses, and the characteristics of 3D printouts are presented and compared with that of the commercial photoinitiator, 2,4,6-trimethylbenzoyl)phosphine oxide without Mn 2 (CO) 10 . The results obtained confirm that the combination of Mn 2 (CO) 10 and structurally diverse organic halides is a class of promising 3D system for various applications.

Visible Light Induced Degradation of Poly(methyl methacrylate‐co‐methyl α‐chloro acrylate) Copolymer at Ambient Temperature

“…It is known that the bromine atom is easier to be abstracted resulting in higher concentration of free radicals in a short time interval that may lead to coupling reactions instead of degradation. [ 56,64 ]…”

“…It is known that the bromine atom is easier to be abstracted resulting in higher concentration of free radicals in a short time interval that may lead to coupling reactions instead of degradation. [56,64] The kinetics and temporal characteristics of the degradation process have been investigated by taking aliquot samples from the reaction media at specified times. As can be seen from Table 2, Figures 1 and 2, the increasing ratio of methyl 𝛼-chloro acrylate (MCA) component in copolymer exhibits an increase in the degradation yield.…”

Recent advances on diaryliodonium-based monocomponent photoinitiating systems

“…[1] Nowadays, photopolymerization is used in research fields such as 3D and 4D printing, adhesives, coatings and varnishes, solvent-free paints, microelectronics or dentistry. [2][3][4][5][6][7][8][9][10][11][12][13][14][15] Historically, photopolymerization was developed with photoinitiating systems activable in the UV range.…”

Recent Advances in Visible Light Photoinitiating Systems Based on Flavonoids

“…Nowadays, tremendous efforts are devoted to developing highly efficient photoinitiating systems activable under visible light. Indeed, photopolymerization is used in a wide range of applications of photopolymerization from coatings and varnishes, adhesives, solvent-free paints and dental restoration materials to 3D/4D printing and microelectronics [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. If the reactivity of photoinitiators remains the main parameter governing the design of new structures, their toxicities and biocompatibilities are more and more regarded [16][17][18][19].…”