Effect of Thiocarbonylthio Compounds on Visible-Light-Mediated 3D Printing

2021 ◽  
Vol 54 (3) ◽  
pp. 1170-1182
Author(s):  
Zhiheng Zhang ◽  
Nathaniel Corrigan ◽  
Cyrille Boyer
Keyword(s):  
3D Printing ◽  
Visible Light

scholarly journals Efficient 3D printing via photooxidation of ketocoumarin based photopolymerization

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Xiaoyu Zhao ◽  
Ye Zhao ◽  
Ming-De Li ◽  
Zhong’an Li ◽  
Haiyan Peng ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Visible Light ◽  
Light Exposure ◽  
Three Dimensional ◽  
3D Printer ◽  
Light Penetration ◽  
Viable Solution

AbstractPhotopolymerization-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.

Methacrylated Quinizarin Derivatives for Visible-Light Mediated Photopolymerization: Promising Applications in 3D-Printing Biosourced Materials under LED@405 nm

2021 ◽  
Author(s):  
Louise Breloy ◽  
Vlasta Brezová ◽  
Zuzana Barbieriková ◽  
Yoshihiro Ito ◽  
Jun Akimoto ◽  
...  
Keyword(s):  
3D Printing ◽  
Visible Light

scholarly journals Synthesis, Characterization, and Visible Light Curing Capacity of Polycaprolactone Acrylate

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Jy-Jiunn Tzeng ◽  
Yi-Ting Hsiao ◽  
Yun-Ching Wu ◽  
Hsuan Chen ◽  
Shyh-Yuan Lee ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
3D Printing ◽  
Visible Light ◽  
Room Temperature ◽  
Low Viscosity ◽  
Nuclear Magnetic Resonance Spectra ◽  
Light Curing ◽  
Soft Tissue Engineering ◽  
The Fourier Transform ◽  
Visible Light Curing

Polycaprolactone (PCL) is drawing increasing attention in the field of medical 3D printing and tissue engineering because of its biodegradability. This study developed polycaprolactone prepolymers that can be cured using visible light. Three PCL acrylates were synthesized: polycaprolactone-530 diacrylate (PCL530DA), glycerol-3 caprolactone triacrylate (Glycerol-3CL-TA), and glycerol-6 caprolactone triacrylate (Glycerol-6CL-TA). PCL530DA has two acrylates, whereas Glycerol-3CL-TA and Glycerol-6CL-TA have three acrylates. The Fourier transform infrared and nuclear magnetic resonance spectra suggested successful synthesis of all PCL acrylates. All are liquid at room temperature and can be photopolymerized into a transparent solid after exposure to 470 nm blue LED light using 1% camphorquinone as photoinitiator and 2% dimethylaminoethyl methacrylate as coinitiator. The degree of conversion for all PCL acrylates can reach more than 80% after 1 min of curing. The compressive modulus of PCL530DA, Glycerol-3CL-TA, and Glycerol-6CL-TA is 65.7±12.7, 80.9±6.1, and 32.1±4.1 MPa, respectively, and their compressive strength is 5.3±0.29, 8.3±0.18, and 3.0±0.53 MPa, respectively. Thus, all PCL acrylates synthesized in this study can be photopolymerized and because of their solid structure and low viscosity, they are applicable to soft tissue engineering and medical 3D printing.

Efficient Photoinitiating System Based on Diaminoanthraquinone for 3D Printing of Polymer/Carbon Nanotube Nanocomposites under Visible Light

2019 ◽  
Vol 1 (5) ◽  
pp. 1129-1135 ◽  
Author(s):  
Guannan Wang ◽  
Nicholas S. Hill ◽  
Di Zhu ◽  
Pu Xiao ◽  
Michelle L. Coote ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
3D Printing ◽  
Visible Light

scholarly journals Coumarins as Powerful Photosensitizers for the Cationic Polymerization of Epoxy-Silicones under Near-UV and Visible Light and Applications for 3D Printing Technology

Molecules ◽  
2020 ◽  
Vol 25 (9) ◽  
pp. 2063 ◽  
Author(s):  
Mira Abdallah ◽  
Akram Hijazi ◽  
Frédéric Dumur ◽  
Jacques Lalevée
Keyword(s):  
3D Printing ◽  
Visible Light ◽  
Blue Light ◽  
Laser Diode ◽  
Cationic Polymerization ◽  
High Performance ◽  
Printing Technology ◽  
3D Printing Technology ◽  
Visible Irradiation

In this study, eight coumarins (coumarins 1–8) are proposed as near-UV and blue light sensitive photoinitiators/photosensitizers for the cationic polymerization (CP) of epoxysilicones when combined with 4-isopropyl-4’-methyldiphenyliodonium tetrakis(pentafluorophenyl)borate (IOD). Among these coumarins, four of them (coumarins 1, 2, 6 and 8) have never been reported in the literature, i.e., these structures have been specifically designed to act as photoinitiators for silicones upon near UV and visible irradiation. Good final reactive epoxy function conversions (FCs) and also high rates of polymerization (Rp) were achieved in the presence of the newly proposed coumarin-based systems. The polymers generated from the photopolymerization of epoxysilicones can be considered as attractive candidates for several applications such as: elastomers, coatings, adhesives, and so on. The goal of this study focuses also on the comparison of the new proposed coumarins with well-established photosensitizers i.e., 1-chloro-4-propoxythioxanthone (CPTX), 9,10-dibutoxyanthracene (DBA) or some commercial coumarins (Com. Coum). As example of their high performance, the new proposed coumarins were also used for laser write experiments upon irradiation with a laser diode at 405 nm in order to develop new cationic 3D printing systems.

scholarly journals Phenothiazine derivatives as photoredox catalysts for cationic and radical photosensitive resins for 3D printing technology and photocomposite synthesis

2019 ◽  
Vol 10 (45) ◽  
pp. 6145-6156 ◽  
Author(s):  
Mira Abdallah ◽  
Thanh-Tuân Bui ◽  
Fabrice Goubard ◽  
Dimitra Theodosopoulou ◽  
Frédéric Dumur ◽  
...  
Keyword(s):  
3D Printing ◽  
Visible Light ◽  
High Performance ◽  
Phenothiazine Derivatives ◽  
Printing Technology ◽  
3D Printing Technology

New phenothiazine derivatives are synthesized and proposed as high performance visible light photoinitiators.

Zinc Tetraphenylporphyrin as High Performance Visible Light Photoinitiator of Cationic Photosensitive Resins for LED Projector 3D Printing Applications

2017 ◽  
Vol 50 (3) ◽  
pp. 746-753 ◽  
Author(s):  
Assi Al Mousawi ◽  
Cyril Poriel ◽  
Frédéric Dumur ◽  
Joumana Toufaily ◽  
Tayssir Hamieh ◽  
...  
Keyword(s):  
3D Printing ◽  
Visible Light ◽  
High Performance
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