Azahelicenes as visible light photoinitiators for cationic and radical polymerization: Preparation of photoluminescent polymers and use in high performance LED projector 3D printing resins

2017 ◽  
Vol 55 (7) ◽  
pp. 1189-1199 ◽  
Author(s):  
Assi Al Mousawi ◽  
Frédéric Dumur ◽  
Patxi Garra ◽  
Joumana Toufaily ◽  
Tayssir Hamieh ◽  
...  
Keyword(s):  
3D Printing ◽  
Visible Light ◽  
Radical Polymerization ◽  
High Performance

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

Disubstituted Aminoanthraquinone-Based Photoinitiators for Free Radical Polymerization and Fast 3D Printing under Visible Light

2018 ◽  
Vol 51 (24) ◽  
pp. 10104-10112 ◽  
Author(s):  
J. Zhang ◽  
K. Launay ◽  
N. S. Hill ◽  
D. Zhu ◽  
N. Cox ◽  
...  
Keyword(s):  
Free Radical ◽  
3D Printing ◽  
Visible Light ◽  
Radical Polymerization ◽  
Free Radical Polymerization

scholarly journals 3-Carboxylic Acid and Formyl-Derived Coumarins as Photoinitiators in Photo-Oxidation or Photo-Reduction Processes for Photopolymerization upon Visible Light: Photocomposite Synthesis and 3D Printing Applications

Molecules ◽  
2021 ◽  
Vol 26 (6) ◽  
pp. 1753
Author(s):  
Mahmoud Rahal ◽  
Bernadette Graff ◽  
Joumana Toufaily ◽  
Tayssir Hamieh ◽  
Guillaume Noirbent ◽  
...  
Keyword(s):  
3D Printing ◽  
Visible Light ◽  
High Performance ◽  
High Rate ◽  
Visible Absorption ◽  
Free Radical Photopolymerization ◽  
Rate Of Polymerization ◽  
Direct Laser ◽  
Iodonium Salt ◽  
Very High

In this paper, nine organic compounds based on the coumarin scaffold and different substituents were synthesized and used as high-performance photoinitiators for free radical photopolymerization (FRP) of meth(acrylate) functions under visible light irradiation using LED at 405 nm. In fact, these compounds showed a very high initiation capacity and very good polymerization profiles (both high rate of polymerization (Rp) and final conversion (FC)) using two and three-component photoinitiating systems based on coum/iodonium salt (0.1%/1% w/w) and coum/iodonium salt/amine (0.1%/1%/1% w/w/w), respectively. To demonstrate the efficiency of the initiation of photopolymerization, several techniques were used to study the photophysical and photochemical properties of coumarins, such as: UV-visible absorption spectroscopy, steady-state photolysis, real-time FTIR, and cyclic voltammetry. On the other hand, these compounds were also tested in direct laser write experiments (3D printing). The synthesis of photocomposites based on glass fiber or carbon fiber using an LED conveyor at 385 nm (0.7 W/cm2) was also examined.

Thiol ligand capped quantum dot as an efficient and oxygen tolerance photoinitiator for aqueous phase radical polymerization and 3D printing under visible light

2021 ◽  
Vol 12 (35) ◽  
pp. 5106-5116
Author(s):  
Yifan Zhu ◽  
Emira Ramadani ◽  
Eilaf Egap
Keyword(s):  
Quantum Dots ◽  
3D Printing ◽  
Quantum Dot ◽  
Visible Light ◽  
Cadmium Selenide ◽  
Radical Polymerization ◽  
Aqueous Media ◽  
Cadmium Selenide Quantum Dots ◽  
Ppm Level ◽  
Thiol Ligand

We report here a rapid visible-light-induced radical polymerization in aqueous media photoinitiated by only ppm level thiol ligand capped cadmium selenide quantum dots. The photoinitiation system could be readily employed for photo 3D printing.

scholarly journals Carbazole-based compounds as photoinitiators for free radical and cationic polymerization upon near visible light illumination

2018 ◽  
Vol 17 (5) ◽  
pp. 578-585 ◽  
Author(s):  
Assi Al Mousawi ◽  
Ahmad Arar ◽  
Malika Ibrahim-Ouali ◽  
Sylvain Duval ◽  
Frédéric Dumur ◽  
...  
Keyword(s):  
Free Radical ◽  
Visible Light ◽  
Radical Polymerization ◽  
Cationic Polymerization ◽  
High Performance ◽  
Free Radical Polymerization ◽  
Light Illumination ◽  
Visible Light Illumination

Six new carbazole based compounds are synthesized and proposed as high performance photoinitiators for both the free radical polymerization of acrylates and the cationic polymerization of epoxides.

scholarly journals Development of new high‐performance visible light photoinitiators based on carbazole scaffold and their applications in 3d printing and photocomposite synthesis

2019 ◽  
Vol 57 (20) ◽  
pp. 2081-2092 ◽  
Author(s):  
Mira Abdallah ◽  
Diego Magaldi ◽  
Akram Hijazi ◽  
Bernadette Graff ◽  
Frédéric Dumur ◽  
...  
Keyword(s):  
3D Printing ◽  
Visible Light ◽  
High Performance

High Performance Visible-light-responsive TiO2/CuxO/Cu Photocatalyst

2016 ◽  
Vol 136 (8) ◽  
pp. 551-552
Author(s):  
Sumio Kogoshi ◽  
Nao Kato ◽  
Yu Katsui ◽  
Noboru Katayama ◽  
Syota Yazawa ◽  
...  
Keyword(s):  
Visible Light ◽  
High Performance
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