Effect of Terminal Alkyl Chains for Free Radical Photopolymerization Based on Triphenylamine Oxime Ester Visible‐Light Absorbing Type I Photoinitiators DOI

Jyun‐Bin Hsieh,

Shih‐Chieh Yen,

Fatima Hammoud

et al.

ChemistrySelect, Journal Year: 2023, Volume and Issue: 8(30)

Published: Aug. 7, 2023

Abstract In order to investigate the photopolymerization properties of alkyl chain length dependence Type I photoinitiators, in this study, a series visible‐light‐absorbing triphenylamine oxime esters ( Peko‐A ‐ D , and reference TP‐1M ) containing various periphery were synthesized. That is, an alkane segment contains isopropyl for butyl Peko‐B undecane Peko‐C pentadecane Peko‐D methyl respectively. Except all them have good organo‐solubility can dissolve testing monomer (trimethylolpropane triacrylate, TMPTA). All give from near UV visible‐light absorption regions with maximum peaks at around 360 nm show rather red‐shifted compared commercial OXE‐01 compound. Accordingly, photochemical reaction behavior was studied by cyclic voltammograms (CV), electron spin resonance (ESR) steady‐state photolysis. addition, based photoinitiating systems are through photo‐DSC experiment on light exposure wavelengths (UV lamp, LED@365 LED@405 nm). Under different source, penetration affects final double conversion efficiencies. As result, esters‐based formulation shows better efficiencies upon as irradiation source. Finally, new ester system capable applied direct laser write generate 3D patterns using diode @405 nm.

Language: Английский

Recent advances on photobleachable visible light photoinitiators of polymerization DOI Creative Commons
Frédéric Dumur

European Polymer Journal, Journal Year: 2023, Volume and Issue: 186, P. 111874 - 111874

Published: Feb. 1, 2023

Language: Английский

Citations

30
The future of visible light photoinitiators of polymerization for photocrosslinking applications DOI Creative Commons
Frédéric Dumur

European Polymer Journal, Journal Year: 2023, Volume and Issue: 187, P. 111883 - 111883

Published: Feb. 11, 2023

Language: Английский

Citations

27
Recent advances on core-extended thioxanthones as efficient photoinitiators of polymerization DOI Creative Commons
Frédéric Dumur

European Polymer Journal, Journal Year: 2024, Volume and Issue: 206, P. 112794 - 112794

Published: Jan. 26, 2024

Language: Английский

Citations

12
Light from Afield: Fast, High-Resolution, and Layer-Free Deep Vat 3D Printing DOI Creative Commons
Parth Chansoria, Riccardo Rizzo, Dominic Rütsche

et al.

Chemical Reviews, Journal Year: 2024, Volume and Issue: 124(14), P. 8787 - 8822

Published: July 5, 2024

Harnessing light for cross-linking of photoresponsive materials has revolutionized the field 3D printing. A wide variety techniques leveraging broad-spectrum shaping have been introduced as a way to achieve fast and high-resolution printing, with applications ranging from simple prototypes biomimetic engineered tissues regenerative medicine. Conventional light-based printing use material in layer-by-layer fashion produce complex parts. Only recently, new emerged which deploy multidirection, tomographic, light-sheet or filamented image projections deep into volume resin-filled vat photoinitiation cross-linking. These Deep Vat (DVP) approaches alleviate need layer-wise enable unprecedented fabrication speeds (within few seconds) high resolution (>10 μm). Here, we elucidate physics chemistry these processes, their commonalities differences, well emerging biomedical non-biomedical fields. Importantly, highlight limitations, future scope research that will improve scalability applicability DVP engineering medicine applications.

Language: Английский

Citations

12
Triplet Upconversion under Ambient Conditions Enables Digital Light Processing 3D Printing DOI Creative Commons
Connor J. O’Dea, Jussi Isokuortti,

Emma E. Comer

et al.

ACS Central Science, Journal Year: 2024, Volume and Issue: 10(2), P. 272 - 282

Published: Jan. 16, 2024

The rapid photochemical conversion of materials from liquid to solid (i.e., curing) has enabled the fabrication modern plastics used in microelectronics, dentistry, and medicine. However, industrialized photocurables remain restricted unimolecular bond homolysis reactions (Type I photoinitiations) that are driven by high-energy UV light. This narrow mechanistic scope both challenges production high-resolution objects restricts can be produced using emergent manufacturing technologies (e.g., 3D printing). Herein we develop a photosystem based on triplet-triplet annihilation upconversion (TTA-UC) efficiently drives Type photocuring process green light at low power density (<10 mW/cm2) presence ambient oxygen. system also exhibits superlinear dependence its cure depth exposure intensity, which enhances spatial resolution. enables for first-time integration TTA-UC an inexpensive, rapid, process, digital processing (DLP) printing. Moreover, relative traditional II (photoredox) strategies, present photoinitiation method results improved confinement resin shelf stability. report provides user-friendly avenue utilize processes paves way toward next-generation with geometric precision functionality.

Language: Английский

Citations

10
Liquid-Based 4D Printing of Shape Memory Nanocomposites: A Review DOI Creative Commons
Mohamad Alsaadi, Eoin P. Hinchy, C.T. McCarthy

et al.

Journal of Manufacturing and Materials Processing, Journal Year: 2023, Volume and Issue: 7(1), P. 35 - 35

Published: Jan. 31, 2023

Significant advances have been made in recent years the materials development of liquid-based 4D printing. Nevertheless, employing additive such as nanoparticles for enhancing printability and shape memory characteristics is still challenging. Herein, we provide an overview developments printing highlights novel 4D-printable polymeric resins their nanocomposite components. Recent manufacturing technologies that utilise liquid resins, stereolithography, digital light processing, material jetting direct ink writing, are considered this review. The effects nanoparticle inclusion within on mechanical 3D-printed components comprehensively discussed. Employing various filler-modified mixture nanosilica, nanoclay nanographene, well fibrous to support properties 3D considered. Overall, review paper provides outline 4D-printed nanocomposites terms cutting-edge research, including properties.

Language: Английский

Citations

22
Recent advances on water-soluble photoinitiators of polymerization DOI Creative Commons
Frédéric Dumur

European Polymer Journal, Journal Year: 2023, Volume and Issue: 189, P. 111942 - 111942

Published: March 2, 2023

Language: Английский

Citations

20
From Unregulated Networks to Designed Microstructures: Introducing Heterogeneity at Different Length Scales in Photopolymers for Additive Manufacturing DOI Creative Commons
Mojtaba Ahmadi, Katharina Ehrmann, Thomas Koch

et al.

Chemical Reviews, Journal Year: 2024, Volume and Issue: 124(7), P. 3978 - 4020

Published: March 28, 2024

Photopolymers have been optimized as protective and decorative coating materials for decades. However, with the rise of additive manufacturing technologies, vat photopolymerization has unlocked use photopolymers three-dimensional objects new material requirements. Thus, originally highly cross-linked, amorphous architecture cannot match expectations modern anymore, revealing largely unanswered question how diverse properties can be achieved in photopolymers. Herein, we review microstructural features soft matter should designed implemented to obtain high performance materials. We then translate these findings into chemical design suggestions enhanced printable Based on this analysis, found heterogenization most powerful tool tune photopolymer performance. By combining toolbox analytical characterization, examine current strategies physical (fillers, inkjet printing) (semicrystalline polymers, block copolymers, interpenetrating networks, induced phase separation) put them a scientific context develop roadmap improving diversifying photopolymers'

Language: Английский

Citations

9
Molecular Photothermal Conversion Catalyst Promotes Photocontrolled Atom Transfer Radical Polymerization DOI
Cristina Preston‐Herrera, Sajjad Dadashi‐Silab, Daniel G. Oblinsky

et al.

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(13), P. 8852 - 8857

Published: March 20, 2024

Photothermal conversion is a growing research area that promotes thermal transformations with visible light irradiation. However, few examples of dual photothermal and catalysis limit the power this phenomenon. Here, we take inspiration from nature's ability to use porphyrinic compounds for nonradiative relaxation convert into heat facilitate polymerization catalysis. We identify catalytic activity vitamin B

Language: Английский

Citations

8
Thermal aging behavior and heat resistance mechanism of ultraviolet crosslinked ultra‐high molecular weight polyethylene fiber DOI
Tianhong Dong, Fangfang Niu, Zhe Qiang

et al.

Journal of Applied Polymer Science, Journal Year: 2024, Volume and Issue: 141(28)

Published: May 2, 2024

Abstract As advances in heat resistant ultrahigh molecular weight polyethylene (UHMWPE) fiber via ultraviolet (UV) crosslinking, it is worth paying attention to its thermal aging behavior and resistance mechanism. UHMWPE fibers different forms, the fully drawn yarn (FDY) UV crosslinked FDY (UVFDY), are subjected isothermal at 135°C. The effects of on their surface morphology mechanical properties studied compared initially. results demonstrate that UVFDY a kind heat‐resistant fiber. Subsequently, reveal mechanism UVFDY, crystalline orientation structure evolution during further studied. It indicated formation dense‐packing crystals disorientation lead shrink, so number grooves appear surface. Since stucture hinders molecules movement, crystallization weaker than those FDY, resulting possesses slighter shrinkage ( T s ), fewer better FDY. Therefore, improves effectively after crosslinking. This work provides insights into structure–property relationship aging, offers basis data for application specific conditions.

Language: Английский

Citations

8