Article
Polymer Science
Logan D. Dugas, William D. Walker, Rahul Shankar, Keely S. Hoppmeyer, Travis L. Thornell, Sarah E. Morgan, Robson F. Storey, Derek L. Patton, Yoan C. Simon
Summary: This work describes a photopolymerized thiol-ene-based vitrimer that combines stability, healability, and reprocessability. The introduction of excess primary amines enables the degradation and regeneration of the vitrimer. Photopolymerization provides unique control over the network topology, facilitating further investigation of vitrimer properties.
MACROMOLECULAR RAPID COMMUNICATIONS
(2022)
Article
Chemistry, Physical
X. Peng, J. Zhang, M. M. Banaszak Holl, P. Xiao
Summary: This study investigates thiol-ene photopolymerization under different conditions and factors, finding that the polymerization rate decreases with increasing wavelength and all thiol-ene formulations exhibit homogeneous network structures. Additionally, incorporating a lower amount of thiol increases the storage modulus and the glass transition temperature of the photocured product.
Article
Polymer Science
Cuong Minh Quoc Le, Loic Vidal, Marc Schmutz, Abraham Chemtob
Summary: This study investigates the preparation of complex polymer colloids through miniemulsion polymerization, focusing on factors such as limited solubility and Ostwald ripening that affect droplet stability. The addition of a radical scavenger can delay polymerization, allowing for the determination of batch photopolymerization kinetics, molecular weight progress, and particle size distribution. The study emphasizes how initiator solubility, droplet size, and monomer solubility impact droplet nucleation.
Article
Materials Science, Multidisciplinary
Gulshakhar Kudaibergen, Zhanar Akhmetkarimova, Ertan Yildirim, Murat Baidarbekov
Summary: Cryogels based on biopolymers have exceptional properties and are suitable for various applications in tissue engineering and drug delivery. The injectable formation of cryogels, combined with their biocompatibility, has great potential in developing innovative systems for the human body. Our study focuses on synthesizing advanced generation cryogels using UV radiation and thiolene chemistry, using gelatin and hyaluronic acid as starting materials. We characterized the properties of these cryogels and found that they exhibited larger pore structures and greater swelling capacities compared to conventional hydrogels.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Polymer Science
Sergio Cespedes, Rachel A. Hand, Nikola Chmel, Graeme Moad, Daniel J. Keddie, Tara L. Schiller
Summary: The STMRT strategy was used to produce poly(ethylene glycol)-based model networks, allowing for the establishment of a structure-property relationship. The properties of the model networks can be finely tuned by manipulation of crosslink density and average polymer chain length.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Polymer Science
Aneta Lewandowska, Piotr Gajewski, Katarzyna Szczesniak, Mariola Sadej, Piotr Patelski, Agnieszka Marcinkowska
Summary: POSS significantly influences the synthesis and properties of hybrid organic-inorganic ionogels, with modified thiol-ene matrix resulting in non-leaking ionogels with improved properties. Steric hindrance and high-density network formation of POSS play important roles in ionogel synthesis, leading to enhanced mechanical and conductive properties.
Article
Chemistry, Physical
Jiarui Yue, Jun Nie, Xiaoqun Zhu
Summary: Thiol-ene polymerization is significant in photopolymerization, particularly in emerging industries. However, its research is hindered by poor storage stability and unclear spontaneous reaction mechanism. This study explored different ene structures to determine their effects on storage stability and mechanism of spontaneous reaction. The thiol-divinylbenzene (DVB) system was found to be stable due to moderate electron cloud density and conjugated structure. Additionally, it exhibited excellent photopolymerization efficiency and higher sulfur content compared to the thiol-acrylate system, indicating its potential and value for applications.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Polymer Science
Aneta Lewandowska, Piotr Gajewski, Katarzyna Szczesniak, Zbigniew Fojud, Mariola Robakowska, Andrzej Skrzypczak, Adam Voelkel, Agnieszka Marcinkowska
Summary: This work reports the synthesis of polymerizable ionic liquids (PILs) and the preparation of ionogels using thiol-ene photopolymerization. The ionogels prepared with the PILs showed excellent mechanical properties, high ionic conductivity, and thermal stability. The structure of the PILs affected the polymerization kinetics and properties of the ionogels.
Article
Biochemistry & Molecular Biology
Agnieszka Marcinkowska, Piotr Gajewski, Katarzyna Szczesniak, Mariola Sadej, Aneta Lewandowska
Summary: Flexible ionogels with good mechanical properties were obtained in situ by thiol-ene photopolymerization in four imidazolium ionic liquids. Ionogels with NTf2- anion are more puncture resistant than with OTf- anion, and have better electrochemical properties. Additionally, ionogels with the EMIm(+) cation exhibit higher conductivity compared to those with the BMIm(+) cation.
Article
Polymer Science
Christine Elian, Vlasta Brezova, Pauline Sautrot-Ba, Martin Breza, Davy-Louis Versace
Summary: Two new photopolymerizable vinyl (HNQA) and epoxy (HNQE) photoinitiators derived from lawsone were designed in this study. These photoinitiators can be used as one-component systems for free-radical polymerization without the addition of any co-initiators, and the introduction of iodonium salt as a co-initiator has shown enhanced polymerization rates. Additionally, thiol-ene reaction and cationic photopolymerizations can be concomitantly achieved with the HNQA/Iod photoinitiating system.
Article
Polymer Science
Aneta Lewandowska, Piotr Gajewski, Katarzyna Szczesniak, Agnieszka Marcinkowska
Summary: The influence of ene and thiol monomer structure on the mechanical and electrochemical properties of thiol-ene polymeric ionogels was investigated. Different monomer structures were found to significantly impact the mechanical strength and conductivity of the materials.
Article
Chemistry, Multidisciplinary
Christine Elian, Benjamin Mourot, Camil Benbouziyane, Jean-Pierre Malval, Sonia Lajnef, Fabienne Peyrot, Florian Massuyeau, Olivier Siri, Denis Jacquemin, Simon Pascal, Davy-Louis Versace
Summary: In this study, a near-infrared-absorbing heptamethine compound incorporating bulky benzo[cd]indole heterocycles was designed to prevent self-aggregation of the dye. Compared to a reference system, the incorporation of the heterocycles resulted in a significantly enhanced photoinitiating reactivity. The researchers achieved a 100% conversion of acrylates C=C bonds even under air conditions by incorporating the near-infrared sensitizer into a three-component system, which allowed for self-regeneration of the photoredox cycle. This cycle was thoroughly investigated by identifying the intermediates using EPR spectroscopy.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Applied
Gonul S. Batibay, Nergis Arsu
Summary: Radical-mediated thiol-ene photopolymerization is an extensively studied method in the field of click chemistry for its fast, controllable, and easy reaction under mild conditions. Various nano-sized photo-reactive groups or cross-linking agents have been added to improve the properties and suitability of polymeric nanocomposites prepared by photopolymerization. One-pot thiol-ene photo-click polymerization using 2-Mercaptothioxanthone (TX-SH) and alkene-functionalized polyhedral oligomeric silsesquioxane (POSS) was employed to prepare nanocomposite hydrogels with/without in-situ formed silver nanoparticles (Ag NPs). The conversion percentage of acrylates and swelling ratios of hydrogels were determined to evaluate the contribution of norbornenylethyl disilanol isobutyl polyhedral oligomeric silsesquioxane (1NBPOSS) or tris-norbornenyl isobutyl polyhedral oligomeric silsesquioxane (3NBPOSS) in the reaction. The obtained nanocomposites showed good thermal stability and the SEM images confirmed the formation of small-sized and uniform Ag NPs.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Nanoscience & Nanotechnology
Maciej Podgorski, Sijia Huang, Christopher N. Bowman
Summary: A photoprintable dynamic thiol-ene resin was developed for 3D printing, with optimized curing properties and high conversion rates achieved within a short period of time. The dynamic chemistry allowed for rapid reversible exchange, enabling reconfiguration and depolymerization of printed objects at specific temperature ranges, showing potential for new applications in shape memory and 4D printable functional materials.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Polymer Science
Roshni John Chethalen, Eli J. Fastow, E. Bryan Coughlin, Karen I. Winey
Summary: Polyolefins, the main components of plastic waste, lose their properties and value during conventional mechanical recycling. However, this study demonstrates the potential of functionalizing polyolefins using thiol-ene click chemistry to improve their properties. The reaction conditions can be manipulated to achieve different levels of functionalization.
Article
Polymer Science
Emna Chaabouni, Vitalii Tkachenko, Loic Vidal, Noureddine Allouche, Abraham Chemtob
Summary: A novel class of fully photodegradable all-acrylic poly(hydroxyethyl acrylate)-b-poly(o-nitrobenzyl acrylate) (PHEA-PNBA) nanoparticles has been investigated, showing the ability for fast and complete degradation. These nanoparticles are synthesized through dispersion polymerization-induced self-assembly and utilize a self-immolation mechanism for degradation. The focus of the research is on understanding the reaction parameters that control degradation rates.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Polymer Science
Cuong Minh Quoc Le, Tatiana Petitory, Xingyu Wu, Arnaud Spangenberg, Joanna Ortyl, Mariusz Galek, Lorena Infante, Heloise Therien-Aubin, Abraham Chemtob
Summary: The study introduces a new water-soluble photoinitiator with absorption in the visible and near-UV range, suitable for preparing hydrogels and aqueous polymer dispersions. This photoinitiator exhibits characteristics such as water solubility, shelf stability, low cytotoxicity, and efficient alpha-scission.
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Xingyu Wu, Bryan Gross, Benjamin Leuschel, Karine Mougin, Sebastien Dominici, Simon Gree, Mehdi Belqat, Vitalii Tkachenko, Benjamin Cabannes-Boue, Abraham Chemtob, Julien Poly, Arnaud Spangenberg
Summary: This study successfully achieved 3D microstructures printing using photo-controlled RAFT polymerization, obtaining structures with feature sizes of around 500 nm through precise spatial control of the photoreaction. The use of dormant polymeric RAFT agents allowed for photo-induced post-modification of the printed microstructures via elaboration of multi-chemistry patterns. These findings open up new perspectives in multi-material and 4D micro-printing.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Polymer Science
Cuong Minh Quoc Le, Gautier Schrodj, Ibrahima Ndao, Brahim Bessif, Barbara Heck, Thomas Pfohl, Guenter Reiter, Justine Elgoyhen, Radmila Tomovska, Abraham Chemtob
Summary: The photocatalytic thiol-ene aqueous emulsion polymerization under visible-light is a novel method to prepare linear semicrystalline latexes with specific properties. The reaction conditions are mild, the reaction time is short, and the resulting products exhibit a unique structure and characteristics.
MACROMOLECULAR RAPID COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Vitalii Tkachenko, Philippe Kunemann, Jean Pierre Malval, Tatiana Petithory, Laurent Pieuchot, Loic Vidal, Abraham Chemtob
Summary: Self-assembled block copolymer nanoparticles with high stability and uniformity were successfully prepared using photomediated RAFT polymerization-induced self-assembly method. The nanoparticles show potential for bioimaging applications due to their high stability and high yield.
Article
Engineering, Civil
Haitao Ge, Juan Carlos Quezada, Vincent Le Houerou, Cyrille Chazallon
Summary: This study introduces the Contact Dynamics method to investigate the interaction between tires and asphalt pavements. The results show that under full-braking conditions, asphalt mixtures exhibit instability and damage initiation, which provides important insights for pavement surface design.
ENGINEERING STRUCTURES
(2022)
Article
Chemistry, Physical
Cuong Minh Quoc Le, Marc Schmutz, Abraham Chemtob
Summary: By investigating the relationship between different monomers, it is found that above the critical micellar concentration, there is an exponential relationship between the number of particles and surfactant concentration, with the exponent depending on the polarity of the monomers. When one of the two monomers is highly hydrophobic, the exponent is generally higher.
COLLOID AND POLYMER SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Maryam Bahrami, Vincent Le Houerou, Jurgen Ruehe
Summary: This study investigates the unusual friction properties of swollen, surface-attached hydrogel layers in sliding contact. The hydrogel layers are covalently bonded to solid substrates using C-H insertion crosslinking. The results show that adhesion in such friction pairs is negligible due to the perpendicular swelling of the surface-attached hydrogel layers and the inability of polymer subchains on the two sides to interpenetrate. The tribological behavior of these hydrogel pairs is found to be dependent on load and sliding velocity, with the film thickness playing a significant role in the friction and lubrication mechanism.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Jean Muller, Charchit Kumar, Anik Kumar Ghosh, Vaibhav Gupta, Michel Tschopp, Vincent Le Houerou, Andreas Fery, Gero Decher, Matthias Pauly, Olivier Felix
Summary: This study reports on the fabrication of a direction-sensitive strain sensor using the anisotropic optical properties of silver nanowires. The macroscopic anisotropic properties of the sensor upon stretching can be measured using polarized UV-visible-NIR spectroscopy, allowing for retrieval of both local strain and deformation direction.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Leon Chiriatti, Violaine Tinard, Pierre Francois, Vincent Le Houerou
Summary: This study introduces an experimental method for non-destructive assessment of Young's modulus of freestanding thin material layers. The use of transverse wave ultrasonic transducers addresses the conflict in ultrasonic testing of thin material layers.
Article
Construction & Building Technology
Haitao Ge, Juan Carlos Quezada, Vincent Le Houerou, Cyrille Chazallon
Summary: As traffic increases, the deterioration of asphalt surface layers has become the main cause of road network costs. Current studies on tire-pavement interaction have limitations in modeling the discontinuity nature of asphalt mixtures. A coupling strategy of Finite Element Methods (FEM) and Discrete Element Methods (DEM) was developed in this study to model tire-pavement interaction. The study offers an expansion of both continuum and discrete mechanics methods for analyzing asphalt mixture responses under rolling tire loads.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Haitao Ge, Juan Carlos Quezada, Vincent Le Houerou, Cyrille Chazallon, Pierre Hornych
Summary: To understand road surface degradation mechanisms, it is necessary to examine the response of asphalt layers under realistic rolling tire loads. This study proposed a novel tire-sensor-pavement coupling chain to incorporate the realistic distribution of tire contact stress into the mechanical modeling of the asphalt layer. The tire contact stress distributions under different tire loading conditions were obtained using a sensor measuring system. The temperature- and frequency-dependent material behavior of asphalt mixes was described through the VENoL model. A new algorithm was developed to simulate the tire-pavement interaction system. The proposed method provides a fundamental requirement for understanding the structural behavior of asphalt pavement loaded by rolling tires and can contribute to asphalt pavement surface design insights.
ROAD MATERIALS AND PAVEMENT DESIGN
(2023)
Article
Chemistry, Physical
Andreas Hausberger, Marina Pecora, Damien Favier, Elisabeth Rossegger, Martin Tockner, Thomas Ules, Matthias Haselmann, Sandra Schloegl, Christian Gauthier
Summary: Structured surfaces have potential to serve as functionalized surfaces by specifically influencing friction and deformation behaviors. This study investigated the influence of different structures on surface friction behavior and its relation to real area of contact.
Article
Polymer Science
Cuong Minh Quoc Le, Fabrice Morlet-Savary, Abraham Chemtob
Summary: This study demonstrates the significant role of thiyl radicals produced by thiol oxidation in driving the spontaneous thiol-ene polymerization in the absence of solvents, heating, and intentional radical formation. Factors influencing reactivity, kinetics, solvation of thiols, and nature of initiating radicals were studied through various techniques, showing that the polarization of S-H bond drives thiol air oxidation. Thiols with electron-withdrawing substituents and hydrogen-bonded thiol-solvent (or thiol-alkene) complexes promote self-initiation by increasing S-H bond polarization.
Article
Polymer Science
Cuong Minh Quoc Le, Loic Vidal, Marc Schmutz, Abraham Chemtob
Summary: This study investigates the preparation of complex polymer colloids through miniemulsion polymerization, focusing on factors such as limited solubility and Ostwald ripening that affect droplet stability. The addition of a radical scavenger can delay polymerization, allowing for the determination of batch photopolymerization kinetics, molecular weight progress, and particle size distribution. The study emphasizes how initiator solubility, droplet size, and monomer solubility impact droplet nucleation.
