Article
Polymer Science
Francesco Paolo La Mantia, Marilena Baiamonte, Stefania Santangelo, Roberto Scaffaro, Maria Chiara Mistretta
Summary: The photo-oxidation of polypropylene was studied at different temperatures and in different environments. The oxidation reactions were found to be strongly influenced by the availability of oxygen and the temperature. The degradation was fastest in air, followed by sea water and distilled water. Increasing the temperature significantly increased the degradation kinetics due to decreased oxygen solubility.
Article
Polymer Science
Jiangtao Fan, Cuiting Li, Xie Guo, Yuanming Deng
Summary: In this study, reversible addition-fragmentation polymerization of acrylamides initiated by a photo-Fenton-like reaction was reported. Methylene blue was used as a photosensitizer for H2O2 activation, generating hydroxyl free radicals to initiate polymerization. Successful aqueous RAFT polymerization was achieved within 20 min, giving high monomer conversion, narrow molecular weight distribution, and high fidelity. The performance and complexity of the initiation component, including H2O2 activation, oxygen elimination, and free radical capture, were investigated. The results indicated that the hydroxyl free radical production was a response to the initiation. Despite the short storage life, this photo-Fenton-like initiated RAFT polymerization holds promise for applications such as 3D printing and biomedical field.
Article
Materials Science, Multidisciplinary
Wouter Ruelens, Gilles Koolen, Briac Gricourt, Aart Willem van Vuure, Mario Smet
Summary: Furfuryl alcohol resins with varying amounts of comonomer were synthesized to inhibit the conjugation and crosslinking reactions of the resin. The pre-resins were briefly characterized and then cured to investigate their mechanical properties. The addition of 5% DMFA resulted in a remarkable increase in the strength and strain to failure of the cured resin.
Article
Chemistry, Inorganic & Nuclear
Bohong Gao, Pengfei Hao, Gao-Peng Li, Junju Shen, Yunlong Fu
Summary: The novel naphthalene diimide-based metal-organic framework exhibits excellent photochromic performance due to photoinduced electron transfer between electron-rich guest molecules and electron-deficient host framework. It shows discriminative photochromic behavior in the presence of different electron-rich solvents, and can potentially be used for visual detection of electron-rich organic amines, especially n-butylamine.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Multidisciplinary
Davide Campagna, Robert Goestl
Summary: This study reports a mechanochemical protecting group for secondary amines that can be activated in polymers through force-induced reactions. The research demonstrates that this protecting group can produce free amines in polymers through bond scission, similar to its photochemical counterpart. Additionally, the protecting group is applied in a force-activated organocatalytic reaction.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Polymer Science
Cedric P. P. Ambulo, Kyle J. J. Carothers, Ashford T. T. Hollis, Hannah N. N. Limberg, Lirong Sun, Carl J. J. Thrasher, Michael E. E. McConney, Nicholas P. P. Godman
Summary: Inverse vulcanization techniques are utilized to produce thermodynamically stable sulfur polymers with higher refractive indices and improved transparency in the mid-wave infrared region compared to organic polymers. This article discusses postsynthetic modification of sulfur polymers created via inverse vulcanization to generate novel inorganic/organic photoresists. Amine-containing sulfur resins are postfunctionalized with cross-linkable alkynes, allowing for rapid photo-crosslinking under UV irradiation to create patternable films within 10 minutes. This resin development enables the utilization of sulfur polymers in processes requiring spatial and hierarchical control and expands the applications of sulfur-based organic polymer systems with optical properties.
MACROMOLECULAR RAPID COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Mayank Goswami, Rajkumar Sadasivam, Gopinath Packirisamy
Summary: This study presents an Avastin loaded PHEMA hydrogel lens as a topical implant for the therapy of diabetic retinopathy (DR). The lens is designed using a novel and cost-effective 3D printed platform, with contours similar to a commercial contact lens for patient comfort and drug delivery capabilities. The release kinetics of the lens follows the Korsmeyer-Pappas (KP) release model, resulting in 40-60% anti-VEGF effects.
Article
Biochemistry & Molecular Biology
David S. Knoff, Samuel Kim, Kareen A. Fajardo Cortes, Jocelyne Rivera, Marcus V. J. Cathey, Dallas Altamirano, Christopher Camp, Minkyu Kim
Summary: Constructing protein-network materials with specific and stable physicochemical and mechanical properties requires suitable molecular cross-linkers. In this study, a multi-arm streptavidin design was characterized as a protein-network material platform using various biomolecular cross-linkers. The results showed that non-covalently associated streptavidin nanohubs exhibited extreme stability and behaved like hydrogels formed by chemical bonds even at high temperatures.
Article
Polymer Science
Isao Yamaguchi, Islam M. D. Tariqul, Aohan Wang
Summary: This study elucidates the reaction mechanism of N-(2,4-dinitrophenyl)pyridinium chloride with anionic dyes, leading to the formation of Zincke salts and ionic polymers. It was found that certain polymers are suitable for the detection of nucleosides, DNA, and proteins.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Xinhua Li, Xiaobao Li, Judi Ye, Liming Shen, Weiming Tan, Xinliang Luo
Summary: In order to fully utilize black liquor from pulping and reduce its pollution impact, lignin-based epoxy resin composite films were made from black liquor lignin. Fourier transform infrared spectroscopy confirmed the successful synthesis of lignin-based phenolic amine (LPAA) and the LPAA acted as a curing agent for the prepared epoxy resin films (LPAAF). The LPAAF showed good dispersion of black liquor's inorganic chemicals and exhibited higher tensile strength (30 MPa) and thermal stability compared to films cured with traditional phenolic amine. Thus, LPAAF made from black liquor lignin represents a novel utilization of black liquor.
Article
Materials Science, Multidisciplinary
E. F. Voznesensky, Y. A. Timoshina, I. I. Karimullin, N. Yu Anisimova, I. I. Larin, E. S. Statnik
Summary: The study focuses on using low-pressure radio-frequency discharge gas-discharge plasma to prepare antibacterial synthetic non-woven materials. The materials treated with silver nanoparticles-based preparations showed antibacterial activity against E. coli, confirmed through fluorescent staining and scanning electron microscopy. By utilizing radio-frequency gas-discharge plasma treatment, the antibacterial materials can achieve uniform properties and fixation of preparations for bacteriostatic and/or antibacterial activity across their entire surface area.
Article
Engineering, Chemical
Ramesh Tellagorla, Sweta C. Balchandani, Sasidhar Gumma, Bishnupada Mandal
Summary: This study investigates the equilibrium CO2 solubility in a novel activator (TAEA) and its blends with commercial solvents (MDEA and AMP) through experimental measurements and theoretical analysis. The data is modeled using Kent-Eisenberg equilibrium model and neural network model, and C-13 NMR and FTIR-ATR analysis are conducted to understand the reaction products in CO2-loaded solvents.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Review
Chemistry, Multidisciplinary
Yuvaraj Arun, Radhakanta Ghosh, Abraham J. Domb
Summary: Biodegradable, hydrophobic, and injectable liquid polymers are able to achieve sustained, local drug release, with potential applications in regenerative medicine.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Polymer Science
Maria Psarrou, Martha Georgia Kothri, Maria Vamvakaki
Summary: A new linear copolymer based on acylhydrazone linkages was synthesized and characterized for its degradation under both acidic and photo conditions. The copolymer was chemically linked to an anticancer drug to form amphiphilic polymer-drug conjugates, which self-assembled into spherical nanoparticles for therapeutic cargo release. The assemblies were disrupted under UV light and decreased pH, releasing the drug payload.
Article
Chemistry, Multidisciplinary
Xuxiao Liu, Ruilian Qi, Shumu Li, Wuran Liu, Yueyang Yu, Jihui Wang, Songmei Wu, Kejian Ding, Yu Yu
Summary: Covalent organic frameworks (COFs) with porphyrins as structural units are a new type of porous organic polymers that exhibit regular structure, abundant porosity, and good stability. A new COF structure, TA-Por-sp(2)-COF, was constructed by linking porphyrin with the triazine ring through the self-polymerization of a cyano group-terminated porphyrin. The resulting highly ordered two-dimensional topological structure exhibited high photocatalytic performance in organic reactions.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Analytical
Amelie St-Georges-Robillard, Mathieu Masse, Maxime Cahuzac, Mathias Strupler, Bishnubrata Patra, Adriana Mari Orimoto, Jennifer Kendall-Dupont, Benjamin Peant, Anne-Marie Mes-Masson, Frederic Leblond, Thomas Gervais
Article
Biochemical Research Methods
M. Marimuthu, N. Rousset, A. St-Georges-Robillard, M. A. Lateef, M. Ferland, A. -M. Mes-Masson, T. Gervais
Article
Physics, Applied
Michael R. Wertheimer, Amelie St-Georges-Robillard, Sophie Lerouge, Fackson Mwale, Bentsian Elkin, Christian Oehr, Werner Wirges, Reimund Gerhard
JAPANESE JOURNAL OF APPLIED PHYSICS
(2012)
Article
Physics, Applied
Amelie St-Georges-Robillard, Juan-Carlos Ruiz, Alain Petit, Hong Tian Wang, Fackson Mwale, Bentsian Elkin, Christian Oehr, Sophie Lerouge, Michael R. Wertheimer
PLASMA PROCESSES AND POLYMERS
(2012)
Article
Oncology
Dina Dorrigiv, Kayla Simeone, Laudine Communal, Jennifer Kendall-Dupont, Amelie St-Georges-Robillard, Benjamin Peant, Euridice Carmona, Anne-Marie Mes-Masson, Thomas Gervais
Summary: Cancer drugs have the lowest approval success rate in drug development programs, leading to a need for predictive preclinical assays. Tumor explant culture platforms have been developed to address this need, but the survival of tissue is influenced by model geometry and culture vessel type.
Article
Cell Biology
Amelie St-Georges-Robillard, Maxime Cahuzac, Benjamin Peant, Hubert Fleury, Muhammad Abdul Lateef, Alexis Ricard, Alexandre Sauriol, Frederic Leblond, Anne-Marie Mes-Masson, Thomas Gervais
INTEGRATIVE BIOLOGY
(2019)
Proceedings Paper
Microscopy
A. St-Georges-Robillard, M. Masse, J. Kendall-Dupont, M. Strupler, B. Patra, M. Jermyn, A. -M. Mes-Masson, F. Leblond, T. Gervais
PHOTONIC THERAPEUTICS AND DIAGNOSTICS XII
(2016)