Lignin Derivative as Visible‐Light Photo‐Initiating System for the Development of Biocide Materials under Light Irradiation
Year: 2024
Type: article
Abstract: The design of a new visible-light methacrylated-based kraft lignin photosensitizer (MAcL) of iodonium salt (Iod) for the free-radical polymerization (FRP) of polyethylene glycol dimethacrylate (PEGDMA) under LEDs@405, 455, 470, 505, and 530 nm is reported. As demonstrated by laser flash photolysis (LFP) and electron paramagnetic resonance spin-trapping (EPR ST) experiments, the combination of MAcL with an electron acceptor (Iod) and trimethylolpropane tris(3-mercaptopropionate) (TT) used as a crosslinker, leads to the formation of highly efficient initiating radicals, i.e., thyil and carbon-centred radicals, promoting thus the FRP of PEGDMA. The final methacrylate conversions of PEGDMA are very high and range from 80 to 95% under LED@530 nm and LED@405 nm, respectively. For the first time, MAcL is also used as a biocide agent as it produces singlet oxygen when exposed to visible light. The resulting photoinduced bio-based materials incorporating MAcL demonstrate tremendous antibacterial properties against Staphylococcus aureus (S. aureus), inducing 100% bacterial death.
Institutions: Centre National de la Recherche Scientifique, Université Paris-Est Créteil, Institut de Chimie et des Matériaux Paris-Est, Laboratoire Eau, Environnement et Systèmes Urbains, Institut des Sciences Moléculaires d'Orsay, University of Cagliari, Politecnico di Torino, Université Paris Cité, Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, Sorbonne Université
Language: English
Subfield: Organic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4405619829