A series of UV-curable, fluorine-containing mixtures were prepared by adding different micro amounts of small molecular weight fluorine-containing acrylate dodecafluoroheptyl methacrylate (DFMA) to an interpenetrating polymer network system composed of cycloaliphatic polyurethane acrylate, trimethylolpropane triacrylate, cycloaliphatic epoxy resin, free-radical photoinitiator Irgacure 754 and cationic photoinitiator Irgacure 250 with a weight ratio of 15:15:65:1:4. Hybrid coatings with different addition amounts of DFMA (0.2, 0.4, 0.6 wt.%) were … Continue reading The influence of tiny amount fluorine-containing acrylate on kinetics, morphology and properties free-radical/cationic hybrid UV-cured coatings

Polyurethane–acrylate oligomer terminated with multiple unsaturated bonds was prepared using isophorone diisocyanate, (IPDI), methylene diphenyl diisocyanate, and polyols as monomers, using 2,2-dimethylol propionic acid as hydrophilic chain extender, together with pentaerythritol triacrylate (PETA) as end-capper. The UV-curable waterborne polyurethane–acrylate (UV-WPUA) composite emulsion was obtained by mixing the PUA oligomer with certain content of reactive diluents and then dispersing the mixture in water. The molecular structure … Continue reading Preparation and Properties of UV-curable Waterborne Polyurethane–Acrylate Emulsion

A water-based polyurethane (PUR) acrylate water emulsion was selected as a radiation curable matrix for preparing nanocomposites including cellulose nanocrystals (CNC) prepared by controlled hydrolysis of Ramie fibers. Cross-linking polymerization of samples prepared in the form of films or of 1 mm-thick bars was either initiated by exposure to the 395 nm light of a high intensity LED lamp or by treatment with low energy electron beam … Continue reading Polyurethane Acrylate Networks Including Cellulose Nanocrystals: A Comparison between UV and EB- Curing

Ultraviolet (UV) curable organic-inorganic hybrid materials have attracted increasing researchers’ attention due to the environmental advantages and extensive application potential. In this work, a novel green fabrication of UV curable epoxy acrylate (EA)-silica hybrid coating via a sol-gel process induced by photochemical reaction was presented. The inorganic phase, silica was formed at present of an iodonium salt and tetraethyl orthosilicate, avoiding the application of acid … Continue reading Green Fabrication of Ultraviolet Curable Epoxy Acrylate-silica Hybrid Coatings

A set of multifunctional UV-cured thiol-ene polymer resins were systematically prepared from thiolactone containing monomers and different amine compounds. Aminolysis of the thiolactone moiety enabled the introduction of different side chains and cross-linkers into the polymers. The glass transition temperature of the polymers varied between 22 and 90 °C, depending on the type and molar ratio of amine-containing compounds relative to the monomer. The properties of … Continue reading UV-cured Multifunctional Coating Resins Prepared from Renewable Thiolactone Derivatives

UV-curable coating has gained popularity in many industries as an efficient yet environmentally friendly coating. This article presents a comprehensive study on the effect of different reactive diluents on the film properties of UV-curable coating. Palm-oil-based alkyd was chosen as the resin in this work due to its compatibility with many different types of reactive diluents. A total of four different types of commercially available … Continue reading Effect of Reactive Diluent on Physicochemical and Thermal Properties of UV-curable Alkyd Coatings

UV-curable multifunctional silsesquioxane-based nanoparticles (SQ-NPs) with hydroxyl and polymerizable groups were synthesized by hydrolytic co-condensation of two hydroxyl group-containing triethoxysilane (HEA-TES) molecules derived from 2-hydroxyethyl acrylate with hydrophobic triethoxysilanes carrying vinyl, methacryloyl, and methyl groups. The co-condensation in methanol in the presence of an acidic catalyst quantitatively produced multifunctional SQ-NPs with relatively narrow size distributions (average particle diameter < 5 nm) without gelation. The hydrophilic/hydrophobic balance, solubility, … Continue reading Synthesis of Multifunctional Silsesquioxane Nanoparticles with Hydroxyl and Polymerizable Groups for UV-curable Hybrid Coating

Fluorinated polycarbonate-based UV-curable polyurethane acrylate (F-PCUA) was synthesized by incorporating 1H, 1H, 2H, 2H-Perfluoro-1-octanol to the end of polycarbonate-based PUA chains. The structure of F-PCUA was determined by 1H-NMR, 19F-NMR, and FTIR analyses. The physical, surface, and thermal properties of F-PCUA were also examined. The F-PCUA was used as a hydrophobic additive in PUA coatings, and the water and oil wettability of the UV-cured film … Continue reading Fluorinated Polycarbonate-based Polyurethane Acrylate for UV-curable Coatings

With the increasing requirements of antibacterial in various fields, it is necessary to create ultraviolet (UV)-curable coating with antibacterial properties by adding antibacterial agents to coating formulations. Therefore, it is crucial to promote the development of coatings designed with UV-curable addition agents that possess excellent antibacterial activity and suitable mechanical properties. In this study, a series of silica nanoparticles was developed with photo-cross-linking and antibacterial … Continue reading Application of Organic–Inorganic Hybrid Silica Nanoparticles as Antibacterial Additives in UV-Curable Coatings