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Published on: September 19, 2020
Functionalization Effect on Polymer Nanocomposite Coatings Based on TiO₂⁻SiO₂ Nanoparticles with Superhydrophilic
Arturo Román Vázquez-Velázquez1, Miguel Angel Velasco-Soto2, Sergio Alfonso Pérez-García3
1Centro de Investigación en Materiales Avanzados S.C., Unidad Monterrey, Alianza Norte No. 202, Parque PIIT, 66628 Apodaca, Nuevo León, Mexico. arturo.vazquez@cimav.edu.mx.
Abstract:
In this study, a novel binary nanocomposite system based on TiO₂-SiO₂ was functionalized with trimethylolpropane triacrylate (TMPTA) and characterized by XPS and XRD. Results revealed that TiO₂-SiO₂ nanoparticles were covalently functionalized. Functionalized nanoparticles at low concentrations (0.1 wt % and 0.5 wt %) were dispersed in acrylic acid acting as a polymer matrix. Nanocomposite coatings analysis demonstrate to achieve superhydrophilic properties as well as very good optical characteristics. Water contact angle characterization showed the functionalization effect by achieving a superhydrophilic behavior with a contact angle less than 5°. UV-Vis measurements demonstrated high optical transmittance above 95% for the coatings. Based on the obtained results a mechanism describing the chemical interactions of the constituents responsible for the synergy in the nanocomposite as well as the morphological play role in the behavior are presented.
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