Infrared Characterization of PMMA-SiO 2 Hybrid Glasses Obtained by Sol-Gel Process
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INFRARED CHARACTERIZATION OF PMMA-SIO2 HYBRID GLASSES OBTAINED BY SOL-GEL PROCESS L.L. Díaz-Flores 1, A. S. López Rodríguez 1, P. SifuentesGallardo1, M.A. Hernàndez Rivera 1, M.a Garnica Romo 2, R. Bernal 4 and Yáñez-Limón J.M. 3 1
Universidad Juárez Autónoma de Tabasco, Av. Universidad S/N Zona de la Cultura CP. 86000 Villahermosa, Tabasco, México. 2 Facultad de Ingeniería Mecánica Universidad Michoacana de San Nicolás de Hidalgo Santiago Tapia 403, Col. Centro, CP 58000, Morelia, Michoacán, México 3 CINVESTAV-QRO Libramiento Norponiente 2000, Fracc. Real de Juriquilla, CP 76820 Querétaro, Qro, México. 4 Departamento de Investigación en Física, Universidad de Sonora, Apdo. Postal 5-088, Hermosillo, Sonora 83190, México Email: [email protected]
ABSTRACT This work is about the production of hybrid coatings of the system SiO2-PMMA (PMMA, polymethylmethacrylate). These materials have interesting mechanical and chemical properties useful for anticorrosive and wear resistance applications. SiO2-PMMA hybrids were obtained by the sol-gel traditional process, using tetraethylorthosilicate (TEOS) and methylmethacrylate (MMA) by Aldrich Co, as starting reagents. The SiO2:PMMA ratio was varied from 0:1 to about 1:1 at air atmosphere deposition. The coatings were obtained on acrylic sheets and silicon wafers. A diversity of coatings with chemical composition ranging from SiO2 and PMMA to obtain the SiO2-PMMA hybrids were obtained. Infrared (IR) and atomic force microscopy (AFM), were performed to determinate structural and morphological behavior. Keywords: Hybrid materials, Sol-gel, PMMA, Films. INTRODUCTION The combination at the nanosize level of inorganic and organic components in a single material makes accessible a new area of materials science that has extraordinary implications for developing novel multi-functional materials exhibiting a wide range of properties. The entrapment of organic reagents into sol-gel matrices has been the objective of much research carried out during the last years [1]. Depending upon the application, the requirements vary from dense optically transparent thin films, to porous thick layer coatings. The use of solution processing routes has advantages for large-scale production of these coatings and a number of such routes are available [2]. The sol-
gel process use a variety of different precursors and a common problem in many of this chemical solution routes to oxidize coatings is controlling the reaction of the precursors in order to engineer the microstructure of the resultant oxide [3]. In a previous work, scratch resistant and colored coatings have been developed using a sol-gel process. It has been also reported the fabrication of bulk materials with Ag concentrations to use in optical sensors [4]. In this work we report the development of a SiO2 –PMMA matrix obtained at room temperature and crystallized at 200 °C using the sol-gel process. The hybrid materials were characterized morphological and structurally by Infrared spectroscopy and atomic force microscopy. EXPERIMENT 25 m
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