Preparation and characterization of poly(MSMA-co-MMA)-TiO2/SiO2 nanocomposites using the colloidal TiO2/SiO2 particles via blending method

Elaboration and characterization of TiO2 nanoparticles incorporated in SiO2 host matrix

“…Titanium dioxide supported on amorphous and zeolitic silica has been extensively studied as catalyst [1][2][3][4] or as catalytic support [5][6][7]. In addition, titania silica TiO 2 /SiO 2 (TS) composites have aroused considerable interest for optics application, including antireflective coatings and optical planar waveguides, due to their high thermal stability, high chemical durability, low thermal expansion coefficient, and flexibly adjustable refractive index [8][9].…”

“…Titanium dioxide can also be incorporated into silicates by postsynthesis method [13]. Many studies on the structure of sol-gel-derived TS composite have been performed, including IR spectroscopy, X-ray diffraction, nuclear magnetic resonance, transition electron microscopy, atomic force microscopy and visible photoluminescence (PL) properties [1][2][3]14].…”

Versatile SiO2 Nanoparticles@Polymer Composites with Pragmatic Properties

“…Even stretching and in-plane bending vibrations of -OH group corresponding to the molecular H 2 O usually observed around 3400 cm −1 and 1640 cm −1 were absent in the ATR spectra of SNP@PVA filmThis corroborated the cross-linkage between PVA and SNP. In the SNP@PVA film spectra, bands at 800 cm −1 and 950 cm −1 (merged with 1086.5 cm −1 ) portray symmetric Si-O-Si stretching and Si-OH flexible vibration modes, respectively, whereas the SNP@PMMA film spectra depict only the symmetric Si-O-Si stretching modes [18] due to the innate polymeric functional groups and their peculiar chemical bonding with the SNP. The characteristic band at 2357 cm −1 was observed for SNP@PMMA film but absent in case of SNP@PVA film.…”

Synthesis and Characterization of Poly(methyl Methacrylate)-Silica, -Alumina and -Silica-Alumina Sol-Gel Nanocomposites

“…It was possible to assign some of them because they are wider and weak in PMMA; however, they are more intense and sharp in the nanocomposites. In PMMA-SiO 2 there are some frequencies typical to silica at 1100, 800 and 460 cm -1 due to the vibrations Si-O-Si and Si-OH (18,19 (20). In PMMA-SiO 2 -Al 2 O 3 the bands were not clearly identified at 2965 and 1601 cm -1 , attributed to Si-O-Al (21), thus it was impossible to establish the connection structure between the silica and alumina components.…”