Dielectric and thermal studies of the segmental dynamics of poly(methyl methacrylate)/silica nanocomposites prepared by the sol-gel method

2012 ◽  
Vol 128 (6) ◽  
pp. 3771-3781 ◽  
Author(s):  
Konstantinos Kyriakos ◽  
Konstantinos N. Raftopoulos ◽  
Polycarpos Pissis ◽  
Apostolos Kyritsis ◽  
Franziskus Näther ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Sol Gel ◽  
Thermal Studies ◽  
Segmental Dynamics ◽  
Gel Method ◽  
Sol Gel Method ◽  
Poly Methyl Methacrylate ◽  
Silica Nanocomposites

scholarly journals Dynamic Mechanical Relaxation of Poly(2‐Hydroxyethyl Acrylate)‐silica Nanocomposites Obtained by the Sol‐gel Method

2007 ◽  
Vol 46 (1) ◽  
pp. 43-54 ◽  
Author(s):  
J. A. Gómez Tejedor ◽  
J. C. Rodríguez Hernández ◽  
J. L. Gómez Ribelles ◽  
M. Monleón Pradas
Keyword(s):  
Sol Gel ◽  
Mechanical Relaxation ◽  
Gel Method ◽  
Sol Gel Method ◽  
Dynamic Mechanical ◽  
Silica Nanocomposites

Iron and Iron-oxide on Silica Nanocomposites Prepared by the Sol-gel Method

2002 ◽  
Vol 17 (3) ◽  
pp. 590-596 ◽  
Author(s):  
G. Ennas ◽  
M. F. Casula ◽  
G. Piccaluga ◽  
S. Solinas ◽  
M. P. Morales ◽  
...  
Keyword(s):  
Sol Gel ◽  
Silica Matrix ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Gel Method ◽  
Sol Gel Method ◽  
Silica Nanocomposites ◽  
Transmission Electron ◽  
Nanometric Particles

γ–Fe2O3/SiO2 and Fe/SiO2 nanocomposites, with a Fe/Si molar ratio of 0.25, were prepared by the sol-gel method starting from ethanolic solutions of tetraethoxysilane and iron (III) nitrate. After gelation the xerogels were oxidated or reduced. Samples were investigated by transmission electron microscopy, x-ray diffraction, differential scanning calorimetry, and thermogravimetry. Magnetic properties of the samples were investigated at room temperature (RT) and at 77 K. Nanometric particles supported in the silica matrix were obtained in all cases. Bigger particles (10 nm) were obtained in the case of Fe/SiO2 nanocomposites with respect to the γ–Fe2O3/SiO2 samples (5–8 nm). A slight effect of sol dilution on particle size was observed only in the case of γ–Fe2O3/SiO2 nanocomposites. A superparamagnetic behavior was shown at RT only by γ–Fe2O3/SiO2 nanocomposites. Iron-based composites exhibited coercivity values higher than 700 Oe at RT.

Characterisation of nickel–zinc ferrite/silica nanocomposites with low ferrite concentration obtained by an improved modified sol–gel method

2010 ◽  
Vol 58 (1) ◽  
pp. 126-134 ◽  
Author(s):  
Marcela Stoia ◽  
Costica Caizer ◽  
Mircea Ştefănescu ◽  
Paul Barvinschi ◽  
Lucian Barbu-Tudoran
Keyword(s):  
Zinc Ferrite ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Silica Nanocomposites ◽  
Nickel Zinc

scholarly journals New insights into the photocatalytic activity of 3-D core–shell P25@silica nanocomposites: impact of mesoporous coating

2017 ◽  
Vol 46 (15) ◽  
pp. 4994-5002 ◽  
Author(s):  
Yichao Gong ◽  
Dan Ping Wang ◽  
Renbing Wu ◽  
Sarifuddin Gazi ◽  
Han Sen Soo ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Sol Gel ◽  
Core Shell ◽  
Gel Method ◽  
Sol Gel Method ◽  
Silica Nanocomposites ◽  
Surfactant Assisted

Core–shell TiO2 (P25)–mesoporous SiO2 nanocomposites was prepared via a surfactant-assisted sol–gel method.

Sign in / Sign up

Export Citation Format

Share Document