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Article
Microstructure of low temperature processed CNFs/glass nanocomposites
Carbon nanofibers/glass (CNF/G) nanocomposites were obtained from a glass powder of low melting point and pristine CNFs. Green bodies containing from 0 to 22 % (v/v) of CNFs were sintered under nitrogen atmosp...
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Article
Processing and properties of carbon nanofibers reinforced epoxy powder composites
Commercially available CNFs (diameter 30–300 nm) have been used to develop both bulk and coating epoxy nanocomposites by using a solvent-free epoxy matrix powder. Processing of both types of materials has been...
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Article
Effect of reaction conditions on surface properties of TEOS–TBOT–PDMS hybrid materials
Hybrid materials based on tetraethoxysilane (TEOS), tetrabutyl orthotitanate (TBOT), and hydroxyl terminated polydimethyl siloxane (PDMS) have been prepared and characterized. The effects of HCl concentration ...
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Article
Study of the hydrolysis and condensation of γ-Aminopropyltriethoxysilane by FT-IR spectroscopy
The hydrolysis and condensation reactions of γ-APS have been studied in different acid content aqueous solution by using Fourier Transform infrared (FT-IR) spectroscopy. The hydrolysis of γ-APS under the studi...
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Article
Synthesis of inorganic-organic hybrid materials from TEOS, TBT and PDMS
Inorganic-organic hybrid materials have been synthesized by reaction of tetraethoxysilane (TEOS), titanium tetrabutoxide (TBT) and silanol-terminated polydimethylsiloxane (PDMS). The hydrolysis and polymerizat...
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Article
FT-IR and Porosity Study of Si-B-C-O Materials Obtained from TEOS-TEB-PDMS Derived Gel Precursors
Mixed vitreous oxycarbide glasses containing silicon and boron were prepared by pyrolysis of hybrid precursors in N2 at 1100°C. Four different precursors were synthesized through the sol-gel process using TEOS, T...
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Article
A FT-IR Study of the Synthesis of Boron Ormosils by Means of the Sol-Gel Process
Borosilicon ormosil materials can be prepared by using the sol-gel method. The precursors used for the synthesis were TEOS (tetraethylorthosilicate), TEB (triethylborate) and PDMS (silanol terminated polydimet...
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Article
Surface characterization of carbon fibers by inverse gas chromatography at low pressures
Carbon fiber surfaces were analyzed by inverse gas chromatography (IGC) and x-ray photoelectron spectroscopy (XPS). IGC measurements were carried out at infinite and finite dilution by using neutral and specif...
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Article
Surface Energy of Silica-TEOS-PDMS Ormosils
Inverse gas chromatography (IGC) was applied to characterize the surface energy of organically modified silicates (ormosils) by measuring the interaction of molecular organic probes with the ormosil surface. O...
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Article
Effect of TiO2 on the Pore Structure of SiO2-PDMS Ormosils
In this work, pore structure evolution of Ormosils containing TBT (Tetrabutyl titanate) has been characterized by means of mercury porosimetry, nitrogen adsorption and helium pycnometry. These ormosils have be...
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Article
Effect of the Measurement Temperature on the Dispersive Component of the Surface Free Energy of a Heat Treated SiO2 Xerogel
The surface free energy of a monolithic silica xerogel treated at 1000°C has been measured by inverse gas chromatography in the temperature range 25–150°C using n-alkanes. Values of the dispersive component, γS D
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Article
Study of the reaction of γ – methacryloxypropyltrimethoxysilane (γ – MPS) with slate surfaces
Thermal Analysis (TA) and Fourier Transform Infrared Spectroscopy (FT–IR); were used in order to study the reaction of γ-methacryloxypropyltrimethoxysilane (γ-MPS) with slate surfaces at different temperature ...
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Article
Preparation of nanometric titanium hydrous oxide particles by vapour phase hydrolysis of titanium tetrabutoxide
Spherical titanium nanoparticles in the range of 60 to 500 nm have been obtained by a vapour-phase hydrolysis procedure using titanium tetrabutoxide as raw material. In this work, different parameters such as ...
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Article
Effect of Reaction Parameters on the Hydrolysis of Zirconium Propoxide. A Study by Infrared Spectroscopy
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Article
Application of Inverse Gas Chromatography to the Study of the Surface Properties of Slates
Inverse gas chromatography (IGC) at zero surface coverage was used for determining the surface characteristics of a slate sample. Previously this sample had been characterized by means of X-ray diffraction (XR...
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Article
Surface Energy Changes of Heat Treated TEOS Derived Silica Xerogels
The surface energy of monolithic silica xerogels was examined by measuring the interaction of organic probes with xerogels heated at temperatures close to the gel-to-glass transition temperature. Values of the...
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Article
Characterization and sintering behaviour of submicrometre titanium dioxide spherical particles obtained by gas-phase hydrolysis of titanium tetrabutoxide
Spherical fine (∼0.7 μm) titania powders were prepared by vapour-phase hydrolysis of a titanium tetrabutoxide/butanol solution. Powder X-ray diffraction showed that as-prepared powders were amorphous and cryst...
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Article
Further insights into the porous structure of TEOS derived silica gels
The porous structure of TEOS derived silica gels was studied using nitrogen adsorption at 77 K. Silica gels were prepared using TEOS, H2O and ethanol for different molar ratios. No catalyst was used in this study...
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Article
Further Insights into the Porous Structure of TEOS Derived Silica Gels
The porous structure of TEOS derived silica gels was studied using nitrogen adsorption at 77 K. Silica gels were prepared using TEOS, H2O and ethanol for different molar ratios. No catalyst was used in this study...
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Article
Effect of heating on the surface fractal dimensions of ZrO2
