Results 201 to 210 of about 499,894 (252)

Production of Silica Aerogel

Physica Scripta, 1981
A production facility for silica aerogel has been set up in Lund. Aerogel is now produced in large quantities with the refractive indices of 1.03 and 1.05. The standard block size is 18 × 18 × 3 cm3.
S Henning, L Svensson
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Hydrophobic silica CO2 aerogels

Journal of Non-Crystalline Solids, 1993
A hydrophobic silica gel is prepared by hydrolysis of a triethoxysilane solution. The SiH group induces a repelling water effect. CO2 hypercritical drying is performed on such a gel. The obtained aerogel exhibits hydrophobic properties similar to those of the starting gel.
M. Pauthe, F. Despetis, J. Phalippou
openaire   +1 more source

Surfactant-templated silica aerogels

Microporous and Mesoporous Materials, 1998
By combining the molecular silica precursor tetramethoxysilane (TMOS) with an alkaline, micellar, water: methanol solution, we form surfactant-templated silica gel (STSG) monoliths. The wet monoliths can be exchanged with ethanol and then supercritically extracted with carbon dioxide to produce surfactant-templated silica aerogels (STSAs).
Mark T. Anderson, Patricia S. Sawyer, Thomas Rieker   +2 more
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Biopolymer-Containing Aerogels: Chitosan-Silica Hybrid Aerogels

2011
Hybrid aerogels comprising bioderived polymers and metal oxides have been explored in the case of chitosan and silica. The physical properties of homogeneous aerogels have been explored extensively and structural models have been formulated on the basis of the data.
Chunhua Jennifer Yao, Xipeng Liu, William M. Risen   +2 more
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Iron-Cobalt-Silica Aerogel Nanocomposite Materials

Journal of Sol-Gel Science and Technology, 2003
Iron-Cobalt-Silica nanocomposites were prepared in form of aerogels. X-ray diffraction, transmission electron microscopy and N2 physisorption at 77 K were used to investigate the structure, size and dispersion of the nanocrystals and the porous structure in the aerogels and in the final composites.
CASULA, MARIA FRANCESCA, CORRIAS, ANNA, PASCHINA G.   +2 more
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Nanomechanical Property Analysis of Silica Aerogel

Volume 1: 15th International Conference on Advanced Vehicle Technologies; 10th International Conference on Design Education; 7th International Conference on Micro- and Nanosystems, 2013
Aerogels (AGs) are open-cell nanofoams. AGs are lightweight and possess high thermal and acoustic insulation properties. Due to their ∼ 90% porosity, AGs are very brittle and fragile, which inhibits its use for load-bearing applications. For this reason an area of open research is the study and improvement of the mechanical properties of aerogels ...
Claudia Pagano, Curtis R Taylor
openaire   +1 more source

Molecular dynamics and experimental studies of nanoindentation on nanoporous silica aerogels

Materials Science & Engineering: A, 2019
The nanomechanics during the indentation test on low-density nanoporous silica aerogels remains one of the least understood and explored areas of mechanics.
Sandeep P. Patil, V. Parale, Hyung‐Ho Park, B. Markert   +3 more
semanticscholar   +1 more source

Silica aerogels; a review of synthesis, applications and fabrication of hybrid composites

Journal of porous materials, 2021
F. Akhter, S. A. Soomro, V. Inglezakis
semanticscholar   +1 more source

Fabrication of silica aerogel composite blankets from an aqueous silica aerogel slurry

Ceramics International, 2018
Abstract Low-density silica aerogel composite blankets were successfully fabricated from silica aerogel slurries via an impregnation technique. Silica aerogel powder formed a stable slurry in a mixed ethanol/water solution with a polyvinyl alcohol (PVA) binder.
Kyoung-Jin Lee, Yeong-Ju Choe, Young Hun Kim, Je Kyun Lee, Hae-Jin Hwang   +4 more
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Organically Modified Silica Aerogels

1994
Aerogels 1 are extremely porous materials which are usually prepared by supercritical drying of gels. Typical porosities of SiO2 aerogels are in the range of 85% to 98%, and densities as low as 3 kg/m3 have been reported. As a result of the high porosity, they have very interesting physical properties, such as a small index of refraction, a small Young’
Fritz Schwertfeger, Andreas Emmerling, Joachim Gross, Ulrich Schubert, J. Fricke   +4 more
openaire   +1 more source