Results 191 to 200 of about 242,895 (228)

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
openaire   +1 more source

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
openaire   +2 more sources

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

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
openaire   +1 more source

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

Chemical Functionalization of Silica Aerogels

MRS Proceedings, 1996
Organofunctional silica aerogels were prepared by base catalyzed hydrolysis and condensation of Si(OR') 4 / RSi(OMe) 3 mixtures, followed by supercritical drying. In the trialkoxysilanes, R is of the type (CH 2 ) n A, the group A being an organic function.
Nicola Hüsing, Ulrich Schubert, Bernhard Riegel, Wolfgang Kiefer   +3 more
openaire   +1 more source

Cellulose-silica hybrid aerogels

2013
Silica aerogels are well-known ultra-light materials with potential applications such as thermal superinsulation (thermal conductivity at ambient conditions < 0.020 W.m-1.K-1), but their mechanical fragility limits their large-scale usage. To reinforce silica aerogels, we used cellulose aerogel (“aerocellulose”) as a reinforcing matrix. We describe the
Demilecamps, Arnaud, Alvès, Margot, Beauger, Christian, Hildenbrand, Claudia, Wiener, Markus, Reichnauer, Gudrun, Rigacci, Arnaud, Budtova, Tatiana   +7 more
openaire   +1 more source

Hydrophobic Silica Aerogels

2023
Ann M. Anderson, Mary K. Carroll
openaire   +1 more source

Effect of silica aerogel on thermal insulation and acoustic absorption of geopolymer foam composites: The role of aerogel particle size

Composites Part B: Engineering, 2022
Yuxuan Chen, Kinga Klima, Qingliang Yu
exaly  

Silica aerogel

IEEE Potentials, 2001
openaire   +1 more source