Results 271 to 280 of about 671,705 (314)

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

Silica aerogel composites with embedded fibres: a review on their preparation, properties and applications

Journal of Materials Chemistry A, 2019
Silica aerogels are among the lightest solid materials but they are also very fragile. Fibres embedment is the most versatile and effective method to preserve a monolithic shape during drying, even at large scale, thus widening their applications.
Teresa Linhares, M. T. Pessoa de Amorim, L. Durães   +2 more
semanticscholar   +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

Flexible, high-temperature-resistant silica-polymer aerogel hybrids by templating polymethylsilsesquioxane microstructure with trace polyimide

Advanced Composites and Hybrid Materials, 2023
Xiaodong Wang, Ze Zhang, Yijun Wang, W. Malfait, Shanyu Zhao, Yulin Tian, Ting Liu, Xiaoxue Zhang, Ai Du, Jun Shen   +9 more
semanticscholar   +1 more source

A review of recent progress on the silica aerogel monoliths: synthesis, reinforcement, and applications

Journal of Materials Science, 2021
Jiming Lin, Guangze Li, Wei Liu, Ruoxiang Qiu, Huanyi Wei, Kai Zong, Xingke Cai   +6 more
semanticscholar   +1 more source

Synthesis of light weight recron fiber-reinforced sodium silicate based silica aerogel blankets at an ambient pressure for thermal protection

Journal of porous materials, 2022
S. B. Jadhav, A. Makki, D. Hajjar, P. Sarawade   +3 more
semanticscholar   +1 more source

Thermally insulating, fiber-reinforced alumina–silica aerogel composites with ultra-low shrinkage up to 1500 °C

, 2021
Fei Peng, Yonggang Jiang, Jian Feng, Huafei Cai, Junzong Feng, Liangjun Li   +5 more
semanticscholar   +1 more source

Textile waste-reinforced cotton-silica aerogel composites for moisture regulation and thermal/acoustic barrier

Journal of Sol-Gel Science and Technology, 2022
Teresa Linhares, V. Carneiro, B. Merillas, M. T. Pessoa de Amorim, L. Durães   +4 more
semanticscholar   +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