Subcritically dried RF-aerogels catalysed by hydrochloric acid
Reuß, Michael and Ratke, Lorenz (2008) Subcritically dried RF-aerogels catalysed by hydrochloric acid. Journal of Sol-Gel Science and Technology 47:74.
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Hydrochloric acid (HCl) used as catalyst for the preparation of RF-aerogels leads to organic aerogels in very short gelation times. The gelation time can be varied from a few seconds to minutes. The wet gels can be dried under ambient conditions. By variation of the sol composition or catalyst concentration the microstructure of the dry gels can be modified. The aerogel densities are in the range of 210-410 kg/m<sup>3</sup>. The particle sizes, determined by scanning electron microscopy (SEM), are in the range of 700 to 1500 nm. The particles look essentially spherical and their size spectrum can be close to monodisperse. The specific surface is measured by nitrogen adsorption (BET). Thermogravimetry (TGA) is employed to study the drying process, annealing reactions and decomposition of the aerogel into a carbon aerogel.
|Title:||Subcritically dried RF-aerogels catalysed by hydrochloric acid|
|Date:||02 April 2008|
|Journal or Publication Title:||Journal of Sol-Gel Science and Technology 47:74|
|In ISI Web of Science:||Yes|
|Keywords:||Sol-gel, RF-aerogels, Subcritically drying, Inorganic catalysis|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Space|
|HGF - Program Themes:||W - no assignement|
|DLR - Research area:||Space|
|DLR - Program:||W - no assignement|
|DLR - Research theme (Project):||W -- no assignement (old)|
|Institutes and Institutions:||Institute of Materials Physics in Space|
|Deposited By:||Dr.rer.nat. Michael Reuß|
|Deposited On:||14 Aug 2008|
|Last Modified:||27 Apr 2009 14:31|
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