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Silica aerogels and their application for adsorption [Elektronski vir]Novak, Zoran ; Štandeker, Suzana ; Knez, ŽeljkoSilica monolith aerogels with different degrees of hydrophobicity were prepared bu incorporating methyltrimethoxysilane MTMS or trimethylethoxysilane TMES in standard sol-gel synthesis. Excellent ... properties of aerogels, obtained with the sol-gel synthesis, were preserved with supercritical drying with CO2. The degree of hydrophobicity of aerogels was tested by measuring the contact angle of a water droplet with the aerogel surface. The pore texture and BET surface areas of aerogels were determined by nitrogen physisorption. Adsorption capacity measurements show that silica aerogels are excellent adsorbents for different compounds dependent on its degree of hydrophobicity. Hydrophilic silica aerogels are shown to be better adsorbents of water moisture and vapours of volatile organic compounds from air than conventional absorbents. On the other hand, it was proved for hydrophobic silica aergels that they are efficient adsorbents of organic solvents from water.Source: 5th International symposium on high pressure process technology and chemical engineering, June 24-27, 2007, Segovia, Spain [Elektronski vir] (Str. 1-8)Type of material - conference contributionPublish date - 2007Language - englishCOBISS.SI-ID - 11463190
Author
Novak, Zoran |
Štandeker, Suzana |
Knez, Željko
Topics
kemijska procesna tehnika |
visokotlačna tehnologija |
superkritični CO2 |
sušenje |
aerogeli |
hidrofobnost |
adsorpcija |
lahkohlapne organske spojine |
vodna para |
chemical processing |
high-pressure technology |
supercritical CO2 |
drying |
volatile aerogels |
hydrophobicity |
adsorption |
volatile organic compounds |
water vapour
Shelf entry
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Database name | Field | Year |
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Novak, Zoran | 13568 |
Štandeker, Suzana | 24386 |
Knez, Željko | 02619 |
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