منابع مشابه
MWCNT incorporated silica aerogel prepared by ambient pressure drying: A recyclable catalyst for multicomponent synthesis of benzylpyrazolyl coumarin at room temperature
Multiwalled Carbon Nanotube (MWCNT) reinforced silica aerogel was synthesized in a very simple and cost effective sol - gel method. The process was followed by ambient pressure drying, and then the aerogel material was characterized by XRD, BET, SEM, EDX and FT-IR. 2.3 x 10-3 wt% MWCNTs were successfully incorporated in sodium silicate based silica aerogel. This metal-free nanocomposite catalyz...
متن کاملThe effects of ambient humidity on the mechanical properties and surface chemistry of hygroscopic silica aerogel
The stress vs. strain relation of hygroscopic aerogels was tested in a controlled humidity chamber to study how the Young s modulus and non-recoverable strain are affected by the adsorption of water in the gel. Mass gains over desiccated conditions varied from 4% at 32% relative humidity (RH) to 12% at 70% RH. Above 70% RH, the samples failed catastrophically. The Young s modulus increased from...
متن کاملFabrication and Preliminary Characterization of Hydrophobic Silica Aerogel Films for Oil Remediation Studies
.................................................................................................. 3 List of Figures ............................................................................................ 4
متن کاملPreparation and Characterization of Silica Aerogel Microspheres
Silica aerogel microspheres based on alkali silica sol were synthesized using the emulsion method. The experimental results revealed that the silica aerogel microspheres (4-20 µm in diameter) were mesoporous solids with an average pore diameter ranging from 6 to 35 nm. The tapping densities and specific surface areas of the aerogel microspheres are in the range of 0.112-0.287 g/cm³ and 207.5-66...
متن کاملOptical shock waves in silica aerogel.
Silica aerogels are materials well suited for high power nonlinear optical applications. In such regime, the non-trivial thermal properties may give rise to the generation of optical shock waves, which are also affected by the structural disorder due to the porous solid-state gel. Here we report on an experimental investigation in terms of beam waist and input power, and identify various regime...
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ژورنال
عنوان ژورنال: MRS Proceedings
سال: 1994
ISSN: 0272-9172,1946-4274
DOI: 10.1557/proc-371-205