Category: Transient Plane Source
Keywords: Acid-catalyzed, Aerogels, Carbon monoliths, cross linking, density, Formaldehyde, Gelation time, glass, Glass wool, Hydrogen fluoride treatment, mechanical properties, Porous Structures, Resorcinol, Silica, Silicon dioxide (SiO2), strength, Temperature, Thermal Conductivity, Transient plane source (TPS), Transient plane source (TPS) method, Young's Modulus
Abstract: Aerogels are ultra-light, insulative, porous materials that have a wide variety of applications. The aim of this study was to synthesize resorcinol/formaldehyde (RF) cross-linked silica aerogels in one pot by acid catalysis. A Hot Disk TPS2500 thermal constant analyzer measured the thermal conductivity of the RF/SiO2 aerogels using the transient plane source (TPS) method. Results showed that although the RF/SiO2 aerogels had a lower density, their thermal conductivities resembled those of glass wool, and increased slightly after the carbonization process. Overall, the aerogels were highly efficient, and synthesizing other RF/oxide aerogels by one pot acid catalysis should be examined in the future.
Reference: Journal of Sol-Gel Science and Technology, 62, 3 (2012) 294-303