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Recommended Papers for: Aerogels

Total Papers Found: 13

One-pot synthesis, characterization and properties of acid-catalyzed resorcinol/formaldehyde cross-linked silica aerogels and their conversion to hierarchical porous carbon monoliths

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 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 ...

Author(s): , , , , , , ,

Effective structure of aerogels and decomposed contributions of its thermal conductivity

Aerogels are nano-porous materials with impressive thermal insulation properties. This study uses a new theoretical model to predict the effective thermal conductivity of aerogels based on gas and solid conduction, as well as thermal radiation. A thermal constant analyzer measured the influence of gas pressure, atmosphere, and temperature on the thermal conductivity of nano-porous materials using the transient plane source (TPS) method. Results showed that the experimental thermal conductivity values ...

Author(s): , ,

New tannin-lignin aerogels

Tannin and lignin are organic materials that are more cost-effective than synthetic, non-renewable phenolic compounds. In this paper, tannin-lignin-formaldehyde (TLF) composites were used to synthesize thermally insulative mesoporous aerogels. A thermal analyzer measured the thermal conductivity of two TLF samples using the transient plane source (TPS) method. Results showed that the TLF aerogels had better thermal insulation properties than any other organic aerogels reported in the literature, and were well ...

Author(s): , , , , , ,

Influence of environmental factors on the adsorption capacity and thermal conductivity of silica nano-porous materials 

Aerogels have a wide range of properties that make them effective thermal insulators. However, these properties are lost when the materials absorb too much water. The goal of this experiment was to determine how temperature and humidity affect the insulative properties of silica nano-porous aerogels. A thermal constants analyzer measured the thermal conductivity of moist silica nano-porous materials using the transient plane source (TPS) method. Results showed that the thermal ...

Author(s): , , , , ,

Preparation and characterization of ultralow density silica aerogels by acetonitrile supercritical drying

In this study, ultralow density silica aerogels were synthesized and their thermal conductivities were tested to determine how supercritical drying affected the samples. A thermal analyzer measured the thermal conductivity of the silica aerogels using the transient plane source (TPS) method which determined that the thermal conductivity of silica aerogels increased with temperature....

Author(s): , , ,