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Keyword: Aerogels

Total Papers Found: 13
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Systematic studies of tannin–formaldehyde aerogels: preparation and properties

Author(s): , , , ,

A variety of tannin-formaldehyde aerogels were produced in order to examine the effects of pH and dilution during their manufacture. The authors produced a phase diagram that could describe them. ...

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Engineering thermal and mechanical properties of flexible fiber-reinforced aerogel composites

Author(s): , , , , ,

The authors present a method of fiber-reinforced aerogel composites by impregnation of four layers of aligned glass fibers into silica sol layer-by-layer. The effect of different fiber alignments, as well ...

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Thermoelectric behavior of aerogels based on graphene and multi-walled carbon nanotube nanocomposites

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This paper proposes conducting carbon aerogels, composed of graphene and multi-walled carbon nanotubes, as an option for a thermoelectric material. The researchers found that this combination of materials increased the ...

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Investigation of transmittance and thermal conductivity properties of silica gels for application as transparent heat insulation materials

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In this article the effectiveness of silica aerogels as a transparent heat insulation material (TIM) is studied.  They are a good candidate for this application as the amount of energy ...

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Reduction of shrinkage and brittleness for resorcinol-formaldehyde aerogels by means of a pH-controlled sol-gel process 

Author(s): , ,

This article investigates how the thermal conductivity of a resorcinol-formaldehyde aerogels varies with increasing resorcinol (R) to water (W) ratios. The thermal conductivity was measured using the Hot disk transient ...

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

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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 ...

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Effective structure of aerogels and decomposed contributions of its thermal conductivity

Author(s): , ,

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, ...

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New tannin-lignin aerogels

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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 ...

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

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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 ...

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

Author(s): , , ,

In this study, ultralow density silica aerogels were synthesized and their thermal conductivities were tested to determine how supercritical drying affected the samples. A Hot-Disk TPS2500 measured the thermal conductivity ...

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