2021年5月14日 · This paper reviews the synthesis of silica aerogels via sol-gel technique, and the applications where this extraordinary material has shown promising results. The different materials used for the fabrication of composites to improve and enhance the physical and chemical properties of silica aerogels are also presented.

2020年2月25日 · MIT researchers led by Evelyn Wang and Gang Chen are working to make a silica aerogel that's truly transparent so it can be incorporated into windows, where it would act as a good heat barrier but still allow occupants to see out.

2011年7月28日 · Silica-based aerogels are very light, as they are about 95% porous. Silica aerogels are very useful, but they have limitations—they are very fragile. NASA developed ways of creating aerogels that are polymer-reinforced.

What is Aerogel? The most common type of aerogel, silica aerogel, is derived from a sol gel reaction in which the liquid filled pores have been replaced with gas. This results in an extremely low-density solid that can be imparted with several remarkable properties such as hydrophobicity.

What a Silica Aerogel Looks and Feels Like. A high-purity, well-made silica aerogel will be highly transparent exhibiting a characteristic blue cast caused by Rayleigh scattering of the short wavelengths of light off of nanoparticles which make up the aerogel’s framework.

Silica aerogel is a nanostructured material with high specific surface area, high porosity, low density, low dielectric constant and excellent heat insulation properties. Many research works have been carried out concerning aerogel production and characterization.

2020年8月19日 · Here we present a direct ink writing protocol to create miniaturized silica aerogel objects from a slurry of silica aerogel powder in a dilute silica nanoparticle suspension (sol). The...

2024年1月1日 · Brief history, preparation, and a few potential applications of silica aerogel are discussed in this chapter. Synthetic methods involving sodium silicate and alkoxy silane precursors with particular insight into sol-gel chemistry are detailed. A critical step in aerogel realization is drying and various drying methods are detailed.

Silica aerogels have drawn considerable attention due to their low density (almost 95% of the total volume is composed of air), hydrophobicity, optical transparency, low conductivity of heat, and large surface to volume ratio. Sol–gel processing is …

Silica aerogels have the benefit of enabling the simple integration of different compounds in their structure, such as particles, polymers, and fibers, to improve mechanical or thermal characteristics.