Table of Contents
- 1 What is the formula for aerogel?
- 2 What type of substance is aerogel called?
- 3 Is aerogel an element?
- 4 What is the R value of aerogel?
- 5 Why is aerogel called aerogel?
- 6 Is aerogel toxic?
- 7 What chemicals are in aerogel?
- 8 Can aerogel be sprayed?
- 9 What are Aerogels made of?
- 10 What is the density of aerogel?
- 11 What are the possible variations in the synthesis of aerogel?
What is the formula for aerogel?
SiO2
Chemical Identifiers
| Linear Formula | SiO2 |
|---|---|
| Pubchem CID | 24261 |
| IUPAC Name | Dioxosilane |
| SMILES | O=[Si]=O |
| InchI Identifier | InChI=1S/O2Si/c1-3-2 |
What type of substance is aerogel called?
An aerogel is an open-celled, mesoporous, solid foam that is composed of a network of interconnected nanostructures and that exhibits a porosity (non-solid volume) of no less than 50\%. The term “mesoporous” refers to a material that contains pores ranging from 2 to 50 nm in diameter.
Can aerogel stop a bullet?
Strong Enough To Stop a Bullet in its Track To collect these delicate particles, each smaller than a grain of sand, aerogel will gradually slow them to a stop without damaging them or altering their shape and chemical composition.
Is aerogel an element?
Aerogel, a sample of the element Silicon in the Periodic Table.
What is the R value of aerogel?
R-40/m
Aerogel is an extremely good thermal insulator, which at a pressure of one-tenth of an atmosphere has an R-value of R-40/m, compared to R-3.5/m for a fiberglass blanket.
Is a gel a liquid?
A gel is a liquid that is rendered solid by a more or less rigid but disordered network of microscopic particles dispersed throughout its volume. These jellylike materials are extremely common and are used in everything from foods and pharmaceuticals to paints and cosmetics.
Why is aerogel called aerogel?
Despite the name, aerogels are solid, rigid, and dry materials that do not resemble a gel in their physical properties: the name comes from the fact that they are made from gels. Aerogels have a porous solid network that contains air pockets, with the air pockets taking up the majority of space within the material.
Is aerogel toxic?
Is aerogel safe? Most aerogel blankets, particles, and monoliths are based on silica aerogel, which is comprised of synthetic amorphous silica. As a substance, synthetic amorphous silica has been found to not be harmful to humans—it is non-toxic and non-carcinogenic.
Who invented aerogel?
Samuel Stephens Kistler
Samuel Stephens Kistler, the inventor of aerogel. It is a great story and details the origins of aerogel. In it you will discover that aerogel was invented some time between 1929 and 1930, believe it or not, and was first commercialized as early as the 1950’s.
What chemicals are in aerogel?
The majority of aerogel is composed of silica, but carbon, iron oxide, organic polymers, semiconductor nanostructures, gold and copper can also form aerogel. However, within the aerogel structure, very little is solid material, with up to 99.8\% of the structure consisting of nothing but air.
Can aerogel be sprayed?
These aerogel beads, with a packing density of 0.03 to 0.05 g/cm3, can be used as pour-in, formable, or sprayable insulation, showing versatility in a variety of applications.
Can I make aerogel?
It is possible to make aerogels, including silica aerogels, without supercritical drying–in fact, using evaporative drying techniques. Not only that, you can make silica aerogel monoliths with high transparency, low density, and superinsulating abilities without supercritical drying.
What are Aerogels made of?
Aerogels are created by removing moisture from a gel while maintaining the gel structure. The resulting material provides very effective insulation. Since their invention, aerogels have primarily been made of silica. The silica is combined with a solvent to create a gel. This gel is then subjected to supercritical fluid extraction.
What is the density of aerogel?
Image Credits: NASA. One of the best known and most useful physical properties of aerogel is its incredible lightness-it typically has a density between 0.0011 to 0.5 g cm -3, with a typical average of around 0.020 g cm -3.
What is the melting point of silica aerogel?
Its melting point is 1,473 K (1,200 °C; 2,192 °F). Until 2011, silica aerogel held 15 entries in Guinness World Records for material properties, including best insulator and lowest-density solid, though it was ousted from the latter title by the even lighter materials aerographite in 2012 and then aerographene in 2013.
What are the possible variations in the synthesis of aerogel?
Variations in synthesis can alter the surface area and pore size of the aerogel. The smaller the pore size the more susceptible the aerogel is to fracture. Aerogel contains particles that are 2–5 nm in diameter. After the process of creating aerogel, it will contain a large amount of hydroxyl groups on the surface.