AEROGRAPHENE ®

AEROGRAPHENE OR GRAPHENE AEROGEL

Aerographene or graphene aerogel was discovered in March 2013 by a team led by Professor Gao Chao at Zhejiang University, China. It is a graphene - based aerogel having a density of 160g/m3 ( 0.0100 lbs / cubic foot), the lighter material after hydrogen, beating helium in the second position, with a density of 0.1786 mg/cm3 .

Until then, the team of Prof. Gao Chao had produced graphene unidimensional fibers and two-dimensional films, but for the aerogel they have developed a third dimension by a new method of lyophilization. The methods used so far, the sol-gel and template oriented methods have some problems, the first can be scaled, but produces poor controllability, whereas the second is limited by the size of the template. Prof. Gao’s team explored a new method -- freeze-drying method: they freeze-dried solutions of carbon nanotubes and graphene to get carbon sponge, this method can be easily scaled and create pieces as large as the templates and wich do not dependent on the container.

The first developed aerogel was also called " frozen smoke " is a colloidal gel-like substance in which the liquid is replaced by gas, can be produced of many different materials, silica, zirconia, carbon ... The first one was created by Samuel Stephens Kistler (1931) as a result of a bet with Charles Learned, in which he had to replace the liquid in a jam jar for gas, keeping the volume of it. Kistler used silicon dioxide for this aerogel. Is highly porous, usually composed of 90.5% to 99.8 % of air, so it has high insulation and absorbent properties.

Aerogels based on different materials have been developing and lowering its density index :

  • Aerogel based on silicon dioxide with a density of 1mg/cm3 ( Kistler, 1931)
  • Aerogel metallic microgrids based on nickel with 0.9 mg/cm3 density ( HRL Lab - University of California and Technology Calif. Inst ., 2011)
  • Aerographite, with a density of 0.18 mg/cm3 ( Kiel Univ and Univ Eng - Harburg Harburg, 2012).
  • Aerographene with a density of 0.16 mg/cm3 ( Zhejiang University, 2013).

Using the same example of Professor Sun Haiyan, from the team of Zhejiang Univ, "It's a bit like the large space structures of large stadiums, with steel bars as support and high strength films as the walls to achieve both lightness and strength. Here, carbon nanotubes are the supports and graphene is the wall".

APPLICATIONS FOR OIL SPILL REMEDIATION

According to findings published in the journal "Nature", titled " solid carbon, elastic and lightweight" absorption capacity of this material is amazing, it can suck up to 900 times its own weight in oil at a rate of 68.8 grams per second, but only oil, not water, making it the ideal material for cleaning oil spill cases. Furthermore, after cleaning, the materials, the aerogel, oil and water can be recycled.

Graphene batterie market

03.OCTOBER.2016

Graphene Battery Market by Battery Type, Industry, and Geography: Global Opportunity Analysis and Industry Forecast, 2014 - 2022", projects that the world graphene battery market is expected to reach $115 million by 2022.

graphene aerogel speaker

08.SEPTEMBER.2016

Scientists have created a new type of flat speaker that uses a graphene aerogel to create thermoacoustic sound, rather than sound through vibrations.

Graphene body implants

05.SEPTEMBER.2016

Researchers based in the US, Brazil and India have banded together to add another string to graphene’s bow, creating 3D structures which, in theory, could replace titanium-based bone implants in future.

GRAPHENE SPONGE PROPERTIES

21.APRIL.2016

A graphene-containing sponge, developed by scientists in South Korea, could pave the way towards artificial skin that can detect pressure and vibrations.

GRAPHENE AEROGEL USED

16.MARCH.2016

The reason they got so many requests for gloves and beanies stems from the kind of skin we have on our hands and ears. 

AEROGRAPHENE PRINTER

05.MARCH.2016

Recently, scientists poured graphene oxide suspension, a gel-like form of the material, into freezing molds to create 3D objects.

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