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Carbon Aerogels / Nanogels from READE PDF Print E-mail

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  • Carbon Aerogel Synonyms:

carbon aerogel, acid-catalyzed carbon aerogels, carbon nanotube aerogels, catalyst-infused aerogels, coated aerogels, doped aerogel, nanocrystalline diamond aerogel, fiber-reinforced aerogels, hybrid aerogels, metal aerogels, organic aerogel, quantum dot aerogels, nanogel, blue smoke, frozen smoke, solid smoke, low density micro-cellular materials, LDMM, aerogel blankets, aerogel composites, aerogel paper, aerogel particles,  aerogel supercapacitors, aerogel undergarments, auxetic, ceramic nanofoam, nanocellular carbon, nanofoam carbon paper, nanoscale foam, open cell foam, Samuel Kistler,

  • Carbon Aerogel Description:

1) Carbon aerogels are composed of particles with sizes in the nanometer range, covalently bonded together. They have very high porosity (over 50%, with pore diameter under 100 nm) and surface areas ranging between 400–1000 m²/g. They are often manufactured as composite paper: non-woven paper made of carbon fibers, impregnated with resorcinol-formaldehyde aerogel, and pyrolyzed.

2) Depending on the density, carbon aerogels may be electrically conductive, making composite aerogel paper useful for electrodes in capacitors or deionization electrodes. Due to their extremely high surface area, carbon aerogels are used to create supercapacitors, with values ranging up to thousands of farads based on a capacitance of 104 F/g and 77 F/cm³. Carbon aerogels are also extremely "black" in the infrared spectrum, reflecting only 0.3% of radiation between 250 nm and 14.3 µm, making them efficient for solar energy collectors.

3) The term "aerogel" has been incorrectly used to describe airy masses of carbon nanotubes produced through certain chemical vapor deposition techniques—such materials can be spun into fibers with strength greater than Kevlar, and unique electrical properties. These materials are not aerogels, however, since they do not have a monolithic internal structure and do not have the regular pore structure characteristic of aerogels.

  • Silica Aerogel Nominal Characteristics:

Nominal Characteristics*:

Extremely low thermal conductivity

9-12mW/mK

High porosity

>90% air

Nano-sized pores

20-40 nanometers

High surface area

~750m2/g

Very low tap density 

30-100kg/m3

High oil absorption capacity (DBP) 

540g/100g

Specific heat capacity Kj/Kg .7-1.15

Variety of particle sizes 

5 microns-4mm

Surface chemistry 

Completely hydrophobic

Opacity

Translucent, IR opacified and opaque

   

  • Carbon Aerogel Monoliths and Powders:

Because of the range of particle sizes needed for various powdered carbon applications, We do not stock sized materials at this time. Our standard material has a density of 0.6 g/cm3 and a surface area of 400 m2/g. It is sold as random 1 - 2 cm pieces in standard packages of 20, 100 and 500 grams. Larger quantities can be custom ground and sized. For special sizing or for quantities over 500 grams, ask for quotation.

  • Unique High Surface Carbon Powders:

1) Unlike activated carbon powders, high surface areas are inherent to the sol-gel process and do not depend on an "activation"procedures. However, such procedures have been used to produces carbon aerogel powders with approaching 2500 m2/g. Characterization of the primary particles that make up the aerogel network shows that they are composed of nanocrystalline, graphite-like ribbons that are intertwined to form the particles.

2) Another distinction from other high surface area carbon powders is that carbon aerogels have oxygen free surfaces that can increase their effectiveness in some applications.

  • Carbon WOI DOI Papers:

1) Consist of a non-woven carbon paper impregnated with a carbon aerogel. They typically have a density of 0.4 g/cm3 and a surface area of 400 m2/g. The pyrolysis from the RF aerogel sheet composite was conducted in N2 at 1050°C. These composite sheets are suitable for direct use as capacitors or deionization electrodes, etc., and have some degree of flexibility. The standard finished sheet size is 3.5" x 10" with a thickness of about 0.010".

2)  They are packaged in quantities of 10. Special pricing is available for quantities over 500 sheets. 

  • Carbon Aerogel Typical Applications:

1) Among their many applications, carbon aerogels have found use as electrode materials in several electrochemical devices, most notably, aerocapacitors and electrosorption processes.

2) Other potential applications include: Composite structures, reinforcing agents for organic rubbers, pigments for ink jet printers, electro-chemical storage devices, media for gas separations or storage, high temperature insulation, carriers for controlled release agents, electrodes for fuel cells, and nobel metal catalyst supports.

  • Carbon Aerogel CAS Number:

CAS# 7782-42-5

  • Silica Aerogel CAS Number:

CAS# 102262-30-6 (Silica, [(trimethylsilyl)oxy]-modified)

 

 
 

 

 

 

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