Expandable Graphite
Size
0.50mm or 0.106mm, etc
Package
25 kg small bags into ton bags
Origin
China
Features
Preservative/Electrical and thermal conductivity, etc.
Application
Fireproof sealing element, flame retardant, refractory brick, etc.
Expandable graphite crystal is a typical layered carbon material. Other heterogeneous particles such as atoms, molecules, ions, and even atomic clusters are inserted into the interlayer of crystalline graphite by physical or chemical methods to form a new layered compound, which is called graphite interlayer compound, namely expandable graphite.
Request a quote
Expandable graphite is a synthetic embedded compound that expands or peels off instantaneously when heated. Once heated, its volume increases by up to 400 times, the loose packing density decreases, and the specific surface area increases by about 10 times, which can be pressed into a highly adhesive flexible graphite plate.
Expandable graphite is a synthetic embedded compound that expands or flares instantly when heated, it can be applied to environmental protection field. The franli plant found that there are many areas where expandable graphite will also be used, and the potential application areas are very extensive.
Surprising adsorption of expandable graphite
(1) Expanded graphite is hydrophobic and lipophilic, and can selectively remove non-aqueous solutions in water, such as removing oil slicks from seas, rivers, and lakes. Expanded graphite can form a certain winding space when absorbing oil, and can store oil substances much larger than its total pore volume. After absorbing a large amount of oil, it can be assembled into blocks and float on the liquid surface, which is easy to collect, and can be regenerated and recycled.
(2) For commonly used microbial (bacteria) treatment, expanded graphite is a good microbial carrier, so expanded graphite has a good application prospect in chemical water treatment, especially in water treatment of oily organic macromolecule pollution , and due to its chemical stability, regeneration and reuse after pollution control is relatively easy.
(3) As expanded graphite is basically composed of pure carbon, it is non-toxic and chemically inert, so it will not cause secondary pollution in water. In addition, expanded graphite can also be used for degreasing industrial wastewater emulsions and removing oil-soluble substances, such as pesticides, and has a good adsorption effect on many other organic or inorganic harmful components. In addition to selective adsorption in the liquid phase, expanded graphite also has a certain removal effect on the main components of air pollution such as SOx and NOx produced by industrial waste gas and automobile exhaust.
Other application prospects of expandable graphite
Expandable graphite has a large specific volume, loose packing volume of 100~300ml/g, stable chemical properties, high oxidation temperature (>400°C), and high safety, so it is an ideal heat insulation (heat preservation) and sound insulation material. The wall materials of high-end buildings and passenger ships in foreign countries are sandwiched with a layer of expanded graphite with a certain density to play the role of heat preservation and sound insulation, and in the event of a fire, it can prevent the spread of fire.
In foreign countries, expandable graphite has been added to the foam plastic cushion of the cabin seat and the warehouse wall. Once a fire starts to expand rapidly, the expanded graphite will occupy the space and block the fire spreading channel. Although expandable graphite is used, the physical and chemical properties of expandable graphite are still used. Expandable graphite is crushed into fine powder, which has good scattering and absorption characteristics for infrared waves. It is a good infrared shielding (stealth) material and plays an important role in the photoelectric countermeasures of modern warfare. The structure, properties and application of expanded graphite are under research and development.
The expansion characteristics of expandable graphite are different from other expansion agents, and are high-quality natural flake graphite produced by Franli factory, which is instantaneously treated at high temperatures and becomes worm-like, especially as a flame retardant material has obvious advantages, and can be used to purify water sources and protect the environment in the future. Such performance requirements are also extremely high, our Franli factory can provide such high-quality expandable graphite raw materials, if you need expandable graphite can contact us.
