Large expansion volume and good adsorption performance Expanded graphite can have the best adsorption effect on oily sewage in oily sewage.Expanded graphite has an excellent effect on the adsorption of oily sewage. The winding space and interlayer pore structure of expanded graphite can be controlled by packing density and process conditions, so as to achieve the division of adsorption of large particle suspended oil and small particle emulsified oil.
(1) Manufacture of sealing materials. There are many substances harmful to the human body in industrial production, but graphite is different, it is harmless to the human body, and can replace almost all sealing materials, and its sealing and drying effect is excellent, which greatly reduces the production cost.
(2) The field of environmental protection. The expanded graphite obtained by high-temperature treatment has a rich porous structure inside, has good adsorption capacity, and is lipophilic and hydrophobic, and has a good effect in treating water pollution. It can not only absorb oil in water and other solutions , At the same time, it can also adsorb microorganisms such as bacteria. Its chemical properties are stable and it does not pollute the environment. The application prospect in this field is very promising.
(3) Fireproof materials. Expanded graphite has stable properties and good high temperature resistance. Using it as a sealing material for fire doors and windows can ensure the entry of smoke and dust in a fire. However, because it cannot effectively block the flow of cold smoke at room temperature or low temperature, it needs to be used in conjunction with conventional sealants.
（4）Since the expansion temperature of the halogen-free environmentally friendly flame retardant expandable graphite (EG) matches the thermal degradation temperature of RPUF, the "worm"-like carbon residue formed by expansion can quickly block the surface of porous RPUF, blocking the spread of flame to a certain extent, so it is very suitable for the flame retardancy of RPUF.
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