The Characteristics and Advantages of Expandable Graphite as Adsorbent
In the modern industry, the amount of Expandable Graphite is very large. In addition to being used as a flame-retardant and heat-insulating material in many industries, Expandable Graphite is also used as an adsorbent to absorb different oils or moisture due to its loose porous structure. Expandable Graphite used as a sorbent is a great advantage, today, graphite small series for everyone to talk about Expandable Graphite used as adsorbent characteristics and advantages:
First, Expandable Graphite can be made very good performance of the adsorbent.
Expandable Graphite is a good performance of the adsorbent, in particular, it has a loose porous structure, organic compounds with a strong adsorption capacity, 1 g of Expandable Graphite can absorb 80 g of oil, so the expansion of graphite was designed to various Industrial grease and industrial oil adsorbents. Expandable Graphite can easily adsorb oil, organic molecules and hydrophobic substances, for water environmental treatment has other substances irreplaceable effect. When it is used in granular form for the surface of oil, according to the size of the surface oil and oil types of different, the amount of 1 ~ lo% / rn, adsorption time can be 15rain to several h range.
Second, relative to other materials, Expandable Graphite adsorbent has a huge advantage.
Compared with other adsorbents, Expandable Graphite has many advantages. Such as cotton, grass ash, polypropylene fiber, perlite, vermiculite, etc., which are used in the presence of some of the adsorbents, such as cotton, grass ash, polypropylene fiber, vermiculite, etc. It is difficult for the post-treatment to absorb the oil, and the amount of the adsorbable amount of the Expandable Graphite is large, the oil is floated on the surface of the water, the fishing is easy to be recycled, the recycling is simple, and the extrusion, centrifugal separation, Solvent cleaning, combustion, heating extraction and other methods, and will not form secondary pollution.
Visible Expandable Graphite is very suitable for use as an adsorbent. Tinstone has been studying the production and processing of Expandable Graphite for over 30 years. It has a wealth of production experience and can handle high quality Expandable Graphite to meet all aspects of customer needs. There is a need for customers to visit the factory guidance.
The graphite is a natural flake graphite that has been chemically treated from scaly to loose, porous worm-like graphite. In industrial production, Expandable Graphite forms a tough carbon layer on the surface of the polymer, separating the combustible from the heat source; absorbing heat in the process of expansion, reducing the temperature of the system; releasing the acid in the interlayer during the expansion Ions, promote dehydration carbonation, and can combine the free radicals generated by combustion to interrupt the chain reaction. Expandable Graphite and phosphorus compounds, metal oxides can produce a synergistic effect, add a small amount can achieve the purpose of flame retardant.
Expandable Graphite for thermal insulation has a huge advantage:
One, Expandable Graphite produces less smoke and has a significant effect.
In general, in order to make the object has a fire-retardant fire function, will add halogen-containing flame retardant, but will produce smoke and acid gases, which will affect people's health will also corrode indoor equipment; will add metal hydroxide, but Will have a great impact on the impact resistance and mechanical strength of the plastic or substrate; it will also add phosphorus flame retardant, but in the case of air is not very smooth will have a serious impact on people. Expandable Graphite is even more ideal. Will produce very little smoke and the flame retardant effect is remarkable.
Expandable Graphite is a corrosion-resistant material that exists in a stable crystalline form. Not because of limited shelf life and stability, in the decomposition, oxidation deterioration until failure.