Due to the differences in structure and properties between high-temperature bitumen and activated carbon, the effects of their interactions are also different. High-temperature bitumen is a polymer compound with a complex chemical structure that can react chemically with activated carbon, which can have an impact on the properties of activated carbon.
First of all, high-temperature bitumen can change the surface properties of activated carbon. The organic functional groups in high-temperature asphalt can react with oxygen-containing functional groups such as hydroxyl and carboxyl groups on the surface of activated carbon, thereby changing the polarity and hydrophilicity of the surface of activated carbon. This reaction results in an increase in the hydrophobicity of the activated carbon surface, which makes it less dispersed in water.
Secondly, high-temperature asphalt can also affect the adsorption performance of activated carbon. Because the high-temperature asphalt can react with the surface of activated carbon, the oxygen-containing functional groups on the surface of activated carbon are reduced, thereby reducing the adsorption capacity of activated carbon. In addition, high-temperature asphalt can also clog the pore structure on the surface of activated carbon, resulting in a decrease in the adsorption capacity of activated carbon.
Finally, high-temperature bitumen can also affect the thermal stability of activated carbon. Due to the large molecular weight of high-temperature asphalt, its thermal stability is poor, so after combining it with activated carbon, the thermal stability of activated carbon will be reduced. This is mainly because high-temperature asphalt will decompose and cross-link during the heating process, producing substances such as gases and free radicals, which will diffuse to the surface of the activated carbon, thereby reducing the thermal stability of the activated carbon.
In summary, the effects of high-temperature asphalt on activated carbon are mainly manifested in surface properties, adsorption properties and thermal stability. Therefore, in practical applications, it is necessary to choose the appropriate high-temperature asphalt and activated carbon according to the specific situation to achieve the best performance and effect.