Journal of the Korean Society of Mineral and Energy Resources Engineers ISSN:2288-0291(Print) 2288-2790(Online) 한국자원공학회지

For high performance graphite powder, preferentially fine purification and ultrafine grinding as flaky type are needed and give some special function to the graphite surface by adsorption with functional materials. There are no functional groups on the surface of natural graphite, therefore, it is difficult to join with any other ions. In order to modify a surface property, it is neccessary to let graphite have some function on its surface by the adsorption of surfactant molecules. In this study, the adsorption properties of ABDM (Alkylbenzyldimethylammonium chloride(Benzalkonium chloride) on fine natural crystalline graphite particle in aqueous solution was investigated. The adsorption of ABDM on the graphite surface proceeds through two steps in different system. The first step is electrostatic adsorption. In this step, zeta potential close to zero and graphite surface changes hydrophobic. The second step is steric interaction between ABDM chains, as a result doublelayer is formed on graphite surface and occur to change of surface charge on it.