The Effect of Milling on the Triboelectrification Properties of Literature review - 1

The Effect of Milling on the Triboelectrification Properties of Flurbiprofen Salts - Literature review Example This literature review seeks to investigate some of the electrostatic concepts as well as the potential effects of milling on the triboelectrification properties of Flurbiprofen salts. Electrostatics is a phenomenon which generally involves the build up of charges on the surfaces of particles and objects which are in contact with each other. One of the most fundamental equations commonly used in electrostatics is Coulombs law which effectively describe the force between any two point electric charges. According to Coulombs law, the magnitude of electrostatic force between any two point charges is dependent on the magnitude of each charge as well as the distance between the charges. The concept of work function generally refers to minimum energy (in electronvolts) required to remove an electron from a solid and transfer it to any point outside the surface of the solid. Work function represents the least amount of energy needed to get rid of the weakest electron from its location. Consequently, electrons are often moved to a function with the lower work function of the substance with a higher work function (Bailey, 1993). Based on these rules, Elajnaf’s group (2006) suggested a triboelectric sequence where the substance with the highest sequence, but with a lower work function would experience the highest level of electropositive charge when it came in contact with the substances in the lower sequence. Contact Potential difference is an important concept that can be used to measure the changes in work function of a particle surface. An electrostatic potential usually exists between any two dissimilar electrical materials (such as conductors and semiconductors with different electron work functions) which are brought into physical contact. According to Elajnaf et al. (2006, p.102), contact surface characteristics such as surface texture, surface resistivity and contamination and particle properties such as surface resistivity, crystal properties and