Charge build-up and dissipation at the solid-air interface
Fernando Galembeck

Mechanisms for charge build-up and dissipation on insulator surfaces are a source of disagreement in the literature and the lack of knowledge in this area has been the source of material and property losses, including importante explosions in industrial environments. Recent work revealed that water adsorption/dessorption at solid/gas interfaces may contribute to surface charging: acidic oxides acquire negative charge upon increasing humidity while basic oxides become positive. On the other hand, polymer tribocharging is now understood as the outcome of polymer chain rupture followed by charge transfer. Together, these results should contribute to the development of safer powder handling procedures as well as to the creation of new materials processing techniques.


Programa módulo 1