info:eu-repo/semantics/article
Surface modifications of Volcanic Glasses (Perlites) by water vapor
Fecha
2003-12Registro en:
Abalos, Raúl Mauro; Erdmann, Eleonora; Destefanis, Hugo Alberto; Surface modifications of Volcanic Glasses (Perlites) by water vapor; Planta Piloto de Ingeniería Química; Latin American Applied Research; 33; 1; 12-2003; 59-62
0327-0793
1851-8796
CONICET Digital
CONICET
Autor
Abalos, Raúl Mauro
Erdmann, Eleonora
Destefanis, Hugo Alberto
Resumen
Hydrothermal treatments on expanded volcanic glasses (perlites) were studied. The main objective of this paper is to obtain an activated surface able to interact with specific chemical substances. The above mentioned treatment consists on exposing the glass surface to water vapor at temperatures over 250°C at the correspondent vapor pressure during different periods of time and for different size of particles. The glass surface modifications were studied by IR, DTA-TG and adsorption techniques. The grade of surface activation was tested by studying the chemical interaction with polysiloxane polymers.