1. Colloid Chemistry Group, Chemistry Institute, Universidade Federal de Alfenas (UNIFAL-MG), Rua Gabriel Monteiro da Silva, 700, 37130-000 Alfenas, Minas Gerais Brazil
2. Macromolecules and
Surfactantes Group, Chemistry Department, Universidade Federal do Espírito Santo (UFES), 29075-910, Vitória, Espírito Santo Brazil