1. Department of Chemical and Food Engineering; CTC; Federal University of Santa Catarina; Postal Box 476 88040-900 Florianópolis SC Brazil
2. Núcleo de Estudos em Sistemas Coloidais; Instituto de Tecnologia e Pesquisa; Av. Murilo Dantas 300 Aracaju 49032-490 SE Brazil
3. Department of Chemical Engineering; Federal University of Parana; 81.531-990 Curitiba PR Brazil