J. Phys. IV France 125 (2005) 613-615
Photoacoustic response in a multivariable dyeing process: Comparison between conventional aqueous and supercritical CO2 used for impregnating PET filmsL. Olenka1, A.F. Rubira2, A.N. Medina1, M.L. Baesso1 and A.C. Bento1
1 Departamento de Física, Universidade Estadual de Maringá, Av. Colombo 5790, Maringá-Paraná, 87020-900, Brazil
2 Departamento de Química, Universidade Estadual de Maringá, Av. Colombo 5790, Maringá-Paraná, 87020-900, Brazil
Photoacoustic (PA) spectroscopy is used to study impregnation of Poly (ethylene terephthalate) (PET). Films were produced in conventional aqueous bath (CAB) and supercritical carbon dioxide (SC-CO2) and impregnated with disperse dyes Blue 79 (DB 79) and Red 60 (DR 60). It was treated in different temperature, concentration and pressure, and PA intensities used as the response in the multivariate method (Factorial Planning - FP). Results pointed out the SC-CO2 process with DB 79 dye as more effective.
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