Operation parameters of alpaca fiber dyeing with supercritical fluid

Orcón Basilio B.G.; Verástegui Cholán D.R.; Tito Silva M.E.; Huayta Socantaype F.V.; Sedano Malpartida J.L.; Figueroa Flores S.M.; Mark Trujillo Navarro S.; Carranza López E.V. · Journal of Supercritical Fluids (2025) · DOI: 10.1016/j.supflu.2024.106432

Resumen

Supercritical carbon dioxide (SC-CO2) was used as an alternative method of dyeing alpaca fiber. This study analyzes the colorfastness to laundering as a function of operating parameters. The fiber was subjected to a pretreatment (Impregnation), where it was soaked in an acidulated solution of Nylosan Yellow N-3RL dye, squeezed through a padder roller and then dyed in the SC-CO2 system. Dye concentrations of 4.228 × 10−4 g/ml and 13.032 × 10-4 g/ml were tested for pretreatment and the dyeing process was analyzed using a factorial design with variables: pressure (100 and 350 bar), temperature (60 and 90°C) and time (30 and 120 min). The colorfastness to laundering reached 4.5 on the gray scale at 13.032 × 10–4 g/ml and temperature significantly influenced the process (p-value=0.038). Colorfastness to laundering of 4 at 100 bar, 90°C and 30 min was achieved.

Instituciones: Universidad Nacional de Ingeniería