LAUSR

Abstract A mango leaf extract (MLE) has been used in conjunction with supercritical CO2 to impregnate a polyester textile. MLE was produced using CO2/methanol (50%) at 120 bar and 100 °C. The extract presented antioxidant (3.28 ± 0.1 μg DPP/μg extract), bacteriostatic (4.53 mg/mL) and bactericidal (7.24 mg/mL) activities. The effects of impregnation conditions, i.e., depressurization (0.6, 1.1 and 25 bar/min), temperature (35 and 55 °C) and pressure (400 and 500 bar), were analyzed. The most favorable conditions for the total polyphenols loading were obtained at 500 bar, 55 °C and 25 bar/min. Under these conditions the highest bacterial growth inhibition was observed with the impregnated polyester; however, the highest antioxidant capacity (AAI = 4.04 ± 0.16) was observed on using the same pressure but a low temperature (35 °C). The effect that pressure and temperature had on the impregnation efficiency of the major impregnated polyphenols was also studied.