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 120bar and 100°C. The extract presented antioxidant (3.28±0.1μg DPP/μg extract), bacteriostatic (4.53mg/mL) and bactericidal (7.24mg/mL) activities. The effects of impregnation conditions, i.e., depressurization (0.6, 1.1 and 25bar/min), temperature (35 and 55°C) and pressure (400 and 500bar), were analyzed. The most favorable conditions for the total polyphenols loading were obtained at 500bar, 55°C and 25bar/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.
Published Version
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