Priscilla C. Veggi , Tahmasb Hatami , Leonardo F. Campos , Luciana P. Mazur , Luana E. do Carmo , Lucia H.I. Mei , Juliane Viganó
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引用次数: 0
Abstract
Renowned for its medicinal properties, barbatimão bark extract contains bioactive compounds susceptible to degradation, necessitating their safeguarding within a stable matrix for diverse biomedical applications. This study investigates using high-pressure liquid impregnation (HPLI) to load barbatimão extract into biopolymeric membranes at 30, 45, and 60 °C, and 11 MPa. HPLI combines the simplicity of direct immersion with improved mass transfer rates under high pressure. Biopolymeric membranes made from poly(butylene succinate) (PBS), poly(lactic acid) (PLA), and Cloisite 20 A (C20A) in a 50/45/5 (v/v) composition were created using electrospinning. Comparative analysis with conventional methods, along with evaluation of impregnated membrane properties using SEM, FTIR, and thermogravimetric analysis, demonstrated the effectiveness of HPLI. HPLI yielded markedly higher phenolic compound loadings, peaking at 43.79 mg ETA/g membrane at 11 MPa and 45 °C over 6 h, compared to 25.44 mg ETA/g membrane with conventional impregnation at ambient pressure and 45 °C over the same duration.
期刊介绍:
The Journal of Supercritical Fluids is an international journal devoted to the fundamental and applied aspects of supercritical fluids and processes. Its aim is to provide a focused platform for academic and industrial researchers to report their findings and to have ready access to the advances in this rapidly growing field. Its coverage is multidisciplinary and includes both basic and applied topics.
Thermodynamics and phase equilibria, reaction kinetics and rate processes, thermal and transport properties, and all topics related to processing such as separations (extraction, fractionation, purification, chromatography) nucleation and impregnation are within the scope. Accounts of specific engineering applications such as those encountered in food, fuel, natural products, minerals, pharmaceuticals and polymer industries are included. Topics related to high pressure equipment design, analytical techniques, sensors, and process control methodologies are also within the scope of the journal.