Supercritical fluid impregnation of phenolic compounds from passion fruit bagasse in corn starch aerogels: Phase behavior and effect of operation mode

• Published in: The Journal of supercritical fluids 2024-12, Vol.214, p.106387, Article 106387
• Main Authors: de Araujo, Erick Jarles Santos, Braga, Arthur Jessé Oliveira, Monteiro Filho, José Claudio Klier, Ndiaye, Papa Matar, Rodrigues, Rodney Alexandre Ferreira, Martínez, Julian
• Format: Article
• Language: English
• Subjects: Aerogels; Antioxidant capacity; Food by-products; Incorporation of phenolic compounds; Piceatannol
• ISSN: 0896-8446
• DOI: 10.1016/j.supflu.2024.106387

This work investigated the phase behavior of the system sc-CO2 + ethanolic extract of passion fruit bagasse (EEPFB) and the effect of operation modes on the supercritical fluid impregnation (SFI) of phenolic compounds from EEPFB in corn starch aerogels. The total reducing capacity, antioxidant capacity (FRAP and ORAC), piceatannol amount and SFI yield (%) were evaluated. Three of the four system compositions showed the formation of a solid phase. SFI in static mode provided the best TRC, FRAP, and ORAC results. There were no significant differences in the amount of piceatannol and yield (%). The nitrogen adsorption/desorption test possibly indicates the filling of the aerogel pores with EEPFB and images of the aerogel before and after SFI suggest the incorporation of phenolic compounds into the corn starch aerogels through precipitation. [Display omitted] •Phenolic compounds from EEPFB were incorporated into corn starch aerogels by SFI.•Three SFI operation modes (static, dynamic, and static/dynamic) were investigated.•Analysis of phase found the best system composition (sc-CO2 + EEPFB) for SFI.•Static mode SFI achieved higher ORAC and FRAP antioxidant capacity and TRC.