INVESTIGADORES
BAUMLER erica Raquel
congresos y reuniones científicas
Título:
Performance of sunflower waxes recovered from oil tank settlings as oil structurant agents
Autor/es:
REDONDAS, CINTIA; GIACOMOZZI, ANABELLA; BAÜMLER, ERICA; CARELLI, AMALIA
Lugar:
St Louis
Reunión:
Encuentro; AOCS Annual Meetings, St Louis, USA, 2019; 2019
Institución organizadora:
AOCS
Resumen:
The performance of sunflower waxes (SW) recovered from oil tank settling as structuring agents in oleogels was evaluated. SW were recovered from oil tank settlings using hot hexane, and to purify the waxes, they were washed with cold hexane, room-temperature ethanol and filtered through diatomaceous earth. The SW were characterized through color, TLC, GC, polarized microscopy and DSC. A full factorial 32 design was applied to formulate the oleogels, the factors considered were the percentages of waxes (C=1.5, 2.5, 3.5% wt/wt) added to sunflower oil, and the gelling temperature (TG=5, 15, 25 °C). The response factors measured were texture and oil binding capacity (OBC). In addition, the microstructure of the oleogels was studied through optical and polarized light microscopy. The optimum and weakest conditions were characterized by their rheological behavior, color, DSC and SEM. SW was composed of esters between C40-C60 atoms; their color was slightly yellow (b*=1.76±0.21) with red components (a*=9.00±0.03) due to the presence of traces of phospholipids and carotenes, and presented high luminosity (L*=87.74±0.06). The melting and crystallization temperature were 77.64±0.93 °C and 72.69±0.36 °C, respectively. It was concluded that C was the most influential parameter, having a positive effect in the textural parameters and OBC. The optimum condition corresponded to C=3.5%, TG=5 °C and the weakest one to C=1.5%, TG=5 °C. In conclusion, it was verified that SW recovered from oil tank settlings can be used as structuring agents, and that the physicochemical characteristics of the oleogels depends mostly on the content of SW.