TY - JOUR
T1 - Study of spray drying of the Aloe vera mucilage (Aloe vera barbadensis Miller) as a function of its rheological properties
AU - Cervantes-Martínez, C. V.
AU - Medina-Torres, L.
AU - González-Laredo, R. F.
AU - Calderas, F.
AU - Sánchez-Olivares, G.
AU - Herrera-Valencia, E. E.
AU - Gallegos Infante, J. A.
AU - Rocha-Guzman, N. E.
AU - Rodríguez-Ramírez, J.
PY - 2014/3
Y1 - 2014/3
N2 - Spray Drying (SD) was used to obtain Aloe vera powder from fresh plants. The powder was reconstituted in an aqueous medium and its rheological properties, particle size distribution (PSD), thermal properties (differential scanning calorimetry, DSC), and morphology (scanning electron microscopy, SEM) were evaluated in order to find an alternative to natural gum to be used in the food industry. Rheological measurements were conducted at 25°C in aqueous concentrations of 3g/100mL and 6g/100mL. A 23 factorial design was used with three central points to evaluate yield, efficiency and the rheological properties of reconstituted powders, results were compared with a liophilized (FD) sample of A. vera mucilage. Experimental results showed that the shear viscosity decreased with the increase of the inlet air temperature and the speed of atomization, and it increased with increasing feed flow in SD. Additionally, most powders obtained in all treatments have an average particle diameter of ~10μm with a modal distribution (PSD). The best conditions of SD in order to obtain a good thickening agent were: 150°C inlet temperature, 1.5L/h feed rate and atomization speed of 275,000rpm, and with rheological properties very close to those of the FD sample. copy; 2013 Elsevier Ltd.
AB - Spray Drying (SD) was used to obtain Aloe vera powder from fresh plants. The powder was reconstituted in an aqueous medium and its rheological properties, particle size distribution (PSD), thermal properties (differential scanning calorimetry, DSC), and morphology (scanning electron microscopy, SEM) were evaluated in order to find an alternative to natural gum to be used in the food industry. Rheological measurements were conducted at 25°C in aqueous concentrations of 3g/100mL and 6g/100mL. A 23 factorial design was used with three central points to evaluate yield, efficiency and the rheological properties of reconstituted powders, results were compared with a liophilized (FD) sample of A. vera mucilage. Experimental results showed that the shear viscosity decreased with the increase of the inlet air temperature and the speed of atomization, and it increased with increasing feed flow in SD. Additionally, most powders obtained in all treatments have an average particle diameter of ~10μm with a modal distribution (PSD). The best conditions of SD in order to obtain a good thickening agent were: 150°C inlet temperature, 1.5L/h feed rate and atomization speed of 275,000rpm, and with rheological properties very close to those of the FD sample. copy; 2013 Elsevier Ltd.
KW - Aloe vera
KW - Mucilage
KW - Rheological properties
KW - Spray drying
KW - Viscoelasticity
UR - http://www.scopus.com/inward/record.url?scp=84888134347&partnerID=8YFLogxK
U2 - 10.1016/j.lwt.2013.09.026
DO - 10.1016/j.lwt.2013.09.026
M3 - Artículo
SN - 0023-6438
VL - 55
SP - 426
EP - 435
JO - LWT
JF - LWT
IS - 2
ER -