TY - JOUR
T1 - Effects of coconut oil concentration as a plasticizer and Yucca schidigera extract as a surfactant in the preparation of extruded corn starch films
AU - Gutiérrez, Miguel Chávez
AU - Del Carmen Nuñez-Santiago, Maria
AU - Romero-Bastida, Claudia Andrea
AU - Martinez-Bustos, Fernando
N1 - Publisher Copyright:
© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
PY - 2014/11/1
Y1 - 2014/11/1
N2 - In this study, extruded films of corn starch (CS) plasticized with coconut oil (CO) (as an alternative plasticizer to glycerol) in the presence of Yucca schidigera extract (YSE) as a surfactant were investigated. It was observed that corn starch films (CSF) plasticized with a lower concentration (15 wt%) of CO showed a better equilibrium of mechanical properties, a higher WVP (5.8 ± 0.2 × 10-9 g m-1 s-1 Pa-1) and percentage of elongation (8 ± 0.5), and a lower Young modulus (99 ± 8 MPa) than those with a higher amount of plasticizer. However, films with Yucca schidigera extract (YSE) as a surfactant showed a decrease in WVP (4.9 ± 0.2 × 10-9 g m-1 s-1 Pa-1), a lower Young modulus (61 ± 2 MPa) and an increase in the percentage of elongation (13 ± 0.4). In order to describe the viscoelastic properties before the extrusion processes in materials in water suspensions and after extrusion process in CSF, rheological and DMTA analysis were performed, showing consistent behaviors for both samples.
AB - In this study, extruded films of corn starch (CS) plasticized with coconut oil (CO) (as an alternative plasticizer to glycerol) in the presence of Yucca schidigera extract (YSE) as a surfactant were investigated. It was observed that corn starch films (CSF) plasticized with a lower concentration (15 wt%) of CO showed a better equilibrium of mechanical properties, a higher WVP (5.8 ± 0.2 × 10-9 g m-1 s-1 Pa-1) and percentage of elongation (8 ± 0.5), and a lower Young modulus (99 ± 8 MPa) than those with a higher amount of plasticizer. However, films with Yucca schidigera extract (YSE) as a surfactant showed a decrease in WVP (4.9 ± 0.2 × 10-9 g m-1 s-1 Pa-1), a lower Young modulus (61 ± 2 MPa) and an increase in the percentage of elongation (13 ± 0.4). In order to describe the viscoelastic properties before the extrusion processes in materials in water suspensions and after extrusion process in CSF, rheological and DMTA analysis were performed, showing consistent behaviors for both samples.
KW - Coconut oil
KW - Corn starch
KW - Plasticizers
KW - Surfactants
KW - Yucca schidigera extract
UR - http://www.scopus.com/inward/record.url?scp=84939420431&partnerID=8YFLogxK
U2 - 10.1002/star.201400062
DO - 10.1002/star.201400062
M3 - Artículo
SN - 0038-9056
VL - 66
SP - 1079
EP - 1088
JO - Starch/Staerke
JF - Starch/Staerke
IS - 11-12
ER -