Effects of coconut oil concentration as a plasticizer and Yucca schidigera extract as a surfactant in the preparation of extruded corn starch films

Abstract

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.

Effect of Opuntia ficus‐indica mucilage in the ecological extraction, drying, and storage of eggplant anthocyanins

“…When the anthocyanin is present, the number of crosslinks between sugar chains decreases, causing a drop in viscosity, as observed in flow curves too. Similar results are observed by other authors for corn starch with surfactants (coconut oil) and chia mucilage, in which there is a competition in the interactions that occur between components (Capitani et al ; Gutiérrez et al ).…”

“…K and n values were obtained from the corresponding linear regressions, as well as R 2 . R 2 ≥ 0.98 indicates that the adjustment to the model was good (see Table ), as it was proposed for mucilage flaxseed (Wu, Li, Wang, Zhou, & Mao, ) and suspension of corn starch in water (Gutiérrez, Nuñez‐Santiago, Romero‐Bastida, & Martínez‐Bustos, ). The value of K for the mucilage is higher compared to the mucilage anthocyanin system, because the mucilage is composed of sugar chains with crosslinks among themselves.…”

Plasticizing effect of coconut oil on morphological, mechanical, thermal, rheological, barrier, and optical properties of poly(lactic acid): A promising candidate for food packaging

“…Coconut oil has the potential as an alternative plasticizer in the polymer industry. It is a recognized fact that oil has more fatty acids and can serve as a good plasticizer even in small amounts . CO is plant‐based oil that comes from the dried coconut kernels (60%–65% oil content) and has a yellowish haze with a coconut aroma .…”

“…It is a recognized fact that oil has more fatty acids and can serve as a good plasticizer even in small amounts . CO is plant‐based oil that comes from the dried coconut kernels (60%–65% oil content) and has a yellowish haze with a coconut aroma . CO contains mostly medium chain (C 6–18 ) saturated fatty acids (caproic to stearic) in the form of triglycerides where lauric acid (48.4%) and myristic acid (18.43%) are in bulk .…”

Radiation Influence on Edible Materials

“…However, they can often be functionalized with carboxyl groups, phosphate groups and/or sulfuric ester groups, and the combination of plasticizers and surfactants can bring the enhancement of properties of the starch films [17,18].…”