TY - JOUR
T1 - Rheological performance of film-forming solutions made from plasma-modified starches with different amylose/amylopectin content
AU - Hernandez-Perez, Pablo
AU - Flores-Silva, Pamela C.
AU - Velazquez, Gonzalo
AU - Morales-Sanchez, Eduardo
AU - Rodríguez-Fernández, Oliverio
AU - Hernández-Hernández, Ernesto
AU - Mendez-Montealvo, Guadalupe
AU - Sifuentes-Nieves, Israel
N1 - Publisher Copyright:
© 2020
PY - 2021/3/1
Y1 - 2021/3/1
N2 - Normal and high amylose corn starches were modified using HMDSO plasma at different time treatments. Changes in functional properties of starch granule, film-forming solutions (FFS) and films were investigated. SEM analysis revealed HMDSO coating deposition on the granule surface, which limited the amylopectin leach out from the granules to the continuous matrix, affecting the rheological properties of the FFS. The amylopectin restriction resulted in a low reinforcement of the network decreasing the viscosity as indicated by n and k values. Also, a gel-like behavior (G′ > G″) was observed when the amylose and time treatment increased, suggesting that the matrix becomes less elastic with softer entanglement. This behavior was confirmed by creep test and Burger model parameters. The plasma treatments allowed obtaining FFS with low viscosity, suitable for developing soft and hydrophobic films with low flexibility, as indicated by the decrease of the maximum stress, Hencky strain and permeance values.
AB - Normal and high amylose corn starches were modified using HMDSO plasma at different time treatments. Changes in functional properties of starch granule, film-forming solutions (FFS) and films were investigated. SEM analysis revealed HMDSO coating deposition on the granule surface, which limited the amylopectin leach out from the granules to the continuous matrix, affecting the rheological properties of the FFS. The amylopectin restriction resulted in a low reinforcement of the network decreasing the viscosity as indicated by n and k values. Also, a gel-like behavior (G′ > G″) was observed when the amylose and time treatment increased, suggesting that the matrix becomes less elastic with softer entanglement. This behavior was confirmed by creep test and Burger model parameters. The plasma treatments allowed obtaining FFS with low viscosity, suitable for developing soft and hydrophobic films with low flexibility, as indicated by the decrease of the maximum stress, Hencky strain and permeance values.
KW - Creep-recovery behavior
KW - Film-forming solutions
KW - HMDSO coating
KW - Plasma
KW - Viscoelasticity
UR - http://www.scopus.com/inward/record.url?scp=85095804474&partnerID=8YFLogxK
U2 - 10.1016/j.carbpol.2020.117349
DO - 10.1016/j.carbpol.2020.117349
M3 - Artículo
C2 - 33436191
AN - SCOPUS:85095804474
SN - 0144-8617
VL - 255
JO - Carbohydrate Polymers
JF - Carbohydrate Polymers
M1 - 117349
ER -