TY - JOUR
T1 - Influence of gelatinization process and HMDSO plasma treatment on the chemical changes and water vapor permeability of corn starch films
AU - Sifuentes-Nieves, Israel
AU - Neira-Velázquez, Guadalupe
AU - Hernández-Hernández, Ernesto
AU - Barriga-Castro, Enrique
AU - Gallardo-Vega, Carlos
AU - Velazquez, Gonzalo
AU - Mendez-Montealvo, Guadalupe
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/8/15
Y1 - 2019/8/15
N2 - In this study, surface, chemical, physicochemical and barrier properties of films treated with hexamethyldisiloxane (HMDSO) cold plasma were investigated. Normal and high amylose starches were gelatinized at different level to obtain films with different amount of free amylopectin. The obtained films were subjected to HMDSO plasma treatment. XPS analysis indicated chemical changes including substitution and crosslinking of the starch molecule, as reflected by the C–Si bond increasing and the C-OH bonds reduction on treated films. These changes modified the thermal transitions (Tm and ΔH). The highest amount of C–Si bonds was more noticeable in the TF50 film, suggesting a better interaction between active species of plasma and the free amylopectin released into the continuous phase of the film. Moreover, active species of plasma increased the crystallinity in all films. These results suggested that a higher helical packaging, crosslinking and hydrophobic blocking groups (C–Si) of starch molecules resulted in films with improved barrier performance against water molecules.
AB - In this study, surface, chemical, physicochemical and barrier properties of films treated with hexamethyldisiloxane (HMDSO) cold plasma were investigated. Normal and high amylose starches were gelatinized at different level to obtain films with different amount of free amylopectin. The obtained films were subjected to HMDSO plasma treatment. XPS analysis indicated chemical changes including substitution and crosslinking of the starch molecule, as reflected by the C–Si bond increasing and the C-OH bonds reduction on treated films. These changes modified the thermal transitions (Tm and ΔH). The highest amount of C–Si bonds was more noticeable in the TF50 film, suggesting a better interaction between active species of plasma and the free amylopectin released into the continuous phase of the film. Moreover, active species of plasma increased the crystallinity in all films. These results suggested that a higher helical packaging, crosslinking and hydrophobic blocking groups (C–Si) of starch molecules resulted in films with improved barrier performance against water molecules.
KW - Chemical bonds
KW - Cold plasma
KW - Crosslinking
UR - http://www.scopus.com/inward/record.url?scp=85066101873&partnerID=8YFLogxK
U2 - 10.1016/j.ijbiomac.2019.05.116
DO - 10.1016/j.ijbiomac.2019.05.116
M3 - Artículo
C2 - 31121235
AN - SCOPUS:85066101873
SN - 0141-8130
VL - 135
SP - 196
EP - 202
JO - International Journal of Biological Macromolecules
JF - International Journal of Biological Macromolecules
ER -