TY - JOUR
T1 - Effect of dual modification on the spectroscopic, calorimetric, viscosimetric and morphological characteristics of corn starch
AU - Basilio-Cortés, Ulin Antobelli
AU - González-Cruz, Leopoldo
AU - Velazquez, Gonzalo
AU - Teniente-Martínez, Gerardo
AU - Gómez-Aldapa, Carlos Alberto
AU - Castro-Rosas, Javier
AU - Bernardino-Nicanor, Aurea
N1 - Publisher Copyright:
© 2019 by the authors.
PY - 2019/2/14
Y1 - 2019/2/14
N2 - The effect of dual modification of corn starch, including hydrolysis and succinylation, were evaluated through peak viscosity (PV) analysis, differential scanning calorimetry (DSC), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy. This dual modification was shown to increase the reaction efficiency (RE) and degree substitution (DS) compared with starches that were not subjected to acid hydrolysis pretreatment with a 44% and 45% increase respectively. After acid hydrolysis pretreatment, the surface of the corn starch granules exhibited exo-erosion and whitish points due to the accumulation of succinyl groups. The peak viscosity was reduced significantly with the acid hydrolysis pretreatment (between 3 and 3.5-fold decrease), which decreased the pasting temperature and peak time to 20 °C and 100 s respectively. In addition, the dual modification of corn starch altered certain thermal properties, including a reduction in the enthalpy of gelatinization (ΔH) and a higher range of gelatinization (around 6 °C), which may effectively improve industrial applications. Modifications on the FTIR spectra indicated that the dual modification affected the starch crystallinity, while the Raman spectra revealed that the dual modification disrupted the short-range molecular order in the starch. Rearrangement and molecular destabilization of the starch components promoted their granular amphiphilic properties.
AB - The effect of dual modification of corn starch, including hydrolysis and succinylation, were evaluated through peak viscosity (PV) analysis, differential scanning calorimetry (DSC), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy. This dual modification was shown to increase the reaction efficiency (RE) and degree substitution (DS) compared with starches that were not subjected to acid hydrolysis pretreatment with a 44% and 45% increase respectively. After acid hydrolysis pretreatment, the surface of the corn starch granules exhibited exo-erosion and whitish points due to the accumulation of succinyl groups. The peak viscosity was reduced significantly with the acid hydrolysis pretreatment (between 3 and 3.5-fold decrease), which decreased the pasting temperature and peak time to 20 °C and 100 s respectively. In addition, the dual modification of corn starch altered certain thermal properties, including a reduction in the enthalpy of gelatinization (ΔH) and a higher range of gelatinization (around 6 °C), which may effectively improve industrial applications. Modifications on the FTIR spectra indicated that the dual modification affected the starch crystallinity, while the Raman spectra revealed that the dual modification disrupted the short-range molecular order in the starch. Rearrangement and molecular destabilization of the starch components promoted their granular amphiphilic properties.
KW - Acid hydrolysis
KW - Corn starch
KW - Dual modification
KW - Succinylation
UR - http://www.scopus.com/inward/record.url?scp=85061620727&partnerID=8YFLogxK
U2 - 10.3390/polym11020333
DO - 10.3390/polym11020333
M3 - Artículo
AN - SCOPUS:85061620727
SN - 2073-4360
VL - 11
JO - Polymers
JF - Polymers
IS - 2
M1 - 333
ER -