2021
María Montserrat Cruz-Benítez, Pablo Gónzalez-Morones, Ernesto Hernández-Hernández. José Roberto Villagómez-Ibarra, Javier Castro-Rosas, Esmeralda Rangel-Vargas, Heidi Andrea Fonseca-Florido, Carlos Alberto Gómez-Aldapa. Covalent functionalization of graphene oxide with fructose, starch, and micro-cellulose by sonochemistry. Polymers 2021, 13(4), 490; https://doi.org/10.3390/polym13040490
Abstract
In this work, we report the synthesis of graphene oxide (GO) nanohybrids with starch, fructose, and micro-cellulose molecules by sonication in an aqueous medium at 90 C and a short reaction time (30 min). The final product was washed with solvents to extract the nanohybrids and separate them from the organic molecules not grafted onto the GO surface. Nanohybrids were chemically characterized by Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy and analyzed by thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and X-ray diffraction (XRD). These results indicate that the ultrasound energy promoted a chemical reaction between GO and the organic molecules in a short time (30 min). The chemical characterization of these nanohybrids confirms their covalent bond, obtaining a grafting percentage above 40% the weight in these nanohybrids. This hybridization creates nanometric and millimetric nanohybrid particles. In addition, the grafted organic molecules can be crystallized on GO films. Interference in the ultrasound waves of starch hybrids is due to the increase in viscosity, leading to a partial hybridization of GO with starch
CARACTERIZACIÓN DEL ALMIDÓN DE DOS VARIEDADES DE SORGO DEL ESTADO DE TAMAULIPAS
Characterization of Main Anthocyanins Extracted from Pericarp Blue Corn by MALDI-ToF MS
EFECTO DEL EXTRACTO DE LA CEREZA EN LA REDUCCIÓN DE COLESTEROL.
AUMENTO DE LA ESTABILIDAD DEL COLOR DE EXTRACTOS DE ZARZAMORA MEDIANTE REACCIONES DE CONDENSACIÓN.
CALIDAD MICROBIOLÓGICA DE PALETAS BASE AGUA Y BASE LÁCTEA ELABORADAS EN EL ESTADO DE HIDALGO, MÉXICO
Chemical and Physicochemical Properties of Maize Starch After Industrial Nixtamalization
Sensory profile and Chemicals composition of Opuntia joconostle from Hidalgo, Mexico