Cruz-Benítez María Montserrat, Gónzalez-Morones Pablo, Hernández-Hernández Ernesto, Villagómez-Ibarra José Roberto, Castro-Rosas Javier, Rangel-Vargas Esmeralda, Fonseca-Florido Heidi Andrea, Gómez-Aldapa Carlos Alberto
Instituto de Ciencias Básicas e Ingeniería, Universidad Autónoma del Estado de Hidalgo, Ciudad del Conocimiento, Carretera Pachuca-Tulancingo km 4.5, C.P. 42184 Mineral de la Reforma, Mexico.
Centro de Investigación en Química Aplicada (CIQA), Boulevard Enrique Reyna Hermosillo, No. 140, C.P. 25294 Saltillo, Mexico.
Polymers (Basel). 2021 Feb 4;13(4):490. doi: 10.3390/polym13040490.
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.
在本工作中，我们报道了通过在90℃的水介质中超声处理且反应时间较短（30分钟），合成氧化石墨烯（GO）与淀粉、果糖和微晶纤维素分子的纳米杂化物。用溶剂洗涤最终产物以提取纳米杂化物，并将其与未接枝到GO表面的有机分子分离。通过傅里叶变换红外光谱（FTIR）、X射线光电子能谱（XPS）和拉曼光谱对纳米杂化物进行化学表征，并通过热重分析（TGA）、扫描电子显微镜（SEM）和X射线衍射（XRD）进行分析。这些结果表明，超声能量在短时间（30分钟）内促进了GO与有机分子之间的化学反应。这些纳米杂化物的化学表征证实了它们的共价键，在这些纳米杂化物中获得了高于40%重量的接枝率。这种杂化产生了纳米级和毫米级的纳米杂化颗粒。此外，接枝的有机分子可以在GO薄膜上结晶。淀粉杂化物对超声波的干扰是由于粘度增加，导致GO与淀粉发生部分杂化。
