Synthesis of nanocomposite material through modification of graphene oxide by nanocellulose

Abstract

Intensive research of nanocomposites contributes to the development of new materials in the fields of medicine, nanoelectronics, energy, biotechnology, information technology. Therefore, the synthesis of new materials by modifying of graphene oxide (GO) with nanocellulose and the study of its properties are of great interest. In this study synthesized nanocomposite material by modifying of graphene oxide (GO) from activated carbon (BAU-A) in a 1:1 volume ratio with nanocellulose (NC) from hemp stems belonging to the annual plant, and their chemical structure was studied by FTIR and UV-spectroscopy. The results of the study showed the absorption of the etheric bond C = O in the UV spectrum at full length 243 nm. The IR spectrum showed all the new etheric bonds O = C - OH at a wavelength of 1625 cm-1. The average particle sizes of GO was 352 nm and NC was 470 nm in length and 80 nm in width. The SEM analysis indicating the NC as a contact layer between ultralow thicknesses of the GO layers. The XRD analysis indicated GO-NC composite film is a substance comprising GO and NC. According to the results, modification of graphene oxide showed that its scope can be expanded as much as possible.

Thermally Reduced Graphene Oxide Membranes From Local Kazakhstan Graphite “Ognevsky”

“…A slight increase in thickness RGO 150 °C (Figure 7 (b – cross section, 22,90 μm)) compared to the initial GO (Figure 7 (a – cross section, 21,16 μm)), is explained by the penetration of the heat flux into the interplanar distance, as a result of which the membrane swells due to the initial temperature effects. Then, in subsequent RGO samples, under the influence of temperature, the dimensions of the thickness and interplanar spacing of the membranes decreased [21–24,28,29,37–39] . As the temperature increases and as the release of water and functional groups, the specific surface of the RGO increases.…”

“…[7,[19][20][21][22][23][24]38,39] Thermal reduction of GO at different temperatures was carried out using the TGA method, which is the registration of changes in the mass of the sample, physical and chemical properties of materials depending on temperature. [19][20][21][22][23][24][37][38][39] To study the effect of temperature on the composition and structure of GO membranes, thermogravimetry of RGO samples was carried out in a flow tube in a stream of hydrogen at temperatures: 150 °C; 300 °C; 500 °C; 900 °C. The masses of these samples were measured before and after annealing, then the masses of the removed chemical functional groups of the reduced GO were calculated.…”

Synthesis of Composite Membrane Based on Graphene Oxide and Nanostarch

“…They were characterized by XRD diffraction peak detected from X-ray diffractogram. The 2θ = 10.5° corresponds to the characteristic peak of GO (001) lattice plane [16,21]. Additionally, in the GO/nanostarch membrane diffractogram exhibited the crystal plane of GO/nanostarch membrane at 2θ = 13°.…”

“…In the spectrum of GO obtained by Hammer's method, the OH group at 3250 cm −1 and 1650 cm −1 , the carbonyl and carboxyl C=O group at 1750 cm −1 , and the C=C bonds of the aromatic ring at 1450 cm −1 are observed. Vibration of epoxide functional groups at 1300 cm −1 C-O, 1050 cm −1 is characteristic of alkoxy bonds [16]. The nanostarch spectrum shows the spectrum of nanostarch at 2850 cm −1 CH2 band, 1430 cm −1 group assigned to a symmetric CH2 bending vibration, 1150 cm −1 CO band and at 898 cm −1 , assigned to C-O-C stretching [18].…”

“…Graphene oxide was synthesized based on the Hammers method used in the research [16]. In order to do this, a beaker with 1 g of graphite was placed in a container filled with ice at a temperature equal to 0 ºC, then 23 ml of 94% H2SO4 was poured, after that left for 15 min and was continuously stirred on a magnetic stirrer.…”