Characterization of commercial graphene-based materials for application in thermoplastic nanocomposites

Synthesis of graphene oxide and graphene quantum dots from miscanthus via ultrasound-assisted mechano-chemical cracking method

“…Both samples show a highly ordered and oriented carbon structure, which is typical of graphene materials. Most GO sheets display a semi-transparent appearance with wrinkles and foldings around the edges, indicating high flexibility and low thickness, particularly below ten layers [51] . This suggests that the proposed method is effective in deriving GO from biomass.…”

Evaluation of the morphological, rheological, dynamic mechanical and mechanical characteristics of compatibilized graphene oxide/poly(ethylene terephthalate)/poly(butylene terephthalate) nanocomposites

“…In the GO spectrum, peaks are seen at 3360, 1722, 1584, 1238, and 1048 cm −1 show OH, C═O (carbonyl), C═C (alkenyl), epoxy and alkoxy CO stretching vibrations, respectively. [ 19 ] The compatibilizer Joncryl exhibited characteristic peaks at 1725 and 907 cm −1 that indicates C═O vibrations of the carboxyl group and COC of the epoxy group, respectively [ 16 ]…”

Graphene Oxide and Reduced Graphene Oxide

“…The peaks around 1400 cm -1 are associated with bending modes in C-(C=O)-C groups and the bands centered at 1025 cm -1 refer to the symmetric vibrations between carbon and oxygen atoms in C-O groups. Also, the bands of the region from 600 to 900 cm -1 of GO are attributed to the C-O binding modes of hydroxyl and epoxy groups, characteristic of their structure (LIMA et al, 2020). Despite the verification of bands compatible with rGO, the presence of a small number of functional groups in its structure indicates the partial reduction of graphene oxide, once it was observed the presence of bands associated with oxygen groups, such as the epoxy groups (C-O-C) in the band near 1220 cm -1 (MEHL et al, 2014).…”