On the State of Graphene Oxide Nanosheet in a Polyurethane Matrix
О состоянии нанолистов оксида графена в полиуретановой матрице
2023-01-30
SCID: 54.1/vny3bftx
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PU/GO composite filmsRaman spectroscopygraphene oxide nanosheetspartial reductionpolyurethane matrix
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Abstract (AI)
Thermally stable films were obtained from a water-based polyurethane (PU) dispersion with small (0.1–1.5 wt.%) additions of graphene oxide (GO). The films were studied through elemental analysis, X-ray photoelectron spectroscopy, differential thermogravimetry, and Raman spectroscopy. It was found that the introduction of GO into a PU matrix was accompanied by a partial reduction in graphene oxide nanosheet and an increase in the concentration of defects in GO structure. It has been also established that the [C/N]at ratio in the near-surface layer of PU/GO composite films grows with an increase in the content of graphene oxide in the composite films.
Key Findings
1
Graphene oxide incorporation increased the concentration of structural defects in the graphene oxide.
2
Introducing graphene oxide into the polyurethane matrix partially reduced the graphene oxide nanosheets.
3
The near-surface atomic C/N ratio of polyurethane/graphene oxide composite films increased with graphene oxide content.
4
Thermally stable films were produced from water-based polyurethane dispersion containing 0.1–1.5 wt.% graphene oxide.
Research Object
Graphene oxide nanosheets dispersed in a water-based polyurethane matrix
Research Subject
The state and composition changes of graphene oxide in polyurethane/graphene oxide composite films, including partial reduction, defect formation, and the dependence of near-surface [C/N]at ratio on graphene oxide content
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2023-01-30
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