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/pmcbyz94
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Raman spectroscopygraphene oxide nanosheetspartial reductionpolyurethane matrixwater-based polyurethane dispersion
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Abstract (AI)
Mechanically strong and thermally stable films obtained from a water-based polyurethane (PU) dispersion with small (0.1–1.5 wt.%) additions of graphene oxide nanosheet (GO) were studied through elemental analysis, X-ray photoelectron spectroscopy, differential thermogravimetry, and Raman spectroscopy. Moreover, the depletion of near-surface layers in nitrogen was presented for all the samples under study. It was found that the introduction of GO into a PU matrix was ac-companied by a partial reduction of graphene oxide nanosheet and an increase in the concentra-tion of defects in its structure.
Key Findings
1
All studied samples showed depletion of nitrogen in near-surface layers.
2
Graphene oxide incorporation increased the concentration of structural defects in the nanosheets.
3
Introducing graphene oxide into the polyurethane matrix caused partial reduction of the nanosheets.
4
The polyurethane–graphene oxide films were characterized using elemental analysis, X-ray photoelectron spectroscopy, differential thermogravimetry, and Raman spectroscopy.
5
Water-based polyurethane films containing 0.1–1.5 wt.% graphene oxide nanosheets exhibit high mechanical strength and thermal stability.
Research Object
Graphene oxide nanosheets in a water-based polyurethane matrix
Research Subject
Partial reduction and defect formation in graphene oxide nanosheets, together with near-surface nitrogen depletion, upon incorporation into polyurethane films
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2023-01-30
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