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Open AccessArticle

One-Step Method for Preparing Dispersive Tea Polyphenol/Graphene Nanosheets Enhanced with Anticorrosion Performance

1
College of Chemistry and Chemical Engineering of Southwest Petroleum University, Chengdu 610500, China
2
Changqing Oilfield No. 3 Oil Harvesting Factory, Chongqing 750006, China
3
Research Institute of Natural Gas Technology, PetroChina Southwest Oil and Gasfield Company, Chengdu 610051, China
4
Chengdu Graphene Application Institute of Industrial Technology, Chengdu 611130, China
5
Research Institute of Petroleum Engineering, PetroChina Dagang Oilfield Company, Tianjin 300280, China
*
Authors to whom correspondence should be addressed.
Coatings 2019, 9(11), 731; https://doi.org/10.3390/coatings9110731
Received: 7 October 2019 / Revised: 28 October 2019 / Accepted: 31 October 2019 / Published: 5 November 2019
(This article belongs to the Section Corrosion, Wear and Erosion)
Water-dispersible and anticorrosion nanocomposites have attracted extensive attention. In this study, tea polyphenol (TP)/graphene (GE) was fabricated with a one-step route. The preparation and modification of graphene nanosheets was carried out by graphene employing tea polyphenols as reduction and functionalization reagents. Our study adopted a nontoxic reductant without an extra functionalization reagent. This method is convenient, inexpensive, and environmentally friendly. The final functionalized graphene nanosheets had a single-layer structure. For evaluating performance, Raman spectroscopy was adapted for evaluating π–π interactions between TP and graphene. Elemental and structural composition was analyzed using X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Sample morphology was characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Results indicated that the TP could effectively augment the dispersive performance of graphene in the solution. The durable anticorrosion capacity of the epoxy matrix noticeably increased after adding the appropriate amount of tea polyphenols–graphene (TPG) (0.3 wt.%). Electrochemical impedance spectroscopy (EIS) studies showed that the impedance of artificial defects was enhanced. The anticorrosion property was attributed to the uniform dispersion of graphene by adding TP. View Full-Text
Keywords: graphene (GE); tea polyphenols (TP); one-step route; nontoxic; TP/GE/epoxy nanocomposites; anticorrosion graphene (GE); tea polyphenols (TP); one-step route; nontoxic; TP/GE/epoxy nanocomposites; anticorrosion
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MDPI and ACS Style

Guo, Y.; Xiao, G.; Zhang, W.; Zhang, N.; Chen, C.; Fan, Y.; Li, H.; Liu, X.; He, Y. One-Step Method for Preparing Dispersive Tea Polyphenol/Graphene Nanosheets Enhanced with Anticorrosion Performance. Coatings 2019, 9, 731.

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