Eco-Friendly Waterborne Polyurethane Coating Modified with Ethylenediamine-Functionalized Graphene Oxide for Enhanced Anticorrosion Performance
Abstract
:1. Introduction
2. Results and Discussion
2.1. Characterization of GO
2.2. Dispersion of GO in the WPU Matrix
2.3. Evaluation of Chemical Interaction of GO with WPU Resin
2.4. Hydrophobicity Analysis
2.5. Evaluation of Anticorrosion Performance
3. Materials and Methods
3.1. Materials
3.2. Methods
3.2.1. Preparation of Graphene Oxide
3.2.2. Preparation of GO Waterborne Polyurethane Composite Coatings
3.2.3. Characterization
3.2.4. Electrochemical Characterization and UV/Condensation Exposure Test
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Sample | Ecorr/(V) vs. Ag|AgCl | icorr/(A cm−2) | Corrosion Rate (mm/Year) | η |
---|---|---|---|---|
WPU | −0.811 | 9.03 × 10−7 | 1.01 × 10−2 | - |
1.3-GO | −0.379 | 2.57 × 10−6 | 2.88 × 10−2 | - |
0.1-GO | −0.361 | 1.02 × 10−7 | 1.15 × 10−3 | 88.70% |
0.01-GO | −0.126 | 9.34 × 10−9 | 1.05 × 10−4 | 99.00% |
0.01-GO-EDA | −0.118 | 3.70 × 10−9 | 4.15 × 10−5 | 99.60% |
Ref. | Coating | Graphene Derivative | Concentration (wt%) | Application Method | Ecorr (V) | icorr (A cm−2) |
---|---|---|---|---|---|---|
[34] | Waterborne hydroxyl acrylic | WHAR MGO | 0.50 | Bar coater | −0.27 | 0.90 × 10−6 |
[35] | Epoxy | GO-PANI-PDA | - | Wire bar coater | −0.59 | 3.83 × 10−8 |
[36] | Waterborne epoxy | CMCS-rGO | 0.05 | Bar coater | −0.63 | 3.05 × 10−10 |
[18] | WPU | GO-PNNG | 0.05 | - | −0.06 | 4.98 × 10−10 |
[37] | Polyvinyl alcohol | GO-PVA-SiC | 10.00 | Spray | −0.45 | 1.22 × 10−6 |
[38] | Epoxy | PA-G-EP | 1.00 | Bar coater | −0.62 | 3.10 × 10−8 |
This work | WPU | GO-EDA | 0.01 | Blade coater | −0.12 | 3.70 × 10−9 |
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Aramayo, M.A.F.; Ferreira Fernandes, R.; Santos Dias, M.; Bozzo, S.; Steinberg, D.; Rocha Diniz da Silva, M.; Maroneze, C.M.; de Carvalho Castro Silva, C. Eco-Friendly Waterborne Polyurethane Coating Modified with Ethylenediamine-Functionalized Graphene Oxide for Enhanced Anticorrosion Performance. Molecules 2024, 29, 4163. https://doi.org/10.3390/molecules29174163
Aramayo MAF, Ferreira Fernandes R, Santos Dias M, Bozzo S, Steinberg D, Rocha Diniz da Silva M, Maroneze CM, de Carvalho Castro Silva C. Eco-Friendly Waterborne Polyurethane Coating Modified with Ethylenediamine-Functionalized Graphene Oxide for Enhanced Anticorrosion Performance. Molecules. 2024; 29(17):4163. https://doi.org/10.3390/molecules29174163
Chicago/Turabian StyleAramayo, Mariel Amparo Fernandez, Rafael Ferreira Fernandes, Matheus Santos Dias, Stella Bozzo, David Steinberg, Marcos Rocha Diniz da Silva, Camila Marchetti Maroneze, and Cecilia de Carvalho Castro Silva. 2024. "Eco-Friendly Waterborne Polyurethane Coating Modified with Ethylenediamine-Functionalized Graphene Oxide for Enhanced Anticorrosion Performance" Molecules 29, no. 17: 4163. https://doi.org/10.3390/molecules29174163