Influence of the Dispersion of Carbon Nanotubes on the Electrical Conductivity, Adhesion Strength, and Corrosion Resistance of Waterborne Polyurethane Composites
Abstract
:1. Introduction
2. Materials and Methods
2.1. Experimental Materials
2.2. Coating Preparation
2.3. Coating Characterization
2.3.1. Electrical Conductivity and Micro-Morphology Test
2.3.2. Adhesion Strength of Coatings and Fourier Transform Infrared Spectroscopy (FTIR) Test
2.3.3. Anticorrosion Test
3. Results and Discussion
3.1. Dispersion of MWCNTs and Electrical Conductivity of Composites
3.2. Adhesion Strength of the Composite and Its Molecular Structure
3.3. Corrosion Resistance Analysis
4. Conclusions
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Samples | Pure WPU | 0.3 wt % | 0.6 wt % | 0.9 wt % | 1.2 wt % | 1.5 wt % |
---|---|---|---|---|---|---|
Surface resistances (R), Ω | (7.2 ± 0.6) × 1014 | (1.3 ± 0.6) × 1010 | (1.8 ± 0.6) × 108 | (7.9 ± 0.6) × 106 | (5.6 ± 0.6) × 106 | (5.0 ± 0.6) × 106 |
Volume resistivities (ρ), Ω·cm | (4.1 ± 0.6) × 1012 | (7.4 ± 0.6) × 107 | (1.0 ± 0.6) × 106 | (4.5 ± 0.6) × 104 | (3.2 ± 0.6) × 104 | (2.9 ± 0.6) × 104 |
Coating thickness (d), cm | (57.5 ± 4) × 10−4 | (56.7 ± 4) × 10−4 | (58.0 ± 4) × 10−4 | (57.5 ± 4) × 10−4 | (56.6 ± 4) × 10−4 | (57.4 ± 4) × 10−4 |
Samples | I/A·cm−2 | EvsSCE/V | Corrosion Rate/mm·a−1 |
---|---|---|---|
0 wt % | 1.2798 × 10−6 | −0.4152 | 0.01509 |
0.3 wt % | 1.6068 × 10−6 | −0.4339 | 0.01895 |
0.6 wt % | 2.6547 × 10−6 | −0.6568 | 0.03131 |
0.9 wt % | 4.6074 × 10−6 | −0.6678 | 0.05433 |
1.2 wt % | 5.6721 × 10−6 | −0.6731 | 0.06689 |
1.5 wt % | 6.8898 × 10−6 | −0.6881 | 0.08125 |
Q235 steel substrate | 8.1188 × 10−5 | −0.6978 | 0.95722 |
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Wang, F.; Liu, X.; Cao, B.; Wang, X.; Dong, K. Influence of the Dispersion of Carbon Nanotubes on the Electrical Conductivity, Adhesion Strength, and Corrosion Resistance of Waterborne Polyurethane Composites. Coatings 2024, 14, 1108. https://doi.org/10.3390/coatings14091108
Wang F, Liu X, Cao B, Wang X, Dong K. Influence of the Dispersion of Carbon Nanotubes on the Electrical Conductivity, Adhesion Strength, and Corrosion Resistance of Waterborne Polyurethane Composites. Coatings. 2024; 14(9):1108. https://doi.org/10.3390/coatings14091108
Chicago/Turabian StyleWang, Fangfang, Xiangrong Liu, Bin Cao, Xiaobao Wang, and Kangjun Dong. 2024. "Influence of the Dispersion of Carbon Nanotubes on the Electrical Conductivity, Adhesion Strength, and Corrosion Resistance of Waterborne Polyurethane Composites" Coatings 14, no. 9: 1108. https://doi.org/10.3390/coatings14091108