Deposition of Zinc Oxide Coatings on Wood Surfaces Using the Solution Precursor Plasma Spraying Process
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Coating Deposition
2.3. Characterization
3. Results and Discussion
3.1. Characterization of Coatings by SEM
3.2. Characterization of Coatings by AFM
3.3. Characterization of Coatings by FTIR
3.4. Characterization of Coatings on Wood by XPS
3.5. Contact Angle Measurements
3.6. UV Protection Test
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Element | Assignment | Peak Position (eV) | Peak Area (%) | Atomic Percentage |
---|---|---|---|---|
Zn | Zn–O | 1021.21 | 41.1 | 7.1 |
Zn(OH)2 | 1022.18 | 58.9 | 10.2 | |
O | Zn–O | 530.75 | 15.9 | 7.1 |
Zn(OH)2 | 531.72 | 51.1 | 22.9 | |
C–O | 532.78 | 28.5 | 12.8 | |
C-O-C | 533.79 | 4.5 | 2.0 | |
C | C–C/C–H | 284.55 | 45.5 | 17.1 |
C–O/C–O–C | 285.66 | 36.6 | 13.8 | |
O–C=O | 288.52 | 17.9 | 6.7 | |
N | N2 | 398 | - | 0.26 |
NO2 | 403 | |||
NO3 | 406 |
Deposition Scan Speed | Precursor Concentration | 14 L/min One Pass | 14 L/min Two Passes | 17 L/min One Pass | 17 L/min Two Passes |
---|---|---|---|---|---|
60 mm/s | 0.5 M | 2.3 | 2.6 | 2.7 | 3.2 |
1.1 M | 3.6 | 5.1 | 3.9 | - | |
40 mm/s | 1.1 M | 4.9 | 7.3 | 5.6 | - |
1.8 M | 7.6 | 10.2 | 6.4 | 12.2 |
Sample | ΔL* | Δa* | Δb* | ΔE* | Protection Efficiency |
---|---|---|---|---|---|
Uncoated wood | −4.12 ± 0.52 | 1.39 ± 0.47 | 7.10 ± 0.42 | 8.34 ± 0.18 | - |
c = 1.1 M; Qair = 14 L/min; v = 40 mm/s; 1 pass | −2.72 ± 0.43 | 1.17 ± 0.69 | 6.02 ± 0.59 | 6.74 ± 0.67 | 19% |
c = 1.1 M; Qair = 14 L/min; v = 40 mm/s; 2 passes | −2.39 ± 0.27 | 1.35 ± 0.42 | 5.48 ± 0.70 | 6.16 ± 0.52 | 26% |
c = 1.1 M; Qair = 17 L/min; v = 40 mm/s; 1 pass | −2.68 ± 0.05 | 1.33 ± 0.25 | 5.67 ± 0.32 | 6.41 ± 0.21 | 23% |
c = 1.8 M; Qair = 17 L/min; v = 40 mm/s; 1 pass | −1.31 ± 0.37 | 0.37 ± 0.53 | 5.31 ± 0.11 | 5.51 ± 0.08 | 34% |
c = 1.8 M; Qair = 17 L/min; v = 30 mm/s; 1 pass | −1.08 ± 0.75 | 0.49 ± 0.76 | 5.04 ± 0.68 | 5.25 ± 0.58 | 37% |
c = 1.8 M; Qair = 14 L/min; v = 30 mm/s; 3 passes | 0.05 ± 1.62 | −0.18 ± 0.54 | 2.95 ± 0.09 | 3.19 ± 0.03 | 61% |
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Jnido, G.; Ohms, G.; Viöl, W. Deposition of Zinc Oxide Coatings on Wood Surfaces Using the Solution Precursor Plasma Spraying Process. Coatings 2021, 11, 183. https://doi.org/10.3390/coatings11020183
Jnido G, Ohms G, Viöl W. Deposition of Zinc Oxide Coatings on Wood Surfaces Using the Solution Precursor Plasma Spraying Process. Coatings. 2021; 11(2):183. https://doi.org/10.3390/coatings11020183
Chicago/Turabian StyleJnido, Ghiath, Gisela Ohms, and Wolfgang Viöl. 2021. "Deposition of Zinc Oxide Coatings on Wood Surfaces Using the Solution Precursor Plasma Spraying Process" Coatings 11, no. 2: 183. https://doi.org/10.3390/coatings11020183