Effects of Mixed Microcapsules in Different Proportions on Aging Resistance and Self-Healing Properties of Waterborne Coatings for Tilia europaea L
Abstract
:1. Introduction
2. Experimental Section
2.1. Materials
2.2. Methods
- (1)
- Preparation of melamine/RHP-coated shellac microcapsules
- (2)
- Preparation of self-healing waterborne coating
2.3. Testing and Characterization
3. Results and Discussion
3.1. Morphology and Chemical Composition Analysis of Microcapsules with Different Contents of RHP
3.1.1. Morphology Characterization of Microcapsules
3.1.2. Infrared Spectra Testing
3.2. Optical and Mechanical Properties Analysis
3.2.1. Chromatism
3.2.2. Gloss
3.2.3. Mechanical Properties
3.2.4. Microstructure
3.3. Aging Resistance Performance Analysis
3.3.1. Chromatism
3.3.2. LLR
3.3.3. Microstructure
3.3.4. Infrared Spectrum Analysis
3.4. Self-Healing Performance Analysis
3.5. Roughness Test of Waterborne Coating with Mixed Microcapsules
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Type | RHP Content (%) | RHP (g) | Melamine (g) | 37% Formaldehyde Solution (g) | Shellac (g) |
---|---|---|---|---|---|
A | 2.8 | 0.25 | 5.00 | 10.00 | 6.64 |
B | 5.5 | 0.50 | 5.00 | 10.00 | 6.83 |
C | 8.0 | 0.75 | 5.00 | 10.00 | 7.01 |
Coating Number (#) | Kind of Mixed Microcapsules | Mixing Ratio (%) | Mass of Microcapsules (g) | Mass of Primer (g) | Mass of Finish (g) | Mass of Waterborne Coatings (g) |
---|---|---|---|---|---|---|
1 | type A + type B | 1:1 | 0.12 | 1.88 | 2.00 | 4.00 |
2 | type B + type C | 1:1 | 0.12 | 1.88 | 2.00 | 4.00 |
3 | type A + type B + type C | 1:1:1 | 0.12 | 1.88 | 2.00 | 4.00 |
4 | type A | 1 | 0.12 | 1.88 | 2.00 | 4.00 |
5 | type B | 1 | 0.12 | 1.88 | 2.00 | 4.00 |
6 | type C | 1 | 0.12 | 1.88 | 2.00 | 4.00 |
Sample Number (#) | L1 | a1 | b1 | L2 | a2 | b2 | ΔL | Δa | Δb | ΔE |
---|---|---|---|---|---|---|---|---|---|---|
1 | 72.0 | 12.4 | 23.3 | 71.5 | 13.9 | 23.9 | −0.5 | 1.5 | 0.6 | 1.69 |
2 | 70.3 | 13.3 | 31.0 | 70.6 | 12.5 | 29.8 | 0.3 | −0.8 | −1.2 | 1.47 |
3 | 70.8 | 13.8 | 27.7 | 70.6 | 14.2 | 28.7 | −0.2 | 0.4 | 1.0 | 1.10 |
4 | 73.8 | 13.4 | 30.6 | 72.2 | 13.6 | 31.1 | −1.6 | 0.2 | 0.5 | 1.69 |
5 | 67.2 | 15.0 | 28.2 | 67.8 | 15.3 | 28.8 | 0.6 | 0.3 | 0.6 | 0.90 |
6 | 68.5 | 15.8 | 32.0 | 69.1 | 15.2 | 30.8 | 0.6 | −0.6 | −1.2 | 1.47 |
Sample Number (#) | Gloss at the Incident Angle of 20° (%) | Gloss at the Incident Angle of 60° (%) | Gloss at the Incident Angle of 85° (%) |
---|---|---|---|
1 | 12.3 | 32.7 | 37.5 |
2 | 11.1 | 29.8 | 35.1 |
3 | 16.8 | 40.0 | 48.8 |
4 | 14.5 | 40.6 | 46.1 |
5 | 19.3 | 43.0 | 55.4 |
6 | 8.3 | 27.8 | 29.4 |
Sample Number (#) | Adhesion | Hardness | Impact Resistance (kg·cm) | Elongation at Break (%) |
---|---|---|---|---|
1 | 0 | 4 H | 5 | 33.71 |
2 | 0 | 4 H | 10 | 26.05 |
3 | 0 | 4 H | 7 | 35.28 |
4 | 0 | 4 H | 5 | 28.62 |
5 | 0 | 4 H | 10 | 30.90 |
6 | 0 | 4 H | 10 | 23.59 |
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Xia, L.; Han, Y.; Yin, T.; Zhu, Y.; Yan, X.; Li, J. Effects of Mixed Microcapsules in Different Proportions on Aging Resistance and Self-Healing Properties of Waterborne Coatings for Tilia europaea L. Coatings 2024, 14, 1042. https://doi.org/10.3390/coatings14081042
Xia L, Han Y, Yin T, Zhu Y, Yan X, Li J. Effects of Mixed Microcapsules in Different Proportions on Aging Resistance and Self-Healing Properties of Waterborne Coatings for Tilia europaea L. Coatings. 2024; 14(8):1042. https://doi.org/10.3390/coatings14081042
Chicago/Turabian StyleXia, Lingran, Yan Han, Taiyu Yin, Ye Zhu, Xiaoxing Yan, and Jun Li. 2024. "Effects of Mixed Microcapsules in Different Proportions on Aging Resistance and Self-Healing Properties of Waterborne Coatings for Tilia europaea L" Coatings 14, no. 8: 1042. https://doi.org/10.3390/coatings14081042