Effect of the Concentration of Pigment Slurry on the Film Performances of Waterborne Wood Coatings
Abstract
:1. Introduction
2. Experimental Materials and Methods
2.1. Experimental Materials
2.2. Preparation of the Pigment Slurry
2.3. Preparation of Coatings
2.4. Testing and Characterization
3. Results and Discussion
3.1. Effect of Pigment Slurry Concentration of Thermochromic Microcapsules on Optical Properties
3.2. Effect of Pigment Slurry Concentration of Thermochromic Microcapsules on Mechanical Properties
3.3. Effect of Pigment Slurry Concentration of Thermochromic Microcapsules on Chemical Resistance
3.4. Microstructure Analysis
3.5. Stability of Thermochromic of Coatings
4. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Concentration of Pigment Slurry (%) | Weight of Pigment Slurry (g) | Weight of Waterborne Coating (g) | Weight of Thermochromic Coating (g) |
---|---|---|---|
0 | 0 | 100.0 | 100.0 |
5.0 | 5.0 | 95.0 | 100.0 |
10.0 | 10.0 | 90.0 | 100.0 |
15.0 | 15.0 | 85.0 | 100.0 |
20.0 | 20.0 | 80.0 | 100.0 |
25.0 | 25.0 | 75.0 | 100.0 |
30.0 | 30.0 | 70.0 | 100.0 |
Concentration of Thermochromic Pigment Slurry (%) | 60° Gloss (%) |
---|---|
0 | 45.5 ± 0.8 |
5.0 | 40.9 ± 0.3 |
10.0 | 38.4 ± 0.5 |
15.0 | 37.2 ± 0.3 |
20.0 | 35.7 ± 1.0 |
25.0 | 33.2 ± 0.5 |
30.0 | 26.1 ± 0.6 |
Concentration of Thermochromic Pigment Slurry (%) | Impact Resistance (kg·cm) |
---|---|
0 | 5.0 ± 0.1 |
5.0 | 4.0 ± 0.1 |
10.0 | 4.0 ± 0.1 |
15.0 | 4.0 ± 0.1 |
20.0 | 4.0 ± 0.1 |
25.0 | 5.0 ± 0.1 |
30.0 | 6.0 ± 0.1 |
Concentration of Thermochromic Pigment Slurry (%) | NaCl | Detergent | Ethanol | Red Ink |
---|---|---|---|---|
0 | 0.8 ± 0 | 0.8 ± 0 | 1.0 ± 0 | 1.9 ± 0 |
5.0 | 1.1 ± 0 | 1.1 ± 0 | 1.0 ± 0 | 1.9 ± 0 |
10.0 | 1.8 ± 0 | 0.5 ± 0 | 0.7 ± 0 | 1.3 ± 0 |
15.0 | 1.0 ± 0 | 0.7 ± 0 | 1.2 ± 0 | 1.2 ± 0 |
20.0 | 0.9 ± 0 | 1.0 ± 0 | 1.0 ± 0 | 1.3 ± 0 |
25.0 | 1.2 ± 0 | 1.3 ± 0 | 1.0 ± 0 | 1.2 ± 0 |
30.0 | 0.7 ± 0 | 1.5 ± 0 | 1.3 ± 0 | 1.2 ± 0 |
Level | Degree of Discoloration | Color Difference |
---|---|---|
0 | no discoloration | ≤1.5 |
1 | very slight discoloration | 1.6–3.0 |
2 | slight discoloration | 3.1–6.0 |
3 | apparent discoloration | 6.1–9.0 |
4 | severe discoloration | 9.1–12.0 |
5 | complete discoloration | >12.0 |
Concentration of Thermochromic Pigment Slurry (%) | NaCl (level) | Detergent (level) | Ethanol (level) | Red Ink (level) |
---|---|---|---|---|
0 | 0 | 0 | 0 | 1 |
5.0 | 0 | 0 | 0 | 1 |
10.0 | 1 | 0 | 0 | 0 |
15.0 | 0 | 0 | 0 | 0 |
20.0 | 0 | 0 | 0 | 0 |
25.0 | 0 | 0 | 0 | 0 |
30.0 | 0 | 0 | 0 | 0 |
Sample | L* | a* | b* | C* | h* | ΔE* |
---|---|---|---|---|---|---|
18 °C | 67.7 ± 0 | 34.6 ± 0 | 26.0 ± 0 | 43.3 ± 0 | 36.9 ± 0 | – |
Three months at 18 °C | 67.5 ± 0 | 33.7 ± 0 | 27.2 ± 0 | 44.2 ± 0 | 41.2 ± 0 | 1.5 ± 0 |
30 °C | 74.4 ± 0 | 22.9 ± 0 | 26.6 ± 0 | 35.1 ± 0 | 49.2 ± 0 | – |
30 °C heating 24 h | 73.6 ± 0 | 23.9 ± 0 | 25.5 ± 0 | 36.0 ± 0 | 48.5 ± 0 | 1.7 ± 0 |
30 °C heating 48 h | 73.7 ± 0 | 23.8 ± 0 | 25.8 ± 0 | 34.2 ± 0 | 48.6 ± 0 | 1.4 ± 0 |
30 °C heating 72 h | 73.9 ± 0 | 22.2 ± 0 | 27.8 ± 0 | 36.4 ± 0 | 50.6 ± 0 | 1.5 ± 0 |
Sample | L* | a* | b* | C* | h* | ΔE* | Gloss (%) |
---|---|---|---|---|---|---|---|
Before ageing | 72.2 ± 0 | 14.1 ± 0 | 36.7 ± 0 | 39.3 ± 0 | 69.8 ± 0 | – | 37.2 ± 0 |
After ageing | 71.8 ± 0 | 14.7 ± 0 | 39.7 ± 0 | 42.3 ± 0 | 69.5 ± 0 | 3.1 ± 0 | 36.8 ± 0 |
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Yan, X.; Chang, Y.; Qian, X. Effect of the Concentration of Pigment Slurry on the Film Performances of Waterborne Wood Coatings. Coatings 2019, 9, 635. https://doi.org/10.3390/coatings9100635
Yan X, Chang Y, Qian X. Effect of the Concentration of Pigment Slurry on the Film Performances of Waterborne Wood Coatings. Coatings. 2019; 9(10):635. https://doi.org/10.3390/coatings9100635
Chicago/Turabian StyleYan, Xiaoxing, Yijuan Chang, and Xingyu Qian. 2019. "Effect of the Concentration of Pigment Slurry on the Film Performances of Waterborne Wood Coatings" Coatings 9, no. 10: 635. https://doi.org/10.3390/coatings9100635