The Properties of an Aluminum/UV-Curable, Infrared, Low-Emissivity Coating Modified by Nano-Silica Slurry
Abstract
:1. Introduction
2. Materials and Methods
2.1. Experimental Materials
2.2. Preparation of Coatings
2.3. Testing and Characterization
3. Results and Discussion
3.1. Analysis of Orthogonal Analysis of Aluminum/UV-Curable Coating
3.2. The Effect of UV-Curing Time on Glossiness
3.3. The Influence of UV-Curing Time on the Infrared Emissivity
3.4. The Influence of UV-Curing Time on the Color Difference
3.5. The Influences of UV-Curing Time on Hardness and Roughness
3.6. The Influences of UV-Curing Time on Adhesion and Impact Strength
3.7. The Effect of UV-Curing Time on Corrosion Resistance
3.8. The Effect of Al Powder Concentration on the Property
4. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Sample | Al (%) | Nano-Silica Slurry (%) | UV-Curing Time (s) |
---|---|---|---|
1# | 20.0 | 2.0 | 120.0 |
2# | 20.0 | 10.0 | 360.0 |
3# | 40.0 | 2.0 | 360.0 |
4# | 40.0 | 10.0 | 120.0 |
Sample | Al (g) | Nano-Silica Slurry (g) | KH560 (g) | UV-Curable Varnish (g) | UV-Curing Time (s) |
---|---|---|---|---|---|
1# | 20.0 | 2.0 | 2.0 | 76.0 | 120.0 |
2# | 20.0 | 10.0 | 2.0 | 68.0 | 360.0 |
3# | 40.0 | 2.0 | 2.0 | 56.0 | 360.0 |
4# | 40.0 | 10.0 | 2.0 | 48.0 | 120.0 |
5# | 10.0 | 2.0 | 2.0 | 86.0 | 180.0 |
6# | 20.0 | 2.0 | 2.0 | 76.0 | 180.0 |
7# | 30.0 | 2.0 | 2.0 | 66.0 | 180.0 |
8# | 40.0 | 0 | 0 | 60.0 | 180.0 |
9# | 40.0 | 2.0 | 2.0 | 56.0 | 30.0 |
10# | 40.0 | 2.0 | 2.0 | 56.0 | 60.0 |
11# | 40.0 | 2.0 | 2.0 | 56.0 | 120.0 |
12# | 40.0 | 2.0 | 2.0 | 56.0 | 180.0 |
13# | 40.0 | 2.0 | 2.0 | 56.0 | 240.0 |
14# | 40.0 | 2.0 | 2.0 | 56.0 | 300.0 |
Sample | Al (%) | Nano-Silica Slurry (%) | UV-Curing Time (s) | Glossiness (%) |
---|---|---|---|---|
1# | 20.0 | 2.0 | 120.0 | 12.0 ± 0.3 |
2# | 20.0 | 10.0 | 360.0 | 9.0 ± 0.3 |
3# | 40.0 | 2.0 | 360.0 | 9.0 ± 0.2 |
4# | 40.0 | 10.0 | 120.0 | 10.0 ± 0.1 |
K1 | 10.5 ± 0.1 | 10.5 ± 0.3 | 11.0 ± 0 | - |
K2 | 9.5 ± 0.2 | 9.5 ± 0.3 | 9.0 ± 0.2 | - |
R | 1.0 ± 0 | 1.0 ± 0 | 2.0 ± 0 | - |
Sample | Al (%) | Nano-Silica Slurry (%) | UV-Curing Time (s) | Infrared Emissivity |
---|---|---|---|---|
1# | 20.0 | 2.0 | 120.0 | 0.203 ± 0.003 |
2# | 20.0 | 10.0 | 360.0 | 0.257 ± 0.007 |
3# | 40.0 | 2.0 | 360.0 | 0.221 ± 0.008 |
4# | 40.0 | 10.0 | 120.0 | 0.185 ± 0.006 |
K1 | 0.230 ± 0.008 | 0.212 ± 0.009 | 0.194 ± 0.007 | - |
K2 | 0.203 ± 0.006 | 0.221 ± 0.003 | 0.239 ± 0.007 | - |
R | 0.027 ± 0.006 | 0.009 ± 0 | 0.045 ± 0.001 | - |
Curing Time (s) | L | a* | b* | L’ | a*’ | b*’ | ΔE |
---|---|---|---|---|---|---|---|
30 | 25.9 ± 0.6 | 5.2 ± 0.3 | −3.1 ± 0 | 78.6 ± 2.9 | 2.5 ± 0.2 | −4.3 ± 0.1 | 52.8 ± 1.0 |
60 | 25.9 ± 0.6 | 5.2 ± 0.3 | −3.1 ± 0 | 77.2 ± 1.0 | 2.2 ± 0.2 | −4.3 ± 0.1 | 51.4 ± 1.6 |
120 | 25.9 ± 0.6 | 5.2 ± 0.3 | −3.1 ± 0 | 76.3 ± 2.4 | 2.5 ± 0.2 | −4.4 ± 0.1 | 50.5 ± 1.5 |
180 | 25.9 ± 0.6 | 5.2 ± 0.3 | −3.1 ± 0 | 76.1 ± 1.8 | 2.5 ± 0.2 | −1.5 ± 0 | 50.3 ± 1.4 |
240 | 25.9 ± 0.6 | 5.2 ± 0.3 | −3.1 ± 0 | 75.8 ± 1.9 | 2.3 ± 0.2 | −5.3 ± 0.2 | 50.0 ± 1.4 |
300 | 25.9 ± 0.6 | 5.2 ± 0.3 | −3.1 ± 0 | 75.7 ± 1.8 | 2.3 ± 0.2 | −0.6 ± 0 | 49.9 ± 1.2 |
360 | 25.9 ± 0.6 | 5.2 ± 0.3 | −3.1 ± 0 | 75.0 ± 1.7 | 1.4 ± 0.2 | −3.9 ± 0.1 | 49.3 ± 1.1 |
Curing Time (s) | Ecorr (V) | Rp (Ω·cm2) | Icorr (A·cm−2) | βa (mV·dec−1) | βc (mV·dec−1) |
---|---|---|---|---|---|
30 | −0.745 ± 0 | 133.2 ± 2.4 | 2.337 × 10−4 ± 0 | 99.69 ± 3.1 | 254.26 ± 8.4 |
180 | −0.748 ± 0 | 171.1 ± 4.6 | 1.802 × 10−4 ± 0 | 124.86 ± 4.0 | 164.07 ± 5.6 |
Curing Time (s) | L | a* | b* | L’ | a*’ | b*’ | ΔE | Glossiness before Test (%) | Glossiness after Test (%) | Loss of Glossiness (%) |
---|---|---|---|---|---|---|---|---|---|---|
30 | 78.6 ± 2.9 | 2.5 ± 0.2 | −4.3 ± 0.1 | 72.6 ± 2.5 | 2.4 ± 0.1 | −0.9 ± 0 | 6.9 ± 0.3 | 11.1 ± 0.2 | 3.4 ± 0.1 | 7.7 ± 0.2 |
180 | 76.1 ± 1.8 | 2.5 ± 0.2 | −1.5 ± 0 | 75.4 ± 2.1 | 2.1 ± 0 | −0.9 ± 0 | 1.0 ± 0 | 10.1 ± 0.1 | 3.6 ± 0.1 | 6.5 ± 0.2 |
Al (%) | Nano-Silica Slurry (%) | UV-Curing Time (s) | Glossiness (%) | Infrared Emissivity |
---|---|---|---|---|
10.0 | 2.0 | 180.0 | 13.0 ± 0.2 | 0.468 ± 0 |
20.0 | 2.0 | 180.0 | 11.8 ± 0.5 | 0.310 ± 0 |
30.0 | 2.0 | 180.0 | 11.2 ± 0.3 | 0.275 ± 0 |
40.0 | 2.0 | 180.0 | 10.1 ± 0.1 | 0.106 ± 0 |
40.0 | 0 | 180.0 | 54.0 ± 1.6 | 0.118 ± 0 |
Coating | Filler Mass Fraction (%) | Emissivity | Glossiness (%) | Adhesion (Level) | Impact Resistance (N·cm−1) |
---|---|---|---|---|---|
Epoxy-lacquer/Al | 30 | 0.065 | 5.7 | 1 | 500 |
PU/Cu | 50 | 0.100 | 45.2 | 3 | 200 |
PU/(ball-milled Ag–Cu) | 50 | 0.129 | 35.6 | 3 | 200 |
PU/Al | 40 | 0.068 | 38.3 | 1 | 400 |
Al/waterborne arcylic coating | 30 | 0.113 | 7.7 | 0 | 150 |
Al/UV modified by nano-silica slurry | 40 | 0.106 | 10.1 | 1 | 400 |
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Yan, X.; Chang, Y.; Qian, X. The Properties of an Aluminum/UV-Curable, Infrared, Low-Emissivity Coating Modified by Nano-Silica Slurry. Coatings 2020, 10, 382. https://doi.org/10.3390/coatings10040382
Yan X, Chang Y, Qian X. The Properties of an Aluminum/UV-Curable, Infrared, Low-Emissivity Coating Modified by Nano-Silica Slurry. Coatings. 2020; 10(4):382. https://doi.org/10.3390/coatings10040382
Chicago/Turabian StyleYan, Xiaoxing, Yijuan Chang, and Xingyu Qian. 2020. "The Properties of an Aluminum/UV-Curable, Infrared, Low-Emissivity Coating Modified by Nano-Silica Slurry" Coatings 10, no. 4: 382. https://doi.org/10.3390/coatings10040382