Review Article
Heat-Treated Wood as a Substrate for Coatings, Weathering of Heat-Treated Wood, and Coating Performance on Heat-Treated Wood
Table 2
Comparison of surface free energy of heat-treated (HT) and untreated wood samples.
| LW-AB approach | Substrate | γLW | γAB | γ+ | γ− | γtot | Temperature (°C) | Heat treatment | Reference |
| Beech untreated | 49.5 | 9.1 | 1.5 | 13.5 | 58.6 | | | [28] | Pine untreated | 46.4 | 8.2 | 1.1 | 15.8 | 54.8 | | Beech HT | 50.9 | 5 | 2.3 | 2.7 | 55.8 | 240 | Treatment under nitrogen | Pine HT | 50.7 | 1.5 | 0.8 | 0.7 | 52.2 | 240 | OWRK approach | Substrate | | | γS | Temperature (°C) | Heat treatment | Reference | Beech untreated | 38.7 | 13.9 | 52.6 | | | [25] | Beech HT | 39.9 | 6.8 | 46.7 | 190 | Treatment under vapor | Beech HT | 46.3 | 2.6 | 48.9 | 212 | Spruce untreated | 53.4 | 0.97 | 54.4 | | | [35] | Spruce HT | 59.6 | 0.04 | 59.7 | 210 | Vacuum treatment | Poplar untreated | 34.98 | 8.07 | 43.05 | | | | Poplar HT | 36.99 | 3.77 | 40.76 | 160 | Treatment under vapor | [36] | Poplar HT | 36.31 | 4.35 | 40.66 | 180 | Poplar HT | 37.63 | 1.67 | 39.31 | 200 | Poplar HT | 37.55 | 1.13 | 38.68 | 220 | European ash untreated | 43.94 | 6.74 | 50.68 | | | | European ash HT | 52.19 | 0.1 | 52.2 | 192 | Treatment under vapor | [20] | European ash HT | 52.61 | 0.1 | 52.62 | 202 | European ash HT | 51.58 | 0.1 | 51.59 | 212 |
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