Figures & data
Table 1. Mean values (± standard deviations) of weight and volumetric changes of wood samples due to different treatment processes.
Table 2. Mean values (± standard deviations) of change of ΔL*, Δa*, and Δb* in different treated samples.
Figure 1. Total colour change (ΔE*) of the wood samples after treatment with glycerol, combined glycerol and vacuum-heat treatments. GL: glycerol pretreatment; VHT: vacuum-heat treatment; GL-VHT: glycerol-vacuum-heat treatment. Box-plots with whiskers from the minimum to the maximum; the box represents 25%, 50% and 75% quartile; the mean value of each data set is depicted as quadrate inside the box. Different lower case letter indicated that there was a significant difference (p ≤ 0.05) as determined by ANOVA and Tukey HSD post-hoc test.
Table 3. Mean values (± standard deviation) of MOE and MOR of different treated samples.
Figure 2. Adsorption (a) and desorption (b) isotherms of untreated and treated wood for the whole range of RH. GL: glycerol pretreatment; VHT: vacuum-heat treatment; GL-VHT: glycerol-vacuum-heat treatment.
Figure 3. Moisture increment during adsorption (a) and decrement during desorption (b) of untreated and treated wood at each given RH over the full RH range. GL: glycerol pretreatment; VHT: vacuum-heat treatment; GL-VHT: glycerol-vacuum-heat treatment.
Figure 4. Hysteresis of untreated and treated wood at each given RH level during the sorption run (obtained by subtraction of EMC between desorption and adsorption at the same RH level, according to Hosseinpourpia et al. Citation2019). GL: glycerol pretreatment; VHT: vacuum-heat treatment; GL-VHT: glycerol-vacuum-heat treatment
