Datasets on the study of thermodynamic and hygroscopic behaviors of two dense African tropical woods, Erythrophleum sauveolens and Nauclea diderrichii
Description
The datasets presented in this study include the relative humidities and moisture contents subjected to hygrometric conditions, and extract contents of two dense African tropical woods obtained through extraction in solvents. In this work, the thermodynamic behaviour of these species during desorption and the effect of extraction on the hygroscopic behaviour were evaluated. In this study, the role of the anatomical structures on the thermodynamic properties and desorption isotherms and the effect of wood extractives on the moisture sorption behaviour were verified. Anatomical structures such as porosity, parenchyma, rays and vessels could influence the hygroscopic behaviour of the species studied. Wood treated with solvents and native wood were subjected to sorption experiments. The data in Table 1 shows the experimental relative humidities values obtained using the static gravimetric method during desorption at seven equilibrium moisture contents, which were recorded during data collection. These values, which are greater for Bilinga than Tali, increase with temperature and equilibrium moisture content. The anatomical structures of Bilinga than Tali could indicate its ability to accommodate more water molecules than Tali and the presence of more vapour in the environment at higher temperatures. These data can also explain the energy requirements during drying, which are related to their. The data in table 2 describes the equilibrium moisture contents values obtained during moisture desorption at three temperatures and six relative humidities. These values increase with relative humidity and decrease with increase in temperature. From the data, Tali is less hygroscopic than Bilinga. The anatomical structures of these wood species could influence this behaviour. The data in table 3 describes masses of extract, which were measured after filtration and concentration. The extracts macerated from wood powder, are the highest with acetone followed by methanol, ethanol, hot water, ethanol-toluene and toluene were higher in Tali than Bilinga. The presence of more extracts in a species can explain its hydrophobic and hydrophilic tendencies towards water molecules. Data for equilibrium moisture contents of the species studied obtained using the static gravimetric method, at relative humidities between 5.3 and 97% at temperatures from 30 to 70oC during adsorption and desorption are presented in table 4. The data collected by weighing samples at thermodynamic equilibrium, show that the equilibrium moisture contents values in sets of nine samples increase with increase in relative humidity and decrease with increase in temperature. These data can be presented as moisture sorption isotherms to also describe the behaviour of woods with similar anatomical and chemical properties in similar climatic conditions and can also indicate the appropriate moisture contents applicable in different environments of application.