Microstructure and physico-chemical transformation of some common woods from Cameroon during drying

Hydrothermally Derived Hydrochar from Waste Sawdust for Solar Vapor Generation

“…The spectra were divided into several regions: 1) 3700–3050 cm −1 regions corresponded to the stretching vibration of hydroxyl group, O–H, 2) 3000–2800 cm −1 regions correlated with the symmetric and asymmetric stretching vibration in the C–H group, 3) 1800–900 cm −1 regions were attributed to the stretching vibration of multiple bonds group, that is, CC and CO (carbonyl), stretching vibration of the C–C and C–O (hydroxyl, ester, or ether) bonds, along with the deformation vibrations of C–H bond and O–H groups of hemicellulose, cellulose, and lignin. [ 13,29,30 ] According to the spectra, prominent changes in the bands of the region between 1800 and 900 cm −1 were observed with the increase of the HTC temperature and time. From the spectra, the shift of the band from 1730 cm −1 (carbonyl CO) to 1700 cm −1 (OC 2 H 2 C 2 H 2 CHO) indicated the decomposition of hemicellulose.…”

Response surface methodology approach for dyeing process optimization of Ayous (Triplochiton scleroxylon) wood with acid dye

“…Ayous (Triplochiton scleroxylon), also known as Obeche, is an important species from the tropical forests in West and central African, especially in Equatorial Guinea, Cameroon and Gabon. It is a large deciduous tree growing up to 50 m in height and up to 1.5 m in diameter (Jardine et al, 2016;Nouemsi Soubgui et al, 2021;Togue Kamga, 2018). The timber from Ayous possesses unique intrinsic features, such as uniform material properties, high processability, small drying shrinkage and few appearance defects that have led to it being widely used in the production of multilaminar decorative lumber (MDL).…”