Extract yields of two commercially valuable wood species in Central Africa: Bilinga and Tali, their nature and role in water sorption activities
Source abstract
Abstract
This paper aimed at determining the quantity, nature and role of extracts during the sorption behavior of two Central African hardwood species: Nauclea diderrichii (Bilinga) and Erythrophleum suaveolens (Tali) at 30, 40, 50, 60 and 70°C using relative humidities (RH) between 5.3% and 97%. For this purpose, extract contents and their nature were determined by solvent extraction and mass spectrometric analysis (MALDI-TOF/MS) respectively. The ABC model whose parameters were used to determine the monolayer moisture capacity (EMCm) also described type II sigmoidal sorption isotherms. The results showed that acetone extracts were the highest in Tali (7.88%) and Bilinga (6.92%). MALDI-TOF results found 10 new chemical components out of 24 in Tali (saponins, flavonoids, glycosides, alkaloids and stilbenes) while 16 were identified as saponins, acids and flavonoids in Bilinga. Acetone-soluble extracts had the most significant effect on the hygroscopic nature of wood. Extracted wood recorded higher equilibrium moisture contents (EMC), monolayer moisture capacities and lower sorption differences. For native wood, water-repellent polyphenols like alkaloids and stilbenes and newly identified components there in, rendered Tali less hygroscopic than Bilinga. The nature of extractives would be an effective alternative to explore the chemical compounds, which can best improve the hygroscopic response of wood.
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Research context
OpenAlex topics: Bamboo properties and applications · Wood Treatment and Properties · Biological Stains and Phytochemicals
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Laboratory of Forest Resources and Wood Valorization, Training Unit in Engineering Sciences, Post Graduate School of Fundamental and Applied Sciences, The University of Douala, Douala, Cameroon
Higher Technical Teachers’ Training College Bambili, The University of Bamenda, Bambili, Cameroon
Laboratory of Studies and Research on Wood Material (LERMAB), University of Lorraine, Blvd des Aiguillettes, Nancy, France
The University Institute of Technology, University of Douala, Douala, Cameroon
Laboratory of Mechanics, University of Douala, Douala, Cameroon
Department of Mechanical Engineering, Faculty of Engineering and Technology, University of Buea, Buea, Cameroon
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