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Desorption Behavior and Thermogravimetric Analysis of Bio-Hardeners
Högskolan Väst, Institutionen för ingenjörsvetenskap, Avdelningen för svetsteknologi (SV). Department of Mechanical Engineering, Higher Technical Teacher Training College Douala (ENSET), University of Douala, Douala (CMR); Laboratory of Forest Resources and Wood Valorization (Larefob), ENSET of Douala, Douala (CMR). (PTW)
LERMAB-ENSTIB, University of Lorraine, Epinal (FRA).
Laboratoire D’Etudes et de Recherche sur le Matériau Bois LERMAB, Faculté des Sciences et Technologies, Université de Lorraine, Nancy (FRA).
Laboratory of Materials Mechanics, Structures and Integrated Manufacturing, National Advanced School of Engineering, Yaoundé 1 University, Yaoundé (CMR).
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2022 (engelsk)Inngår i: Journal of Renewable Materials, ISSN 2164-6325, E-ISSN 2164-6341Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

In this work, the thermal degradation and drying of bio-hardeners are investigated. Four bio-hardeners based on exudates of Senegalia senegal, Vachellia nilotica, Vachellia seyal, and Acacia Siebteriana were analyzed by FTIR and thermogravimetric analysis, and a desorption study was also conducted. The analysis by infrared spectroscopy indicates the existence of oligomers of different types all giving 5-hydroxy-2-hydroxymethylfuran and 2, 5-dihydroxymethylfuran which are then the real hardening molecules. The pyrolysis of these extracts reveals three main regions of mass loss, a first region is located between 25 degrees C and 110 degrees C reflecting the loss of water from the adhesive and the formation of some traces of volatile organic compounds such as CO2 and CO, a second zone characterized by the release of CO, CO2 and CH4 gases with peaks between 110 degrees and 798.8 degrees C. At the end of the analysis, about 22% of the initial mass remains undecomposed, this mass corresponds to the rigid segments of the bio-hardener which are not completely decomposed.

sted, utgiver, år, opplag, sider
TECH SCIENCE PRESS , 2022.
Emneord [en]
Exudates; pyrolysis; FTIR; bio-hardener; desorption
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URN: urn:nbn:se:hv:diva-18219DOI: 10.32604/jrm.2022.019891ISI: 000757423900001Scopus ID: 2-s2.0-85129672597OAI: oai:DiVA.org:hv-18219DiVA, id: diva2:1647947
Tilgjengelig fra: 2022-03-29 Laget: 2022-03-29 Sist oppdatert: 2024-04-12

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