Desorption Behavior and Thermogravimetric Analysis of Bio-Hardeners  

作　　者：Benoit Ndiwe Antonio Pizzi Hubert Chapuis Noel Konai Lionel Karga Pierre Girods Raidandi Danwe 

机构地区：[1]Department of Mechanical Engineering,Higher Technical Teacher Training College Douala(ENSET),University of Douala,Douala,Cameroon [2]Laboratory of Forest Resources and Wood Valorization(Larefob),ENSET of Douala,Douala,Cameroon [3]Department of Engineering Science,West University,Trollhättan,Sweden [4]LERMAB-ENSTIB,University of Lorraine,Epinal,88051,France [5]Laboratoire D’Etudes et de Recherche sur le Matériau Bois LERMAB,Facultédes Sciences et Technologies,Universitéde Lorraine,Nancy,France [6]Laboratory of Materials Mechanics,Structures and Integrated Manufacturing,National Advanced School of Engineering,Yaoundé1 University,Yaoundé,Cameroon [7]Department of Mechanical Petroleum and Gas Engineering,Faculty of Mines and Petroleum Industries,University of Maroua,Kaélé,Cameroon [8]Laboratory of Mechanic,Materials and Building,Sahel Institute of Maroua University,Maroua,Cameroon

出　　处：《Journal of Renewable Materials》2022年第8期2015-2027,共13页可再生材料杂志（英文）

摘　　要：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℃and 110℃reflecting the loss of water from the adhesive and the formation of some traces of volatile organic compounds such as CO_(2)and CO,a second zone characterized by the release of CO,CO_(2)and CH4 gases with peaks between 110°and 798.8℃.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.

关 键 词：EXUDATES PYROLYSIS FTIR bio-hardener DESORPTION 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]