Journal of Adhesion Science and Technology ( IF 2.3 ) Pub Date : 2020-11-30 , DOI: 10.1080/01694243.2020.1850611 Noel Konai 1 , Antonio Pizzi 2, 3 , Raidandi Danwe 1, 4 , Meva’a Lucien 1 , Karga Tapsia Lionel 5
Abstract
The Daniellia oliveri, Ficus sycomorus, Butyrospermum parkii and Azadirachta indica barks tannins were extracted, used in the development of four different resins hardened with the Vachellia nilotica exudates and in the development of an unidirectional biocomposite reinforced with woven banana stalk fibers. The percentage yield of these tannins was, respectively, 29%, 46%, 40% and 35%. Their behavior and reactivity were studied using gel time and thermomechanical analysis. The F. sycomorus resin reacted well with V. nilotica as biohardener, its gel time was 600 s. The modulus of elasticity (MOE) of R1, R2, R3 and R4 resins formulations were, respectively, 2.37*103 MPa, 7.05*103 MPa, 4.62*103 MPa and 2.65*103 MPa. They degraded, respectively, at 183, 174, 139 and 165 °C. The MOE and bending strength (MOR) of each unidirectional biocomposite were, respectively, 10; 24; 18; 15 GPa and 52; 78; 66; 60 Mpa.
中文翻译:
非洲单宁树脂的热力学分析和生物复合材料表征
摘要
的Daniellia篦子,榕sycomorus,乳油木果和印楝树皮单宁提取,在与硬化四种不同树脂的开发中使用的阿拉伯金合欢渗出物,并且在一个单向生物复合材料的开发与编织香蕉茎纤维加强。这些单宁的产率百分比分别为 29%、46%、40% 和 35%。使用凝胶时间和热机械分析来研究它们的行为和反应性。所述F. sycomorus树脂与反应很好V.罗非鱼作为biohardener,其凝胶时间为600秒。R 1 , R 2的弹性模量 (MOE)、R 3和R 4树脂配方分别为2.37*10 3 MPa、7.05*10 3 MPa、4.62*10 3 MPa和2.65*10 3 MPa。它们分别在 183、174、139 和 165 °C 下降解。每种单向生物复合材料的 MOE 和弯曲强度 (MOR) 分别为 10;24; 18; 15 GPa 和 52;78; 66; 60 兆帕。