材料科学
复合材料
耐化学性
极限抗拉强度
抗弯强度
纤维素
脱胶
吸水率
次氯酸钠
石膏
韧皮纤维
热稳定性
化学成分
氢氧化钠
化学工程
制浆造纸工业
化学
有机化学
工程类
作者
Achille Désiré Omgba Betené,Claude S Batoum,Remy L Ndoumou Belinga,Fabien Betené Ebanda,Jean Gaston Tamba,Atangana Ateba,Roger Moukené,Gilbert K Tcheudjo,André Nyembè
标识
DOI:10.1177/00219983231174682
摘要
Identifying the potential of new bast fibres is a solution for diversifying biobased reinforcements and replacing environmentally harmful synthetic fibres. In this study, fibres were extracted from Megaphrynium macrostachyum stems by biological and chemical retting. The chemical fibres were bleached with a 2.5wt% sodium hypochlorite (NaClO) solution. The biological, chemical and bleached fibres were analysed from a chemical, morphological, physical, mechanical and thermal point of view. The possibility of using these fibres as reinforcement in gypsum-based biocomposites for construction was analysed by three-point bending tests. Chemical analysis revealed a cellulose content of more than 56 wt% within the usual range (50-85 wt%) for reinforcing fibres. SEM images showed that bleaching cleans the surface of the fibres. Physical analysis by gravimetric analysis showed that the bleached fibre had the lowest density (1.01 g.cm −3 ), fineness (5.2tex) and water absorption (64wt%). In addition, the highest thermal stability (237°C) was obtained for the chemical fibre. Young’s modulus and tensile strength, evaluated according to ASTM D3822-07, were dispersed and depended on the fibre diameter, and the highest values were obtained for the chemical fibre (6.4 GPa and 251 MPa). In contrast, gypsum composites with a volume fraction of 1.5% bleached chemical fibre had the highest stiffness (258 MPa) and flexural strength (5 MPa). The results obtained for each fibre type are relatively close to those of other fibres in the literature, indicating that all three fibre types studied can be used as alternative raw materials for the manufacture of gypsum-based biocomposites.
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