Selection of high strength natural fibers

Materia

Satyanarayana, K.G.¹  Lopes, F.P.D.²  Ferreira, A.S.²  Inácio, W.P.²  Monteiro, S.N.²  Bevitori, A.B.²  Silva, I.L.A.²  Bravo Neto, J.²  Nascimento, D.C.O.² 

[1] Federal University of Paraná, Curitiba, Brazil;University of the Northern Rio de Janeiro, Campos dos Goytacazes, Brazil

关键词: Lignocellulosic fibers;    polymeric composites;    statistical evaluation;    Brazilian natural fibers.;   

DOI  :  10.1590/S1517-70762010000400002

学科分类：工程和技术（综合）

来源: Universidade Federal do Rio de Janeiro * Coordenacao dos Programas de Pos-Graduacao de Engenharia

【 摘 要 】

By means of dimensional selection of natural lignocellulosic fibers, based on precise diameter measurements, it was recently possible to obtain fibers with relatively higher tensile strength. The present article overviews works on the statistical evaluation, through the Weibull analysis, of the ultimate tensile stress of eight lignocellulosic fibers: sisal, ramie, curaua, jute, bamboo, coir, piassava and buriti. It is shown that, for all of these fibers, the tensile strength holds an inverse relationship with the fiber diameter. Statistically this relationship conforms to a hyperbolic type of analytical equation, which discloses the possibility of unusually high strength fibers to be selected in association with very small diameters. A structural analysis using scanning electron microscopy offered an explanation to the strengthening mechanisms responsible for the superior performance of these dimensionally selected fibers.

【 授权许可】

CC BY