Mechanical properties of jute fibers and interface strength with an epoxy resin

Abstract

Four different forms of jute fibers, namely untreated jute filament (UJF), sliver jute filament (SJF), bleached jute filament (BJF), and mercerized jute filament (MJF), have been subjected to tensile strength analysis following Weibull's theory. The MJF and BJF were obtained by the chemical modification of the UJF. A minimum of 50 fibers of each type, at three different gauge lengths, i.e., 15, 30, and 50 mm, were used to study the strength distribution and the effect of gauge length. The mean fiber strength was found to be the maximum for UJF followed, in the order, by BJF, MJF, and SJF (ϳ 700, ϳ 660, ϳ 580, and ϳ 540 MPa, respectively, at 50-mm gauge length). The strength was also found to decrease with an increase in gauge length. In all cases, good agreement was found with Weibull's statistical model. Single fiber composite tests, with an epoxy resin as the matrix, were carried out determine the critical fragment lengths and interfacial strength, following the Kelly-Tyson approach. The BJF was found to have the maximum interfacial adhesion ( Ϸ 140 MPa) followed by UJF, SJF, and MJF having values of ϳ 83, ϳ 57, and ϳ 47 MPa, respectively. Scanning electron microscope pictures showed the fiber surface was physically modified by the various treatments.

Assessment of the tensile properties of coir, bamboo and jute fibre

“…2 illustrates that and tthe longer the fibre, the more chance there is for a weak link where the fibre can break at a certain load [1]. The tensile strength is described through the Weibull distribution by a lot of scientists [2,3]. The use of this distribution can be defended if the strength is controlled by the presence of critical flaws and if the material is brittle.…”

Solvent‐free acetylation of lignocellulosic fibers at room temperature: Effect on fiber structure and surface properties

“…This work presents a process that increases the hydrophobicity of the fibers while respecting the environment (no solvent used) and is economically viable in terms of energy and equipment (no heating required). The main objectives of this study are (1) to evaluate the effect of acetylation time on the cellulosic fibers structure and (2) to study the influence of this chemical treatment on the wettability of fibers in order to evaluate their affinity with epoxy resins frequently used in composite materials. For this purpose, flax, Kraft, and thermomechanical pulp fibers were acetylated in a heterogeneous reaction environment, for different reaction times at room temperature and the structural modification of lignocellulosic fibers have been examined.…”

Matrices for natural-fibre reinforced composites

“…Tripathy et al 180 used the single fibre fragmentation test for determining the critical fibre length and IFSS of jute fibre reinforced epoxy composites. In an interesting study, Valadez-Gonzalez et al 181 have shown that there is a maximum quantity of silane coupling agent that can be deposited on henequen fibre.…”