Static and dynamic mechanical properties of novel treated jute/green epoxy composites

Abstract

The focus of this paper is to evaluate the mechanical and dynamic mechanical properties of woven jute fabric-reinforced green epoxy composites as a function of modification of jute fibers by enzyme, CO2 pulsed infrared laser and ozone treatments. The treated jute fibers were characterized by scanning electron microscopy and Fourier transform infrared spectroscopy. Composites were prepared by the hand layup method and compression molding technique and the resin curing process was optimized with the help of differential scanning calorimetry. The treatments resulted in the enhancement of flexural and impact properties. Statistical analysis of mechanical properties of composites, done by one-way analysis of variance, showed significant differences between the results obtained. Dynamic mechanical analysis (DMA) results revealed that treated composites have a higher storage modulus over the range of temperature. A positive shift of loss modulus and tangent delta peaks of treated composites to higher temperature was observed. The reduction in the tangent delta peak height of treated composites was also observed due to improvement in fiber/matrix interfacial adhesion. The degree of interfacial adhesion between the jute fiber and green epoxy was anticipated using the adhesion factor obtained through DMA data. Complex modulus variations and phase behavior of composites was studied by Cole–Cole analysis.

Mechanical properties and water absorption characteristics of composites reinforced with cotton fibres recovered from textile waste

“…This is because with an increase in fibre volume fraction the fibre-matrix interfacial bonding increases and therefore polymer molecular mobility reduces. 18 The tan delta peak values for composites with 0.1, 0.2, 0.3 and 0.4 fibre volume fraction are 0.629, 0.478, 0.325 and 0.207, respectively. Thus, the composite with 0.4 fibre volume fraction is more elastic compared with rest of the composites.…”

Static and Dynamic Mechanical Properties of Cotton/Epoxy Green Composites

“…A comparison of the DMA results of cotton epoxy composites to those of the Jute /epoxy composites [29] is shown in Figure 5 (see page109). From the results it can be seen that the storage modulus of the cotton epoxy composites is less as compared to the jute epoxy composites.…”

Investigation of the Properties of Natural Fibre Woven Fabrics as a Reinforcement Materials for Green Composites

“…The other reason for that contraction may arise from treatment of the fibre for good wetting with a polymer matrix via alkali treatment. It is known that alkali treatment decreases the fibre strength while increasing fibre-matrix interface bonding [2]. Damage to the cellulose macromolecule with respect to breakage of macromolecular chains, and decrease in the degree of polymerisation and of crystallinity cause a decrease in fibre strength during alkali treatment [24].…”

“…In the recent decades, natural fibres used as an alternative reinforcement material in polymer composites have attracted the attention of many researchers and scientists due to their advantages over conventional glass and carbon fibres, thereby increasing environmental concern and creating a high demand for environmentally friendly materials [1,2]. Europeans used about 315,000 tonnes of natural fibres in 2010, which was 13% of the total reinforcement materials for composites.…”