SISAL

About: SISAL is a research topic. Over the lifetime, 1878 publications have been published within this topic receiving 55528 citations.

Water absorption and its effect on mechanical properties of sisal composite

Abstract: Apart from many applications of natural fibres reinforced polymer composites, still they are not being used in outdoor applications because of their higher water absorption thereby degradation in m...

Effect of water glass treatment on the mechanical and thermooxidative properties of kenaf and sisal fibres

Abstract: In this article, the effect of water glass on the mechanical and thermooxidative properties of kenaf and sisal fibres has been investigated. Single fibres were manually separated from the bundles and immersed in liquid water glass that produced a thick polysilicate coating. The water glass treatment significantly improved the tensile strength and the Young’s modulus of the kenaf and sisal fibres, in relation to the untreated fibres. The improved failure strain of sisal fibre could have occurred because the axial splitting is promoted and the transverse cracking is delayed by the water glass treatment. The reduced thermal resistance of the water glass treated sisal is even more interesting when considering that NaOH treatment (major constituent of water glass) of sisal caused an opposite effect. The thermogravimetric analysis results showed that the water glass treatment strongly affected the chemical composition of the kenaf and sisal fibres. The water glass based thick polysilicate coating was about 40 w...

An Investigation on the Effect of Silica Aerogel Content on Thermal and Mechanical Properties of Sisal/PLA Nano Composites

Abstract: In this research work, the authors proposed to prepare sisal/poly(lactic acid) (PLA) composites with various amounts of silica aerogel (SAG) particles and studied the effect of aerogel content on the mechanical properties and thermal properties. Characterization of the composites in the presence and absence of aerogel particles were studied by Differential scanning calorimeter and Thermogravimetric analysis analysis. The dispersion trend of SAG particles and interfacial adhesion between the matrix and fibers were assessed by Scanning Electron Microscope (SEM) micrographs of the surface and fractured surface of the composites, respectively. The thermal degradation temperatures of PLA/Sisal composites were increased by compounding with SAG particle. The tensile strength, flexural strength, modulus and water sorption increased with SAG content in the range of 0 to 2 wt%. However, NaOH (5 wt%) treated sisal fiber nanocomposites imparts superior mechanical properties than those of untreated ones. The fracture surface morphologies showed that the SAG particles are uniformly dispersed in PLA matrix. The results obtained by SEM confirmed that the interfacial adhesion between SAG and PLA matrix was good. Biodegradation studies were also performed to study the effect of SAG particles on degradation rate of the composites. Results indicated that the addition of SAG particles improved the overall performance of the composites including their thermal stability and mechanical properties. This work provides us the exploratory idea of using SAG particles as additives in biodegradable composites for possible applications, such as interior parts of automobiles and marine industry etc. POLYM. COMPOS., 2016. © 2016 Society of Plastics Engineers

Strengthening of Plain Concrete Cylinders with Natural FRP Composite Systems

Abstract: This paper reports the performance of plain concrete cylinders confined externally with fiber-reinforced polymer (FRP) composites with natural sisal as the reinforcement. Strength tests are performed on plain concrete cylinders confined with different sisal FRP thicknesses such as 1, 2 and 3 layers. The results show that external confinement with sisal FRP enhanced the axial load-carrying capacity, ductility and energy absorption of concrete compared to control specimens. For predicting the ultimate strength of sisal FRP-confined concrete a new strength equation was developed based on the lateral confining pressure of sisal FRP which shows a good agreement with the experimental results. To assess the durability criteria, sisal FRP-filled concrete specimens are exposed to severe environmental factors such as variation in temperature, alternate wet and dry cycling and exposure to alkaline condition. The outcomes indicate that sisal FRP-confined specimen subjected to temperature variation has shown a remarkable increase in strength, whereas alkaline exposure has exhibited a decrease in strength.

Mechanical behavior and water absorption in sisal/glass hybrid composites

Abstract: This study aimed to assess the effect of hybridization on thermomechanical properties and water absorption of composite materials, by introducing sisal fiber tissue into the material. To that end, two composite material plates were manufactured, the first with five layers of E-glass reinforcement mat and the second with three layers of E-glass fiber interspersed with two layers of sisal fibers, both used as an orthophthalic polyester resin matrix. The material was then submitted to tensile, three-point bending and water absorption tests. It was observed that hybridization causes a change in both the final strength and stiffness of the material. Keywords: Composite material, water absorption, mechanical properties, natural fibers.