SISAL

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

Tensile properties of natural fiber- reinforced epoxy-hybrid composites

Abstract: A study has been carried out to investigate the tensile properties of composites made by reinforcing sisal, coconut spathe and ridge gourd as the new natural fibers into epoxy resin matrix. The natural fibers extracted by retting and manual processes were subjected to alkali treatment. The composites fabricated consist of reinforcement in the hybrid combination like sisalcoconut spathe, sisal-ridge gourd and coconut spathe-ridge gourd with the weight fraction of fibers varying from 5% to 30%. It has been observed that the tensile properties increase with the increase in the weight fraction of fibers to certain extent and then decreases. The hybridization of the reinforcement in the composite shows greater tensile strength when compared to individual type of natural fibers reinforced. For all the composites tested the tensile strength of the composite increased for approximately 25% of weight fraction of the fibers and further for the increase in the weight fraction of fiber the strength decreased, also it is found that for the hybrid combination of ridge guard and sisal fibers there is 65% increase in the tensile strength.

Tire rubber–sisal composites: Effect of mercerization and acetylation on reinforcement

Abstract: Tire rubber particles were mixed randomly with short sisal fibers and hot pressed. Sisal fibers were used as received, mercerized, and mercerized/acetylated. The fibers were characterized by scanning electron microscopy (SEM), thermal gravimetry analysis (TGA), infrared spectroscopy (FTIR), water sorption, and mechanical properties. Thermal stability of the mercerized/acetylated fibers improves (from 200 to 300°C) with respect to the raw fibers, and water sorption is ∼ 20% smaller than for the raw and the mercerized fibers. Tensile strength is unchanged after the chemical treatments. Water sorption, mechanical properties, and SEM evaluated the performance of the tire rubber composites. All composites showed enhanced elastic modulus; increase is dependent on fiber load. Smallest water sorption was obtained in composites with the mercerized/acetylated fibers. With these fibers at 10% load, the best results were obtained with the smaller tire rubber particles (320 μm) and at 5% load with the bigger (740 μm) tire rubber particles. Both composites showed ∼ 50% increase in tensile strength when compared to similar composites with raw fibers. SEM of the surface of fracture showed that the adhesion between fiber and rubber was enhanced after both chemical treatments. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 2507–2515, 2003

Effect of Treatment of Maleic Anhydride on Mechanical Properties of Natural Fiber: Polystyrene Composites

Abstract: In the present work, banana, hemp, and sisal fibers are employed as fillers for the formation of natural fiber:polystyrene composites in the ratios of 55:45, 50:50, 45:55, and 40:60 (wt/wt). The natural fibers were treated with maleic anhydride. The Young's modulus, flexural modulus, impact strength, and Shore-D hardness all decreased with increasing amounts of fibers in the natural fiber:polystyrene composites. The sisal fiber composites show the highest mechanical strength for all ratios. A maleic anhydride treatment shows significant improvement in Young's modulus, flexural modulus, impact strength, and Shore-D hardness compared with the untreated fiber composites.