SISAL

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

Permeability and mechanical property correlation of bio based epoxy reinforced with unidirectional sisal fiber mat through vacuum infusion molding technique

Abstract: The present investigation is focused to study the permeability of natural fiber during vacuum infusion (VI) process and the effect of the surface treatments of natural fiber, fiber loading direction, resin flow direction and process parameter on the tensile properties of developed composites (sisal/bio based epoxy). The bio based resin exhibits good flow characteristics in NaOH and isocyanate treated fibers which may be attributed to change in polarity. The surface treatments appear to provide an appreciable enhancement in tensile strength through enhanced bonding between fiber and matrix. The longitudinal tensile strength has been found to be higher than that of the transverse direction and the flow along the fiber provides maximum tensile strength. It has also been demonstrated that VI process provides improved mechanical properties as compared to hand-layup process. Morphological studies of fractured developed composites were performed by scanning electron microscopy (SEM) to understand the de-bonding of fiber/matrix adhesion. POLYM. COMPOS., 2015. © 2015 Society of Plastics Engineers

Thermal buckling of sisal and glass hybrid woven composites: Experimental investigation

Abstract: The influence of hybridization of sisal woven fabric with glass fabric on thermal buckling behaviour of composite beam has been analysed experimentally. Initially, non-uniform heating (upward-downward, downward and downward-upward) has been achieved by positioning infrared (IR) heaters at the chosen locations along the longitudinal direction of the composite beam and deflection of the composite beam in the lateral direction measured through LabVIEW program and linear variable displacement transducer. Experiment results indicate that deflection behaviour of the beams under thermal load is entirely different from the deflection under mechanical load. The beams exhibited snap-through deflection behaviour with multiple inflection points due to the thermal load. Results revealed that the sisal woven fabric reinforced composite has high deflection under thermal load than hybrid composites. High elastic modulus and sandwiching effect as a result of hybridization provides more resistance against thermal deflection of the hybrid composites. Furthermore, the layering sequence and type of heating also influences the performance of the composites under thermal load. Results revealed that compared to cross ply sisal composite, an angle ply composite enhanced the resistance against deflection. Synergy effect of sandwiching and ply lay-up enhances resistance against deflection of the composite beams under non-uniform thermal load.

Influence of Nanosilica Particle Addition on Mechanical and Water Retention Properties of Natural Flax- and Sisal-Based Hybrid Nanocomposites under NaOH Conditions

Abstract: Organic filament-based lightweight materials are increasingly being used because of their high strength-to-weight ratio, recyclability, and low cost. The application of nanofillers in addition to natural fibres is a fascinating one. The main purpose of the current experimental investigation is to manufacture and estimate the mechanical material of nanocomposites. Natural fibres like flax and sisal are used as reinforcement; nanosilica particles act as fillers, and epoxy resin as a matrix. The composites were created using the Taguchi L9 orthogonal array and a hand lay-up technique. The mechanical and water retention behaviour of the hybrid composites is based on the following three parameters, each with three different levels: (i) adding different weight ratios of nanofiller (1.5, 3, and 4.5 wt%), (ii) weight ratio of reinforcements (20, 30, and 40 wt%), and (iii) duration of NaOCl conditions (2, 4, and 6 hours). Mechanical possessions like tension, bending, and impact were tested as per the ASTM standard. The tested composites show that 30 wt% reinforcement, 3 wt% nanosilica, and 4 hours of alkaline processing provide the best materials and aquatic preoccupation belongings. When compared to nanofiller composites, nanoparticle-filled composites have 17% evolution in tension, 22% upsurge in flexural strength, 13% in impact strength, and 36% increase in impact strength hygroscopic behaviour. Scanning electron microscopes were used to analyze the fractured structure of hybrid composites. Compared to 1.5 and 4.5 wt% of nanofiller, the 3 wt% of filler provides high interfacial adhesion to the hybrid composites. It helps the reinforcement and matrix to contact each other.

Composite rope core

Abstract: The utility model relates to a composite rope core, which comprises multi-strand jute yarns and multi-strand sisal yarns. The rope core has a composite structure and is formed through the blending and entwisting of the jute yarns and the sisal yarns; the entwisting distance of the rope core is one to three times of the diameter of the rope core; the sisal yarns are arranged on the outer layer, and the jute yarns are arranged on the inner layer; and the jute yarns further comprise three folded jute yarns. Compared with the prior art, the utility model has the benefits as follows: the composite rope core fully absorbs the respective advantages of the sisal yarns and the jute yarns, that is, the sisal yarns have strong corrosion resistance, and the oil content of the jute yarns is high, so that after processing, the sisal yarns play the roles of resisting squeezing and corrosion on the outer layer, and the jute yarns keep abundant oil content on the inner layer to further resist corrosion. Therefore, the fiber rope core inside a steel wire rope not only achieves the filling effect, but also protects the steel wire rope.