Topic
SISAL
About: SISAL is a research topic. Over the lifetime, 1878 publications have been published within this topic receiving 55528 citations.
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01 May 1995
2 citations
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25 Jan 2017
TL;DR: In this article, a preparation method of a sisal fiber porous material capable of improving high, medium and low frequency sound absorption performance is described. But the method is characterized by comprising steps as follows: natural sisal fibers are selected and treated with sodium hydroxide and hydrogen peroxide, so that surfaces of the fibers are swollen and loose, sub-fibers in dozens of or hundreds of micron size are produced, the fiber are bonded with a polyurethane adhesive, and a sound absorption fiber composite material is prepared.
Abstract: The invention relates to a preparation method of a sisal fiber porous material capable of improving high, medium and low frequency sound absorption performance. The preparation method is characterized by comprising steps as follows: natural sisal fibers are selected and treated with sodium hydroxide and hydrogen peroxide, so that surfaces of the fibers are swollen and loose, sub-fibers in dozens of or hundreds of micron size are produced, the fibers are bonded with a polyurethane adhesive, and a sound absorption fiber composite material is prepared. The sound absorption material adopts a simple preparation method, is environment-friendly, low in cost and wide in source, and has outstanding medium and low frequency sound absorption performance.
2 citations
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01 Jan 1992TL;DR: Large scale extraction of hecogenin (Steroid sapogenin) from sisal juice sediment and further conversion of heCogenin to androstan (17-01-3-one) has been presented.
Abstract: Sisal plants (agave family) are grow in abundance in many parts of India in waste iands. These plants (Fig.1) can be grown under arid and semi arid conditions and survive with an annual rainfall between 35 mm and 300 mm. Mexico Brazil, Philippines and Tanganyika have large plant ions covering thousands of acres. At present this plant is mainly utilized as a source of fibre, the yield of which is about 3–4% of leaf weight. The remaining 96% is left unutilized and is thus wasted. Preliminary investigations carried out on Sisal juice and pulp in our laboratory after extracting fibre gave the following results: Hecogenin: 0.06–0.1% leaf weight; Wax from cuticles: (0.3-0.35% leaf weight) Paper from waste fibre in Sisal pulp: 0.15–0.2% of leaf weight.In this paper, large scale extraction of hecogenin (Steroid sapogenin) from sisal juice sediment and further conversion of hecogenin to androstan (17-01-3-one) has been presented.
2 citations
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2 citations
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TL;DR: In this paper , the authors evaluated the mechanical, thermomechanical, electrical, and piezoresistive behavior of biocomposites with different GNP contents (0, 1, 4, 6, and 8 wt%).
Abstract: Spray coating and vacuum-assisted resin infusion processes were implemented in this work to develop multifunctional biocomposite laminates. The biocomposites were fabricated using a bio-based epoxy resin reinforced with natural sisal fibers coated with graphene nanoplatelets (GNPs). A systematic characterization of material properties was performed to evaluate the mechanical, thermomechanical, electrical, and piezoresistive behavior of biocomposites with different GNPs contents (0, 1, 4, 6, and 8 wt.%). The mechanical tests revealed that adding GNPs to biocomposites has a slight positive effect on their flexural properties compared to the neat biocomposites (without GNPs). The electrical and thermomechanical tests showed that the electrical conductivity and glass transition temperature of biocomposites containing GNPs were enhanced significantly, achieving average values of 5.19 x 10-4 S/m and 63.29°C (26%), respectively. Regarding electromechanical tests, the biocomposites with 8 wt.% GNPs exhibited an excellent piezoresistive behavior under monotonic loading conditions, achieving a gage factor (strain sensitivity) of 3.56. Bending tests with cyclic loading were also performed, and cyclic reproducibility of the piezoresistive response of the biocomposites after 10 cycles was demonstrated, evidencing that the incorporation of GNPs onto sisal fibers by spray-coating produces an effective formation of conductive networks into biocomposites suitable for sensing applications.
2 citations