SISAL

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

Thermomechanical behavior of sisal fibers grafted with poly(acrylamide-co-n-vinyl-2-pyrrolidone) and loaded with silver ions or silver nanoparticles

Abstract: The graft copolymerization of acrylamide, N-vinyl-2-pyrralidone and N, N’-methylene-bis-acrylamide was carried out to modify the sisal fiber to improve its mechanical and thermal stability. The grafting of poly-(acrylamide-co-N-vinyl-2-pyrrolidone) on sisal fiber surfaces facilitated the loading of Ag(I) ions and Ag(0) nanoparticles. Surface microstructure of the surface modified sisal fiber confirmed the grafting of the copolymer. The XRD and FTIR graphs also showed changes on grafting and on Ag(I) ions and the loading of Ag(0) nanoparticles. It is evident from the DSC curves that the initial thermal stability was improved by delaying the hemicellulose decomposition on grafting and silver ion loading.

The Effects of Combined Chemical Treatments on the Mechanical Properties of Three Grades of Sisal

Abstract: Different grades of sisal fibres (S3, STOW, and SUG) were immersed in five different treatment solutions: sodium hydroxide (NaOH) for 24 h; silane for 24 h; and NaOH followed by silane for 6, 12, and 24 h. The treated fibres were tested for bonding strength using the micro-droplet method. It was established that NaOH and silane treatments improved bonding strength with the unsaturated polyester resin that was used. However, it can be concluded that NaOH followed by silane (each for 6 h) produced the highest bonding strength compared with the other combined treatments. This is most likely because of fibre erosion caused by the chemicals in the other treatments, which causes fibres to lose the ability to bond with the resin. Fibres treated with silane had the highest bonding strength. The tensile mechanical properties, characterised using the single-fibre test method according to the ASTM standard C1557-03 (2008), showed that the NaOH treatment improved ultimate tensile strength, while the silane treatment decreased ultimate tensile strength for all sisal grades. Nevertheless, the ultimate tensile strength was reduced when the duration of the combined treatments was increased. The highest results for the mechanical properties were obtained from the combined treatments of NaOH followed by silane (each for 6 h).

Sisal hemp scraper device

Abstract: The utility model discloses a sisal hemp scraper device. The sisal hemp scraper device comprises a discharged sisal hemp conveying mechanism, a first sisal hemp clamping mechanism, a first tool ball mechanism, a second sisal hemp clamping mechanism and a second tool ball mechanism, wherein the first sisal hemp clamping mechanism is arranged on one edge of the discharged sisal hemp conveying mechanism so as to clamp the roots of sisal hemp leaves and forwards convey the sisal hemp leaves, the first tool ball mechanism is arranged at one side the stubs of the sisal hemp leaves which are clamped by the discharged sisal hemp conveying mechanism so as to scrape the stubs of the sisal hemp leaves, the second sisal hemp clamping mechanism is arranged at one side of the stubs of the sisal hemp leaves which are scrapped by the first sisal hemp clamping mechanism so as to clamp the fiber part of the scrapped stubs and forwards convey the fiber part, and the second tool ball mechanism is arranged at one side of the roots of the sisal hemps which are clamped by the second sisal hemp clamping mechanism so as to scrape the roots of the sisal hemp leaves. The sisal hemp scraper device improves the fiber extraction rate and the comprehensive quality of fibers, and lowers the production cost.

Knitted fabric containing bamboo fibers, sisal fibers and soybean protein fibers

Abstract: The invention provides a knitted fabric containing bamboo fibers, sisal fibers and soybean protein fibers. The knitted fabric containing the bamboo fibers, the sisal fibers and the soybean protein fibers comprises the following components, by weight, 45-55 parts of the bamboo fibers, 15-25 parts of the sisal fibers and 25-35 parts of the soybean protein fibers. The knitted fabric containing the bamboo fibers, the sisal fibers and the soybean protein fibers has the following technical advantages that the knitted fabric fully uses characteristics of different fibers so that the fibers can make up for deficiencies of one another and complement one another, and the product structure is optimized.