SISAL

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

Effect of surface treatments on the cross-section area and on the tensile properties of sisal fibers

Abstract: This work deals with the effect that surface treatments can cause on the cross-section and on the tensile properties of sisal fibers. The simplest treatment of washing in tap water, at room...

Preparation of Biocomposite Material with Superhydrophobic Surface by Reinforcing Waste Polypropylene with Sisal (Agave sisalana) Fibers

Abstract: Nowadays, eco-friendly, renewable, and biodegradable biocomposites are among the most intensely sought materials of choice. Biocomposites have been widely used as substitutes for plastics due to their biodegradability. However, biocomposite materials absorb water and ultimately loss mechanical properties that affect service life. In this work, a biocomposite material with superhydrophobic surface was prepared by reinforcing waste polypropylene with sisal (Agave sisalana) fibers. The biocomposite was prepared by mixing waste polypropylene and sisal fiber with 5%, 10%, 15%, and 20% fiber loading. Based on characterization results, the composite with 15% fiber content is considered as optimum ratio. Physicochemical properties of composites were evaluated using standard American Society of Testing Materials including biodegradability test and chemical resistance test. The biodegradability of the composite before surface modification was determined by calculating weight loss and found to be 0.11%, 4.62%, 7.15%, and 10.97% for 0%, 5%, 10%, and 15% fiber loadings, and their tensile strength was 10:25 ± 0:05, 14:47 ± 0:02, 14:48 ± 0:02, and 19:90 ± 0:09MPa for 0%, 5%, 10%, and 15% fiber content, respectively. The surface of the composite was modified for hydrophobicity by etching the surface with chromic acid followed by treating with stearic acid. The FTIR and the SEM images of unmodified and modified (superhydrophobic) surface of composites clearly state the significant difference in chemical composition and surface structure, respectively. The superhydrophobicity of the surface-modified biocomposite was defined by its self-cleaning and low wet ability properties.

Preparation method of SiO2 coated sisal cellulose crystallites and application thereof

Abstract: The invention discloses a preparation method of SiO2 coated sisal cellulose crystallites and an application thereof The preparation method comprises the following steps: by taking sisal as the raw material, preparing sisal cellulose crystallites by the methods of pretreatment, alkali treatment and acid treatment, and obtaining the SiO2 coated sisal cellulose crystallites by hydrolyzing SiO2 by a hydrothermal method and coating the surface of the sisal cellulose crystallites with the hydrolyzed SiO2; mixing an appropriate amount of SiO2 coated sisal cellulose crystallites with epoxy resin, and curing to obtain an epoxy resin hybrid material modified by the SiO2 coated sisal cellulose crystallites, wherein the epoxy resin hybrid material has excellent overall performance The raw materials for the preparation method to prepare the sisal cellulose crystallites are wide in source, cheap and easy to get; the preparation method is easy to operate, and simple in process; the preparation of the SiO2 coated sisal cellulose crystallites is realized, so that the synergistic effect of the sisal cellulose crystallites and the SiO2 is achieved; the SiO2 coated sisal cellulose crystallites are evenly dispersed in an epoxy resin matrix, and have good compatibility with the matrix resin; and furthermore, the SiO2 coated sisal cellulose crystallites have an obvious toughening modification effect on the epoxy resin

Post-cracking behavior of blocks, prisms, and small concrete walls reinforced with plant fiber

Abstract: Structural masonry using concrete blocks promotes the rationalization of construction projects, lowering the final cost of a building through the elimination of forms and the reduction of the consumption of reinforcement bars. Moreover, production of a block containing a combination of concrete and vegetable fiber sisal results in a unit with properties such as mechanical strength, stiffness, flexibility, ability to absorb energy, and post-cracking behavior that are comparable to those of a block produced with plain concrete. Herein are reported the results of a study on the post-cracking behavior of blocks, prisms, and small walls reinforced with sisal fibers (lengths of 20 mm and 40 mm) added at volume fractions of 0.5% and 1%. Tests were performed to characterize the fibers and blocks and to determine the compressive strength of the units, prisms, and small walls. The deformation modulus of the elements was calculated and the stress-strain curves were plotted to gain a better understanding of the values obtained. The compression test results for the small walls reinforced with fibers were similar to those of the reference walls and better than the blocks and prisms with added fibers, which had resistances lower than those of the corresponding conventional materials. All elements prepared with the addition of sisal exhibited an increase in the deformation capacity (conferred by the fibers), which was observed in the stress-strain curves. The failure mode of the reference elements was characterized by an abrupt fracture, whereas the reinforced elements underwent ductile breakage. This result was because of the presence of the fibers, which remained attached to the faces of the cracks via adhesion to the cement matrix, thus preventing loss of continuity in the material. Therefore, the cement/plant fiber composites are advantageous in terms of their ductility and ability to resist further damage after cracking.