Showing papers on "SISAL published in 2019"
TL;DR: In this article, the authors reported the first time manufacturing of hybrid fiber reinforced biodegradable composites using sisal and hemp fiber with polylactic acid employing melt processing and injection molding techniques.
163 citations
TL;DR: In this paper, the effect of hybridization and chemical treatments on the mechanical properties of a novel intralaminar natural fibre hybrid composite was investigated, and it was found that the properties evaluated are significantly improved by addition of the natural fibres to pure jute based composites.
Abstract: The main objective of this work was to investigate the effect of hybridization and the effect of chemical treatments on the mechanical properties of a novel intralaminar natural fibre hybrid composite. Jute, sisal and curaua fibres were selected as natural fibre reinforcements for the epoxy matrix based composites which were produced by hand lay-up technique. The total volumetric fraction used in the fabrication of the hybrid composites was 30% of fibres and 70% of epoxy resin. Tensile, flexural and impact tests were carried out according to ASTM standards to characterize the novel hybrid composites. It was found that the mechanical properties evaluated are significantly improved by addition of the natural fibres to pure jute based composites. The fibre treatments had different effects on the mechanical properties of the hybrid composites. For sisal reinforced hybrid composites, the alkaline treatment had a positive impact on the composite properties (tensile, flexural and impact), while for the jute + curaua hybrid composites the alkali treatment had a negative effect on the tensile and impact properties. The mixed (alkalization + silanization) treatment had a positive effect on the jute + curaua flexural properties, while decreased the flexural properties for the jute + sisal composite. A scanning electron microscopy (SEM) was used to examine the fracture surface of the tested specimens.
122 citations
TL;DR: In the last decade, natural plant fibers (jute, sisal, coir, banana, hemp, kenaf, flax, etc.) are getting attention from many researchers and academicians to utilize it as an alternate reinforcemen.
Abstract: In the last decade, natural plant fibers (jute, sisal, coir, banana, hemp, kenaf, flax, etc.) are getting attention from many researchers and academicians to utilize it as an alternate reinforcemen...
117 citations
01 Jan 2019
TL;DR: Sisal fiber is one of the most promising reinforcements in polymer composites because of its higher tensile strength, modulus and impact strength as mentioned in this paper, and there has been growing interest in finding potential structural applications for using sisal fiber-based polymer composite, especially in automobile, marine, and aircraft structures.
Abstract: Growing awareness about eco-friendly materials and environmental regulations have encouraged researchers to use natural resources for structural applications. Natural fibers such as sisal, banana, kenaf, jute, and oil palm are abundantly available; they are cheap and possess superior mechanical properties. Sisal fiber is one of the most promising reinforcements in polymer composites because of its higher tensile strength, modulus and impact strength. Traditionally, sisal fibers were used to make ropes, fancy articles, carpets, etc. There has been growing interest in finding potential structural applications for using sisal fiber-based polymer composites, especially in automobile, marine, and aircraft structures. This chapter addresses developments in sisal fiber-based thermoset and thermoplastic composites and the effects of surface modifications through various treatments. This chapter also deals with the effects of sisal fiber hybridization with other plant and synthetic fibers on mechanical and physical properties.
94 citations
TL;DR: In this article, sisal-derived activated carbon fibers (SC) are obtained through a simple and convenient method using sisal, a natural biomass material, as a precursor, and the SC-750 has a high specific surface area (SBET: 2289 m2 g-1) and an optimized pore size distribution with a total pore volume of 1.23 cm3 g−1.
Abstract: The use of biomass porous carbon materials for energy storage has attracted tremendous attention in current research and has great applications in supercapacitors, lithium batteries, and fuel cells. In this work, sisal-derived activated carbon fibers (SC) are obtained through a simple and convenient method using sisal, a natural biomass material, as a precursor. SC-750 has a high specific surface area (SBET: 2289 m2 g–1) and an optimized pore size distribution with a total pore volume of 1.23 cm3 g–1. For supercapacitors, the obtained SC-750 exhibits excellent specific capacitance and cycle stability. The specific capacitance value is 415 F g–1 at 0.5 A g–1, and SC-750 shows a 93% capacitance retention after a long cycle (10,000 cycles) at 10 A g–1. In addition, the SC-750-based symmetric supercapacitor exhibits a high energy density of 11.9 Wh kg–1 in 6 M KOH electrolyte. Therefore, the results of this work demonstrate that sisal-derived activated carbon fiber has a great application value in supercapaci...
87 citations
TL;DR: Wang et al. as mentioned in this paper reported a general protocol to fabricate biomass carbon aerogel based on extraction of cellulose from the plant leaves, freeze-drying and carbonization of celluloses.
82 citations
TL;DR: The experimental results indicate that hybrid composites exhibited minor variation in tensile strength when the stacking sequence was altered, and the hybrid composite with the intercalated arrangement (HSHS) exhibited the highest tensile modulus when compared with the other hybrid counterparts.
78 citations
TL;DR: In this article, the authors compared the mechanical behavior of concretes reinforced with polypropylene and sisal fibers and found that the sisal fiber could provide the same level of residual strength as the Polypropylene fiber, as long as the equivalence of the dosages of the fibers is taken into account.
76 citations
TL;DR: In this paper, the authors presented the recyclability analysis of PLA/Sisal biocomposites comprising sodium bicarbonate treated Sisal fibers (30.5wt).
Abstract: This study presents the recyclability analysis of PLA/Sisal biocomposites comprising sodium bicarbonate treated Sisal fibers (30 wt%). The biocomposites were recycled (8 times) using the extrusion process. The tensile strength of injection molded biocomposites declined by 20.9% up to the third recycle. The dynamic mechanical analysis revealed a severe reduction in storage and loss modulus beyond third recycle. The morphological and thermal characterization of recycled biocomposites also revealed severe fiber and matrix degradation. The infrared spectroscopy exhibited hydrolysis as one of the causes of PLA degradation after recycling. The recycling of PLA/Sisal biocomposites beyond third recycle is not recommended. However, the biocomposites recycled up to third recycle can be used for making products for low to medium strength non-structural applications.
71 citations
TL;DR: The results showed that the incorporation of sisal fibers in the PP and PLA matrix enhances the tensile modulus and percentage crystallinity of the composites and the thermal stability of the PP-based composites was not affected by the repeated recycling process.
63 citations
TL;DR: In this paper, the influence of sisal fibres on impact resistance of structural concrete was investigated and the performance was compared with that of polypropylene (PP) and steel fibres.
TL;DR: In this article, a novel physical treatment (PLA coating) of sisal fibres and its influence on the water absorption, static and dynamic mechanical properties of its composites has been presented.
Abstract: In the present work, a novel physical treatment (PLA coating) of sisal fibres and its influence on the water absorption, static and dynamic mechanical properties of its composites has been presente...
TL;DR: In this paper, the experimental characterization of a Natural Fiber Reinforced Cementitious Matrix (NFRCM) made of sisal fibers yarns impregnated with a water-based resin and embedded in an inorganic matrix based on natural lime is presented.
TL;DR: A review on mechanical, micro-structural properties of Jute, Sisal and Kenaf is presented in this paper, where a literature survey has been done on these materials to make utilization of these natural fibers namely jute, sisal, kenaf, abaca banana, cotton, coir, hemp, and so on.
TL;DR: In this paper, the effect of rice husk fillers on physical, mechanical and sliding wear properties of on hybrid Bauhinia-vahlii-weight (BVW) and BVWS fibers reinforced hybrid composites was investigated.
Abstract: In this research, the effect of rice husk fillers were investigated on physical, mechanical and sliding wear properties of on hybrid Bauhinia-vahlii-weight (BVW) and Bauhinia-vahlii-weight/sisal (BVWS) fibers reinforced hybrid composites. The rice husk content was hybridized by loading variation of 0, 2, 4 and 6 wt% with 6 wt% BVW and combined 6 wt% BVW-Sisal fiber reinforced epoxy composites. The physical and mechanical properties like void fraction, water absorption, tensile strength, flexural strength, hardness, and impact energy in this research were found to be greatly influenced by rice-husk content. Moreover, the impact energy was found to be slightly decreased, owing to possible decrease in the deformability of the resin constituent. Rice husk filled BVWS composites exhibited improved tensile strength (34.42%), flexural strength (33%), and hardness (7.1%) as compared to BVW composites at all filler loading. The influence of selected control factors: sliding velocity, rice husk contents, normal load and sliding distance on specific wear rate of composites was investigated by Taguchi experimental design. Analysis of variance (ANOVA) was carried out to analyze the influence of each selected control factor on specific wear rate. The evaluated results demonstrate that rice husk content and sliding velocity were found to emerge the most noteworthy control factors among the others. Furthermore, the wear scars were analyzed by scanning electron microscopy to establish the governing wear mechanisms. This research established that the addition of rice husk fillers with optimum variation reflects the improvement in mechanical and wear performance of natural fiber based epoxy composites.
TL;DR: In this paper, the authors studied the mechanical properties of natural fiber composites in various fields of engineering due to their eco-friendly nature and low cost, and the present work is aimed in studying the mechanical pr...
Abstract: Natural fiber composites (NFCs) are gaining importance in various fields of engineering due to their ecofriendly nature and low cost. The present work is aimed in studying the mechanical pr...
TL;DR: In this paper, Bagasse ash (BGA) filled bio-composite were developed with the reinforced hybrid natural fibres sisal, flax, banana and kenaf to improve mechanical and thermal properties.
Abstract: Bagasse ash (BGA) filled bio-composite were developed with the reinforced hybrid natural fibres sisal, flax, banana and kenaf to improve mechanical and thermal properties. The vacuum bag assisted resin transfer method is used to develop hybrid natural fibres reinforced epoxy composites in combination of banana/flax (HBF), banana/kenaf (HBK), sisal/flax (HSF), and sisal/kenaf (HSK). A ball milled BGA of size 350 nm with a combination of 1, 3 and 5 wt% were incorporated in bio-composites to study its effects in thermal and mechanical properties. Characterization of BGA samples for its chemical composition were done through X-ray fluorescence spectroscopy and X-ray diffraction, thermal analysis through thermo-gravimetric and derivative thermo-gravimetric analysis results contemplated the application of BGA-B as filler in epoxy composites. Mechanical testing and thermogravimetric analysis were conducted to ascertain mechanical properties and thermal stability of composites. The significant improvement in flexural, tensile and impact strength was observed for HBF composite filled up to 3 wt% of BGA. Interestingly maximum flexural and tensile strength was observed for HBK composite filled up to 5 wt% of BGA. The enhanced impact strength was determined for HSF and HSK composites filled with 1 wt% of BGA. The highest thermal stability was ascertained for HBK composites filled up to 3 wt% BGA and HSK composites with 5 wt% BGA. Morphological analysis was performed to study the fractured surface of the specimen using a scanning electron microscope.
TL;DR: In this article, hybrid polymer composites of epoxy (E) reinforced with sisal (SF), banana (BF), coir (CF), and sisal/banana/coir (SBCF) fibers were fabricated by compression molding process.
Abstract: Recently, polymer composite materials are the most widely used elements in engineering applications. In this work, hybrid polymer composites of epoxy (E) reinforced with sisal (SF), banana (BF), coir (CF) and sisal/banana/coir (SBCF) fibers were fabricated by compression molding process. Five different kinds of laminates were prepared in the following stacking sequence of E, E/SF, E/BF, E/CF and E/SBCF of 30% SF,BF, CF with 70% of E and 10% of each fiber with 70% of E. Mechanical properties like tensile, flexural, impact and hardness strength in addition to water absorption test were evaluated and compared. Interfacial analysis was also carried out with the help of scanning electron microscope to study the micro-structural behavior of the tested specimen. The chemical formation of the new polymer composites and hybrid polymer composites was analyzed by means of Fourier-transform infrared spectroscopy technique additionally. The mechanical results showed that among these polymer composites, E/SF polymer composites were found to possess enhanced strength.
TL;DR: In this article, an attempt has been made to develop the properties of sisal/coir, Sisal/banana and banana/Coir based hybrid composite with addition of aluminium oxide (Al2O3) nano powder.
Abstract: In the current scenario, biosynthesis has a major trend in the world due to its eco-friendly approach, effectiveness and low cost. In this experiment Aluminium Oxide nano powder was extracted from ‘Muntingia Calabura’ leaf with aluminium nitrate as precursor. An attempt has been made to develop the properties of sisal/coir, sisal/banana and banana/coir based hybrid composite with addition of aluminium oxide (Al2O3) nano powder. Compression moulding technique was adapted to fabricate the epoxy based natural fiber composites. Nano Al2O3 powder was added in 0, 1, 2 and 3 wt%. The results demonstrate that addition of nano powder up to 3 weight (wt) percentage improvise the tensile, flexural and impact properties for all incorporated hybrid fibers. Residual wt% for sisal/coir, sisal/banana and banana/coir hybrid composites enhanced from 27.15 to 29.14, 26.07 to 31.33% and 23.76 to 27.50% by 3% nano substitution. Degradation temperature improved in different stages of hybrid combinations. Scanning electron microscope (SEM) images clearly showed the reduction of fiber breakage, matrix breakage and void gaps due to alumina nano powder addition.
TL;DR: In this article, the effect of silica microparticle inclusions and the stacking sequence of glass fibre cross-ply fabric and short sisal fibre layers on the apparent density, tensile and flexural strength and modulus of hybrid epoxy composites was investigated.
30 Jan 2019
TL;DR: In this article, the compressive behaviour of concrete confined by natural fibre-reinforced polymer (NFRP) jackets which are formed by embedding sisal fibres was investigated.
Abstract: This paper presents the results of an experimental study on the compressive behaviour of concrete confined by natural fibre-reinforced polymer (NFRP) jackets which are formed by embedding sisal fib...
TL;DR: In this paper, a hybridization of sisal with glass fiber reinforced composites has been proposed to improve the sound and flexural properties of the sisal fiber composite, including tensile strength, impact strength and impact strength.
TL;DR: In this paper, self-supported, sisal-coated supercapacitors are constructed for improving capacitance and cycle life of super capacitance of super-capacitor.
Abstract: Construction of reasonable nanostructures for electrode materials is regarded as one critical strategy for improving capacitance and cycle life of supercapacitors (SCs). Here, self-supported, sisal...
TL;DR: In this article, the results of a study about the mechanical behavior, before and after aging, of two cement-based composites reinforced with long sisal fibres cured at early age in a CO2 environment were presented.
Abstract: This paper presents the results of a study about the mechanical behaviour, before and after aging, of two cement-based composites reinforced with long sisal fibres cured at early age in a CO2 environment. After curing, samples of both composite systems were submitted to wetting and drying cycles to accelerate the aging of the materials allowing the evaluating of the efficiency of the CO2 treatment. Besides promoting CO2 capture, the used cure also allowed the increase in the durability of the sisal fibre-cement based composites by the Calcium Hydroxide (CH) consumption and pH decrease promoted by the carbonation reactions. The lime-pozzolanic material composite was also treated with CO2 at early stages of formation, with the carbonation and pozzolanic reactions acting simultaneously to deplete the Ca(OH)2 thus improving its durability. Four-point bending test, thermogravimetry analysis of the matrix and SEM analysis of the fibres were done before and after aging to study the durability mechanisms of the composites. The obtained results showed that the CH free cement-based composite containing metakaolin and fly ash presented the best mechanical behaviour before and after accelerated aging. The early age carbonation of the lime-pozolan composites improved its mechanical response, before and after accelerated aging, when compared with the non-carbonated samples. The thermogravimetry test showed that the increase of the carbonation time of the reference Portland cement-based composite consumed the C S H, compromising the ductility and strain capacity of this composite family after aging. The SEM pictures showed petrified fibre effect by the migration of hydrated products after 10 and 20 cycles of ageing for this composite system.
TL;DR: In this article, the sisal fibers were modified by tetraethylorthosilicate (TEOS) sol-gel method to form SiO2-based organic-inorganic hybrid materials.
TL;DR: In this article, the nano powder synthesized from the Neem leaf is used in sisal, coir and banana fiber composites for betterment of mechanical and thermal applications.
Abstract: In the present environmental conditions bio usages has a vital importance in the society due to global warming and other environmental threats. In this work, alumina nano powder synthesized from ‘Neem’ leaf’ is used in sisal, coir and banana fiber composites for the betterment of mechanical and thermal applications. Thermo gravimetric analysis (TGA) contemplated biosynthesized alumina nano powder (BSANP-C) has better thermal stability than other nano powders. The mechanical results verified the enhancement of tensile, flexural and impact strength for hybrid banana coir (HBC), hybrid sisal coir (HSC) and hybrid sisal banana (HSB) composites up to 3% BSANP-C addition. Hybrid combination at 5% nano substitution tends to decrease the mechanical properties of hybrid composites due to agglomeration of BSANP-C making uneven mixing of filler in the matrix. The addition of BSANP-C wt% up to 3 in HBC, HSC and HSB ascertain residual % improvement from 18.72 to 23.41%, 21.90 to 25.75% and 22.69 to 26.33%. BSANP-C addition at 5% decreased the degradation temperature, char residual % and endothermic peak due to agglomeration. SEM test was taken for morphological study of fractured surface of the hybrid composites.
TL;DR: In this paper, a thermoplastic-penetrated natural fiber belt was developed for potential application in filament winding, where sisal fiber bundles were impregnated with high density polyethylene and then connected into continuous pre-pregs via hot-pressing.
Abstract: A thermoplastic-penetrated natural fiber belt was developed for potential application in filament winding. Discontinuous sisal fiber bundles were impregnated with high density polyethylene and then connected into continuous pre-pregs via hot-pressing. The interfacial bonding was improved by treating the fibers with sodium hydroxide (NaOH) and three types of coupling agents (NH2C3H6Si(OC2H5)3, C2H3Si(OC2H5)3 and C51H112O22P6Ti). Tensile properties of the fiber bundles, pre-pregs, and annular specimens were determined. The fiber surface microstructure and the pre-preg interfacial bonding were evaluated via scanning electron microscopy and Fourier transform infrared spectroscopy. Among the four treatments, 2% C2H3Si(OC2H5)3 yielded the most significant improvement in the tensile properties of the pre-pregs and annular specimens. The fiber bundle was less damaged by the coupling agents treatment comparing to NaOH treatment. When the overlap at the end of the sisal fibers was >11 mm, the presence of the joint had no effect on the tensile strength of the pre-preg. The pre-preg belt containing treated fibers, which was evaluated based on the requirements of filament winding applications, exhibited a high performance.
TL;DR: In this article, sisal cellulose/magnetite-nanoparticle (Fe3O4 NPs; 0.5, 1.4, and 3.0, respectively) were prepared by casting, using the solvent system LiCl/DMAc.
Abstract: In this study, sisal cellulose/magnetite-nanoparticle (Fe3O4 NPs; 0.5, 1.4, and 3.0 g L−1) hybrid films (denoted as FCFe0.5, FCFe1.4, and FCFe3.0, respectively) were prepared by casting, using the solvent system LiCl/DMAc. Sisal was chosen as a cellulose source because it is a fast-growing plant, in contrast to the long cycle of woody trees, and Brazil accounts for most of the sisal produced in the world. Fe3O4 NPs were chosen owing to their excellent properties (superparamagnetic behavior at room temperature, high chemical stability, and low toxicity). The synthesized magnetite NPs (coated with oleic acid and oleylamine to prevent agglomeration during synthesis) were spherical with an average diameter of 5.1 ± 0.5 nm (transmission electron microscopy analysis; TEM). X-ray diffraction analysis showed that the NPs were satisfactorily incorporated into the cellulose films (as confirmed by TEM) and that their presence favored the formation of cellulose crystalline domains. FCFe1.4 and FCFe3.0 exhibited higher tensile strengths (14.3 MPa and 12.1 MPa, respectively) than the neat cellulose film (9.9 MPa). The moduli of elasticity of FCFe0.5, FCFe1.4, and FCFe3.0 were 1650, 1500 MPa, and 780 MPa, respectively, lower than that of the cellulose film (1860 MPa), indicating that the incorporation of NPs in the cellulosic matrix decreased the films’ stiffness. Hybrid films exhibited high magnetizations at 300 K, i.e., 23.0 emu g−1 (FCFe0.5), 31.0 emu g−1 (FCFe1.4), and 37.0 emu g−1 (FCFe3.0), as well as no magnetic hysteresis and remanent magnetization (Mr) null, namely, a superparamagnetic behavior at room temperature. The results obtained suggest several applications of hybrid films based on cellulose and magnetite, such as biomedical applications, miniaturized electronic devices, and advanced catalysis.