Showing papers on "SISAL published in 2020"
TL;DR: In this paper, the properties of high calcium fly ash geopolymer mortars containing natural fibers were investigated, and the addition of natural fiber (sisal and coconut fibers) as reinforcing materials resulted in significant improvement in tensile and flexural strength performances similar to the use of glass fiber.
95 citations
TL;DR: In this article, a thermal conductivity test, scanning electronic microscope tomography (SEM) and microscopic images for interfacial bonding of fibers with concrete were performed for plain concrete and natural fibres light weight reinforced concrete (RC) samples.
Abstract: The building insulation is one of the needed element or component in building construction; it protects the construction against heat leakage for saving energy. The current research work aims to utilize natural fibers in concrete and develop such type of environmentally friendly material that has better thermal insulation properties. Thermal conductivity test, scanning electronic microscope tomography (SEM) and microscopic images for interfacial bonding of fibers with concrete were performed for plain concrete and natural fibres light weight reinforced concrete (RC) samples. Thermo-gravimetric analysis (TGA) was performed to check the thermal stability of natural fibres RC. The compressive strength was also measured to investigate the mechanical cost at which thermal insulation is achieved. Thermal conductivity results showed that by increasing the percentage of natural fibres (Jute, Coconut, Sugar cane, Sisal, Basalt) in concrete the thermal insulation characteristics increased while compressive strength decreased. TGA indicated that Jute, Sugarcane and Basalt fibres RC have better thermal stability as compared with plain concrete up to 50 °C which is suitable for South Asian countries climate but Sisal and Coconut fibres reinforced samples have comparatively a bit lower thermal stability. However, at 2.5% mixing of coconut and jute we were able to achieve improvement in both compressive strength and thermal insulation.
58 citations
TL;DR: In this article, the effect of the fiber type and content on the mechanical properties of the resulting geopolymer composites was evaluated by three-point bending tests, and the results of compression and splitting tensile tests showed the existence of an optimum fiber content that depends on the fiber types for reaching the maximum strength.
57 citations
TL;DR: The mechanical properties of intralaminar natural fiber-reinforced hybrid composites based on sisal are improved by hybridization of sisal based composites and the thermal analysis showed that the hybridization did not significantly affect the thermal stability of the composites.
Abstract: The main objective of this work was to investigate the effect of hybridization on the mechanical and thermal properties of intralaminar natural fiber-reinforced hybrid composites based on sisal. Ramie, sisal and curaua fibers were selected as natural fiber reinforcements for the epoxy matrix based composites, which were produced by the hand lay-up technique. Tensile, flexural and impact tests were carried out according to American society for testing and materials (ASTM) standards to characterize the hybrid composites, while differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) were used to evaluate the thermal properties. It was found that the mechanical properties are improved by hybridization of sisal based composites. The thermal analysis showed that the hybridization did not significantly affect the thermal stability of the composites. A scanning electron microscopy (SEM) was used to examine the fracture surface of the tested specimens. The SEM images showed a brittle fracture of the matrix and fiber breakage near the matrix.
52 citations
51 citations
TL;DR: In this article, the mechanical and morphological properties of sisal/bagasse fibers reinforced epoxy composites were investigated by hand layup process in four differencing regions.
Abstract: The current study deals with the mechanical and morphological properties of sisal/bagasse fibers reinforced epoxy composites. The composites were developed by the hand layup process in four differe...
49 citations
TL;DR: In this article, the tensile, flexural, impact and hardness properties of sisal, jute, and sisal fiber reinforced with polyester composites are described for the first time.
Abstract: In the present work tensile, flexural, impact and hardness properties of sorghum bicolor, sisal fiber and jute reinforced with polyester composites are described for the first time. The hybrid composite plates are fabricated for different fiber weights by hand lay-up method. To investigate the mechanical attributes tensile, flexural, impact and hardness tests were performed as per ASTM standard. The mechanical test results revealed a regular trend of an increase in tensile, flexural, impact and hardness properties to adding natural fibers. Good adhesion between the natural fibers and the polyester matrix is also responsible for the effective resistance capability. Further, thermal stability and thermal decomposition of the composite material observed by thermogravimetric analysis (TGA) and differential thermal analysis (DTA). The work concludes that sisal, jute, and sorghum bicolor fiber have high potential as reinforcement for composite production. This type of composite material can be useful for automobiles, industrial applications and construction fields.
47 citations
TL;DR: In this article, the effect of chemical treatment on sisal fiber strength and fiber-matrix interaction was evaluated using single fibre pull-out (SFP) tests and it was found that a combination of alkali treatment and acetylation was the most effective treatment condition, followed by that of alkaline treatment at low concentrations of sodium hydroxide.
46 citations
TL;DR: Modelled cellulosic sisal fibre was modified simultaneously by polypyrrole-polyaniline nanoparticles and it was employed as a cost-effective, non-toxic nano bio-composite for the elimination of ibuprofen.
45 citations
TL;DR: In this article, sisal/kenaf fiber reinforced with polypropylene polysilicon was used to improve the strength of the sisal fiber. But, the performance of the polypropane fiber was limited.
Abstract: In recent years, natural fibers have been used more frequently for their lower weight to strength ratio, low cost, and environmental-friendly attributes. In this work, sisal/kenaf fiber reinforced ...
40 citations
TL;DR: Sisal fibers were employed as cost-effective adsorbent material to remove methylene blue (MB) and reactive black 5 (RB5) dyes from aqueous solutions as discussed by the authors.
Abstract: Sisal fibers were employed as cost-effective adsorbent material to remove methylene blue (MB) and reactive black 5 (RB5) dyes from aqueous solutions. The fibers were characterized and the effects o...
TL;DR: It is revealed that the addition of sisal and coconut coir fiber can enhance the properties of the natural fibres reinforced polyester composites.
01 Mar 2020
TL;DR: In this article, a new technique based on statistical analysis of variance (ANOVA) by using the properties of the individual fiber composites was used to deal with the fabrication and investigation of hybrid natural/natural fibre composites.
Abstract: Natural fibre composites are a class of materials that are currently replacing the synthetic fibre composites for practical applications. This paper deals with the fabrication and investigation of hybrid natural/natural fibre composites obtained by a new technique based on statistical analysis of variance (ANOVA) by using the properties of the individual fibre composites. The influences of type of fibres, such as flax, jute and sisal, the type of chemical treatment and the volume fraction of fibre on the mechanical properties such as tensile strength, tensile modulus, flexural strength and flexural modulus of the composites, were evaluated. Mathematical models for mechanical properties were developed using the response surface methodology (RSM). Statistical analysis of the results showed that the mechanical properties are influenced principally by the volume fraction of fibre, then the type of fibres. On the opposite side, the type of chemical treatment has a very weak significance effect. Then, the best mechanical proprieties of composites were achieved at the highest volume fraction of fibre and when used the sodium bicarbonate NaHCO3 for treated fibres. Finally, the developed hybrid composite exhibited superior properties compared to the previous composites based on individual fibre composites when the fibre content is at 80 wt% of jute and 20 wt% of flax.
TL;DR: Among the various composites studied, sisal/kenaf/sisal hybrid epoxy composites showed the best properties and retained the thermo-mechanical properties with the lowest water absorption properties even after the weathering test.
Abstract: Epoxy-based biocomposites are a good alternative for metals in lightweight applications. This research has been focused on the effect of accelerated weathering on the mechanical, thermal, contact angle, and water absorption behavior of neat epoxy, individual kenaf and sisal, and kenaf/sisal hybrid epoxy composites. The composite was fabricated by hand layup method. Among the various composites studied, sisal/kenaf/sisal hybrid epoxy composites showed the best properties and retained the thermo-mechanical properties with the lowest water absorption properties even after the weathering test. Thus, composites with hybridized kenaf and sisal with sisal outer layer are encouraging semistructural materials in outdoor applications.
TL;DR: In this paper, a low-velocity impact tests campaign was conducted on various green epoxy/sisal laminates, by varying the main influence parameters such as reinforcement distribution, fiber volume fraction and lay-up.
TL;DR: In this paper, the authors have created composites of glass-jute-tea leaf fiber-reinforced polymers and assessed their mechanical characteristics such as tensile, flexural and impact test.
TL;DR: In this article, a sisal composite with polypyrrole/polyaniline via in-situ chemical oxidative polymerization technique was used for reactive orange 5 elimination from aqueous media.
Abstract: Sisal is a natural fibrous low-cost biomaterial that is frequently found in the surrounding environment and has no toxic effects. To upgrade its performance and applicability, sisal was modified with polypyrrole/polyaniline via in-situ chemical oxidative polymerization technique for reactive orange 5 elimination from aqueous media. Nowadays, dye pollution and its subsequent adverse effects have been of great concern for all around the world. The prepared composite was characterized by SEM, FTIR, and XRD analysis; they indicated that the polypyrrole and polyaniline were successfully coated on sisal. Optimum contact time was found at 120 min, and at the adsorbent dosage of 200 mg, almost 97 % of dye was removed. At low dye concentration (5−10 ppm), the efficiency of the sorption system was significantly acceptable (99 %). pH 2 had the maximum adsorption capacity due to attraction between negatively charged dye and positive nature of sisal composite. In view of thermodynamics, the process was endothermic and so better removal was observed at 45 °C. Langmuir/Freundlich and Pseudo-second order could satisfactorily expound the sorption system with R2 values of greater than 0.99, exhibiting that physisorption/chemisorption occurred. Sisal/polypyrrole/polyaniline was more than 5.69 times effective than raw sisal for dye adsorption. In the case of synthetic wastewater, the removal efficiency reached 81 %. Hence, the low-cost sisal/polypyrrole/polyaniline composite was a promising alternative for reactive orange 5 removal.
TL;DR: The influence rule of the content ratio of cellulose, hemicellulose, and lignin on the tensile strength of sisal fibers (SFs) and the interfacial strength of SFs and poly lactic acid (PLA) is discussed in this paper.
Abstract: The influence rule of the content ratio of cellulose, hemicellulose, and lignin on the tensile strength of sisal fibers (SFs) and the interfacial strength of SFs and poly lactic acid (PLA) ...
TL;DR: In this paper, sisal and coir fiber-based epoxy composites were fabricated using compression molding route and multi-response optimization using GRA showed significance of both the fibers in enhancing mechanical properties.
Abstract: In this study, sisal and coir fiber-based epoxy composites were fabricated using compression molding route. Optimization technique using Taguchi and grey relational analysis (GRA) was employed to find the best condition for tensile, flexural and impact properties. Sisal (0–20 wt%), coir fibers (0–20 wt%), NaOH treatment (0–8 wt%), compression pressure (10–16 MPa) and temperature (100–120 °C) are the different factors with various levels. Multi-response optimization using GRA showed significance of both the fibers in enhancing mechanical properties. The response table of GRA concluded that combination of sisal 20%/coir 15%/NaOH treatment 5%/compression pressure 10 MPa and temperature 120 °C has the best mechanical results. SEM images indicated the advancement in adhesion of reinforcement and epoxy resin by hybridization of fibers. The artificial neural network (ANN) prediction states predicted and experimental values for various trials are almost same, and regression graph showed a straight line with R-value 97.321%. These fabricated composites can be used in aerospace and automobile industries for their interior parts.
29 Oct 2020
TL;DR: In this paper, the sisal fiber is treated with specific concentration of sodium oxidanide in distilled water and the bio epoxy is employed as matrix material with mix of hardener.
Abstract: Materials are indispensible but the supply is limited. In particularly, the supply of material is limited for specific applications. Light weight low strength applications are very wide. This investigation focuses the natural fibre hybrid with artificial fiber based hybrid composite preparation. The sisal fibre is used to prepare the composite with glass fibre. The sisal fiber is here treated with specific concentration of sodium oxidanide in the distilled water. The composites synthesized with treated and untreated sisal fibres. The alternate fashion of horizontal and vertical is followed for fibres’ orientation. The bio epoxy is employed as matrix material with mix of hardener. The prepared composite are characterized by water absorbability, tensile properties, flexural properties and shock absorption capacities. The synthesized composites also characterized for dry and wet applications.
TL;DR: In this paper, the authors deal with the fabrication of hybrid composites and mechanical properties are tensile, flexural, compression strength and impact of sisal fiber and jute fiber combination.
TL;DR: In this paper, chemically synthesized titanium oxide (TiO2) nano-powder was utilized for upgrading mechanical and vibrational applications of pineapple, banana and sisal fibers, and the substitution of TiO2 upto 3% enhanced the tensile, impact and flexural strength of the composites with improved natural frequency.
Abstract: In this research, chemically synthesized titanium oxide (TiO2) nano-powder was utilized for upgrading mechanical and vibrational applications of pineapple, banana and sisal fibers. The substitution of TiO2 upto 3% enhanced the tensile, impact and flexural strength of pineapple/sisal, sisal/banana and banana/pineapple hybrid combinations. Irregular dispersion of nano-filler at 4% degrades the mechanical stability of bio-composites. Pineapple and sisal hybrid combinations with 3% TiO2 filler has the highest natural frequency due to excellent surface contact with resin/hybrid natural fibers and filter/resin interface making higher stiffness to the composites with improved natural frequency. Natural frequency and damping properties enhanced with nano-filler mixing. The factors such as frictional properties and energy dissipation at maximum strain area in the filler make increment in the damping nature of the natural composites. In the equal fiber weight% of 35, pineapple-based hybrid composites make better damping rate by the higher interface thickness and smaller diameter of pineapple fiber than other two fibers.
TL;DR: In this paper, the effect of fiber weight percentage and dynamic frequency on dynamic mechanical properties of the sisal composites was studied, and it was also observed that fabric density also plays a significant role in the enhancement of the storage and loss modulus.
Abstract: Due to low cost and environmentally friendly characteristics, natural fibers gain much attention over synthetic fiber. The aim of the present work is to characterize the textile properties of three different types of sisal fabric and study dynamic mechanical properties and water absorption behavior of the sisal fabric reinforced epoxy composite. Influence of grams per square meter of fabric, weaving pattern of the fabric on textile properties of the fabric is studied first. Further, the effect of the same on the dynamic mechanical properties of the sisal composites is studied. Effect of fiber weight percentage and dynamic frequency on dynamic mechanical properties also studied. Results reveal that the storage modulus (G′) decreases with increasing temperature in all the woven types of composites under consideration. However, Plain 2 (P2) and Weft Rib (WR) composites have shown better values of G′ even after the glass transition temperature (Tg). From the results, it is also evident that storage and loss modulus (G′′) increases when the yarn diameter decreases which is observed at a higher temperature also. It is also observed that fabric density also plays a significant role in the enhancement of G′ and G′′ values. The water absorption of Plain 1 (P1) based composites are found to be less compared to the other types of composites analyzed.
TL;DR: In this article, the authors investigated factors contributing mechanical stability of epoxy based composites using Taguchi optimization based grey relational approach and found that natural fibers of sisal, banana reinforce the composites.
Abstract: This research investigates factors contributing mechanical stability of epoxy based composites using Taguchi optimization based grey relational approach. Natural fibers of sisal, banana reinforceme...
TL;DR: In this paper, an attempt was made to improve the mechanical properties of the coir fiber reinforced epoxy composites through addition of high strength sisal and palmyra palm fibers.
Abstract: In the present work, an attempt was made to improve the mechanical properties of the coir fiber reinforced epoxy composites through addition of high strength sisal and palmyra palm fibers. The hybr...
TL;DR: This article describes how new bio-based polyol during the liquefaction process can be obtained and the process of manufacturing polyurethane materials and the impact of two different types of fibers—synthetic and natural (glass and sisal fibers)—on the properties of composites.
Abstract: This article describes how new bio-based polyol during the liquefaction process can be obtained. Selected polyol was tested in the production of polyurethane resins. Moreover, this research describes the process of manufacturing polyurethane materials and the impact of two different types of fibers-synthetic and natural (glass and sisal fibers)-on the properties of composites. The best properties were achieved at a reaction temperature of 150 °C and a time of 6 h. The hydroxyl number of bio-based polyol was 475 mg KOH/g. Composites were obtained by hot pressing for 15 min at 100 °C and under a pressure of 10 MPa. Conducted researches show the improvement of flexural strength, impact strength, hardness, an increase of storage modulus of obtained materials, and an increase of glass transition temperature of hard segments with an increasing amount of fibers. SEM analysis determined better adhesion of sisal fiber to the matrix and presence of cracks, holes, and voids inside the structure of composites.
TL;DR: In this paper, the ultrasonic vibration was used in mixing the nano-silica in polyester resin in which ultrasonic frequency of 15 kHz and with an 800 W power capacity was used.
Abstract: In the fabrication of Sisal/Kevlar/Nano-silica reinforced polyester composites, the ultrasonic vibration was used in mixing the Nano-silica in polyester resin in which ultrasonic frequency of 15 kHz and with an 800 W power capacity was used. For uniform mixing of the nanoparticle in resin, an Ultrasonic probe was used. The Mechanical Properties of Sisal/Kevlar fiber, which are in mat form reinforced with polyester/Nano-silica, have been characterized. These composites have been fabricated using hand lay-up techniques by different wt.% of Nano Silica and different stacking sequences of fiber. The different wt.% are 2, 4, and 6 wt.%, and different stacking sequences are KSKS, SKKS, KSSK. The impact of the sonication effect on the mechanical properties was examined and compared. The addition of 4 wt% of Nano-silica in KSSK reported an increase of 23% of tensile strength, and 36% of flexural strength was observed. In KSKS, hybrid composites due to 4 wt.% silica addition 33% in tensile strength and 37% of flexural strength increases are found. The maximum tensile strength is obtained at 4 wt.% of Nano silica-reinforced with polyester with the stacking sequence KSSK and maximum flexural strength at 4 wt.% of Nano- silica with the stacking sequence KSKS. SEM analysis is also carried for the tested samples for failure analysis.
TL;DR: In this paper, a facile strategy was proposed that combines continuous steam explosion (CSE) with periodate oxidation/borohydride reduction to modify sisal fibers, and the results indicated that CSE pretreatment was favorable for improving the modification efficiency and uniformity of sisal fiber.