SISAL

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

Effect of alkali treatment, fiber loading and hybridization on tensile properties of sisal fiber, banana empty fruit bunch fiber and bamboo fiber reinforced thermoset composites

Abstract: Nowadays natural fibers such as sisal, flax, hemp, jute, bamboo, banana, etc. are widely used for environmental concern on synthetic fibers (such as glass, carbon, ceramic fibers, etc.). In this research work, Sisal Fiber (SF), Banana Empty Fruit Bunch Fiber (BEFBF) and Bamboo Fibers (BF) reinforced with Epoxy matrix composites have been developed by manual hand layup technique with varying process parameters, such as fiber condition (untreated and alkali treated), fiber percentages (5%, 10%, 15%, 20%, 25% and 30% by weight) and various hybrid combinations (Sisal-Banana, Sisal-bamboo and Banana-Bamboo). The developed Sisal fiber, Banana empty fruit bunch fiber and Bamboo fiber reinforced composites were then characterized by tensile test and scanning electron microscopy. The results show that tensile strength increases with the fiber percentage; however, after a certain percentage of fiber reinforcement, the tensile strength decreases. Compared to untreated fiber a significant change in tensile strength has been observed for surface treated fiber composites. Also hybridization of the fibers shows an increase in the tensile strength as compared with pure Epoxy (matrix). Index Terms: Sisal fiber (SF), Banana Empty Fruit Bunch Fiber (BEFBF), Bamboo Fibers (BF), Epoxy, surface treatment, Hybrid composite, Tensile Strength.

Thermal performance of sisal fiber-cement roofing tiles for rural constructions

Abstract: Roofing provides the main protection against direct solar radiation in animal housing. Appropriate thermal properties of roofing materials tend to improve the thermal comfort in the inner ambient. Nonasbestos fiber-cement roofing components reinforced with cellulose pulp from sisal (Agave sisalana) were produced by slurry and dewatering techniques, with an optional addition of polypropylene fibers. Nonasbestos tiles were evaluated and compared with commercially available asbestos-cement sheets and ceramic tiles (frequently chosen as roofing materials for animal housing). Thermal conductivity and thermal diffusivity of tiles were determined by the parallel hot-wire method, along with the evaluation of the downside surface temperature. Cement-based components reinforced with sisal pulp presented better thermal performance at room temperature (25oC), while those reinforced with sisal pulp added by polypropylene fibers presented better thermal performance at 60oC. Non-asbestos cement tiles provided more efficient protection against radiation than asbestos corrugated sheets.

Carbon fiber reinforced carbon composites from renewable sources

Abstract: Thermoset polymers (phenolic and lignophenolic) are used as matrix materials for polymeric composites. A great deal of effort has been done in order to use vegetal fibers, obtained from sugarcane bagasse and sisal, to reinforce such matrices, because they are readily available and they are renewable resources. Carbon reinforced materials are usually obtained by using high strength carbon fibers for high-tech demanding aerospace and aeronautical uses. Phenolic type resins are commonly used as carbon matrix source for such applications. In this work a reinforced carbon material is obtained by a controlled pyrolysis from lignophenolic matrix/bagasse and lignophenolic/sisal polymeric composites. The ex-vegetable fibers carbon composites were analyzed by flexural tests. The conversion of the vegetable fiber into a carbon fiber takes place in situ all over the matrix material resulting in carbon reinforced materials having a flexural strength as high as 21 MPa and flexural modulus in the range of 11–13...

Facile preparation of sisal–Fe/Zn layered double hydroxide bio-nanocomposites for the efficient removal of rifampin from aqueous solution: kinetic, equilibrium, and thermodynamic studies

Abstract: Abstract In the present study, sisal–Fe/Zn LDH bio-nanocomposite for efficiently removing rifampin was synthesized using a simple co-precipitation method. SEM, XRD, and FTIR analyses were applied to characterize the prepared composite. In the following, different factors that are affecting the adsorption of rifampin, including contact time, initial rifampin concentration, adsorbent dosage, and temperature were evaluated. Also, the kinetic, isotherm, and thermodynamic studies were investigated. The results indicated that Freundlich (R 2 = 0.9976) was a suitable model for describing the adsorption equilibrium and adsorption kinetic showed that the data are in maximum agreement with the pseudo-second-order kinetic model (R 2 = 0.9931). According to the Langmuir isotherm model, the maximum adsorption capacity of rifampin was found to be 40.00 mg/g. The main mechanisms for rifampin elimination were introduced as electrostatic attraction and physical adsorption. Moreover, the spontaneity and nature of the reaction were analyzed by elucidating thermodynamic factors that indicated the adsorption process was exothermic and spontaneous. Also, the batch process design indicated that for treating 10 L wastewater containing 100 mg/L rifampin with a removal efficiency of 96%, the needed amount of sisal–Fe/Zn LDH is 51.6 g. This study revealed that the sisal–Fe/Zn LDH bio-nanocomposites as a low-cost adsorbent have promising adsorption potential. Novelty statement In this study, an innovative bio-nanocomposite (sisal–Fe/Zn layered double hydroxide) has been synthesized using a co-precipitation method for the first time and was used for the removal of pharmaceutical pollutants. Sisal–Fe/Zn LDH exhibited an excellent adsorption capacity of 40.00 mg/g to remove rifampin from the aqueous solution. The main mechanisms for rifampin elimination were introduced as electrostatic attraction and physical adsorption. Also, the batch process design showed that for treating 10 L wastewater containing 100 mg/L rifampin with a removal rate of 96%, the amount of sisal–LDH bio-nanocomposite required is about 51.6 g. Therefore, sisal–Fe/Zn layered double hydroxide as an eco-friendly biosorbent can be considered for future water treatment. Graphical Abstract