Leaf Fiber Research Articles

Evaluation of the physical, mechanical, water absorption, and tribological behavior of pineapple leaf fiber/roselle fiber reinforced vinyl ester hybrid composites for non‐structural applications

AbstractNatural fiber‐based polymer composites have greater advantages due to their superior mechanical properties and environmentally friendly nature. In the present study, pineapple leaf (PALF) and roselle fiber (RSF) reinforced vinyl ester hybrid composites were fabricated by the hot compression molding method, and their physical properties, mechanical properties, water absorption rate, and tribological behavior were investigated and analyzed. This research investigation has been conducted to reveal a significant hybrid of natural fiber reinforced polymer composites for commercial engineering applications. Mechanical properties were examined for their tensile, flexural, compression, hardness, and impact properties. Moreover, the fractured surfaces of the tensile specimen were analyzed using a scanning electron microscope. Water absorption behaviors were then accomplished by immersing the composite samples in standard distilled water and analyzing the water penetration percentage. The tribological behavior was simply studied by using a pin‐on‐disc tribometer apparatus to evaluate the specific wear rate and coefficient of friction. From the results, it was concluded that the hybrid composites provided higher results in all kinds of formats when compared with single‐fiber composites. Among the hybrid composites, the 24PALF/16RSF/60VE sample was particularly promising for its improvement in mechanical properties of 103.9% tensile strength, 109.7% flexural, 26.2% compression, 56.9% impact, and 113.5% hardness compared to the neat resin sample. Thus, the results illustrate that the hybridization of PALF and RSF fibers with a vinyl ester matrix generates enhanced mechanical behaviors, which indeed make it desirable for use in non‐structural electrical and electronics insulation board and component applications.

Transmission of Furcraea necrotic streak virus (FNSV) by Olpidium virulentus

AbstractFurcraea necrotic streak virus (FNSV) is the causative agent of necrotic streak disease, also known as macana in fique crops (Furcraea spp.) resulting in damage to leaf fibres and economic losses. The rhizospheric fungus Olpidium spp. is present in the roots of affected plants and may play a role in the disease transmission. FNSV infection and the role of fungi were examined in macanavirus‐diseased plants in Colombia. Spherical, and icosahedral (24.7 ± 1.98 nm), non‐enveloped virions with a granular surface were isolated from field fique plants showing signs of macana disease, and the viral genome was completely sequenced. Taxonomic status was assigned through sequence analysis (Macanavirus genus in Tombusviridae family). The variability of the virus pangenome was evaluated in diseased fique plants from ecologically different Andean regions that showed low gene flow. Olpidium virulentus zoospores, identified by internal transcribed spacer (ITS) sequencing and microscopic analysis, were associated with viral particles and resting spores in diseased fique roots. An in vitro virion–zoospore binding assay showed that FNSV and O. virulentus zoospores interacted. Transmission assays in lettuce (Lactuca sativa), a model plant used to study this virus, showed 100% infection when a preincubated mixture of zoospores and FNSV was added to roots, whereas only 33% infection occurred when FNSV was added alone. This demonstrated the ability of O. virulentus to act as a vector for FNSV, potentially enhancing viral transmissibility in field fique crops. This is the first report of FNSV being transmitted by O. virulentus, a rhizosphere fungus.

Strength analysis of hybrid date-wood-Al2O3 polymer composite using Taguchi method

The current study discusses the creation and characterization of a novel set of studies carried out by supplementing the matrix (Polyester resin) with natural materials (date leaf, teak wood dust) and nanoparticles (aluminium oxide). Natural fibres are utilised in the hand lay-up process to manufacture composite materials. The Taguchi approach is utilised in the investigation of different composite reinforcement formulations. The Taguchi design and experimental data analysis are used to investigate the influence of factors such as filler content % and different fillers such as date leaf fiber, teak wood powder, and Al2O3 Nano particles (N). Different composite qualities are developed and studied. Mechanical characteristics, such as tensile and flexural testing, will be performed to evaluate the behaviour of different composites. It was reported that Date leaf fiber was the most influential parameter for increasing the strength of the composite.

Characterizing Senna Alata Fiber and Echinochloa Frumentacea Leaf Fiber: A Novel Approach for Composite Applications

The characterization of natural fibres is used in the domain of materials science and engineering with the objective of generating new environmentally acceptable bio-composites. The purpose of this study is to create and characterize a bio-composite reinforced with Senna Alata fibre and Echinochloa frumentacea fiber. This study analyzes the mechanical, thermal, and morphological characteristics of the fibre. The physicochemical research indicated that the fibre has an excellent average density of 1270 kg/m3. In fact, Senna Alata Fiber (SAF) tensile strength ranges from 2300 to 5479 MPa and Echinochloa frumentacea leaf fiber -EFLFs tensile strength ranges from 204.32 14.25 MPa. As a result, the current study suggests that SAF and EFLF can be used as reinforcing materials with maximum specific characteristics as well as minimal environmental impact in the manufacturing of bio- composite.

Effect of Alkali Treatment and Fibre Composition on the Performance of Pineapple Leaf Fiber-Polyvinyl Alcohol Composites

This paper studied the properties of composites based on polyvinyl alcohol reinforced with pineapple leaf fibres (PALF/PVA). The surface of pineapple leaf fibres (PALF) has been previously treated with 6% sodium hydroxide solution. The influence of fibre loading and fibre surface treatment were examined. Analysis by Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD) displayed physico-chemical changes on treated PALF/PVA composites compared to untreated PALF/PVA composites. The results from thermogravimetric analysis (TGA) showed that the introduction of untreated PALF into the composites enhanced the thermal stability of the composites. Progressive improvement of thermal stability was discovered by associating treated PALF with the composites. The treated PALF composites produced also improved mechanical properties with increasing fibre content. Differential scanning calorimetric (DSC) analyses showed no significant changes in melting temperatures upon incorporating untreated PALF into the PALF/PVA composites. The best improvement in tensile strength value was obtained for treated PALF composite having 3 wt% of fibre loading, with enhancements of about 11% and 54%, compared to untreated PALF composites and plain PVA matrix, respectively.

Adsorption kinetic and thermodynamic studies of the dyeing process of pineapple leaf fibre with berberine dye and modeling of associated interactions

There are on-going investigations on the utilization of pineapple leaf fibre (PALF) as a cheap, safe, and eco-friendly natural fibre. The present work aimed to improve PALF preparation using ultrasonication, investigate the adsorption kinetic and thermodynamic aspects of PALF dyed with berberine dye, and to assess their associated molecular interactions. It was found that concomitant PALF exposure to NaOH solution (5% w/v) plus ultrasonication for 20 min successfully removed non-cellulosic substances from the fibre surface in a very much shorter time compared with the traditional non-ultrasound assisted method (24 h). An adsorption isotherm study of dyeing, the treated fibre with the natural yellow dye berberine revealed a strong adsorption dependence on the pH of the berberine solution with optimal uptake occurring at pH 9–10. A deeper assessment of the mode of dye binding was undertaken by DFT − based calculations on a model cellulose unit and berberine. It revealed that the interaction between berberine and cellulose (PALF) at pH 9.00 was likely to be substantially stronger than at lower pH. From the adsorption kinetic results, a higher affinity and more dye uptake were observed before equilibrium was reached. The adsorption isotherm data could be represented by the Langmuir isotherm (R 2 > 0.99). The enthalpy change (ΔH°) and entropy change (ΔS°) values of dyeing were found to be −17.0 kJ mol−1 and −19.4 J mol−1 K−1 respectively, which pointed to the dye adsorption being an exothermic process. The negative standard affinity (Δµ o) values at the different temperatures of 30, 60, and 80 °C were −11.2, −10.6, and −10.2 kJ mol−1, respectively. It affirmed the dye adsorption process as a spontaneous one. Higher temperatures resulted in a lower affinity and reduced dye uptake compatible with the process being exothermic. Berberine is a potentially useful natural dye for PALF without the need for additives.

Effects of alkaline treatment on the properties of pineapple (Ananas Comosus) leaf fiber (Palf) reinforced with tapioca-based bio resin (Cassava Starch)

The poor compatibility of natural fibers with hydrophobic matrices due to their hydrophilic nature has led researchers to improve their properties to enable better compatibility. Pineapple leaf fiber is one of the abundantly available natural fibers obtained from pineapple leaf. It has good chemical properties and strong admirable mechanical properties and can be used as a replacement for synthetic fibers despite the same deficiencies as other natural fibers. In this study, Pineapple leaf fiber was treated with Alkali at varying concentrations, temperatures, and times. Treated pineapple leaf fiber was reinforced with tapioca-based bio resin (cassava starch). This fiber was subjected to tensile testing and Fourier transform infrared (FTIR) spectroscopy. The results of FTIR indicated the various peaks in the absorbance versus wave number relation. The FTIR analysis of untreated pineapple leaf fiber indicated the presence of O-H stretch, N-H stretch, C ≡ stretch, C=O stretch, and H-C-H bond. The modification of fibers achieved by disruption of hydrogen bonding in the network structure was possible due to its treatment with alkali. Mechanical testing (tensile test) and FTIR were also used to know the effects of chemical treatment on the fibers. Alkali treatment improved the fiber properties as the concentration, temperature, and treatment time increased.

Synergistic Toughening of Epoxy Composite with Cellulose Nanofiber and Continuous Pineapple Leaf Fiber as Sustainable Reinforcements.

In this work, the effect of cellulose nanofiber (CNF) on the mechanical properties of long pineapple leaf fiber (PALF)-reinforced epoxy composites was investigated. The content of PALF was fixed at 20 wt.% and the CNF content was varied at 1, 3, and 5 wt.% of the epoxy matrix. The composites were prepared by hand lay-up method. Comparison was conducted between CNF-, PALF- and CNF-PALF-reinforced composites. It was found that the introduction of these small amounts of CNF into epoxy resin caused very small effects on flexural modulus and strength of neat epoxy. However, impact strength of epoxy with 1 wt.% CNF increased to about 115% that of neat epoxy, and, as the content of CNF increased to 3 and 5 wt.%, the impact strength decreased to that of neat epoxy. Observation of the fractured surface under electron microscope revealed the change in failure mechanism from a smooth surface to a much rougher surface. For epoxy containing 20 wt.% PALF, both flexural modulus and strength increased significantly to about 300% and 240% that of neat epoxy. The composite impact strength increased to about 700% that of the neat epoxy. For hybrid systems containing both CNF and PALF, there were few changes observed in both flexural modulus and strength compared to the PALF epoxy system. However, much improvement in impact strength was obtained. By using epoxy containing 1 wt.% CNF as the matrix, the impact strength increased to about 220% that of 20 wt.% PALF epoxy or 1520% that of neat epoxy. It thus could be deduced that the spectacular improvement in impact strength was due to the synergistic effect of CNF and PALF. The failure mechanism leading to the improvement in impact strength will be discussed.

PARTICLE BOARD HEAT INSULATION PINEAPPLE LEAF FIBER WASTE AND HVS PAPER AS AN ALTERNATIVE TO IMPROVE INDOOR ENVIRONMENTAL QUALITY

The limited supply of wood as a raw material in various industries requires a better alternative material. Wasted-based composite engineering can be a solution to this problem. What's more, composite can be engineered according to needs, such as having the ability to reduce heat to maintain comfortable room temperature conditions. Therefore, in this research, a particle board reinforced by pineapple leaf fiber waste and HVS paper waste was developed to know the effect of the particle board reinforcement composition on reducing heat. In this research, a comparison of pineapple leaf fiber waste and HVS paper waste was used at 100%:0%; 70%:30%; 50%:50%; 30%:70%; and 0%:100% with resin adhesive. This particle board is made by mixing all the ingredients and then printing it into a mold and then carrying out the drying process. The test was carried out based on a temperature difference analysis. The most optimum particle board reinforcement composition to reduce heat is 100% pineapple leaf fiber waste : 0% HVS paper waste.

Effect of Pineapple Leaf Fiber on the Physico-mechanical Properties of Gypsum Board

Gypsum is a common interior construction material, especially when used as a finishing element. However, interest in prospective uses of gypsum as a finishing component has diminished in recent years as a result of its weak mechanical strength and brittle character, which is essential in interior construction. Therefore, to overcome this challenge, the effect of pineapple leaf fiber on gypsum was investigated. Five different composite configurations of 2%, 3%, 5%, 10%, and 20% pineapple leaf fibre (PALF) with two PALF sizes of 5 mm and 15 mm were prepared and tested after 7 and 28 days of curing. The results of the tests show that materials reinforced with 2% PALF have significantly improved mechanical properties. The compressive strength of a gypsum composite increased by 12.4% when 2% PALF was added. Flexural strength increased by 59% when 2% PALF was added to the mixture. The study provided a means of making gypsum composites having greater mechanical strength than those made from fossil oil-based polymers. It also found relevant use of pineapple leaf, an agricultural waste.

Effect of Fiber Morphology and Elemental Composition of Ananas comosus Leaf on Cellulose Content and Permittivity

The fiber morphology and elemental composition of pineapple leaf fibers were analyzed to understand their effect on the cellulose content and permittivity value. Cellulose fiber was extracted from pineapple leaf via the alkaline treatment method, and the content was determined using the Kurschner-Hanack method. The permittivity value of the developed cellulose fiber was measured based on the waveguide technique in the G-band. The surface morphology of the developed fiber was examined with scanning electron microscopy. Meanwhile, energy dispersive X-ray (EDX) spectroscopy was used to identify the elemental composition of the pineapple leaf fibers. The findings were that the cellulose fibers with the least diameter and distance between fibers exhibited the highest permittivity value, which was 1.85. The EDX analysis demonstrated that carbon was the commonest elemental in all fibers, and was 55 wt.% of the total element composition. Furthermore, the results showed that the permittivity value increased as the carbon composition increased, and decreased as the oxygen composition increased. Hence, the morphological and elemental studies of the cellulose fiber are useful in determining the permittivity value of the cellulose fiber for material development. The high permittivity value of the pineapple leaf fibers is believed to have great potential for use in electronic components.

Discarded water hyacinth/pineapple fibers and carbon/innegra fabrics and TiC nanoparticles reinforced UV resistant polyester composites

The widespread utilization of plant cellulose fiber-inorganic fillers-synthetic fabric-reinforced laminates is the current trend in the research field. This investigation studies the effect of chemically treated and untreated water hyacinth/pineapple leaf, titanium carbide nanoparticles, Innegra, and carbon fabric reinforcement on the physical, mechanical, and thermal characteristics of ultra-violet resistant polyester hybrid composites. The chemically treated and untreated water hyacinth/pineapple leaf fibers were examined from Fourier transform infrared (FTIR) spectra, X-ray diffraction (XRD), differential scanning calorimeter (DSC), thermogravimetric analysis (TGA), scanning electron microscope (SEM) and found that chemically treated fibers have an excellent interlocking bond with TiC nanoparticles, Innegra, carbon fabric, and polyester matrix. The maximum tensile, flexural, interlaminar shear, impact strength, and shore hardness also affirmed good interfacial bonding of fillers and textiles within the matrix as examined from SEM micrographs. The present investigation also determines the forecasting of the approaches and performance of artificial neural network (ANN) to model the material characteristics of fabricated polyester hybrid composite. Furthermore, the ANN model was more accurate and a valuable technique to optimize the material characteristics of the developed polyester hybrid composite.

The effect of fiber stacking sequence on mechanical and morphological behavior of paddy straw/pineapple leaf fiber-reinforced ortho-laminated polyester hybrid composites

The contemporary agricultural natural fiber is effectively used for fabricating composites because of its economical, ample availability, and biodegradability. In this way, the potential material for the reinforcement of hybrid (paddy straw and pineapple leaf) fiber- and ortho-laminated polyester composites was conducted. This research article is focused on the hybridization of untreated, treated, and paddy pulp fiber-reinforced polyester composite laminates. The unidirectional paddy straw fiber and pineapple leaf fiber (PALF) were used in the fabrication process of laminate using a compression molding machine with the mold dimensions of 300 × 300 × 5 mm is used and the investigation of mechanical (tensile, flexural, impact, hardness, shear) behaviors are conducted in the samples as per the standard. Five samples were prepared by varying the fiber content in the matrix in which sample S1 pure polyester plate without any addition of reinforcement. Out of these five samples, sample 4 (S4) produced better tensile, flexural, impact, hardness, and shear values of 28 MPa, 61 MPa, 3.46 Joules, 64 HR L, and 68.7 MPa, respectively. Comparing the laminate samples of S1 and S4 there is a 35.2% increase in the tensile value of S4, similarly, other values also resulted in better hikes. In addition to that, the water absorption properties of the laminate were also evaluated and fiber breakage, fiber pullout, fiber orientation, crack propagation, and voids on the fractured specimens were identified with help of a scanning electron microscope (SEM). Overall, the fabricated hybrid composite laminates were lightweight and has good fiber-matrix bonding with improved mechanical and morphological properties for commercial and home need applications.

Radiation effects on Brillouin-based Sensors: Feasibility of temperature and strain discrimination using LEAF Single-Mode optical fiber

In this paper, we investigate the accessible performances in terms of strain and temperature discrimination using Brillouin Optical Time Domain Analysis (BOTDA) combined with the LEAF fiber (from Corning) when exposed to γ-rays up to doses of 1MGy(SiO2). This optical fiber offers a multipeak Brillouin Gain Spectrum (BGS) with unique dependencies of each of its peaks over temperature and strain. The discrimination capability evolution of LEAF is investigated at high γ doses and dose rates to evaluate the radiation effects on the sensing performances. Gamma irradiation leads to modifications of the LEAF BGS signature through two main effects. First, the Radiation Induced Attenuation (RIA) of this germanosilicate optical fiber limits the BGS amplitude, sensing range and capability for discrimination over BGS amplitude. Second, radiations modify the Brillouin scattering properties by slightly changing the refractive indices and the acoustic velocities of the fiber core and cladding leading to a small change in temperature and strain dependences as well as a limited Radiation Induced Brillouin Frequency Shift (RI-BFS) causing a direct error on the measured parameters. Results exhibit an overall decrease of temperature and strain uncertainties through discrimination process after 1MGy irradiation reaching 0.9°C and 29με for 0.1 MHz frequency uncertainty.

Characterization of pineapple leaf fiber, areca fiber and egg shell powder reinforced phenolic resin composites and finding optimal parameters for sustainable machining

In the aim of the present investigation is to fabricate pineapple leaf and areca fiber and egg shell powder reinforced phenolic resin composites through hand layup technique and study their mechanical properties such as tensile, compression, flexural, impact and hardness properties. The mechanical properties finding revealed that 70:30 ratio reinforced composite showed efficient properties among all the combinations of fibers. So machining study has been carried out on this composite with three process variables such as spindle speed, feed rate and pecking and analyzed the effect of drilling duration through Taguchi’s technique. The finding revealed that a spindle speed of 1000 rpm, feed rate of 0.15 mm/min and pecking of 4.5 mm is the optimal machining process parameter for getting minimum drilling duration. Moreover, Analysis of Variance (ANOVA) confirmed that, spindle speed is the process parameter having a significant effect on the drilling duration.

The mechanical properties of pineapple leaf fibre (PALF)/carbon hybrid laminate composites at anti-symmetric ply orientation

The mechanical properties of antisymmetric pineapple leaf fibre (PALF)/carbon hybrid laminate composites have been studied by researchers. The laminates were produced by vacuum infusion, and the void content easement was applied during validation. The laminates were tested on tensile (ASTM D3039) and flexural (ASTM D7264) testing. Analysing the results of tensile testing, it was determined that the laminate composed of PALF as the first layer and carbon as the second layer has the maximum tensile properties, at strength 110 MPa and modulus 6.5 GPa, respectively. After examining the flexural data, it was determined that the laminate made up of the first carbon and second PALF layers had the highest flexural strength and modulus, 235 MPa and 4.6 GPa respectively. Hence, the results imply that the stacking order influences the tensile and flexural properties. As concluded, stacking sequence has significant effect on anti-symmetric laminates.

Effects of fiber surface modification on mechanical properties of short pineapple leaf fiber-carbon black reinforced natural rubber hybrid composites

At present, the world is focusing on the circular economy by turning waste into production resources again, reducing waste generation, and making it circulate in the system. This research focuses on using agricultural waste, which is pineapple leaves abundant in Thailand, to be processed into pineapple leaf fibers (PALF) and used to reinforce natural rubber. PALF has relatively high strength when compared to other natural fibers. On the other hand, the challenge of using PALF to reinforce natural rubber is the difference in the polarity of the fibers and rubber matrix. Thus, surface modification of PALF was studied to enhance the adhesion between the fiber surface and the matrix. Four systems were compared, i.e., untreated PALF, alkaline-treated, silane69-treated, and aminosilane-treated PALF. A unidirectional fiber-reinforced natural rubber composites were prepared with fixed fiber and carbon black contents of 10 and 30 phr, respectively. Mechanical properties of the composites were determined by tensile test and morphology was observed by scanning electron microscope (SEM). It was found that silane69-treated and aminosilane-treated PALF could reinforce the rubber matrix over the entire strain. However, silane69-treated and aminosilane-treated PALF had lesser reinforcement effect than alkaline-treated PALF at low strains. Despite a clear change in mechanical behavior, SEM could not tell the difference or changes that occur at the interface. Fiber surface modifications with silane69 and aminosilane have the potential to be further developed to improve properties of natural rubber composites and will, hopefully, increase the value of rubber products for Thailand industry.

Morphological, characterization and FTIR analysis of delignified pineapple leaves as raw material for cellulose production

Lignocellulose is an abundant natural polysaccharide component containing cellulose, hemicellulose and lignin. Pineapple leaves contain high levels of cellulose and their utilization as abundant plantation waste is still not optimal. The delignification process was carried out to isolate cellulose and remove lignin contained in pineapple leaf fibers. This study aims to obtain high purity cellulose and analyze the effect of delignification on morphology and FT-IR results. In this study, the pineapple leaf fiber used underwent a delignification process by adding a Deep Euteutic Solvent (DES) solvent consisting of a mixture of Choline chloride (ChCl): formic acid (1:2). The cellulose obtained was characterized by morphology and analyzed using FT-IR. FTIR pineapple leaf fiber with delignification treatment still contained lignin in the absorption area around 1600cm−1 with C=C aromatic group as shown from the peak on the FTIR graph, fiber and it was clarified in the morphology of pineapple leaves which showed that the fiber surface was smoother and looked less lignin. In this study it can be concluded that the delignification process that has been carried out can remove lignin from the material.

Performance and Mechanical Characterization of Tufted and Untufted Woven Pine Apple Leaf Fibre Reinforced with Poly Lactic Acid Green Composites

This study examines the impact of through-the-thickness tufted natural Woven Pineapple leaf fibres on the tensile and flexural characteristics of sandwich structures. The tufting process seeks to improve the performance of a sandwich structure by ignoring the delamination between the skin and core. Strengthen sandwich structure interlaminations and make them more resistant to damage. This project focuses on creating and implementing an efficient through-the-thickness reinforcing technique based on hand tufting reinforcement. Totally seven specimens were fabricated six tufted and one untufted specimen. Samples that were tufted had three distinct tufting distances (10, 20, and 30 mm, respectively) and two different angle orientations (450,900). An empirical study was developed that comprised tensile and flexural testing of the tufted and untufted sandwich panels formulate of natural pineapple leaf fiber reinforced with Polylactic acid in order to evaluate the impact of tufting on sandwich structure. The outcome displays the fabrication-specific mechanical characteristics of composite laminates. In the tensile mechanical test, the strength of the tufted specimen (450,900) increased by 17% and 34%, respectively, in comparison to the untufted specimen. According to the results of the flexural test, the highest flexural strength for a tufted specimen is between 35% and 67% when compared to an untufted specimen. This indicates that the tufting was successful in enhancing both the in-plane and out-of-plane mechanical properties of composites. Finally, the fracture surface of the tested specimens is examined using scanning electron microscopy (SEM).

Investigating the synergistic effect of olive trunk leaves powder and pineapple leaf fibers on the physical, tensile, and thermal properties of epoxy‐based composites

AbstractThe study evaluated the effect of adding different proportions (3/7, 1/1, and 7/3) of pineapple leaf fiber to composites reinforced with olive trunk leaves powder by measuring tensile properties, moisture absorption, and thermal stability. The results showed that the proportion of pineapple leaf fiber in the hybrid composites strongly influenced tensile properties, moisture absorption, and thermal stability. Increasing pineapple leaf fiber loading from 12 wt% to 28 wt% resulted in an important increase in tensile strength, namely an average of 46%. However, the tensile strength and Young's modulus of the hybrid composites were inferior to those of the parent composites, which could be attributed to the relative inability of the hybrid composites to withstand tensile loads. Thermo‐gravimetric analysis results showed that the introduction of even the lowest amount of pineapple leaf fibers in the olive trunk leaves improved the thermal stability of the composites, bringing the degradation onset above 240°C, therefore suggesting the possibility of a future processing with most thermoplastic matrices. The differences in thermal stability between epoxy composites with 7/3 olive trunk leaves powder/pineapple leaf fiber, 1/1 olive trunk leaves powder/pineapple leaf fiber, and 3/7 olive trunk leaves powder/pineapple leaf fiber were very limited. Regarding moisture absorption, the presence of olive trunk leaves powder considerably reduced the weight gain, and also passing from 1/1 to 7/3 olive trunk leaves/pineapple leaf fibers offered a distinct advantage, measurable as more than 1% reduction in water saturation content.