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Introduction<\/h3>\n\n\n\n
Composites are advanced materials that consist of two or more distinct phases, combining their unique properties to yield a superior material with enhanced performance. These materials typically comprise a matrix, which is usually made from polymers, metals, or ceramics that binds reinforcing phases such as fibers, particles, or flakes. The resulting composite material benefits from the synergistic properties of its constituents, including improved mechanical, thermal, and chemical performance1<\/a><\/sup>. Composites are well-regarded for their high strength-to-weight ratio, durability, and ability to withstand extreme conditions, making them essential in industries such as aerospace, automotive, construction, and sports2<\/a><\/sup>.<\/p>\n\n\n\n In recent years, there has been a growing shift towards the development of eco-friendly composites in response to escalating environmental concerns and the need to minimize reliance on non-renewable resources. This shift has fostered the rise of natural fiber composites (NFCs), which provide sustainable alternatives by leveraging biodegradable and renewable resources. NFCs offer several environmental advantages, including biodegradability, reduced carbon footprints, and the utilization of renewable materials, in contrast to synthetic fiber composites3<\/a><\/sup>. Among the many natural fibers being explored, pineapple leaf fiber (PALF) has gained significant attention due to its unique properties and its potential applications in biocomposite development4<\/a><\/sup>.<\/p>\n\n\n\n PALF is a low-cost, abundant, and renewable source of fiber, typically a by-product of pineapple cultivation, making it an attractive material for composite production. This fiber boasts high cellulose content, which imparts rigidity and tensile strength, as well as a low microfibrillar angle that enhances its strength and flexibility5<\/a><\/sup>. Furthermore, PALF composites are lightweight, which is particularly advantageous for applications in sectors such as automotive and aerospace, where weight reduction is crucial6<\/a><\/sup>. The combination of these properties makes PALF an ideal candidate for use in biocomposites, offering a viable alternative to synthetic fibers like glass and carbon fibers.<\/p>\n\n\n\n Despite the promising mechanical properties of PALF-reinforced biocomposites, challenges remain in fully utilizing these materials. One of the primary issues is the hydrophilic nature of natural fibers, which leads to moisture absorption and subsequent degradation of mechanical properties over time. Additionally, achieving optimal fiber-matrix adhesion can be difficult due to the inherent incompatibility between the hydrophilic fibers and the polymer matrices7<\/a><\/sup>. Surface treatments and coupling agents are often employed to enhance fiber-matrix compatibility, but these treatments may introduce additional complexities in the processing of the composites. Moreover, variations in PALF quality due to differences in cultivation and extraction methods can result in inconsistent mechanical properties of the final composite material8<\/a><\/sup>.<\/p>\n\n\n\n To overcome these challenges, research efforts are focused on developing hybrid composites and advanced surface modification techniques to improve the mechanical properties and durability of PALF composites. These strategies aim to expand the applications of PALF biocomposites in sectors such as automotive, construction, and packaging, where environmentally friendly, lightweight, and durable materials are in high demand9<\/a><\/sup>. Moreover, the development of bio-based resins and the integration of PALF with other natural fibers are being explored to further improve the sustainability and performance of these biocomposites10<\/a>,11<\/a><\/sup>. Additionally, studies have shown that PALF composites can be used in a variety of consumer goods, including furniture, packaging, and textiles, further highlighting their versatility and potential in everyday applications12<\/a>,13<\/a><\/sup>. The automotive industry has also started incorporating PALF composites for non-load-bearing components, such as dashboards and seat backs, contributing to weight reduction and improved fuel efficiency in vehicles14<\/a><\/sup>. Furthermore, ongoing research into novel processing techniques, such as injection molding and compression molding, aims to optimize the performance and scalability of PALF-reinforced biocomposites for industrial-scale applications15<\/a><\/sup>.<\/p>\n\n\n\n This paper provides a comprehensive investigation into the mechanical properties of pineapple leaf fiber-reinforced biocomposites. The study examines the effects of fiber content, fiber orientation, and processing variables on the composite\u2019s performance. Furthermore, it addresses the challenges associated with using PALF in biocomposites and highlights potential solutions, contributing to the advancement of sustainable biocomposite materials. This research, which focuses on PALF-reinforced composites, aims to promote the adoption of eco-friendly materials in various industrial applications.<\/p>\n\n\n\n Pineapples, perennial herbaceous plants with heights and widths of 1\u20132 m, are bromeliaceous. This plant is grown in coastal and tropical areas for its fruit. Pineapple production in India is rising on 2,250,000 acres. These fields support the short-stemmed, dark-green pineapple plant. The leaf emerges ornamentally and then becomes a sword-shaped structure three feet long and two to three inches wide. Spiral-shaped fibrous leaves. For stiffness, leaf edges are twisted inward. The production of pineapple leaf fiber (PALF)-reinforced biocomposites involves a systematic process (see Fig. 1<\/a>) that begins with the extraction of fibers from pineapple leaves and culminates in their incorporation into a matrix material. The initial step in this process is the harvesting of mature pineapple leaves, which are typically considered agricultural waste following fruit production. Once harvested, the leaves undergo a retting process, wherein they are soaked in water or buried in the ground for a set period to facilitate the separation of the fibers from the leaf matrix. After retting, the fibers are manually or mechanically extracted from the leaves. The recovered fibers are then thoroughly washed and dried to remove any contaminants and excess moisture.<\/p>\n\n\n\n To enhance the adhesion between the pineapple fibers and the matrix material, the fibers may undergo optional surface treatments, such as chemical treatments or coatings. This step is crucial in improving the interfacial bonding between the fibers and the polymer resin. Following fiber preparation, the next phase involves the selection and preparation of the matrix material. Depending on the desired properties of the composite, a polymer resin is chosen and mixed with appropriate additives, fillers, or reinforcing agents to achieve the required composition. The composite fabrication process continues with the hand lay-up method, where the fibers are carefully arranged in a mold, ensuring uniform distribution, and then impregnated with the matrix material. This is followed by the compression molding process, in which the fiber-matrix assembly is placed into a mold and subjected to heat and pressure to form and cure the composite. Alternatively, the vacuum infusion method may be used, where the fibers are placed in the mold, and the matrix material is infused under vacuum pressure to ensure complete impregnation. This method is often employed for generating cylindrical composite structures by wrapping continuous fibers around a rotating mandrel and applying the matrix material precisely.<\/p>\n\n\n\n Once the composite has been shaped, the curing process solidifies the matrix material and firmly bonds the fibers. This curing can occur under heat and pressure or ambient conditions, depending on the resin system used. Post-processing steps, such as trimming and finishing, are then carried out to achieve the desired shape and appearance of the composite. Surface treatments may also be applied to enhance both the aesthetic and performance characteristics of the final product.<\/p>\n\n\n\n <\/p>\n\n\n\n … you may read the complete article under https:\/\/www.nature.com\/articles\/s41598-025-12044-0<\/a><\/p>\n\n\n\nMaterials and methods<\/h3>\n\n\n\n
Pineapple fibre creation<\/h3>\n\n\n\n