Biocomposites reinforced with natural fibers: 2000–2010

This paper provides a comprehensive overview on different surface treatments applied to natural fibres for advanced composites applications. In practice, the major drawbacks of using natural fibres are their high degree of moisture absorption and poor dimensional stability. The primary objective of surface treatments on natural fibres is to maximize the bonding strength so as the stress transferability in the composites. The overall mechanical properties of natural fibre reinforced polymer composites are highly dependent on the morphology, aspect ratio, hydrophilic tendency and dimensional stability of the fibres used. The effects of different chemical treatments on cellulosic fibres that are used as reinforcements for thermoset and thermoplastics are studied. The chemical sources for the treatments include alkali, silane, acetylation, benzoylation, acrylation and acrylonitrile grafting, maleated coupling agents, permanganate, peroxide, isocyanate, stearic acid, sodium chlorite, triazine, fatty acid derivate (oleoyl chloride) and fungal. The significance of chemically-treated natural fibres is seen through the improvement of mechanical strength and dimensional stability of resultant composites as compared with a pristine sample.

Chemical treatments on plant-based natural fibre reinforced polymer composites: An overview

Recent advances in vegetable oil-based polymers and their composites

Natural fibers today are a popular choice for applications in composite manufacturing. Based on the sustainability benefits, biofibers such as plant fibers are replacing synthetic fibers in composites. These fibers are used to manufacture several biocomposites. The chemical composition and properties of each of the fibers changes, which demands the detailed comparison of these fibers. The reinforcement potential of natural fibers and their properties have been described in numerous papers. Today, high performance biocomposites are produced from several years of research. Plant fibers, particularly bast and leaf, find applications in automotive industries. While most of the other fibers are explored in lab scales they have not yet found large-scale commercial applications. It is necessary to also consider other fibers such as ones made from seed (coir) and animals (chicken feather) as they are secondary or made from waste products. Few plant fibers such as bast fibers are often reviewed briefly but other p...

A Review of Natural Fibers Used in Biocomposites: Plant, Animal and Regenerated Cellulose Fibers

Mechanical properties of kenaf fibre reinforced polymer composite: A review

Biobased composites were manufactured with a compression-molding technique. Novel thermoset resins from soybean oil were used as a matrix, and flax fibers were used as reinforcements. The air-laid ...

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Biobased composites prepared by compression molding with a novel thermoset resin from soybean oil and a natural‐fiber reinforcement

This review is based on the surface treatment of natural fibres which can be used in technical applications Natural fibres on their own have some draw backs regarding moisture uptake, quality variations, low thermal stability, and poor wettability Insufficient adhesion between polymer matrix and fibre leads in time to debonding Overcoming the weaknesses of these natural fibres gave the motivation for this study where physical and chemical methods of modification were considered Physical methods such as electric discharge and mercerization were reported as well as the chemical methods such as graft copolymerization and treatment with isocyanates, and the results due to these modifications were discussed This study reveals that natural fibres are good candidates for reinforcement but they have to be suitably treated to improve their properties if they are to be used in technical applications The various fibre surface treatments actually improve the interfacial adhesion between the fibre surface and the matrix, thereby giving good mechanical properties to the resulted polymer composites

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Surface Treatments of Natural Fibres—A Review: Part 1

The reviewed work addressed the shift in focus from conventional polymers to bio-based and renewable polymers. The environmental attributes of the renewable polymers make them preferred choice of matrix. The properties of the matrices from renewable origin could compete in high end applications. The composition of the fatty acids in plant seed oil was discussed and the determination of the level of unsaturation used the iodine value. This review also extensively discussed the values of various fatty acid components present in the oils. Areas of application of the thermosetting polymers obtained from plant seed oils were also discussed.

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A Review of Vegetable Oil-Based Polymers: Synthesis and Applications

Biobased thermosets resins were synthesized by functionalizing the triglycerides of epoxidized soybean oil with methacrylic acid, acetyl anhydride, and methacrylic anhydride The obtained resins were characterized with FTIR, 1H-NMR, and 13C-NMR spectroscopy to confirm the functionalization reactions and the extent of epoxy conversion The viscosities of the methacrylated soybean oil resins were also measured for the purpose of being used as a matrix in composite applications The cross-linking capability was estimated by UV and thermally initiated curing experiments, and by DSC analysis regarding the degree of crosslinking The modifications were successful because up to 97% conversion of epoxy group were achieved leaving only 22% of unreacted epoxy groups, which was confirmed by 1H-NMR The 13C-NMR confirms the ratio of acetate to methacrylate methyl group to be 1 : 1 The viscosities of the methacrylated soybean oil (MSO) and methacrylic anhydride modified soybean oil (MMSO) were 02 and 048 Pas, respectively, which indicates that they can be used in resin transfer molding process © 2009 Wiley Periodicals, Inc J Appl Polym Sci, 2010

Synthesis of reactive soybean oils for use as a biobased thermoset resins in structural natural fiber composites

A bio-based thermoset resin was reinforced with flax fabrics and Lyocell fiber. The effect of different weave architectures
was studied with four flax fabrics with different architectures: plain, t ...

/pdf/impact-and-flexural-properties-of-flax-fabrics-and-lyocell-39n8ph98qm.pdf

Kayode Adekunle

Papers

Biobased composites prepared by compression molding with a novel thermoset resin from soybean oil and a natural‐fiber reinforcement

Surface Treatments of Natural Fibres—A Review: Part 1

A Review of Vegetable Oil-Based Polymers: Synthesis and Applications

Synthesis of reactive soybean oils for use as a biobased thermoset resins in structural natural fiber composites

Impact and Flexural Properties of Flax Fabrics and Lyocell Fiber-Reinforced bio-based Thermoset