Thermal and mechanical characteristics of polyurethane/curaua fiber composites

Mothé, Cheila G.; Araujo, Carla R. de; Wang, Shui H.

doi:10.1007/s10973-008-9091-2

Cited by 25 publications

(12 citation statements)

References 21 publications

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“…157,163 Thermoset and thermoplastic composites reinforced with curaua fibers were prepared and the properties of the composites are discussed by several authors. [164][165][166][167][168][169][170][171] Curaua fiber production for industrial applications with respect to characterization and micro-propagation was discussed by Leao et al 172 Figure 9 shows the SEM image of the fiber with leaf residue adhered to surface. Curaua fibers were reinforced in recycled polypropylene and polystyrene and good composite properties were observed.…”

Section: Curaua Curaua (Ananas Erectifolius)mentioning

confidence: 99%

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

2015

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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 plant and animal fibers are not discussed in detail. This review paper discusses all the six types of plant fibers such as bast, leaf, seed, straw, grass, and wood, together with animal fibers and regenerated cellulose fibers. Additionally, the review considers developments dealing with natural fibers and their composites. The fiber source, extraction, availability, type, composition, and mechanical properties are discussed. The advantages and disadvantages of using each biofiber are discussed. Three fabric architectures such as nonwoven, woven and knitted have been briefly discussed. Finally, the paper presents the overview of the results from the composites made from each fiber with suitable references for in-depth studies.

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Section: Curaua Curaua (Ananas Erectifolius)mentioning

confidence: 99%

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

2015

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“…[39,40]. It has been proposed that chemical interactions between the fibers and the PUs matrix can potentially occur through bonds between hydroxyl groups of cellulose and carbonyl groups of the PU, and they are responsible for increasing the interfacial adhesion between filler and matrix [35,41]. The shift of the band at approximately 3300 cm suggests the disruption of a significant amount of hydrogen bonds, resulting in a band for "free" N-H stretching [34].…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Thermomechanical Properties of Polyurethanes and Biocomposites Derived from Macauba Oil and Coconut Husk Fibers

et al. 2015

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This work reports on a very effective route to produce bio-based polyurethanes (PUs) and composites with high content of renewable carbon sources. The PUs are prepared with polyols synthesized from macauba oil (Acrocomia aculeata) and methylene diphenyl diisocyanate, at different [NCO]/[OH] molar ratios. Later, biocomposites are prepared with the as-obtained PUs reinforced with coconut husk fibers. The successful synthesis of natural oil-based polyols is ascribed to the hydroxylation and consumption of carbon-carbon double bonds in the fatty acid chains of the original starting oil as attested by FTIR spectroscopy. According to different thermal analysis techniques (TG, DTG, and DTA), the increase in the [NCO]/[OH] molar ratio improves the thermal stability of PUs, likely due to an increase of crosslinks. Dynamic mechanical analysis evidences the reinforcement effect of coconut husk fibers in bio-based PUs. The present PUs and composites are of low-cost and environmentally friendly materials for structural applications.

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“…This fiber has similar costs compared to other vegetable fibers, but its strength is much higher than that of coir, sisal, and jute, and the fiber almost reaches the physical properties of the more expensive flax and even glass fibers. 4,5 Some studies in the litera-ture have reported the mechanical, thermal, and dynamic mechanical properties of curaua composites 6 and also their potential use in the automobile sector. 4 Because fiber-reinforced polymers are subjected to various types of dynamic stress during service, studies of their viscoelastic properties over a wide range of frequencies and temperatures are of great importance.…”

Section: Introductionmentioning

confidence: 99%

Dynamic mechanical properties of curaua composites

Ornaghi

Silva²,

Zattera

et al. 2012

J of Applied Polymer Sci

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In this study, we aimed to evaluate the characteristics of curaua composites using dynamic mechanical analysis. Curaua composites with distinct fiber volume fractions (11–38%) were studied, and their storage and loss moduli were found to increase with reinforcement content. On the other hand, the activation energy of the relaxation process in the glass‐transition region decreased with the curaua content; this conclusion was corroborated by the elastic chain concentration results. The Cole–Cole plots became flattened as the curaua content increased; this was indicative of a more homogeneous system, and the tan δ peak height and peak width at half‐height decreased. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

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Thermal and mechanical characteristics of polyurethane/curaua fiber composites

Cited by 25 publications

References 21 publications

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

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

Synthesis and Thermomechanical Properties of Polyurethanes and Biocomposites Derived from Macauba Oil and Coconut Husk Fibers

Dynamic mechanical properties of curaua composites

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