Vegetable fibers as multifunctional materials

Amico, Sandro Campos

doi:10.1590/s1517-70762010000200037

Cited by 7 publications

(6 citation statements)

References 31 publications

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“…These different treatments change the hydrophilic character of the vegetable fibers so that moisture effects are reduced in the composite 6 . Current works are now focusing on hybridization as a way of undoubtfully reaching noteworthy mechanical properties for composites based on vegetable fibers 7 . The incorporation of different types of reinforcements into a single matrix has led to the development of hybrid composites.…”

Section: Introductionmentioning

confidence: 99%

Effect of reinforcement nanoparticles addition on mechanical properties of SBS/curauá fiber composites

Borba¹,

Tedesco²,

Lenz

2013

Mat. Res.

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Composites of styrene-butadiene-styrene triblock copolymer (SBS) matrix with curauá fiber and/ or a nanoparticulate mineral (montmorillonite clay -MMT) used as reinforcing agents were prepared by melt-mixing. The influence of clay addition on properties like tensile and tear strength, rebound resilience, flex fatigue life, abrasion loss, hardness and water absorption of composites with 5, 10 and 20 wt% of curauá fiber was evaluated in presence of maleic anhydride grafted styrene-(ethyleneco-butylene)-styrene triblock copolymer (MA-g-SEBS) coupling agent. Furthermore, the effect of mineral plasticizer loading on tensile strength of selected composites was investigated. The hybrid SBS composite that showed the best overall mechanical performance was composed by 2 wt% of MMT and 5 wt% of curauá fiber. Increasing fiber content up to 20 wt% resulted in a general decrease in all mechanical properties as well as incorporation of 5 wt% MMT caused a decrease in the tensile strength in all fiber contents. The hybrid composites showed clay agglomerates (tactoids) poorly dispersed that could explain the poor mechanical performance of composites at higher concentrations of curauá fiber and MMT nanoparticles. The addition of plasticizer further decreased the tensile strength while the addition of MMT nanoparticles decreased water absorption for all SBS composites.

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Section: Introductionmentioning

confidence: 99%

Effect of reinforcement nanoparticles addition on mechanical properties of SBS/curauá fiber composites

Borba¹,

Tedesco²,

Lenz

2013

Mat. Res.

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“…Although these treatments usually increase adhesion, they can be costly, preventing their widespread use, and they may also diversely affect the mechanical properties of the fibers, reducing fiber strength [5,6,9], which will ultimately be detrimental to the composite produced with these fibers. As an example, in the work of the Mishra et al [10], the polyester composite reinforced with sisal fibers treated with 5% NaOH showed higher tensile strength than that containing sisal fibers treated with 10% NaOH.…”

Section: Introductionmentioning

confidence: 99%

Sodium Borohydride as a Protective Agent for the Alkaline Treatment of Sisal Fibers for Polymer Composites

Moraes

Sierakowski

Abreu

et al. 2011

Composite Interfaces

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The vegetable fibers used for polymer matrix composites are usually treated to improve their adhesion with the matrix. The chemical treatment with sodium hydroxide (NaOH), although widely used, may damage the fiber surface structure, reducing its strength. The possibility of protecting vegetable fibers against alkaline chemical aggression by using hydride ions (H − ) was investigated in this work. Sisal fibers were modified by immersion in a NaOH aqueous solution (2, 5 and 10% wt/vol), with or without the addition of sodium borohydride (NaBH 4 ) (1% wt/vol), under variable conditions (immersion time and temperature). The effect of using NaBH 4 was investigated using fiber tensile and pull-out tests, critical length calculation, along with a Weibull statistical analysis. This agent was found to minimize sisal degradation under highly concentrated alkaline conditions in comparison with sisal treated with the pure NaOH solution. The results suggest the 5% wt/vol treatment for 60 min under room temperature in the presence of the hydride ions as the most suitable for sisal. This result may be extended to other vegetable fibers of similar composition and may promote their use in polymer composites.

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“…Other suggestions for usage are: casting handicraft and decorative objects as panels, stained glass, table tops, jewelry, statues, trophies, casting parts for toilets and toilet seats, soap dishes, trash cans, sinks and towel racks. Along with glass fiber, it can be used in composing construction tiles (manual process), domes and shutters (Poliresinas 2012;Amico 2010).…”

Section: Composites Production and Analysismentioning

confidence: 99%

Thermoset composites reinforced with recycled cotton textile residues

et al. 2015

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The recycling of textiles is an issue that requires immediate attention in order to address the management of textiles derived from household waste, as well as scraps generated throughout manufacturing textile processes. The present study aimed to produce composites employing three different types of thermoset resins (epoxy, polyester orthophthalic and polyurethane) reinforced with recycled cotton textile residues on which tensile tests were carried out. The incorporation of 30% (v/v) of textile reinforcement in composites made from the specific epoxy resin employed in the present study showed an increase of approximately 2-fold relative to pure resin tenacity and Young's modulus (respectively from 0.09 to 0.16 MPa and from 0.5 to 1.2 MPa). For composites made of orthophthalic polyester resin, an increase was observed of 2-fold relative to pure resin tenacity and 3-fold relative to Young's modulus (respectively from 6.5 to 13.8 MPa and from 193 to 772 MPa). No significant alterations were observed for these parameters in polyurethane resin composites (16 MPa for tenacity and near 700 MPa for Young's modulus) probably because the modulus value supplied by the fraction of cotton fiber is not as significant as that one from the pure polyurethane resin. Two propositions of fashion accessories were made by employing these composite materials. Also, the artworks of renowned Brazilian designers, namely, Campana Brothers and R. Sobral, were analyzed to develop the artwork of such accessories for the present "documentation process". Thus in the present study aesthetic and technical aspects are analyzed together covering all production phases of material, processes, creation and design of final product.

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Vegetable fibers as multifunctional materials

Cited by 7 publications

References 31 publications

Effect of reinforcement nanoparticles addition on mechanical properties of SBS/curauá fiber composites

Effect of reinforcement nanoparticles addition on mechanical properties of SBS/curauá fiber composites

Sodium Borohydride as a Protective Agent for the Alkaline Treatment of Sisal Fibers for Polymer Composites

Thermoset composites reinforced with recycled cotton textile residues

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