Effect of fiber content and surface treatment on the mechanical properties of natural fiber composites produced by rotomolding

Cisneros-López, Erick Omar; González‐López, Martín Esteban; Pérez‐Fonseca, Aida Alejandra; González‐Núñez, Rubén; Rodrigue, Denis; Robledo‐Ortíz, Jorge R.

doi:10.1080/09276440.2016.1184556

Cited by 89 publications

(85 citation statements)

References 37 publications

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“…The modulus increase is similar to those reported in the literature for fiber-reinforced rotomolded polymers: 10% for single layer materials [16,36], 18% for bilayer materials and 37% for three-layer materials [18]. These expected improvements are related to the presence of a rigid phase (AF) in the matrix [10]. This increase was still present even with 0.15% and 0.25 wt % ACA was used: 21% and 6% of increase, respectively with 15 wt % AF.…”

Section: Morphologysupporting

confidence: 87%

“…They are also susceptible to moisture absorption, which affects the dimensional stability and overall performance of the composites [7]. Nevertheless, under optimized processing parameters, they can be processed via injection [8], compression [9] and rotational molding, with properties and design suitable for any particular application [10].…”

Section: Introductionmentioning

confidence: 99%

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Morphological and Mechanical Properties of Bilayers Wood-Plastic Composites and Foams Obtained by Rotational Molding

et al. 2020

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In this work, the suitability for the production of sustainable and lightweight materials with specific mechanical properties and potentially lower costs was studied. Agave fiber (AF), an agro-industrial waste, was used as a reinforcement and azodicarbonamide (ACA) as a chemical blowing agent (CBA) in the production of bilayer materials via rotational molding. The external layer was a composite of linear medium density polyethylene (LMDPE) with different AF contents (0–15 wt %), while the internal layer was foamed LMDPE (using 0–0.75 wt % ACA). The samples were characterized in terms of thermal, morphological and mechanical properties to obtain a complete understanding of the structure-properties relationships. Increases in the thicknesses of the parts (up to 127%) and a bulk density reduction were obtained by using ACA (0.75 wt %) and AF (15 wt %). Further, the addition of AF increased the tensile (23%) and flexural (29%) moduli compared to the neat LMDPE, but when ACA was used, lower values (75% and 56% for the tensile and flexural moduli, respectively) were obtained. Based on these results, a balance between mechanical properties and lightweight can be achieved by selecting the AF and ACA contents, as well as the performance and aesthetics properties of the rotomolded parts.

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Section: Morphologysupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Morphological and Mechanical Properties of Bilayers Wood-Plastic Composites and Foams Obtained by Rotational Molding

et al. 2020

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“…On the other hand, the tensile strength was substantially increased when MAPE was used. As reported several times in the literature, the presence of MAPE on the surface of maple fibers can improve the interfacial strength leading to better stress transfer from the matrix to the fibers . For example, the tensile strength increased by 56% and 42% for S20M75T and S20L75T compared to S20M75U and S20L75U, respectively (Fig.…”

Section: Resultssupporting

confidence: 55%

Rotational molding of self‐hybrid composites based on linear low‐density polyethylene and maple fibers

Hanana

Rodrigue

2017

Polymer Composites

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In this study, the morphological, physical, and mechanical properties of maple fiber self‐hybrid composites reinforced linear low‐density polyethylene (LLDPE) have been investigated for different concentration (10, 20, and 30%) and ratio (100/0, 75/25, 50/50, 25/75, and 0/100) of short (125–250 μm), medium (250–355 μm), and long (355–500 μm) fibers. Maple surface treatment with a coupling agent (maleated polyethylene, MAPE) was also investigated. The results show that surface treatment increased the tensile modulus and strength, and impact strength. Finally, the self‐hybrid composites gave better properties than single size fibers since a positive deviation from the linear law of mixture was observed, especially at 20% wt. For example, a 75/25 ratio of medium/short or long/short fibers produced a tensile modulus and tensile strength between 13% and 33% higher than composites formulated with a single fiber size. POLYM. COMPOS., 39:4094–4103, 2018. © 2017 Society of Plastics Engineers

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“…The spectrum obtained for the untreated coir fiber (CUF) presents the characteristic band of the lignocellulosic fibers hydroxyls (‐OH) around 3,288 cm −1 , as well as the characteristic peaks of the C‐H bond around 2,940 cm −1 belonging to cellulose and hemicelluloses. In addition, a carbonyl signal (C=O) appears at 1,737 cm −1 due to the presence of extractives (waxes and pectins) . The MAPLA treated fibers (CT‐MAPLA) present a less intense band for the hydroxyl groups at 3,335 cm −1 , which is due to the esterification reaction carried out between the –OH and the MA functional groups grafted to the PLA structure.…”

Section: Resultsmentioning

confidence: 99%

“…In this case, the tensile strength remained unchanged at 1 wt%, while increasing the amount produced lower values. Cisneros et al reported important mechanical properties improvements of polyethylene/treated agave fibers composites produced by compression molding and rotational molding. The fiber treatment was carried out prior to molding via MA‐grafted polyethylene in solution.…”

Section: Introductionmentioning

confidence: 99%

Effect of surface treatment on the physical and mechanical properties of injection molded poly(lactic acid)‐coir fiber biocomposites

et al. 2018

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In this study, two different surface treatments were evaluated to improve the compatibility of coir fibers with poly(lactic acid). The chemical modifications were achieved by fiber surface treatment with a maleic anhydride grafted to poly(lactic acid) (MAPLA) solution or a poly(methyl vinyl ether-alt-maleic anhydride) (MA-c-PMVE) aqueous solution. The fibers were analyzed by attenuated total reflectance-Fourier transform infrared to determine the type and level of surface modification. The biocomposites were compounded via extrusion and molded by injection. Mechanical testing showed increases in tensile modulus (around 16%) and flexural modulus (around 16%) for both treatments, but MA-c-PMVE (29%) was more effective than MAPLA (15%) in strength improvement. Finally, the surface treated fibers led to much lower biocomposites water absorption than untreated ones. a CUF, untreated coir fibers. b CT-MAPLA, coir-treated fibers with MAPLA. c CT-PMVE coir-treated fibers with MA-c-PMVE. FIG. 3. ATR-FTIR spectra of the original and modified coir fibers.

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Effect of fiber content and surface treatment on the mechanical properties of natural fiber composites produced by rotomolding

Cited by 89 publications

References 37 publications

Morphological and Mechanical Properties of Bilayers Wood-Plastic Composites and Foams Obtained by Rotational Molding

Morphological and Mechanical Properties of Bilayers Wood-Plastic Composites and Foams Obtained by Rotational Molding

Rotational molding of self‐hybrid composites based on linear low‐density polyethylene and maple fibers

Effect of surface treatment on the physical and mechanical properties of injection molded poly(lactic acid)‐coir fiber biocomposites

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