Rotomolded polyethylene-agave fiber composites: Effect of fiber surface treatment on the mechanical properties

Cisneros-López, Erick Omar; Pérez‐Fonseca, Aida Alejandra; Talavera, Francisco Javier Fuentes; Anzaldo, J.; González‐Núñez, Rubén; Rodrigue, Denis; Robledo‐Ortíz, Jorge R.

doi:10.1002/pen.24314

Cited by 39 publications

(48 citation statements)

References 45 publications

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“…For compression molding, the elongation at break decreased from 3.5% (PLA) to around 2.1% (biocomposites). For both processing methods, the elongation at break reduction is related to the low elasticity of agave fibers . The statistically significant lower elongation at break of CM‐BC samples compared to rotomolded ones is probably related to the higher stiffness and strength of the compression‐molded composites as lower porosity allows for better interfacial stress transfer leading to stiffer and more brittle materials.…”

Section: Resultssupporting

confidence: 90%

“…This increase is mostly related to the higher agave fibers skeletal density (also called true or cell wall density) of 1.43 g/cm 3 . Cisneros‐López et al reported similar results for agave fiber reinforced PE composites produced by compression molding and rotomolding . On the other hand, it was observed that the bulk density of rotomolded (R‐BCs) and compression‐molded (CM‐BCs) biocomposites depends on the processing method.…”

Section: Resultssupporting

confidence: 84%

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Polylactic acid–agave fiber biocomposites produced by rotational molding: A comparative study with compression molding

Cisneros-López¹,

Pérez‐Fonseca²,

González‐García³

et al. 2017

Adv Polym Technol

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In this work, the possibility to produce polylactic acid (PLA) and agave fiber biocomposites by dry-blending and rotational molding was studied. The samples were also produced by compression molding to compare the effect of processing conditions on the biocomposites properties. In particular, the effect of fiber content (0-40 wt.%) on morphology, density, porosity, thermal (DSC) and mechanical properties (tension, flexion, impact and hardness) was studied. Also, a complete analysis of the internal air temperature profiles was performed to determine the thermal behavior of PLA during the rotational molding cycle. The results showed that rotomolded biocomposites were successfully produced but had higher porosity than compression molded ones due to the absence of pressure while forming. This led to different level of mechanical properties reduction as fiber content increases. Nevertheless, for compression-molded biocomposites, crystallinity (30% at 30 wt.%), tensile modulus (14% at 30 wt.%) and impact strength (71% at 40 wt.%) improvements were obtained compared to neat PLA. K E Y W O R D Sbiodegradable, composites, molding, natural fibers, polylactic acid | 2529 CISNEROS-LÓPEZ Et aL.

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Section: Resultssupporting

confidence: 90%

Section: Resultssupporting

confidence: 84%

Polylactic acid–agave fiber biocomposites produced by rotational molding: A comparative study with compression molding

Cisneros-López¹,

Pérez‐Fonseca²,

González‐García³

et al. 2017

Adv Polym Technol

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“…As mentioned above, this is related to poor interfacial adhesion between the fibers and the matrix [16]. To improve the interfacial interaction/adhesion, coupling agents and fiber surface treatments can be used [38]. When comparing the impact resistance results (Figure 8 and The results of Gardner's impact strength test on the outer surface and the inner surface as a function of ACA and AF content are shown in Figure 9.…”

Section: Morphologymentioning

confidence: 99%

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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“…Natural fiber flour reinforced composites are of great interest because of their recyclable, environmental friendly, biodegradable, and low cost characteristics . In addition, these composite materials may be used for engineering, packaging, automotive, and construction applications owing to their high strength to weight ratio, nontoxicity, and ease of processing . However, it has to be noted the presence of the natural fibers in a polymer matrix creates porosity at the interfaces owing to the interfacial tension between the hydrophilic fibers and the relatively hydrophobic polymer .…”

Section: Introductionmentioning

confidence: 99%

Predicting trends in structural and physical properties of a model polymer with embedded natural fibers: Viability of molecular dynamics studies for a bottom up design

Prasad

Nikzad

Doherty

et al. 2019

J of Applied Polymer Sci

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The effects of relatively high-and low-shear processing on the macroscopic and microscopic porosities of a standard packaging polymer-linear low density polyethylene (LLDPE) and its composites with pine flour are studied. The macroscopic porosities, represented by deviations of observed density from the theoretical density, primarily drive the trends in mechanical and solvent uptake properties. The microscopic porosities of the system, however, are independent of the processing method and pine flour concentration. Furthermore, by using molecular dynamics (MD), molecules of LLDPE and pine flour were constructed. The material properties of the molecules, specifically microporosity and elastic moduli, were compared to experiment. A semiempirical modeling approach was used to fit the simulated data to the experimental composite moduli. The model of Halpin and Tsai was found to be the most efficacious for this system, and the benefits of the combined MD-semiempirical modeling for bottom up design are discussed.

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Rotomolded polyethylene-agave fiber composites: Effect of fiber surface treatment on the mechanical properties

Cited by 39 publications

References 45 publications

Polylactic acid–agave fiber biocomposites produced by rotational molding: A comparative study with compression molding

Polylactic acid–agave fiber biocomposites produced by rotational molding: A comparative study with compression molding

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

Predicting trends in structural and physical properties of a model polymer with embedded natural fibers: Viability of molecular dynamics studies for a bottom up design

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