Micro- and Macromechanical Properties of a Composite with a Ternary PLA–PCL–TPS Matrix Reinforced with Short Fique Fibers

Mina, José Santiago Arroyo; González, Alex Valadez; Muñoz-Vélez, Mario Fernando

doi:10.3390/polym12010058

Cited by 11 publications

(8 citation statements)

References 29 publications

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“…It is also noted that, due to their good mechanical properties and the technological development associated with its extraction process, fique fibers have also been considered as reinforcement in plastic matrix composite materials. [ 20 , 21 , 22 , 23 ]. In the same manner, this work contemplated the obtained biobased composite of Mopa-Mopa resin with 10 and 20% (m/m) of fique fibers, the evaluation effect of the fiber superficial modification process (by alkalization) and the exposure of the material to three different relative humidities (47, 77 and 97%), in its physicochemical and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of Fique Fibers in the Behavior of a New Biobased Composite from Renewable Mopa-Mopa Resin

et al. 2020

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A fully biobased composite was developed using a natural resin from the Elaeagia Pastoensis Mora plant, known as Mopa-Mopa reinforced with fique fibers. Resin extraction was through solvent processing reaching an efficient extraction process of 92% and obtaining a material that acted as a matrix without using any supplementary chemical modifications as it occurs with most of the biobased resins. This material was processed by the conventional transform method (hot compression molding) to form the plates from which the test specimens were extracted. From physicochemical and mechanical characterization, it was found that the resin had obtained a tensile strength of 15 MPa that increased to values of 30 MPa with the addition of 20% of the fibers with alkalization treatment. This behavior indicated a favorable condition of the fiber-matrix interface in the material. Similarly, the evaluation of the moisture adsorption in the components of the composite demonstrated that such adsorption was mainly promoted by the presence of the fibers and had a negative effect on a plasticization phenomenon from humidity that reduced the mechanical properties for all the controlled humidities (47%, 77% and 97%). Finally, due to its physicochemical and mechanical behavior, this new biobased composite is capable of being used in applications such as wood–plastic (WPCs) to replace plastic and/or natural wood products that are widely used today.

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Section: Introductionmentioning

confidence: 99%

Effect of Fique Fibers in the Behavior of a New Biobased Composite from Renewable Mopa-Mopa Resin

et al. 2020

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“…A digital displacement indicator with a resolution of 0.01 mm was used. With the results obtained from this test, it was possible to calculate the interfacial shear strength using equation one 20,21 where τ is the interfacial shear strength; F is the maximum load measured before the pull-out of the fiber; D is the diameter of the fiber, and L is the embedded length of the fiber in the matrix.…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Recycled thermoplastic polyurethane as a coupling agent in automotive polypropylene compounds with coconut fibers

Guillén-Mallette

Valadez-González

Rosado-Sánchez

2022

Journal of Thermoplastic Composite Materials

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This study evaluates the effect of recycled thermoplastic polyurethane (RTPU) on the Izod impact resistance of polypropylene (PP) compounds with 50% coconut fibers arranged randomly. The Izod impact resistance was compared to the performance of a commercial coupling agent (CCA) of maleic anhydride grafted PP copolymer (MAPP). The PP compounds were made with 0, 2.5, and 5% by weight of RTPU or CCA, and with 50% of short or long coconut fibers, in the form of plates molded by thermo-compression, where the plastic components were previously extruded in the form of filaments. The morphology of the resulting materials was studied by scanning electron microscopy (SEM). The functional groups and their possible interactions present were determined by Fourier transform infrared spectroscopy (FTIR). Furthermore, the interfacial shear strength between the polymeric matrix and the coconut fiber was determined. The results showed a higher Izod impact resistance and a higher adhesion between long coconut fiber and PP when they contain 5% RTPU. This is explained by the higher interfacial shear strength between them given by the chemical and/or physical interaction between functional groups such as the lignin of coconut fibers and the isocyanate groups of RTPU, which in turn determined the shortest critical length of coconut fiber. The impact resistance values ranged from 19.8 to 24.4 J/m for mixtures of PP with short coconut fibers and 39.9–71.7 J/m for PP with long coconut fibers.

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“…When the fiber length embedded in the droplet decreased, the measured IFSS tended to similarly decrease, in agreement with previous studies. 64,65 In addition, rounder droplets tended to produce a higher IFSS, although it is difficult to prepare spherical droplets of PCL. However, the direct result of these microdebonding experiments is that the Ap silk-PCL exhibits the highest IFSS among the three fibers.…”

Section: Interfacial Shear Strength From Microdebondingmentioning

confidence: 99%

Understanding the Interfacial Adhesion between Natural Silk and Polycaprolactone for Fabrication of Continuous Silk Biocomposites

Shi

et al. 2022

ACS Appl. Mater. Interfaces

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The poor interfacial adhesion between silk fiber and polyester species remains a critical problem for the optimal mechanical performance of silk-reinforced polyester composites. Here, we investigated in quantitative terms the interfacial properties between natural silk fibers and polycaprolactone (PCL) at nano-, micro-, and macroscales and fabricated continuous silk-PCL composite filaments by melt extrusion and drawing processing of PCL melt at 100, 120, and 140 °C. Bombyx mori (Bm) silk, Antheraea pernyi (Ap) silk, and polyamide6 (PA6) fiber were compared to the composite with PCL. The Ap silk exhibited the highest surface energy, the best wettability, and the largest interfacial shear strength (IFSS) with PCL. The silk-PCL composite from the 120 °C melt processing displayed the highest tensile modulus, implying an optimal temperature for interfacial adhesion. The Raman imaging technique revealed in detail the nature of the physical fusion of the interface phase in these silk-and polyamide-reinforced PCL composites. This work is intended to lay a foundation for the design and processing of robust composites from continuous silk fibers and bioresorbable polyesters for potential structural biomaterials.

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Micro- and Macromechanical Properties of a Composite with a Ternary PLA–PCL–TPS Matrix Reinforced with Short Fique Fibers

Cited by 11 publications

References 29 publications

Effect of Fique Fibers in the Behavior of a New Biobased Composite from Renewable Mopa-Mopa Resin

Effect of Fique Fibers in the Behavior of a New Biobased Composite from Renewable Mopa-Mopa Resin

Recycled thermoplastic polyurethane as a coupling agent in automotive polypropylene compounds with coconut fibers

Understanding the Interfacial Adhesion between Natural Silk and Polycaprolactone for Fabrication of Continuous Silk Biocomposites

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