The Recycling of Sugarcane Fiber/Polypropylene Composites

Leão, Rosineide Miranda; Luz, Sandra M.; Araújo, J.A.; Christofóro, André Luis

doi:10.1590/1516-1439.321314

Cited by 14 publications

(7 citation statements)

References 22 publications

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“…[ 1 ] The physical modification includes simple milling, corona, plasma, ultraviolet (UV), heat treatments, and fiber beating. [ 1 ] Some works have been conducted using simple milling approach to investigat SGF composites in the different matrices, including polypropylene [ 2 ] and polyethylene. [ 3 ] To further enhance the chemical bonding between the fiber surface and matrix resin by removing some impurities, oil, and wax and impart the numbers of surface hydroxyl groups for further reaction, chemical modifications, including alkali, silane, benzyl, maleated anhydride, and so forth, were often used.…”

Section: Introductionmentioning

confidence: 99%

Properties of sugarcane fiber/polyurethane‐crosslinked epoxy composites under different interfacial treatments

et al. 2020

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The effect of the ultrasonic/mechanical stirring method (physical treatment) and 3-glycidoxypropyltrimethoxy silane (GPS, chemical treatment) modifications on the sugarcane fiber (SGF)/epoxy composites was investigated to improve the interfacial interaction between fiber and epoxy resin. An optimum concentration GPS at 2 wt% was found for the best improvement in tensile strength at 40 wt% SGF content based on the evaluation of GPS content, indicating the role of GPS as an effective coupling agent. Overall, the best improvement in tensile strength was observed for GPS-modified cases, and particularly tensile strength reached up to 32.9 MPa at 50 wt% of fiber content. In addition, three types of Polyurethane (PU)-modified epoxy with different polyols at various SGFs contents were investigated. In all cases, the tensile strength of SGF/PU-epoxy cases was higher than that of SGF/epoxy cases due to the relatively lower viscosity of PU-epoxy to easily wet the SGF surface. In general, impact strength for samples without physical or chemical treatment also ranked the lowest value in most cases. The enhanced interfacial interaction between SGF and epoxy for surface-modified cases was suggested through the morphology observation, dynamical mechanical analysis, and the onset degradation improvement in thermal stability.

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Section: Introductionmentioning

confidence: 99%

Properties of sugarcane fiber/polyurethane‐crosslinked epoxy composites under different interfacial treatments

et al. 2020

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“…Regarding the polypropylene (PP) matrix used in this paper, countless works 2,4,8,9 have been researching the effect of their recycling, since this is a matrix used in the construction of composites reinforced with natural fibers. In Guerrica-Echevarria et al 10 the effects of repetitive injection molding cycles were studied and it was found that the rheological and mechanical properties of pure PP remain virtually unchanged during the first four recycling cycles.…”

Section: Introductionmentioning

confidence: 99%

“…Most investigations on the recycling of composites made of PP with natural fiber focus on fiber change, where PP is combined with flax, hemp, sisal, wood, kenaf, rice husks, cane fiber, and wood powder fibers. 2,9,12,15–17 The results of some of these works consisted of small reductions in tensile strength and in the modulus of elasticity after the recycling process, in others the mechanical properties are practically unchanged. 2 However, studies on the effect of reprocessing on the change in mechanical properties are scarce, 14,18 needing further studies on the subject.…”

Section: Introductionmentioning

confidence: 99%

Recycling of polypropylene and curaua fiber-based ecocomposites: Effect of reprocessing on mechanical properties

Bispo

Júnior

Barbosa

et al. 2021

The Journal of Strain Analysis for Engineering Design

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The polypropylene with load of reinforcement of curauá fiber (PP-curauá) is a compound developed to be applied in the process of injection of automotive plastic parts. Polypropylene composites reinforced with mineral fillers (talc) or glass fibers have been widely applied in this segment. However, natural fibers are an important alternative considering the aspects of sustainability, recyclability, abundance and low cost, when compared with glass fibers, and industrial talc. This study was prompted by the growing need for materials that meet the constant cycles of use, disposal and reuse, and avoid the harmful effects on the environment. The mechanical properties of a curaua fiber and polypropylene-based ecocomposite reprocessed one, three and five times were assessed, since reprocessing is known to change the strength of these materials. Pure polypropylene (0%) and ecocomposites with 10 and 30 wt% of fiber were submitted to tensile and three-point bending tests. The results showed that polypropylene ecocomposites with 30% curaua fibers exhibited a higher modulus of elasticity. Moreover, reprocessing did not significantly affect the ecocomposite properties, demonstrating their viability for reuse.

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“…On the other hand, a plastic waste is defined as the material recovered by the final users after having complied with the use for which it was produced [2,3]. This type of waste is classified in two categories: postconsumer plastic and postindustrial.…”

Section: Introductionmentioning

confidence: 99%

“…In most of published cases in literature, the use of natural fibers combined with polymers is carried out to achieve some degree of reinforcement from the fibers to the polymer. Many studies report the use of natural fibers such as flax, hemp, jute, sisal, coconut fiber, banana, and fique, among many others [16], using an extensive variety of polymer matrices like polyethylene [17,18], polypropylene (PP) [19] polystyrene (PS) [20], epoxy resin (EP) [21], natural rubber [22], and recycled polypropylene (r-PP) [2]. Clear effects have been seen in the improvement of mechanical and thermal performance.…”

Section: Introductionmentioning

confidence: 99%

Recycled Polypropylene-Coffee Husk and Coir Coconut Biocomposites: Morphological, Mechanical, Thermal and Environmental Studies

Hidalgo-Salazar¹,

Correa-Aguirre²,

Montalvo-Navarrete³

et al. 2020

Thermosoftening Plastics

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In this work, biocomposites based on recycled polypropylene (r-PP) and two different natural fibers (coffee husk-CHF and coconut coir-CCF fibers) were prepared using extrusion and injection molding processes. Also, the addition of maleated polypropylene (MAPP) as a coupling agent on the biocomposites was explored. Recycled polypropylene and its biocomposites were tested following ASTM standards in order to evaluate tensile and flexural mechanical properties. Also, thermal behavior and the morphology of these materials have been studied by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and scanning electronic microscopy (SEM). The experimental results showed that the addition of CHF and CCF to the r-PP resulted in an increase in the flexural modulus and thermal properties of the composites but resulted in poor impact properties. Thermal characterization showed that CHF possesses a better thermal stability compared to CCF. However, both fibers act as nucleating agents and generate an increase in the thermal stability of the r-PP phase. Finally, it was observed that addition of 4% of MAPP significantly improved the mechanical strength and impact behavior of the biocomposites. Regarding environmental issues, a cradle to gate life cycle assessment was made in order to define the carbon footprint of the materials.

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The Recycling of Sugarcane Fiber/Polypropylene Composites

Cited by 14 publications

References 22 publications

Properties of sugarcane fiber/polyurethane‐crosslinked epoxy composites under different interfacial treatments

Properties of sugarcane fiber/polyurethane‐crosslinked epoxy composites under different interfacial treatments

Recycling of polypropylene and curaua fiber-based ecocomposites: Effect of reprocessing on mechanical properties

Recycled Polypropylene-Coffee Husk and Coir Coconut Biocomposites: Morphological, Mechanical, Thermal and Environmental Studies

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