Eco composites with synergistic combinations of natural rubber latex and wood flour toughened recycled HDPE

Bijaisoradat, Orachitr; Luttapreecha, Monjira; Manuspiya, Hathaikarn

doi:10.1016/j.mtcomm.2020.101483

Cited by 10 publications

(7 citation statements)

References 31 publications

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“…According to a research report, approximately 360 million tons of plastic product parts are manufactured globally, due to the increasing demand of durable and lightweight parts [1]. Moreover, due to poor waste management, more than 9 billion tons of plastic and plastic byproducts end up in the environment annually [1][2][3][4]. Breaking down those numbers to the core, polyolefin resins, such as High-Density Polyethylene (HDPE), Polystyrene (PS), Polypropylene (PP) and Polyethylene Terephthalate (PET) are the ones mostly used to produce the aforementioned plastic parts.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Additive Manufacturing: Mechanical Response of Polypropylene over Multiple Recycling Processes

et al. 2020

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The recycling of polymeric materials has received a steadily growing scientific and industrial interest due to the increase in demand and production of durable and lightweight plastic parts. Recycling of such materials is mostly based on thermomechanical processes that significantly affect the mechanical, as well as the overall physicochemical properties of polymers. The study at hand focuses on the recyclability of Fused Filament Fabrication (FFF) 3D printed Polypropylene (PP) for a certain number of recycling courses (six in total), and its effect on the mechanical properties of 3D printed parts. Namely, 3D printed specimens were fabricated from non-recycled and recycled PP material, and further experimentally tested regarding their mechanical properties in tension, flexion, impact, and microhardness. Comprehensive dynamic scanning calorimetry (DSC), thermogravimetric analysis (TGA), Raman spectroscopy, and morphological investigations by scanning electron microscopy (SEM) were performed for the different 3D printed PP samples. The overall results showed that there is an overall slight increase in the material’s mechanical properties, both in tension and in flexion mode, while the DSC characterization indicates an increase in the polymer crystallinity over the recycling course.

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Section: Introductionmentioning

confidence: 99%

Sustainable Additive Manufacturing: Mechanical Response of Polypropylene over Multiple Recycling Processes

et al. 2020

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“…Bijaisoradat et al evidenced similar behavior when studied eco composites with synergistic combinations of natural rubber latex and wood flour toughened recycled HDPE. 50 The use of MAPE in composites did not interfere in thermal stability.…”

Section: Resultsmentioning

confidence: 97%

“…The reduction of impact strength as increasing the filler content has been reported by some researchers. 50,57 Also, the decreasing impact strength is caused by poor interfacial adhesion between fiber and matrix. According to Siregar et al the poor interfacial bonding comprises micro-spaces between the fiber and the matrix polymer, prompting numerous micro-spaces or micro-cracks when an impact occurs.…”

Section: Resultsmentioning

confidence: 99%

“…Bijaisoradat et al also observed a single step process with a T onset at 471.5°C for recycled high density polyethylene (HDPE). 50 The addition of fiber in the PEr matrix caused a decrease in T onset , due to dehydration from cellulose unit and thermal cleavage of glycosidic linkage by transglycosylation and scission of C–O and C–C bonds, that is, the thermal depolymerization of hemicellulose and the glycosidic linkages of cellulose. 48,51 Subsequent decomposition occurred between 340 and 600°C.…”

Section: Resultsmentioning

confidence: 99%

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Green composites using recycled plastic bags and pineapple fibers waste

Gandara

Zanini

Saron

et al. 2022

Journal of Composite Materials

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This study proposes that green composites using recycled plastic bags (PEr) extruded with pineapple fiber waste (PR) from a juice industry to increase pineapple’s economic value stimulate practices that prioritize recycling and development of new materials. PEr composites were prepared using PR as a filler, using different fiber loadings of 5, 10, and 15 wt%, and the use of a coupling agent, prepared via extrusion and injection molding. The samples were investigated by Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis, inflammability, mechanical tests (tensile, impact, and shore hardness), scanning electron microscopy, and water absorption tests. FTIR results demonstrated that the addition of PR to the PEr caused a decrease in the characteristic bands of neat PEr, evidencing the chemical interactions. Thermal analysis showed that the addition PR decreased composites' thermal stability, causing relatively higher percentages of char compared to neat PEr, which increased the burning rate of composites, except for PEr/15PR and PEr/5PR-C. Green composites exhibited higher tensile modulus and hardness than PEr, but the impact tests presented a decrease in the fibers' addition to the PEr due to the reduction of toughness and resilience. SEM of fractured surface composites presented microcracks, voids, and fibers breakage in the interface. The composites showed low water absorption (up to 0.804%). The coupling agent’s use presented a low influence on the mechanical and thermal properties and a slight decrease in water absorption. These results demonstrate o potential of the reuse of plastic bags and industrial waste for green composites.

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“…In 2019, approximately 359 million tons of plastic products were produced worldwide due to increasing demand of lightweight, durable parts. Due to poor waste management globally, nine billion tons of plastic ends up in the environment annually [1][2][3][4]. Polymer resins such as polystyrene (PS), low density polyethylene (LDPE), high density polyethylene (HDPE), and polyethylene terephthalate (PET) are used to produce the most plastic parts available globally.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Additive Manufacturing: Mechanical Response of High-Density Polyethylene over Multiple Recycling Processes

2021

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Polymer recycling is nowadays in high-demand due to an increase in polymers demand and production. Recycling of such materials is mostly a thermomechanical process that modifies their overall mechanical behavior. The present research work focuses on the recyclability of high-density polyethylene (HDPE), one of the most recycled materials globally, for use in additive manufacturing (AM). A thorough investigation was carried out to determine the effect of the continuous recycling on mechanical, structural, and thermal responses of HDPE polymer via a process that isolates the thermomechanical treatment from other parameters such as aging, contamination, etc. Fused filament fabrication (FFF) specimens were produced from virgin and recycled materials and were experimentally tested and evaluated in tension, flexion, impact, and micro-hardness. A thorough thermal and morphological analysis was also performed. The overall results of this study show that the mechanical properties of the recycled HDPE polymer were generally improved over the recycling repetitions for a certain number of recycling steps, making the HDPE recycling a viable option for circular use. Repetitions two to five had the optimum overall mechanical behavior, indicating a significant positive impact of the HDPE polymer recycling aside from the environmental one.

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Eco composites with synergistic combinations of natural rubber latex and wood flour toughened recycled HDPE

Cited by 10 publications

References 31 publications

Sustainable Additive Manufacturing: Mechanical Response of Polypropylene over Multiple Recycling Processes

Sustainable Additive Manufacturing: Mechanical Response of Polypropylene over Multiple Recycling Processes

Green composites using recycled plastic bags and pineapple fibers waste

Sustainable Additive Manufacturing: Mechanical Response of High-Density Polyethylene over Multiple Recycling Processes

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