Sustainable 3D printed composites from recycled ocean plastics and pyrolyzed soy-hulls: Optimization of printing parameters, performance studies and prototypes development

Maldonado-García, Benjamin; Pal, Akhilesh Kumar; Misra, Manjusri; Gregori, Stefano; Mohanty, Amar K.

doi:10.1016/j.jcomc.2021.100197

Cited by 25 publications

(20 citation statements)

References 45 publications

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“…The decrease in elongation at break was due to increased molecular weight, the branching of polymeric chain and the presence of triangular voids in the 3D printed product [ 69 ]. In another study, high-density polyethylene (HDPE) and polypropylene (PP) waste derived from the ocean were blended with different proportions of agro-industrial waste (bio-carbon) [ 70 ] used to prepare composite filaments for 3D printing. It was found that the 3D printed R-HDPE/ R-PP (70:30) blend alone shows 34% improvement in Young’s modulus, while the addition of 20% bio-carbon in the blend shows improvement by 11–15% in the mechanical properties.…”

Section: Use Of Additivesmentioning

confidence: 99%

“… PLA V-PLA/ R-PLA Single screw – Pramaan mini 37.829 Upgrading the properties of the recycled polymer Maximum TS with 10% R-PLA [ 68 ] 2. HDPE PP R-HDPE/R-PP/soy hull Biocarbon (size: 2 µm) Twin screw 1.75 Lulzbot Taz 6 38–40 Developing cost-effective composite enhances the analytical properties and develops lightweight composites Addition of biochar creates porous structure and lightweight material (spectacle frame, elliptical gears) [ 70 ] 3. HDPE PP o-HDPE/o-PP/V-HDPE/V-LDPE/clay/EPR 3-Devo 350 Composer 1.75 Creality 3-D printer 21.4 ± 0.9 Improving the compatibility among immiscible blends Addition of EPR increased elasticity of material [ 71 ] 4.…”

Section: Use Of Additivesmentioning

confidence: 99%

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FDM-based additive manufacturing of recycled thermoplastics and associated composites

Mishra

Negi

Kar

2023

J Mater Cycles Waste Manag

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Hailed since the fourth industrial revolution, three-dimensional (3D) printing or additive manufacturing (AM) has been extensively implemented in various manufacturing sectors. This process is popular for generating regular products and incorporating innovative designs into the components like auxetic structures, such as fabrication of engineering products, customized implants and sophisticated biomedical devices. Over the years, one of the interesting outputs of this emerging technology is the reuse of waste thermoplastic materials to produce competent products through the fused deposition modeling (FDM) technique. The strength of FDM components produced from thermoplastic waste is lower than that of virgin plastic FDM counterparts. So, there is a need to understand the significant changes in the recycled thermoplastic material during subsequent extrusions, which are chain scission, change in viscosity and breaking strength. The use of additives has been a promising solution to improve the performance of recycled material for 3D printing applications. Hence, this study aims to provide an overview of reusing plastic waste through FDM-based 3D printing. This review summarizes the current knowledge about the effect of processing on thermo-mechanical properties of recycled plastic FDM parts and the use of various additives to improve the overall quality. In addition, two case studies from open literature have been demonstrated to explain the use of FDM and associated technology for plastic recycling.

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Section: Use Of Additivesmentioning

confidence: 99%

Section: Use Of Additivesmentioning

confidence: 99%

FDM-based additive manufacturing of recycled thermoplastics and associated composites

Mishra

Negi

Kar

2023

J Mater Cycles Waste Manag

View full text Add to dashboard Cite

show abstract

“…However, no significant voids and/or discontinuities between the printed filaments in the interlayer were observed in the remanufactured samples corresponding to 3P‐R, 6P‐R, and 9P‐R. The reason was that in the vicinity of proper melt flow, the printing filaments showed strong lateral flow during deposition, which results in improved cohesion between adjacent strands 46,47 . On the contrary, when the MFI of the printed filaments was too high, there was material spillage or inadequate curing of the materials.…”

Section: Resultsmentioning

confidence: 96%

“…The reason was that in the vicinity of proper melt flow, the printing filaments showed strong lateral flow during deposition, which results in improved cohesion between adjacent strands. 46,47 On the contrary, when the MFI of the printed filaments was too high, there was material spillage or inadequate curing of the materials. Thus, a precisely controlled filament bundle cannot be formed, resulting in the formation of voids and/or discontinuities.…”

Section: Morphological Analysesmentioning

confidence: 99%

Improving the mechanical properties of 3D printed recycled polypropylene‐based composites through adjusting printing temperature

Wang

Zhang

Cai

et al. 2023

J of Applied Polymer Sci

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This work aimed at investigating the effects of recycling on the mechanical properties of recycled polypropylene (PP)-based composites and improving the mechanical properties of recycled materials by adjusting the remanufacturing temperature. In this study, 3D printing was selected as the remanufacturing approach and the composites were ground and reextruded up to nine times to simulate mechanical recycling. The gel permeation chromatography results indicated that the recycling led to a reduction in molecular weight, increasing the melt fluidity of the materials. Excessive melt flow of material during printing caused the poor quality of printed parts with macro and micro defects, deteriorating the mechanical properties of the printed specimens. To improve the final quality and mechanical properties of the printed specimens, melt flow during the printing of recycled materials was adjusted by tuning the printing temperature. The results found that the mechanical properties of the recycled PP-based composites were well enhanced by using tuned printing temperature.

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“…When plastic waste is transformed into these new products, there are many essential factors that need to be considered, as the addition of plastic waste can affect the performance of the composite materials produced [238]. In particular, the scientific community has focused on suggesting alternatives for the inclusion of plastic waste in various sectors, such as construction materials [238][239][240][241][242], ultrafiltration membranes for water treatment [243][244][245], 3D printing [246][247][248][249], components in asphalt [250][251][252][253], wallpaper [254], and the agricultural sector [255], among others, as shown in Figure 3. Plastic waste can also be recycled and used to make composite materials.…”

Section: Accumulation Of Plastic Waste In the Environmentmentioning

confidence: 99%

Conversion of Plastic Waste into Supports for Nanostructured Heterogeneous Catalysts: Application in Environmental Remediation

et al. 2021

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Plastics are ubiquitous in our society and are used in many industries, such as packaging, electronics, the automotive industry, and medical and health sectors, and plastic waste is among the types of waste of higher environmental concern. The increase in the amount of plastic waste produced daily has increased environmental problems, such as pollution by micro-plastics, contamination of the food chain, biodiversity degradation and economic losses. The selective and efficient conversion of plastic waste for applications in environmental remediation, such as by obtaining composites, is a strategy of the scientific community for the recovery of plastic waste. The development of polymeric supports for efficient, sustainable, and low-cost heterogeneous catalysts for the treatment of organic/inorganic contaminants is highly desirable yet still a great challenge; this will be the main focus of this work. Common commercial polymers, like polystyrene, polypropylene, polyethylene therephthalate, polyethylene and polyvinyl chloride, are addressed herein, as are their main physicochemical properties, such as molecular mass, degree of crystallinity and others. Additionally, we discuss the environmental and health risks of plastic debris and the main recycling technologies as well as their issues and environmental impact. The use of nanomaterials raises concerns about toxicity and reinforces the need to apply supports; this means that the recycling of plastics in this way may tackle two issues. Finally, we dissert about the advances in turning plastic waste into support for nanocatalysts for environmental remediation, mainly metal and metal oxide nanoparticles.

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Sustainable 3D printed composites from recycled ocean plastics and pyrolyzed soy-hulls: Optimization of printing parameters, performance studies and prototypes development

Cited by 25 publications

References 45 publications

FDM-based additive manufacturing of recycled thermoplastics and associated composites

FDM-based additive manufacturing of recycled thermoplastics and associated composites

Improving the mechanical properties of 3D printed recycled polypropylene‐based composites through adjusting printing temperature

Conversion of Plastic Waste into Supports for Nanostructured Heterogeneous Catalysts: Application in Environmental Remediation

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