Incorporating Textile-Derived Cellulose Fibers for the Strengthening of Recycled Polyethylene Terephthalate for 3D Printing Feedstock Materials

Carrete, Israel A.; Quiñonez, Paulina A.; Bermudez, Diego; Roberson, David A.

doi:10.1007/s10924-020-01900-x

Cited by 34 publications

(25 citation statements)

References 33 publications

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“…The 3D printable composite filaments have been made from cardboard dust and high density polyethylene (HDPE) [ 18 ]. Waste products have been proposed for 3D printing applications: post-consumer textile waste and polyethylene terephthalate (PET) water bottles were melt compounded to form a monofilament feedstock for extrusion-based 3D printing platforms [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Rotational Rheology of Wood Flour Composites Based on Recycled Polyethylene

2021

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In this paper, we study the effect of the addition of wood flour as a filler in a recycled polyethylene (r-PE) in view of its potential applications in 3D printing. The composites, prepared by melt mixing, are characterized with torque measurements performed during the compounding, dynamic rotational rheology, and infrared spectroscopy. Data show that the introduction of wood results in increased viscosity and in sensible viscous heating during the compounding. The r-PE appear to be stable at temperatures up to 180 °C while at higher temperatures the material shows a rheological response characterized by time-increasing viscoelastic moduli that suggests a thermal degradation governed by crosslinking reactions. The compounds (with wood loading up to 50% in wt.) also shows thermal stability at temperatures up to 180 °C. The viscoelastic behavior and the infrared spectra of the r-PE matrix suggests the presence of branches in the macromolecular structure due to the process. Although the addition of wood particles determines increased viscoelastic moduli, a solid-like viscoelastic response is not shown even for the highest wood concentrations. This behavior, due to a poor compatibility and weak interfacial adhesion between the two phases, is however promising in view of common processing technologies as extrusion or injection molding.

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Section: Introductionmentioning

confidence: 99%

Rotational Rheology of Wood Flour Composites Based on Recycled Polyethylene

2021

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“…This confirms the trend of discussing plastic recycling in the context of the circular economy. For instance, the topics in 2020 associated with plastic recycling and circular economy mostly discussed the mechanical recycling process and the quality of mechanically recycled plastics [73][74][75][76][77][78], plastic waste flows and the associated environmental challenges [79][80][81], and challenges and solutions to the plastic waste recycling [82][83][84][85][86][87]. In this field, 86 reviewed research combining recycled plastic and additive manufacturing as a path towards a circular economy.…”

Section: State-of-the-art In Literature and Trends Towards Plastic Recyclingmentioning

confidence: 99%

Towards Higher Quality of Recycled Plastics: Limitations from the Material’s Perspective

et al. 2021

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The increasing consumption of plastics and plastic products results in correspondingly substantial volumes of waste, which poses considerable environmental burdens. With the ongoing environmental actions, the application of circular economy on this waste stream is becoming inevitable. In this paper, the topics of plastics recycling, circular economy on plastics, and challenges to plastic waste recycling are critically reviewed. In the first part of this paper, the development of research on plastic recycling was viewed from 1950 until 2020 using the scientific database Web of Science, and 682 related studies were found and used to assess the changing research priorities along that timeline. The following sections discuss the potentials and requirements to enhance the quality of the produced recycled plastic, in connection with the factors that currently limit it. In conclusion, the quality of recycled plastic is generally determined by the homogeneity of the recovered plastic feed. There are various strategies which could be implemented to overcome the hindrances identified in the paper and to improve the quality of the recycled plastic, such as working on enhanced product designs for minimised waste heterogeneity and controlling the materials’ degree of contamination by applying advanced sorting.

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“…To the best of the authors' knowledge, this is the first study investigating the electrically and thermally conductive properties of the green composites from disposable mask fragments. The obtained composites could be applied to the fields of sustainable railway sleepers [13], 3D printing feedstock materials [14] and low value building materials [15]. The importance of this research gets highlighted when we consider that the reuse of disposable mask fragments may be an environmental and economic solution, which could help to the efficient elimination of waste materials from the biosphere to some extent.…”

Section: Introductionmentioning

confidence: 98%

Conductive Polymer Composites Fabricated by Disposable Face Masks and Multi-Walled Carbon Nanotubes: Crystalline Structure and Enhancement Effect

Xiang¹,

Zhou²,

Yang³

et al. 2022

Journal of Renewable Materials

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Influenced by recent COVID-19, wearing face masks to block the spread of the epidemic has become the simplest and most effective way. However, after the people wear masks, thousands of tons of medical waste by used disposable masks will be generated every day in the world, causing great pressure on the environment. Herein, conductive polymer composites are fabricated by simple melt blending of mask fragments (mask polypropylene, short for mPP) and multi-walled carbon nanotubes (MWNTs). MWNTs were used as modifiers for composites because of their high strength and high conductivity. The crystalline structure, mechanical, electrical and thermal enhancement effect of the composites were investigated. MWNTs with high thermal stability acted the role of promoting the crystallisation of mPP by expediting the crystalline nucleation, leading to the improvement of amount for crystalline nucleus. MWNTs fibers interpenetrate with each other in mPP matrix to form conducting network. With 2.0 wt% MWNTs loading, the tensile strength and electrical conductivity of the composites were increased by 809% and 7 orders of magnitude. MWNTs fibers interpenetrate with each other in mPP matrix to form conducting network. Thus, more conducting paths were constructed to transport carriers. The findings may open a way for high value utilization of the disposable masks.

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Incorporating Textile-Derived Cellulose Fibers for the Strengthening of Recycled Polyethylene Terephthalate for 3D Printing Feedstock Materials

Cited by 34 publications

References 33 publications

Rotational Rheology of Wood Flour Composites Based on Recycled Polyethylene

Rotational Rheology of Wood Flour Composites Based on Recycled Polyethylene

Towards Higher Quality of Recycled Plastics: Limitations from the Material’s Perspective

Conductive Polymer Composites Fabricated by Disposable Face Masks and Multi-Walled Carbon Nanotubes: Crystalline Structure and Enhancement Effect

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