Recycled polycarbonate from electronic waste and its use in concrete: Effect of irradiation

Martínez, Ana Laura De la Colina; Barrera, Gonzalo Martinez; Dı́az, Carlos; Córdoba, Liliana; Núñez, Fernando Ureña; Delgado-Hernández, David Joaquín

doi:10.1016/j.conbuildmat.2018.12.147

Cited by 57 publications

(12 citation statements)

References 12 publications

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“…It is widely used as an engineering thermoplastic because of its very good dimensional stability, excellent toughness and transparency [75]. The physical properties (including thermal and mechanical) of PC material are detailed in previous studies [3,76,77]. It also has some disadvantages in that it can cause problems or errors during the printing process.…”

Section: Polycarbonate or Pcmentioning

confidence: 99%

Post-Processing of 3D-Printed Polymers

et al. 2021

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Additive manufacturing, commonly known as 3D printing, is an advancement over traditional formative manufacturing methods. It can increase efficiency in manufacturing operations highlighting advantages such as rapid prototyping, reduction of waste, reduction of manufacturing time and cost, and increased flexibility in a production setting. The additive manufacturing (AM) process consists of five steps: (1) preparation of 3D models for printing (designing the part/object), (2) conversion to STL file, (3) slicing and setting of 3D printing parameters, (4) actual printing, and (5) finishing/post-processing methods. Very often, the 3D printed part is sufficient by itself without further post-printing processing. However, many applications still require some forms of post-processing, especially those for industrial applications. This review focuses on the importance of different finishing/post-processing methods for 3D-printed polymers. Different 3D printing technologies and materials are considered in presenting the authors’ perspective. The advantages and disadvantages of using these methods are also discussed together with the cost and time in doing the post-processing activities. Lastly, this review also includes discussions on the enhancement of properties such as electrical, mechanical, and chemical, and other characteristics such as geometrical precision, durability, surface properties, and aesthetic value with post-printing processing. Future perspectives is also provided towards the end of this review.

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Section: Polycarbonate or Pcmentioning

confidence: 99%

Post-Processing of 3D-Printed Polymers

et al. 2021

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“…A transparent polycarbonate sheet was selected as the top layer material for the pavement solar box. Polycarbonate (PC) is a high-performance thermoplastic with transparency and higher ductility, shear strength, and impact resistance [37]. PC materials possess an almost 250 times higher impact resistance than standard glass, which makes PC a very strong polymer [38].…”

Section: Top Layermentioning

confidence: 99%

Harvesting Solar Energy from Asphalt Pavement

et al. 2021

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This study aims at designing and developing a new technique to harvest solar energy from asphalt pavements. The proposed energy harvester system consists of a pavement solar box with a transparent polycarbonate sample and a thin-film solar panel. This device mechanism can store energy in a battery charged over daytime and later convert it into electric power as per demand. A wide range of polycarbonate samples containing different thicknesses, elastic moduli, and light transmission properties were tested to select the most efficient materials for the energy harvester system. Transmittance Spectroscopy was conducted to determine the percent light transmission property of the polycarbonate samples at different wavelengths in the visible spectrum. Finite Element Analysis modeling of the pavement–tire load system was conducted to design the optimal energy harvester system under static load. It was followed by the collection of data on the generated power under different weather conditions. The energy harvesters were also subjected to vehicular loads in the field. The results suggest that the proposed pavement solar box can generate an average of 23.7 watts per square meter continuously over 6 h a day under sunny conditions for the weather circumstances encountered in South Texas while providing a slightly smaller power output in other weather circumstances. It is a promising self-powered and low-cost installation technique that can be implemented at pedestrian crossings and intersections to alert distracted drivers at the time of pedestrian crossing, which is likely to improve pedestrian safety.

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“…[2] Mainly due to PC easy moulding processability, it is expected to have a continuous consumption growth in the next years. [3,4] Further, PC can be recycled to be used in optical discs, sheets and water containers. [3] The excellent intrinsic properties of PC makes it a very used material in various industries such as in the aeronautic and automobile sectors, [2] and even transparent as films for different electronic devices.…”

Section: Introductionmentioning

confidence: 99%

“…[3,4] Further, PC can be recycled to be used in optical discs, sheets and water containers. [3] The excellent intrinsic properties of PC makes it a very used material in various industries such as in the aeronautic and automobile sectors, [2] and even transparent as films for different electronic devices. [5] The overall mechanical properties of PC depend critically on its molecular weight.…”

Section: Introductionmentioning

confidence: 99%

Functional Piezoresistive Polymer‐Composites Based on Polycarbonate and Polylactic Acid for Deformation Sensing Applications

Dios

Gonzalo

Tubío

et al. 2020

Macro Materials & Eng

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Multifunctional composites for deformation sensing applications have been developed by solvent casting based on polycarbonate (PC) and polylactic acid (PLA) reinforced with carbon nanotubes (CNT). Composites shows homogeneous filler dispersion and low percolation threshold at 0.1 and 0.06 wt% CNT content for PLA and PC, respectively. The maximum electrical conductivity obtained for the larger filler contents is two order of magnitude higher for PLA composites than for PC ones, showing that the matrix influences the electrical properties of the composites. With respect to the mechanical characteristics, the samples show a maximum strain near 40% and 2.75% for composites with 0.25 and 1 wt% CNT content for PC and PLA, respectively, decreasing for larger filler contents. Concerning the piezoresistive response, 4‐point‐bending experiments from 0.1 to 5 mm, lead to a Gauge Factor (GF) of ≈1 for PC, showing that the piezoresistive response if determined by the geometrical response. On the other hand, PLA composites show GF of ≈3, revealing also intrinsic contributions, due to the variation of the filler network upon material deformation. The resistance variation upon mechanical bending deformation shows linear response for the composites near the percolation threshold and above, for both composites. A proof‐of‐concept of the functional sensing response for applications is achieved by measuring the bending deformation of an endoscope, showing that the developed sensors can determine the bending orientation and intensity, as predicted by the simulation model applied to the endoscope.

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Recycled polycarbonate from electronic waste and its use in concrete: Effect of irradiation

Cited by 57 publications

References 12 publications

Post-Processing of 3D-Printed Polymers

Post-Processing of 3D-Printed Polymers

Harvesting Solar Energy from Asphalt Pavement

Functional Piezoresistive Polymer‐Composites Based on Polycarbonate and Polylactic Acid for Deformation Sensing Applications

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