Beyond the concepts of nanocomposite and 3D printing: PVA and nanodiamonds for layer-by-layer additive manufacturing

Angjellari, Mariglen; Tamburri, Emanuela; Montaina, Luca; Natali, M.; Passeri, Daniele; Rossi, M.; Terranova, Maria Letizia

doi:10.1016/j.matdes.2017.01.051

Cited by 60 publications

(35 citation statements)

References 44 publications

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“…The reason could be of dual nature. Certainly, on the one side, as reported in [30], there are a lot of main factors influencing the quality of the final printed objects such as the parameters setting concerning the extrusion temperature and its speed, the platform temperature, the infill percentage, the printing direction and more generally, the need to adapt the physical-chemical characteristics of the filaments to the specific features of the printer. On the other hand, in the filaments, as they were produced through an extruder, there could be a sort of preferential direction for the nanoparticles which favor the percolation network; thus, improving their electrical conductivity, as pointed above.…”

Section: Electrical Propertiesmentioning

confidence: 99%

Effects of Filament Extrusion, 3D Printing and Hot-Pressing on Electrical and Tensile Properties of Poly(Lactic) Acid Composites Filled with Carbon Nanotubes and Graphene

et al. 2019

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In this study, the effects of three processing stages: filament extrusion, 3D printing (FDM), and hot-pressing are investigated on electrical conductivity and tensile mechanical properties of poly(lactic) acid (PLA) composites filled with 6 wt.% of multiwall carbon nanotubes(MWCNTs), graphene nanoplatelets (GNPs), and combined fillers. The filaments show several decades’ higher electrical conductivity and 50–150% higher values of tensile characteristics, compared to the 3D printed and the hot-pressed samples due to the preferential orientation of nanoparticles during filament extrusion. Similar tensile properties and slightly higher electrical conductivity are found for the hot-pressed compared to the 3D printed samples, due to the reduction of interparticle distances, and consequently, the reduced tunneling resistances in the percolated network by hot pressing. Three structural types are observed in nanocomposite filaments depending on the distribution and interactions of fillers, such as segregated network, homogeneous network, and aggregated structure. The type of structural organization of MWCNTs, GNPs, and combined fillers in the matrix polymer is found determinant for the electrical and tensile properties. The crystallinity of the 3D printed samples is higher compared to the filament and hot-pressed samples, but this structural feature has a slight effect on the electrical and tensile properties. The results help in understanding the influence of processing on the properties of the final products based on PLA composites.

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Section: Electrical Propertiesmentioning

confidence: 99%

Effects of Filament Extrusion, 3D Printing and Hot-Pressing on Electrical and Tensile Properties of Poly(Lactic) Acid Composites Filled with Carbon Nanotubes and Graphene

et al. 2019

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“…Thermal conductivity, thermal and chemical stability, low electrical conductivity, and mechanical properties (abrasiveness and hardness) are just a few of the several properties of nanodiamonds . Moreover, the coupling of this nanomaterial with other chemical species ranging from metallic to polymeric ones has led to the production of hybrid systems in which the characteristics of the single components synergistically interact to produce new advanced multifunctional materials . In this context, the application of DND on paper materials has been proved to be effective in paper preservation and conservation .…”

Section: Introductionmentioning

confidence: 99%

Nanodiamond‐Based Separators for Supercapacitors Realized on Paper Substrates

et al. 2020

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In response to the request for sustainable high performance energy storage devices, a significant interest is focused on developing environmentally friendly supercapacitors. In this context, cellulose‐based substrates for energy storage devices can be well‐engineered, lightweight, safe, thin, and flexible. Herein, a scalable, low‐cost, and easy‐to‐process approach for the preparation of supercapacitors using large area techniques like spray and blade coating is presented. Following a green strategy, all components are chosen or formulated in water‐based dispersions. Symmetric supercapacitors using common copy paper and electronic paper as the substrate, and poly(3,4‐ethylenedioxythiophene)‐poly(styrenesulfonate) (PEDOT:PSS) as electrodes, are realized and investigated. The novelty of this work consists of the use of composites based on detonation nanodiamonds (DNDs) and hydroxypropyl cellulose (HPC) as a solid‐state electrolyte and separator. Devices with solution electrolyte using the same HPC + DND composite but with the addition of sodium sulfate are prepared. The performance obtained using solid electrolyte (HPC + DNDs) and liquid electrolyte (HPC + DNDs + Na2SO4) on both substrates is comparable in terms of specific capacitance: ≈0.13 – 0.52 F g−1 for (HPC + DNDs) and ≈0.35 – 0.82 F g−1 for (HPC + DNDs + Na2SO4), with power density in the range of ≈19 – 24 μW cm−2.

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“…In addition, the packing materials must have proper mechanical properties to ensure their durability and longevity. [13][14][15] To date, various polymeric materials have been used as 3D printing source materials, including poly(vinyl alcohol), [16] poly(ethylene glycol), [17] polycarbonate, [18,19] acrylonitrile butadiene styrene (ABS), [20] poly(ε-caprolactone) (PCL), [21] and poly(lactic acid) (PLA). [22,23] Among them, natural polymers have attracted considerable attention as promising 3D printing source materials owing to their beneficial properties, such as their biocompatibility, biodegradability, and favorable processability.…”

Section: Introductionmentioning

confidence: 99%

3D‐printed polymer packing structures: Uniformity of morphology and mechanical properties via microprocessing conditions

Kim

Korolovych

Muhlbauer

et al. 2020

J of Applied Polymer Sci

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Three‐dimensional (3D) printing is an attractive approach to fabricate highly porous extremely lightweight structures for architecture antivibrational packaging. We report 3D printing processing of model packaging structures using biodegradable poly(lactic acid) (PLA) as a source material, with acrylonitrile butadiene styrene (ABS) utilized as a common 3D printing source material as a traditional benchmarked material. The effects of printing temperature, speed, and layer morphology on the layer‐by‐layer 3D‐printed structures and their mechanical properties were considered. Three different characteristic morphologies were identified based on printing temperature; the microscopic surface roughness was dependent on the printing speed and layer height. We demonstrate that the mechanical performances and surface properties of 3D‐printed PLA structures could be improved by optimization of printing conditions. Specifically, we evaluate that these PLA‐based 3D structures printed exhibited better surface qualities and enhanced mechanical performance than traditional ABS‐based structures. Results showed that the PLA‐based 3D structures possessed the favorable mechanical performance with 34% higher Young's modulus and 23% higher tensile strength in comparison to the ABS‐based 3D structures. This study provides guidelines for achieving high‐quality 3D‐printed lightweight structures, including smooth surfaces and durable mechanical properties, and serves as a framework to create biodegradable 3D‐printed parts for human use.

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Beyond the concepts of nanocomposite and 3D printing: PVA and nanodiamonds for layer-by-layer additive manufacturing

Cited by 60 publications

References 44 publications

Effects of Filament Extrusion, 3D Printing and Hot-Pressing on Electrical and Tensile Properties of Poly(Lactic) Acid Composites Filled with Carbon Nanotubes and Graphene

Effects of Filament Extrusion, 3D Printing and Hot-Pressing on Electrical and Tensile Properties of Poly(Lactic) Acid Composites Filled with Carbon Nanotubes and Graphene

Nanodiamond‐Based Separators for Supercapacitors Realized on Paper Substrates

3D‐printed polymer packing structures: Uniformity of morphology and mechanical properties via microprocessing conditions

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