Mechanical and functional properties of polyamide/graphene nanocomposite prepared by chemicals free-approach and selective laser sintering

Meng, Qingshi; Song, Xianfeng; Han, Sensen; Abbassi, Fethi; Zhou, Zhiqiang; Wu, Bin; Wang, Xiangming; Araby, Sherif

doi:10.1016/j.coco.2022.101396

Cited by 35 publications

(12 citation statements)

References 36 publications

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“…The values of the electrical conductivity for the obtained composites are consistent with the literature data. For example, for composites based on polyamide and graphene 26 the authors achieved 10 −2 S/m for 1 wt% graphene filling. Another research group prepared composites based on polyamide 12 and carbon black.…”

Section: Discussionmentioning

confidence: 99%

Powders of rGO-coated polyamide with special electrical properties for SLS 3D printing

Torkunov

Shiyanova

Verkhova

et al. 2023

Journal of Composite Materials

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Developing new polymer composites with special properties for 3D printing is one of the most attractive tasks. In our study, we have developed new polymer powders based on rGO-coated polyamide suitable for Selective Laser Sintering (SLS) printing. The obtained materials were characterized using optical microscopy, UV-Vis spectroscopy, scanning electron microscopy and dielectric spectroscopy. The size distribution of the powder particles, the angle of rest after an avalanche, the compactibility (Hausner ratio), the optical properties (absorption and transmission) of the powder monolayer, and the electrical conductivity of the obtained materials have been studied. It has been shown that the developed powders are suitable for the use in the framework of the SLS method, and can be applied to remove static electricity, as well as in reflective screens for electromagnetic radiation.

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Section: Discussionmentioning

confidence: 99%

Powders of rGO-coated polyamide with special electrical properties for SLS 3D printing

Torkunov

Shiyanova

Verkhova

et al. 2023

Journal of Composite Materials

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“…In addition, the polystyrene composite showed promising inhibition for bacterial growth exhibited . Nanomaterials proved to be an effective approach for enhancing the physical properties (such as thermal and electrical conductivity) and mechanical performance of polymeric materials at low-volume fractions. − Recently, they are also investigated as FRs for polymers in conjunction with traditional FRs where synergistic effect between the two additives was often reported. − Most of the traditional FRs work in the gas phase, while nanomaterials suppress the flammability of a polymer in the solid phase. Both additives (traditional FRs and nanomaterial-based FRs) complement each other leading to high flame retardancy and simultaneously high mechanical performance .…”

Section: Introductionmentioning

confidence: 99%

Supramolecular-Wrapped α-Zirconium Phosphate Nanohybrid for Fire Safety and Reduced Toxic Emissions of Thermoplastic Polyurethane

Han,

Li,

et al. 2024

ACS Appl. Polym. Mater.

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In the current study, a facile approach is introduced to enhance the flame retardancy of thermoplastic polyurethane (TPU) using a supramolecular-wrapped α-zirconium phosphate nanohybrid (CPP@ZrP). The CPP@ZrP nanohybrid was successfully synthesized by enveloping a phytic acid-doped polypyrrole shell and linking it to cobalt ions via the multivalent anions of phytic acid. The CPP@ZrP nanohybrid exhibited relatively uniform dispersion within the TPU matrix, leading to strong interface between TPU and CPP@ZrP and hence high mechanical and flame-retarding properties. The strength of TPU increased by 37% with 850% elongation at break at 5.0 wt % CPP@ZrP. Similarly, adding CPP@ZrP into TPU substantially reduced the peak heat release rate by 41.8%, peak smoke production rate by 25.8%, and total CO production by 32.9%. The average effective heat of combustion from the TPU/CPP@ZrP composite was reduced by 25% which confirms the reduction in flammable volatile substances. The experimental measurements and morphology of char residuals reveal that the CPP@ZrP nanohybrid reduces the flame retardancy of TPU in the gas and condensed phases via reacting with the flammable volatiles and preventing heat transfer to the flames. The study introduces a facile approach to designing a metallic-organic–inorganic hybrid flame retardant, CPP@ZrP, with high efficacy in reducing fire risks and mitigating smoke toxicity in polymers.

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“…Production of end products via SLS shows capability for most industrial applications [8], whereby Rollo G. et al, demonstrated the successful fabrication of porous 3D conductive structures by SLS using TPU powder wrapped with multi-walled carbon nanotubes and graphene nanofillers [9]. Additionally, Meng et al, produced electrically conductive and strong graphene-polyamide structures by SLS of graphene-platelet coated PA particles, with the percolation threshold observed at 0.2-1.0 wt.% graphene platelets [10]. In this investigation, the behavior and properties of the new composite material are explored, with initial findings indicating promising two-point resistance values <10 kΩ/sq following laserassisted processing.…”

Section: Introductionmentioning

confidence: 99%

Electrically conductive polymer-graphene composite material for selective laser sintering additive manufacturing

Bond,

Andersson,

Ortegren

et al. 2024

Laser-Based Micro- And Nanoprocessing XVIII

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Additive manufacturing is rapidly growing, where selective laser sintering technology dominates for industrial use. In the case of polymer selective laser sintering, polyamide is the standard material. However, polyamide is an electrical insulator, and for specific applications, it would be desirable to be able to manufacture polymer-based electrically conductive parts. Electromagnetic Compatibility is one of the most significant targeted applications, where the introduction of electric vehicles raises new electromagnetic compatibility demands. The goal is, therefore, to develop an electrically conductive composite material for selective laser sintering using graphene as the additive. Composites are prepared by mixing polyamide, graphene, and additives with varying graphene/polyamide ratios. The aim of this investigation is the laserassisted processing of the resulting graphene/polyamide composites with various parameters to sinter the material, forming a solid conductive structure. The structure is characterized using SEM and resistance measurements. Results show sheet resistance values of about 700Ω/sq after laser-assisted processing with good powder flowability.

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Mechanical and functional properties of polyamide/graphene nanocomposite prepared by chemicals free-approach and selective laser sintering

Cited by 35 publications

References 36 publications

Powders of rGO-coated polyamide with special electrical properties for SLS 3D printing

Powders of rGO-coated polyamide with special electrical properties for SLS 3D printing

Supramolecular-Wrapped α-Zirconium Phosphate Nanohybrid for Fire Safety and Reduced Toxic Emissions of Thermoplastic Polyurethane

Electrically conductive polymer-graphene composite material for selective laser sintering additive manufacturing

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