Additive manufacturing of polymer nanocomposites: Needs and challenges in materials, processes, and applications
TLDR
A comparative review of additive manufacturing processes for polymer composites and their applications is presented in this article, which aims to provide engineers and scientists with an updated understanding of the underlying issues, barriers, limitations, and opportunities.Abstract:
Polymer nanocomposites have attracted increasing interest in research and development with several current and potential industrial applications due to their wide margin of superiority over conventional materials. Polymer composites provide a higher strength-to-weight ratio, easily customizable product properties, flexible manufacturing processes, high resistance to corrosion or erosion, and lower cost. The recent progress in additive manufacturing (AM) methods has paved the way for even a broader range of flexibilities in design and materials in several industrial sectors, including aerospace, biomedical, construction, electronics, telecommunication, mechanical, and defense. However, some hindrances remain in the synthesis of polymer composites and their fabrication through AM technologies. A comparative review of AM processes for polymer composites and their applications is presented in this study. This study aims to provide engineers and scientists with an updated understanding of the underlying issues, barriers, limitations, and opportunities. It will also help the reader to systematically reveal the research problems and future directions related to materials synthesis and AM processes.read more
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Fused Filament Fabrication Process: A Review of Numerical Simulation Techniques.
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References
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Composites based on metallic particles and tuned filling factor for 3D-printing by Fused Deposition Modeling
Ester M. Palmero,Daniel Casaleiz,Javier de Vicente,Juan Hernández-Vicen,Silvia López-Vidal,Emilio Ramiro,Alberto Bollero +6 more
TL;DR: In this paper, a solution casting of homogeneous composites with a tuned amount of gas-atomized metallic particles embedded in polymer was performed for 3D-printing by Fused Deposition Modeling.
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A novel approach via combination of electrospinning and FDM for tri-leaflet heart valve scaffold fabrication
TL;DR: In this paper, a combination method of electrospinning and rapid prototyping (RP) fused deposition modeling (FDM) is proposed for the fabrication of a tissue engineering heart valve (TEHV) scaffold.
Journal ArticleDOI
Effect of recycling on the mechanical behavior and structure of additively manufactured acrylonitrile butadiene styrene (ABS)
TL;DR: In this article, the effect of three rounds of recycling on the stochastic mechanical properties of fused deposition modeled (FDMed) polymers was investigated using Weibull statistics.
Journal ArticleDOI
3D printed biocompatible polylactide-hydroxyapatite based material for bone implants
TL;DR: In many medical applications, there is a strong demand for biocompatible bone implants with complex shape, which can be satisfied by considering the opportunity of using additive manufacturin... as discussed by the authors.
Polyamide Nanocomposites for Selective Laser Sintering
Abstract: Current polyamide 11 and 12 are lacking in fire retardancy and high strength/high heat resistance characteristics for a plethora of finished parts that are desired and required for performance driven applications. It is anticipated that nanomodification of polyamide 11 and 12 will result in enhanced polymer performance, i.e., fire retardancy, high strength and high heat resistance for polyamide 11 and 12. It is expected that these findings will expand the market opportunities for polyamide 11 and 12 resin manufacturers. The objective of this research is to develop improved polyamide 11 and 12 polymers with enhanced flame retardancy, thermal, and mechanical properties for selective laser sintering (SLS) rapid manufacturing (RM). A nanophase was introduced into the polyamide 11 and 12 via twin screw extrusion to provide improved material properties of the polymer blends. Arkema RILSAN® polyamide 11 molding polymer pellets and Degussa VESTAMID® L1670 polyamide 12 were examined with three types of nanoparticles: chemically modified montmorillonite (MMT) organoclays, surface modified nanosilica, and carbon nanofibers (CNFs) to create polyamide 11 and 12 nanocomposites. Wide angle X-ray diffraction (WAXD) and transmission electron microscopy (TEM) were used to determine the degree of dispersion. Injection molded test specimens were fabricated for physical, thermal, mechanical properties, and flammability tests. Thermal stability of these polyamide 11 and 12 nanocomposites was examined by TGA. Mechanical properties such as tensile, flexural, and elongation at break were measured. Flammability properties were also obtained using the Cone Calorimeter at an external heat flux of 50 kW/m. TEM micrographs, physical, mechanical, and flammability properties are included in the paper. Polyamide 11 and 12 nanocomposites properties are compared with polyamide 11 and 12 baseline polymers. Based on flammability and mechanical material performance, selective polymers including polyamide 11 nanocomposites and control polyamide 11 were cryogenically ground into fine powders and fabricated into SLS parts.
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