A novel method and printhead for 3D printing combined nano-/microfiber solid structures

Kara, Yahya; Kovács, Norbert Krisztián; Nagy-György, Péter; Boros, Róbert; Molnár, Kolos

doi:10.1016/j.addma.2022.103315

Cited by 10 publications

(4 citation statements)

References 49 publications

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“…Polymers 2024, 16, 1424 2 of 13 A new extrusion additive prototyping technique is proposed in [32]. It allows for the creation of hierarchical systems (consisting of porous layers of nano-/microfibers) using a modernized fused filament fabrication (FFF) 3D-printer printhead in (a) filament-welding or (b) fiber-generation modes.…”

Section: Introductionmentioning

confidence: 99%

The Air Permeability and the Porosity of Polymer Materials Based on 3D-Printed Hybrid Non-Woven Needle-Punched Fabrics

Nazarov,

Dedov,

Doronin

et al. 2024

Polymers

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The possibility of controlling the porosity and, as a result, the permeability of fibrous non-woven fabrics was studied. Modification of experimental samples was performed on equipment with adjustable heating and compression. It was found that the modification regimes affected the formation of the porous structure. We found that there was a relationship between the permeability coefficient and the porosity coefficient of the materials when the modification speed and temperature were varied. A model is proposed for predicting the permeability for modified material with a given porosity. As the result, a new hybrid composite material with reversible dynamic color characteristics that changed under the influence of ultraviolet and/or thermal exposure was produced. The developed technology consists of: manufacture of the non-woven needle-punched fabrics, surface structuring, material extrusion, additive manufacturing (FFF technology) and the stencil technique of ink-layer adding. In our investigation, we (a) obtained fibrous polymer materials with a porosity gradient in thickness, (b) determined the dependence of the material’s porosity coefficient on the speed and temperature of the modification and (c) developed a model for calculating the porosity coefficient of the materials with specified technological parameters.

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Section: Introductionmentioning

confidence: 99%

The Air Permeability and the Porosity of Polymer Materials Based on 3D-Printed Hybrid Non-Woven Needle-Punched Fabrics

Nazarov,

Dedov,

Doronin

et al. 2024

Polymers

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“…Yahya Kara presented a new method for preparing nano/microfibers by combining extrusion and melt blowing. The distribution of air velocity and the effect of wind speed on fiber diameter were simulated [ 29 ]. López-Herrera made an electrohydrodynamic axisymmetric model of coaxial electrosprays in 2020.…”

Section: Introductionmentioning

confidence: 99%

Deposition of Uniform Nanoscale Patterns on Silicon Dioxide Based on Coaxial Jet Direct Writing

Shi,

Abbas,

Zhao

et al. 2023

Polymers

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To increase the printing stability of low-viscosity solutions, an auxiliary method was proposed using a coaxial electrohydrodynamic jet. A high-viscosity solution was employed as the outer layer in the printing process, and it could be removed (dissolved away) after printing the structures. A combination of mechanical and electrical forces was proposed to enhance the consistency, durability, and alignment of the printed versatile structures. The instability of the jet trajectory (which arose from the repulsion between the jet and the base with a residual charge, in addition to the winding effect of the solution) was also reduced using the drag force along the direction of movement. Moreover, the jet velocity, the surface charge, and the influence of various working voltages on the jet speed were simulated. An array of IDT-BT nanostructures measuring about 100 nm was prepared on silicon dioxide (using an inner needle with a diameter of 130 µm) by equating the moving speed (350 mm/s) of the substrate to the speed of the jet. Moreover, the moving speed (350 mm/s) of the substrate was compared exclusively to the speed of the jet. The method proposed throughout this study can provide a reference for enhancing the stability of low-viscosity solutions on substrates for high-efficiency fabrication devices (NEMS/MEMS).

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“…Three-dimensional printing, also known as additive manufacturing (AM), involves the construction of three-dimensional objects from digital models by depositing, connecting, or solidifying material under computer control [1][2][3]. Unlike traditional manufacturing methods that involve material removal, 3D printing builds objects by layering materials [4][5][6][7]. The printing process involved dual extrusion and fused filament fabrication techniques.…”

Section: Introductionmentioning

confidence: 99%

Optimizing Layer Thickness and Width for Fused Filament Fabrication of Polyvinyl Alcohol in Three-Dimensional Printing and Support Structures

Moradi,

Karamimoghadam,

Meiabadi

et al. 2023

Machines

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Polyvinyl Alcohol (PVA) is frequently applied as a support material in 3D printing, especially in the crafting of intricate designs and projecting elements. It functions as a water-soluble filament, often paired with materials like ABS or PLA. PVA serves as a momentary scaffold, supporting the jutting segments of a 3D model throughout the printing process. Subsequent to printing, the primary component can be effortlessly isolated by dissolving the PVA support using water. PVA, being a pliable and eco-friendly polymer, is susceptible to moisture. Its aqueous solubility renders it a prime selection for bolstering 3D print structures. In this investigation, equivalent-sized samples were 3D printed utilizing an Ultimaker 3D printer to assess the potency of PVA-generated specimens. Tensile examinations were executed on each sample employing a testing apparatus. The durability of the specimens was notably impacted by the input parameters, specifically the stratum width and stratum thickness. Strength dwindled as stratum width increased, whereas it rose with augmented stratum thickness. A few specimens with heightened stratum width and compromised quality displayed subpar performance during the tensile assessment. The findings unveiled a peak tensile strength of 17.515 MPa and a maximum load of 1600 N. Attaining an optimal degree of material utilization led to a decrease in filament consumption by 8.87 g, all the while upholding a MTS (maximum tensile strength) of 10.078 MPa.

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A novel method and printhead for 3D printing combined nano-/microfiber solid structures

Cited by 10 publications

References 49 publications

The Air Permeability and the Porosity of Polymer Materials Based on 3D-Printed Hybrid Non-Woven Needle-Punched Fabrics

The Air Permeability and the Porosity of Polymer Materials Based on 3D-Printed Hybrid Non-Woven Needle-Punched Fabrics

Deposition of Uniform Nanoscale Patterns on Silicon Dioxide Based on Coaxial Jet Direct Writing

Optimizing Layer Thickness and Width for Fused Filament Fabrication of Polyvinyl Alcohol in Three-Dimensional Printing and Support Structures

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