3D direct-write printing of water soluble micromoulds for high-resolution rapid prototyping

Aabith, Saja; Caulfield, Richard; Akhlaghi, Omid; Papadopoulou, Anastasia; Homer‐Vanniasinkam, Shervanthi; Tiwari, Manish K.

doi:10.1016/j.addma.2022.103019

Cited by 6 publications

(5 citation statements)

References 44 publications

(48 reference statements)

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“…BaTiO 3 piezoelectric nanoparticles were uniformly distributed in the PDMS matrix without agglomeration (Figure a). It is worth noting that DIW technology extrudes paste-like inks with shear-thinning properties, , and these inks can be smoothly extruded from nozzles in a layer-by-layer approach and have a self-supporting ability to retain their shape after extrusion. The cross-sectional morphology of the 3D-printed BaTiO 3 /PDMS piezocomposite is shown in Figure b.…”

Section: Resultsmentioning

confidence: 99%

3D Printing of Flexible BaTiO₃/Polydimethylsiloxane Piezocomposite with Aligned Particles for Enhanced Energy Harvesting

Wei,

Xu,

Wang

et al. 2024

ACS Appl. Mater. Interfaces

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With the rapid development of human−machine interactions and artificial intelligence, the demand for wearable electronic devices is increasing uncontrollably all over the world; however, an unsustainable power supply for such sensors continues to restrict their applications. In the present work, piezoelectric barium titanate (BaTiO 3 ) ceramic powder with excellent properties was prepared from milled precursors through a solid-state reaction. To fabricate a flexible device, the as-prepared BaTiO 3 powder was mixed with polydimethylsiloxane (PDMS) polymer. The BaTiO 3 /PDMS ink with excellent rheological properties was extruded smoothly by direct ink writing technology (DIW). BaTiO 3 particles were aligned due to the shear stress effect during the printing process. Subsequently, the asprinted composite was assembled into a sandwich-type device for effective energy harvesting. It was observed that the maximum output voltage and current of this device reached 68 V and 720 nA, respectively, for a BaTiO 3 content of 6 vol %. Therefore, the material extrusion-based three-dimensional (3D) printing technique can be used to prepare flexible piezoelectric composites for efficient energy harvesting.

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Section: Resultsmentioning

confidence: 99%

3D Printing of Flexible BaTiO₃/Polydimethylsiloxane Piezocomposite with Aligned Particles for Enhanced Energy Harvesting

Wei,

Xu,

Wang

et al. 2024

ACS Appl. Mater. Interfaces

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“…Two examples use axes of polymer concentration and nozzle size to describe optimal printing conditions, albeit without crosslinking. 14,19 Alternative representations in situations with crosslinking polymers include parameters such as flow rates, 15 or measured characteristics like storage modulus. 17 In contrast to polymer solutions, flows of malleable metals and colloidal flows have robust a priori frameworks for describing flow which include thermodynamics.…”

Section: Introductionmentioning

confidence: 99%

“…Highly viscous materials, particularly those which shear thin, may be too viscous to pump at low flow rates. 14–18 Similarly, yield stresses above certain limits impede successful printing. 17 Shear thinning can overcome these challenges and facilitate the pumping of viscous materials.…”

Section: Introductionmentioning

confidence: 99%

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In situ polymer gelation in confined flow controls intermittent dynamics

Smith,

Hashmi

2024

Soft Matter

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“…As a result, AM has become extremely well-known in the industrial sector (Myers et al , 2022; Wanniarachchi et al , 2022). This innovative technique may minimize the time lag while creating a new product by manufacturing a prototype between the new design and the final product (Aabith et al , 2022). Some AM-fabricated components have applications in a variety of industries, including automotive, energy (wind turbine), medical, and aerospace (He et al , 2022; Hou et al , 2022).…”

Section: Introductionmentioning

confidence: 99%

Numerical investigations on mechanical properties of bio-inspired 3D printed geometries using multi-jet fusion process

Chand

Sharma

Trehan

et al. 2023

RPJ

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Purpose The purpose of this study is to find the best geometries among the cylindrical, enamel and honeycomb geometries based upon the mechanical properties (tensile test, compression test and shear test). Further this obtained geometry could be used to fabricate products like exoskeleton and its supporting members. Design/methodology/approach The present research focuses on the mechanical testing of cylindrical, enamel and honeycomb-shaped parts fabricated through multi-jet printing (MJP) process with a wall thickness of 0.26, 0.33, 0.4 and 0.66 mm. The polymer specimens (for tensile, compression and shear tests) were fabricated using a multi-jet fusion process. The experimental results were compared with the numerical modelling. Finally, the optimal geometry was obtained, and the influence of wall thicknesses on various mechanical properties (tensile, compression and shear) was studied. Findings In comparison to cylindrical, enamel structures the honeycomb structures required less time to fabricate and had lower tensile, compressive and shear strengths. The most efficient geometry for fully functional parts where tensile, compressive and shear forces are present during application – cylindrical geometry is preferred followed by enamel, and then honeycomb. It was found that as the wall thickness of various geometries was increased, their ability to withstand tensile, compressive and shear loads also enhanced. The enamel shape structure exhibits greater strain energy storage capacity than other shape structures for compressive loads, and the strength to resist the compressive load will be lower. In the case of cylindrical geometries for tensile loading, the resisting area toward the loading will be higher in comparison to honeycomb- and enamel-based structures. At the same time, the ability to store the stain energy is less. The results of the tensile, compression and shear load finite element analysis using ANSYS are in agreement with those of the experiments. Originality/value From the insight of literature review, it is found that a wide range of work is done on fused deposition modeling (FDM) process. But in comparison to FDM, the MJP provide the better dimensional accuracy and surface properties (Lee et al., 2020). Therefore, it is observed that past research works not incorporated the effect of wall thickness of the embedded geometries on mechanical properties of the part fabricated on MJP (Gibson, n.d.). Hence, in this work, effect of wall thickness on tensile, compression and shear strength is considered as the main factor for the honeycomb, enamel and cylindrical geometries.

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3D direct-write printing of water soluble micromoulds for high-resolution rapid prototyping

Cited by 6 publications

References 44 publications

3D Printing of Flexible BaTiO₃/Polydimethylsiloxane Piezocomposite with Aligned Particles for Enhanced Energy Harvesting

3D Printing of Flexible BaTiO₃/Polydimethylsiloxane Piezocomposite with Aligned Particles for Enhanced Energy Harvesting

In situ polymer gelation in confined flow controls intermittent dynamics

Numerical investigations on mechanical properties of bio-inspired 3D printed geometries using multi-jet fusion process

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3D direct-write printing of water soluble micromoulds for high-resolution rapid prototyping

Cited by 6 publications

References 44 publications

3D Printing of Flexible BaTiO3/Polydimethylsiloxane Piezocomposite with Aligned Particles for Enhanced Energy Harvesting

3D Printing of Flexible BaTiO3/Polydimethylsiloxane Piezocomposite with Aligned Particles for Enhanced Energy Harvesting

In situ polymer gelation in confined flow controls intermittent dynamics

Numerical investigations on mechanical properties of bio-inspired 3D printed geometries using multi-jet fusion process

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Product

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3D Printing of Flexible BaTiO₃/Polydimethylsiloxane Piezocomposite with Aligned Particles for Enhanced Energy Harvesting

3D Printing of Flexible BaTiO₃/Polydimethylsiloxane Piezocomposite with Aligned Particles for Enhanced Energy Harvesting