3D printing of clay for decorative architectural applications: Effect of solids volume fraction on rheology and printability

Chan, Shareen S. L.; Pennings, Ryan; Edwards, Lewis; Franks, George V.

doi:10.1016/j.addma.2020.101335

Cited by 63 publications

(64 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Solid symbols depict inks which could print lattices with distinguishable filaments and voids, while hollow symbols depict inks which printed filaments that slump and lose CAD‐designed voids. Circles are data from this work on alumina emulsions, while squares are data on traditional throwing clay and water pastes 34 . The diagonal dashed line indicates a possible printability boundary separating printable from unprintable inks, as per Equation ().…”

Section: Resultsmentioning

confidence: 99%

“…We hypothesize that the product of storage modulus and yield stress must exceed a critical value to avoid slumping as indicated by the diagonal dashed line in Figure 4A. In our earlier work on clay paste printing 34 we proposed that the relationship can be expressed as follows:

G^{'} = \frac{C_{1}}{τ_{y}},

where C 1 is a constant. In this work, we can further refine C 1 to be approximately 5 × 10 6 as per the linear discriminant function which placed 91.8% of observations in the right groups.…”

Section: Discussionmentioning

confidence: 99%

“…Circles are data from this work on alumina emulsions, while squares are data on traditional throwing clay and water pastes. 34 The diagonal dashed line indicates a possible printability boundary separating printable from unprintable inks, as per Equation (3). B, Gʹ recovered after 15 s from the end of a high shear stress interval plotted against the product of Gʹ and τ y .…”

Section: Effect Of Rheology On Printabilitymentioning

confidence: 99%

Section: Effect Of Rheology On Printabilitymentioning

confidence: 99%

“…In this work, we can further refine C 1 to be approximately 5 × 10 6 as per the linear discriminant function which placed 91.8% of observations in the right groups. Additionally, when compared with a different ceramic system-throwing clay composition with water (without oil and other additives) 34 -our printability criterion is also equally applicable. This shows its promise as a comprehensive criterion that is potentially applicable across many ceramic DIW paste systems.…”

Section: Effect Of Rheology On Printabilitymentioning

confidence: 99%

See 4 more Smart Citations

Direct ink writing of hierarchical porous alumina‐stabilized emulsions: Rheology and printability

2020

Self Cite

View full text Add to dashboard Cite

Bio‐inspired multi‐scaled (hierarchical) porous structures have remarkable strength and stiffness‐to‐density properties. Direct ink writing (DIW) or robocasting, an additive manufacturing (or also commonly known as 3D printing) material extrusion technique is able to create near‐net‐shaped complex geometries. A new approach of combining DIW, colloidal particle‐stabilized emulsion paste inks and partial densification to create tailored architectures of hierarchical porosity on three scales has been demonstrated. The printed and sintered ceramic lattice structures possess relatively high overall porosity of 78.7% (on average), comprising mainly (64.7%) open porosity. The effects of formulation (surfactant and oil concentrations, solids particle size, and mixing speed) on rheology and pore size and morphology have been investigated. The rheological properties (storage modulus, yield stress, and recovery of storage modulus) of the emulsions have been found to delineate the samples with good shape retention from those that slump. Additionally, the internal features of the sintered structures have been analyzed via X‐ray tomography and scanning electron microscope. The role of emulsion stability on printability and the internal structure of the prints has been investigated.

show abstract

Section: Resultsmentioning

confidence: 99%

G^{'} = \frac{C_{1}}{τ_{y}},

where C 1 is a constant. In this work, we can further refine C 1 to be approximately 5 × 10 6 as per the linear discriminant function which placed 91.8% of observations in the right groups.…”

Section: Discussionmentioning

confidence: 99%

Section: Effect Of Rheology On Printabilitymentioning

confidence: 99%

Section: Effect Of Rheology On Printabilitymentioning

confidence: 99%

Section: Effect Of Rheology On Printabilitymentioning

confidence: 99%

See 3 more Smart Citations

Direct ink writing of hierarchical porous alumina‐stabilized emulsions: Rheology and printability

2020

Self Cite

View full text Add to dashboard Cite

show abstract

Substrate‐Versatile Direct‐Write Printing of Carbon Nanotube‐Based Flexible Conductors, Circuits, and Sensors

Owens

Headrick

Williams

et al. 2021

Adv Funct Materials

View full text Add to dashboard Cite

Manufacturing of printed electronics relies on the deposition of conductive liquid inks, typically onto polymeric or paper substrates. Among available conductive fillers for use in electronic inks, carbon nanotubes (CNTs) have high conductivity, low density, processability at low temperatures, and intrinsic mechanical flexibility. However, the electrical conductivity of printed CNT structures has been limited by CNT quality and concentration, and by the need for nonconductive modifiers to make the ink stable and extrudable. This study introduces a polymer-free, printable aqueous CNT ink, and, via an ambient direct-write printing process, presents the relationships between printing resolution, ink rheology, and ink-substrate interactions. A model is constructed to predict printed feature sizes on impermeable substrates based on Wenzel wetting. Printed lines have conductivity up to 10 000 S m −1 . The lines are flexible, with <5% change in DC resistance after 1000 bending cycles, and <3% change in DC resistance with a bending radius down to 1 mm. Demonstrations focus on i) conformality, via printing CNTs onto stickers that can be applied to curved surfaces, ii) interactivity using a CNT-based button printed onto folded paper structure, and iii) capacitive sensing of liquid wicking into the substrate itself. Facile integration of surface mount components on printed circuits is enabled by the intrinsic adhesion of the wet ink.

show abstract

Novel‐Ink‐Based Direct Ink Writing of Ti6Al4V Scaffolds with Sub‐300 µm Structural Pores for Superior Cell Proliferation and Differentiation

Xu,

Chen

et al. 2024

Adv Healthcare Materials

View full text Add to dashboard Cite

Ti6Al4V scaffolds with pore sizes between 300 and 600 μm are deemed suitable for bone tissue engineering. However, a significant proportion of pores in human bones are smaller than 300 μm, playing a crucial role in cell proliferation, differentiation, and bone regeneration. Ti6Al4V scaffolds with these small‐sized pores have not been successfully fabricated, and their cytocompatibility remains unknown. The paper presents a novel ink formula specifically tailored for the fabrication of Ti6Al4V scaffolds featuring precise and unobstructed sub‐300 μm structural pores, achieved by investigating the rheological properties and printability of five inks containing 60–77.5 vol.% Ti6Al4V powders and PS/DCM/NMP binders. Ti6Al4V scaffolds with 50 μm to 600 μm pores are fabricated via direct ink writing and subsequently subjected to in vitro MC3T3‐E1 and BMSCs experiments. The live/dead assay, FITC‐ phalloidin/DAPI staining, and CCK‐8 assay indicate that the 100 μm pore‐sized scaffolds exhibit the highest cell adhesion and proliferation capacity. The alizarin red staining, RT‐qPCR assay, and immunocytochemical staining demonstrate the superior osteogenic differentiation potential of 100 μm and 200 μm pore‐sized scaffolds. The study highlights the importance of sub‐300 μm structural pores and redefines the optimal pore size for Ti6Al4V scaffolds, advancing the development of bone tissue engineering and clinical medicine.This article is protected by copyright. All rights reserved

show abstract

3D printing of clay for decorative architectural applications: Effect of solids volume fraction on rheology and printability

Cited by 63 publications

References 29 publications

Direct ink writing of hierarchical porous alumina‐stabilized emulsions: Rheology and printability

Direct ink writing of hierarchical porous alumina‐stabilized emulsions: Rheology and printability

Substrate‐Versatile Direct‐Write Printing of Carbon Nanotube‐Based Flexible Conductors, Circuits, and Sensors

Novel‐Ink‐Based Direct Ink Writing of Ti6Al4V Scaffolds with Sub‐300 µm Structural Pores for Superior Cell Proliferation and Differentiation

Contact Info

Product

Resources

About