3D printable ceramic pastes design: Correlating rheology &amp; printability

Bonilla‐Cruz, José; Ávila-López, Manuel Alejandro; Rodríguez, Francisco Enrique Longoria; Aguilar-Elguézabal, A.; Lara-Ceniceros, Tania E.

doi:10.1016/j.jeurceramsoc.2022.06.029

Cited by 10 publications

(10 citation statements)

References 19 publications

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“…More specifically, we investigated a very basic feature: how to take advantage of the yield stress of the fluid with DIW to dynamically modulate the facies of a single layer. This is in contrast to most research papers that attempt to relate the rheological properties of the YSF to the ability to form a multilayer 3D structure that supports its weight and capillary forces [9][10][11] . Instead, we focus on the 'single layer' object.…”

Section: Introductionmentioning

confidence: 70%

2.5D Printing of a Yield Stress Fluid

COLANGES

TOURVIEILLE

LIDON

et al. 2022

Preprint

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We report on direct ink writing of a model yield stress fluid and focus on the printability of the first layer, the one in contact with the supporting substrate. We observe a diversity of deposition morphologies that depends on a limited set of operational parameters, mainly ink flow rate, substrate speed and writing density, and also on material properties (e.g., yield stress).Among these morphologies, one of them does not depend on fluid properties (as long as it displays some yield stress) and consists of flat films whose thickness is controllable in a significant range (about 0.1-1 mm) and tunable in real time during printing. We thus demonstrate the ability to print films with thickness gradients and prove that the printing fidelity is mainly due to a competition between yield stress and capillarity.

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Section: Introductionmentioning

confidence: 70%

2.5D Printing of a Yield Stress Fluid

COLANGES

TOURVIEILLE

LIDON

et al. 2022

Preprint

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“…The storage modulus ( G ′) value on the LVR is equivalent to the elastic modulus of a solid material, which was G ′ = 13 kPa. Further, the gel point ( G ′ = G ″) was located at 1.4 kPa . Before the gel point, the paste (also named printable ink) can be considered liquid-like and after as solid-like.…”

Section: Resultsmentioning

confidence: 99%

“…Nowadays, additive manufacturing (AM, also known as three-dimensional (3D) printing) is considered a novel emerging field that leads to practical applications in many knowledge fields, such as developing 3D-printable catalysts and photocatalysts. , This innovative technology allows three-dimensional building objects by placing thin layers, one on top of the other (layer-by-layer), following a computer-aided design (CAD) . Among all AM techniques, direct ink writing (DIW) is the simplest, most straightforward, and cost-effective technology to get three-dimensional structures from ceramic pastes or slurries. ,− …”

Section: Introductionmentioning

confidence: 99%

“…3D-printed monoliths based on micro- or nanomaterials have been obtained by DIW using zeolites, alumina (Al 2 O 3 ), silica (SiO 2 ), zirconia (ZrO 2 ), and titania nanoparticles (TiO 2 NPs), , which have been used in numerous applications in chemistry, electrochemistry, analytical chemistry, photocatalyst, catalysis, − and biotechnology, among others. , In particular, water-soluble polymers or small organic molecules (gel precursors) have been widely used as binders of TiO 2 NPs to get 3D-printable thixotropic slurries; nonetheless, these binders typically remain in the three-dimensional structure. − Indeed, the organic material (binders) will be destroyed by the action of the free radicals produced during the photocatalytic reaction since the free radical-based reactions are not selective. Consequently, the 3D-printed structures might collapse owing to the binder degradation.…”

Section: Introductionmentioning

confidence: 99%

“…3 Among all AM techniques, direct ink writing (DIW) is the simplest, most straightforward, and cost-effective technology to get three-dimensional structures from ceramic pastes or slurries. 1,4−6 3D-printed monoliths based on micro-or nanomaterials have been obtained by DIW using zeolites, alumina (Al 2 O 3 ), silica (SiO 2 ), zirconia (ZrO 2 ), and titania nanoparticles (TiO 2 NPs), 2,6 which have been used in numerous applications in chemistry, electrochemistry, analytical chemistry, photocatalyst, catalysis, 7−9 and biotechnology, among others. 5,9 In particular, water-soluble polymers or small organic molecules (gel precursors) have been widely used as binders of TiO 2 NPs to get 3D-printable thixotropic slurries; nonetheless, these binders typically remain in the three-dimensional structure.…”

Section: ■ Introductionmentioning

confidence: 99%

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Photodegradation of Air and Water Contaminants Using 3D-Printed TiO₂ Nanoparticle Scaffolds

Ávila-López¹,

Lara-Ceniceros²,

Rodríguez³

et al. 2022

ACS Appl. Nano Mater.

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A significant challenge in the photocatalysis field is getting selfsupporting three-dimensional (3D)-printable photocatalysts that preserve their photocatalytic activity. Herein, we disclose reusable 3D-printable photocatalysts based on binder-free TiO 2 nanoparticles (3DM-TiO 2 ) under an eco-friendly, affordable, and reliable methodology for the first time. Strong and mechanically stable 3DM-TiO 2 structures (compression strength = 16 MPa) were obtained under soft sintered conditions (∼400 °C), exhibiting an anatase/rutile ratio of 85/ 15% by the Rietveld refinement, a mesoporous structure with a surface area (S BET ) of 45.2 m 2 /g, and outstanding photocatalytic activity. 3DM-TiO 2 successfully demonstrated high recyclability and adaptability in the dust-free photodegradation experiments of emerging contaminants in the liquid phase (triclosan, TCS) and gas phase (liquefied petroleum gas, LPG). A TCS mineralization of ∼95% was obtained at 6 h of photodegradation. The reusability from the 3DM-TiO 2 was assessed during 12 cycles of TCS degradation, recovering its photocatalytic activity by 100% after reactivation at 400 °C. In the gas phase, the maximum conversion of LPG to CO 2 was 95.3% for n-butane, 93.7% for isobutane, and 52.9% for propane after 15 h of photodegradation. All photodegradation experiments were fitted to the Langmuir−Hinshelwood kinetic model. We believe that the technology proposed here could trigger applications of nanomaterial-based photocatalysts, replacing the powdered materials to achieve new reactor designs and process configurations on a large scale.

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Viscoelastic Paste-Based Ceramic vat Photopolymerization: Recent Achievements and Future Developments

Xing,

Liu,

Zhou

et al. 2024

Additive Manufacturing Frontiers

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3D printable ceramic pastes design: Correlating rheology & printability

Cited by 10 publications

References 19 publications

2.5D Printing of a Yield Stress Fluid

2.5D Printing of a Yield Stress Fluid

Photodegradation of Air and Water Contaminants Using 3D-Printed TiO₂ Nanoparticle Scaffolds

Viscoelastic Paste-Based Ceramic vat Photopolymerization: Recent Achievements and Future Developments

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3D printable ceramic pastes design: Correlating rheology & printability

Cited by 10 publications

References 19 publications

2.5D Printing of a Yield Stress Fluid

2.5D Printing of a Yield Stress Fluid

Photodegradation of Air and Water Contaminants Using 3D-Printed TiO2 Nanoparticle Scaffolds

Viscoelastic Paste-Based Ceramic vat Photopolymerization: Recent Achievements and Future Developments

Contact Info

Product

Resources

About

Photodegradation of Air and Water Contaminants Using 3D-Printed TiO₂ Nanoparticle Scaffolds