Shaping Radiation Curable Colloidal Dispersions – From Polymer/Ceramic Fibers and Microspheres to Gradient Porosity Ceramic Bulk Materials

Hazan, Yoram de; Wozniak, Maciek; Heinecke, Judit; Müller, Gregor; Märkl, Veronika; Graule, Thomas

doi:10.1002/9780470944066.ch8

Cited by 2 publications

(3 citation statements)

References 24 publications

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“…Moreover, pastes of inorganic particles such as metals like titanium and ceramics like calcium phosphates, silicates, and metal oxides can be printed together with polymer binders to produce green parts, which are sintered after burning off the polymer binders in postprocessing. 532 …”

Section: D Materials Extrusionmentioning

confidence: 99%

“…A broad range of build materials can be used including acrylic dispersions, solutions of linear and highly branched polymers including cellulose, starch, chitosan, and polyelectrolytes, as well as water-soluble polymers and inorganic sols based on silicates and bentonites. Moreover, pastes of inorganic particles such as metals like titanium and ceramics like calcium phosphates, silicates, and metal oxides can be printed together with polymer binders to produce green parts, which are sintered after burning off the polymer binders in postprocessing …”

Section: D Materials Extrusionmentioning

confidence: 99%

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Polymers for 3D Printing and Customized Additive Manufacturing

Ligon

Liska²,

Stampfl³

et al. 2017

Chem. Rev.

2,844

2,191

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Additive manufacturing (AM) alias 3D printing translates computer-aided design (CAD) virtual 3D models into physical objects. By digital slicing of CAD, 3D scan, or tomography data, AM builds objects layer by layer without the need for molds or machining. AM enables decentralized fabrication of customized objects on demand by exploiting digital information storage and retrieval via the Internet. The ongoing transition from rapid prototyping to rapid manufacturing prompts new challenges for mechanical engineers and materials scientists alike. Because polymers are by far the most utilized class of materials for AM, this Review focuses on polymer processing and the development of polymers and advanced polymer systems specifically for AM. AM techniques covered include vat photopolymerization (stereolithography), powder bed fusion (SLS), material and binder jetting (inkjet and aerosol 3D printing), sheet lamination (LOM), extrusion (FDM, 3D dispensing, 3D fiber deposition, and 3D plotting), and 3D bioprinting. The range of polymers used in AM encompasses thermoplastics, thermosets, elastomers, hydrogels, functional polymers, polymer blends, composites, and biological systems. Aspects of polymer design, additives, and processing parameters as they relate to enhancing build speed and improving accuracy, functionality, surface finish, stability, mechanical properties, and porosity are addressed. Selected applications demonstrate how polymer-based AM is being exploited in lightweight engineering, architecture, food processing, optics, energy technology, dentistry, drug delivery, and personalized medicine. Unparalleled by metals and ceramics, polymer-based AM plays a key role in the emerging AM of advanced multifunctional and multimaterial systems including living biological systems as well as life-like synthetic systems.

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Section: D Materials Extrusionmentioning

confidence: 99%

Section: D Materials Extrusionmentioning

confidence: 99%

Polymers for 3D Printing and Customized Additive Manufacturing

Ligon

Liska²,

Stampfl³

et al. 2017

Chem. Rev.

2,844

2,191

View full text Add to dashboard Cite

show abstract

“…Such direct imprinting effects of the medium may be more noticeable for FPC fluid V due to its lower solid content (higher final porosity) and lower viscosity. 50 (4) Ag-TiO 2 /Polyacrylate Nanocomposite FPC The co-processing and shaping of soluble metal salts and colloidal particles are complicated by the fact that colloidal stability is often difficult to achieve in such high ionic-strength systems. The use of sterically stabilized colloidal particles with comb-polyelectrolyte surfactants in aqueous systems is advantageous.…”

Section: )] and The Cross-section [Figs 3(a) And (B)mentioning

confidence: 99%

Porous Ceramics, Ceramic/Polymer, and Metal‐Doped Ceramic/Polymer Nanocomposites via Freeze Casting of Photo‐Curable Colloidal Fluids

Hazan

2011

J. Am. Ceram. Soc.

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A novel and general process for the fabrication of porous ceramics and metal/ceramic/polymer nanocomposites by freeze‐photocuring‐casting (FPC) is presented. The homogenous fluid containing water, curable monomers, and colloidal particles is frozen, and the phase separated microstructure is fixed by photo‐initiated polymerization. At the relatively high resin/particle ratio explored here, the structure is sufficiently strong to withstand the capillary forces during ambient drying; however, it is capable of transforming to macroscopic ceramics such as Al2O3 and SiO2 by conventional debinding and sintering. The use of FPC fluids enables producing porous macroscopic shapes such as microspheres, films, and multilayer coatings having an ordered, interconnected pore network and pore sizes down to the low sub‐micrometer range. The pore structure is found to be dependent on the radius of curvature of the macroscopic structure. Ag–TiO2/polyacrylate porous nanocomposites are produced by co‐shaping of FPC containing sterically stable colloids, soluble metal salts, and monomers. Ag nanoparticles form in situ by reduction of Ag+ ions on the TiO2 surface. This triggers the photo‐polymerization of the resin without the need of a photoinitiator. It is found that if the cured layers in a multilayer stack are frozen before the newly deposited layer, the ice crystal structure formed is linked via epitaxial growth.

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Shaping Radiation Curable Colloidal Dispersions – From Polymer/Ceramic Fibers and Microspheres to Gradient Porosity Ceramic Bulk Materials

Cited by 2 publications

References 24 publications

Polymers for 3D Printing and Customized Additive Manufacturing

Polymers for 3D Printing and Customized Additive Manufacturing

Porous Ceramics, Ceramic/Polymer, and Metal‐Doped Ceramic/Polymer Nanocomposites via Freeze Casting of Photo‐Curable Colloidal Fluids

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