Porous Ceramics by Photopolymerization with Terpene–Acrylate Vehicles

Tomeckova, Vladislava; Halloran, John W.

doi:10.1111/j.1551-2916.2012.05444.x

Cited by 30 publications

(16 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is worth noting that the D p value obtained for this new biofunctional photocurable resin is nearly halved with respect to typical values found in standard high‐performance commercial SL resins (e.g., RF080 DWS, D p = 0.150 mm, E c = 19.4 mJ cm −2 ), thus prospecting excellent 3D printing resolution. As expected,[23b,24] the D p sensitivity of the GlyDMAB mixture was strongly decreased also with respect to the neat GlyDMA/TPO‐L formulation ( D p = 0.222 ± 0.01 mm), thus confirming the key role played by the visible dye as competitor to the PI in absorbing UV‐photons without resulting in the formation of radical species. Instead, the negligible differences between GlyDMAB and dye‐doped GlyDMA formulation ( D p = 0.113 ± 0.01 mm) can be likely ascribed to the presence of biotin showing little absorbance in the wavelength range of interest .…”

supporting

confidence: 79%

Biotinylated Photopolymers for 3D‐Printed Unibody Lab‐on‐a‐Chip Optical Platforms

Credi

Griffini

Levi

et al. 2017

Small

View full text Add to dashboard Cite

Nowadays, 3D printing represents a consolidated technology enabling the fabrication of rapidly configurable and highly customizable parts. In contrast to traditional subtractive manufacturing approaches, with 3D printing complex designs of virtually any solid shape can be converted into physical objects within few hours starting from a computer-aided design (CAD) model and by depositing material in a layer-by-layer additive fashion. [1] In this respect, no additional costs for multiparts assembling steps are requested and the concept of flexibility characterizing this cost-effective additive manufacturing (AM) approach is strengthened by the constantly growing numberThe present work reports the first demonstration of straightforward fabrication of monolithic unibody lab-on-a-chip (ULOCs) integrating bioactive micrometric 3D scaffolds by means of multimaterial stereolithography (SL). To this end, a novel biotin-conjugated photopolymer is successfully synthesized and optimally formulated to achieve high-performance SL-printing resolution, as demonstrated by the SL-fabrication of biotinylated structures smaller than 100 µm. By optimizing a multimaterial single-run SL-based 3D-printing process, such biotinylated microstructures are incorporated within perfusion microchambers whose excellent optical transparency enables real-time optical microscopy analyses. Standard biotin-binding assays confirm the existence of biotin-heads on the surfaces of the embedded 3D microstructures and allow to demonstrate that the biofunctionality of biotin is not altered during the SL-printing, thus making it exploitable for further conjugation with other biomolecules. As a step forward, an in-line optical detection system is designed, prototyped via SL-printing and serially connected to the perfusion microchambers through customized world-to-chip connectors. Such detection system is successfully employed to optically analyze the solution flowing out of the microchambers, thus enabling indirect quantification of the concentration of target interacting biomolecules. The successful application of this novel biofunctional photopolymer as SL-material enables to greatly extend the versatility of SL to directly fabricate ULOCs with intrinsic biofunctionality.

show abstract

supporting

confidence: 79%

Biotinylated Photopolymers for 3D‐Printed Unibody Lab‐on‐a‐Chip Optical Platforms

Credi

Griffini

Levi

et al. 2017

Small

View full text Add to dashboard Cite

show abstract

“…Ceramic SL parts were also fabricated using 40 vol% nanosilica suspensions, which yielded 99% dense structures after sintering at 1250°C for 2 hours. In addition, porous materials have also been produced by the SL technique using terpene‐acrylate vehicles . Other promising SL‐processed objects made from YSZ, HA, Bi(V x Nb 1− x )O 4 (BVN), and β‐tricalcium phosphate (β‐TCP) have also been found in the literature.…”

Section: Development Of Pastes and Inks For Additive Manufacturing (Am)mentioning

confidence: 99%

Colloidal processing: enabling complex shaped ceramics with unique multiscale structures

et al. 2017

View full text Add to dashboard Cite

Colloidal processing of fine ceramic powders enables the production of complex shaped ceramics with unique micro and macro structures which are not possible to produce via conventional dry processing routes. Because of this enhanced structural control and shaping capabilities, colloidal processing has been exploited to produce ceramic components with ever increasing complexity and functionalities. In this review, we revisit some of the research efforts on this topic to highlight its relevance and growing importance for the advanced manufacturing of functional ceramics. Selected examples of colloidal systems with increasing level of complexity are discussed to showcase the wide range of structures that can be generated through wet processing approaches. The historical development and background knowledge pertaining to colloids and surface interactions is first briefly reviewed. The major colloidal shape forming and additive manufacturing processes that utilize colloidal pastes and inks are then reviewed, highlighting the control of suspension rheology needed in these techniques. Next, methodologies that combine suspended particles with a pore‐forming phase are discussed as a means to produce porous ceramic materials. Further control over the interactions between anisotropic particles and their alignment in suspensions can be gained via externally applied fields (such as magnetic) to produce texturally aligned green bodies. This leads to bioinspired ceramics that can programmably morph into complex shaped objects upon sintering. Hierarchical porous structures with high mechanical efficiency are also shown as an example of the multiscale designs that can be generated through advanced colloidal processing. As drying of ceramic bodies is an inevitable consequence of wet colloidal processing, the current understanding of this critical processing step is reviewed. Finally, the gaps in knowledge in these fields are discussed to provide our perspective on where the field may support advances in ceramics in the future.

show abstract

“…Ice templating implies that water is used. A variety of solvents have been used to date: water [8], camphene [9], tert-butyl alcohol (TBA) [10], naphthalene/camphor [11], dioxane [12], terpene [13], deep eutectic solvents [14], or carbon dioxide [15]. Various terms have been coined for the process: ice templating [16], freeze-casting [1], crystal-templating [17], directional freeze-drying [18], freeze-thaw [19] freeze gelation [20], ice-segregation-induced self-assembly [21], or thermally induced phase separation [22].…”

Section: Introductionmentioning

confidence: 99%

A meta-analysis of the mechanical properties of ice-templated ceramics and metals

Deville

Meille

Seuba

2015

Science and Technology of Advanced Materials

View full text Add to dashboard Cite

Ice templating, also known as freeze casting, is a popular shaping route for macroporous materials. Over the past 15 years, it has been widely applied to various classes of materials, and in particular ceramics. Many formulation and process parameters, often interdependent, affect the outcome. It is thus difficult to understand the various relationships between these parameters from isolated studies where only a few of these parameters have been investigated. We report here the results of a meta analysis of the structural and mechanical properties of ice templated materials from an exhaustive collection of records. We use these results to identify which parameters are the most critical to control the structure and properties, and to derive guidelines for optimizing the mechanical response of ice templated materials. We hope these results will be a helpful guide to anyone interested in such materials.

show abstract

Porous Ceramics by Photopolymerization with Terpene–Acrylate Vehicles

Cited by 30 publications

References 17 publications

Biotinylated Photopolymers for 3D‐Printed Unibody Lab‐on‐a‐Chip Optical Platforms

Biotinylated Photopolymers for 3D‐Printed Unibody Lab‐on‐a‐Chip Optical Platforms

Colloidal processing: enabling complex shaped ceramics with unique multiscale structures

A meta-analysis of the mechanical properties of ice-templated ceramics and metals

Contact Info

Product

Resources

About