Manufacturing and characterization of porous ceramic capillary membranes for enzyme functionalization through click chemistry

Tajiri, Henrique A.; Al-Qureshi, H. A.

doi:10.1007/s40430-020-2254-1

Cited by 5 publications

(4 citation statements)

References 24 publications

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“…This powder as a specific surface area of 16 m 2 g -1 and an actual particle size of 40 nm. The SEM [38] and TEM [39] analysis confirm the presence of 40 nm crystallites in 167 nm soft agglomerates.…”

Section: Experiments and Methodsmentioning

confidence: 57%

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Porous stage assessment of pressure assisted sintering modeling parameters: a ceramic identification method insensitive to final stage grain growth disturbance

Manière

Harnois²

2021

Acta Materialia

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Section: Experiments and Methodsmentioning

confidence: 57%

“…This method using equations (45-47) assumes the applied stress is the dominant effect otherwise the bulk modulus (𝜓) cannot be eliminated using equations (38) and (39). A high pressure needs to be applied for this method.…”

Section: Identification Of 𝜓mentioning

confidence: 99%

Porous stage assessment of pressure assisted sintering modeling parameters: a ceramic identification method insensitive to final stage grain growth disturbance

Manière

Harnois²

2021

Acta Materialia

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“…(i) at the final stage of sintering, grain growth caused a deviation from the linear trend (estimation of grain size was based on this deviation) and (ii) in the initial stage, a second deviation was observed. Based on the studies by Tajiri and Al-Qureshi and Majidi et al [43,44], highly reactive nanoparticles (40 nm) lead to presintering of the powder. It was found that the microstructure at the sintering onset (1350 K) consists of grains of approximately 96 nm.…”

Section: Sintering Model Identificationmentioning

confidence: 99%

Estimate microstructure development from sintering shrinkage: A kinetic field approach

Manière

Grippi

2022

Materials Today Communications

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“…Although the powder particles are already small enough for the process and will be added to the suspension as received, a proper slurry preparation is required to break up agglomerates and homogenize the suspension, which will be discussed in the next section. Source: Adapted from [254,255].…”

Section: Ceramic Powders Preparationmentioning

confidence: 99%

Additive manufacturing of advanced ceramics by digital light processing: equipment, slurry, and 3D printing

Camargo¹

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Additive manufacturing (AM) or 3D printing is a set of technologies that fabricate parts by successively adding layers. This technique is already applied in all classes of materials. In ceramic manufacturing, AM allows the fabrication of small series components with greater geometric freedom, lower cost, and reduced delivery time. Among the AM technologies, vat photopolymerization (VP) stands out for its ability to produce ceramic pieces with excellent dimensional accuracy and surface finish. However, there is a shortage of VP commercial equipment dedicated to producing ceramics at an affordable price, given the challenges of dealing with raw material with high particle loading. In this work, which approaches the fabrication of advanced ceramics by digital light processing VP, the feasibility of using a topdown 3D printer prototype and an ordinary commercial bottom-up printer (usually applied in polymer 3D printing) in the processing of ceramic materials was tested. For this, a 3D printer prototype was designed and built, creating an innovative recoating system (patent pending), composed of two blades with distinct and sequential functions. This system aims to overcome the challenge of creating layers for ceramic suspensions, which usually have high viscosity. In addition, photosensitive suspensions were developed seeking to meet process requirements related to high ceramic loading, rheological behavior, photosensitive parameters, and stability.The ceramic powders were selected to evaluate the process using distinct groups of advanced ceramics: nanometric powders (3Y-TZP) and submicrometric powders (electrofused mullite).Furthermore, a combination of natural raw material (zircon) with alumina was used to investigate the in-situ formation of mullite-zirconia composites in 3D printed parts. Thus, photosensitive ceramic suspensions based on a nanometric zirconia powder (3Y-TZP) were developed and characterized, selecting the appropriate components (monomer, photoinitiator, and dispersant). In this way, a ceramic slurry was obtained capable of validating the developed prototype and manufacturing green ceramic bodies. Nonetheless, the same formulation was not suitable for the commercial 3D printer, due to its rheological behavior not being compatible with the equipment. On the other hand, the submicrometric mullite powder allowed the preparation of formulations with high solid loading (up to 50 vol%). These new formulations were successfully used in both pieces of equipment tested. Furthermore, the formulation based on the mixture of ceramic powders (zircon and alumina) showed that the technique can be combined with reactive sintering to create in-situ mullite and zirconia composites. After analysis of the thermal decomposition, a protocol for the thermal treatment was created and the printed bodies were submitted to burning of the organic components and sintering. Both 3D printers tested proved capable of creating dense ceramic pieces (>95%) and with geometries that would be unfeasible or even impossible by other man...

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Manufacturing and characterization of porous ceramic capillary membranes for enzyme functionalization through click chemistry

Cited by 5 publications

References 24 publications

Porous stage assessment of pressure assisted sintering modeling parameters: a ceramic identification method insensitive to final stage grain growth disturbance

Porous stage assessment of pressure assisted sintering modeling parameters: a ceramic identification method insensitive to final stage grain growth disturbance

Estimate microstructure development from sintering shrinkage: A kinetic field approach

Additive manufacturing of advanced ceramics by digital light processing: equipment, slurry, and 3D printing

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