Perspective on 3D printing of separation membranes and comparison to related unconventional fabrication techniques

Low, Ze Xian; Chua, Yen Thien; Ray, B.; Mattia, Davide; Metcalfe, Ian S.; Patterson, Darrell Alec

doi:10.1016/j.memsci.2016.10.006

Cited by 348 publications

(238 citation statements)

References 122 publications

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“…During the last decade, laser sintering (LS) has become one of the most promising polymer Additive Manufacturing techniques, capable of manufacturing 3‐dimensional (3D) products with complex and accurate geometries from powdered materials. However, the range and reliability of materials for this process is currently a limiting factor; the ultimate aim of this research is to address this issue …”

Section: Introductionmentioning

confidence: 99%

Surface modification of the laser sintering standard powder polyamide 12 by plasma treatments

Almansoori

Masters

Abrams

et al. 2018

Plasma Processes & Polymers

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Polyamide 12 (PA12) powder was exposed for up to 3 h to low pressure air plasma treatment (LP‐PT) and several minutes by two different atmospheric pressure plasma jets (APPJ) i.e., kINPen (K‐APPJ) and Hairline (H‐APPJ). The chemical and physical changes resulting from LP‐PT were observed by a combination of Scanning Electron Microscopy (SEM), Hot Stage Microscopy (HSM) and Fourier transform infrared spectroscopy (FTIR), which demonstrated significant changes between the plasma treated and untreated PA12 powders. PA12 exposed to LP‐PT showed an increase in wettability, was relatively porous, and possessed a higher density, which resulted from the surface functionalization and materials removal during the plasma exposure. However, it showed poor melt behavior under heating conditions typical for Laser Sintering. In contrast, brief PJ treatments demonstrated similar changes in porosity, but crucially, retained the favorable melt characteristics of PA12 powder.

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Section: Introductionmentioning

confidence: 99%

Surface modification of the laser sintering standard powder polyamide 12 by plasma treatments

Almansoori

Masters

Abrams

et al. 2018

Plasma Processes & Polymers

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“…The resolution of DLP printing is typically in the range from 15 to 100 µ m [LCR*17]. It depends on the quality and pixel resolution of the digital micromirror device (DMD) chip of the projector and on the step‐precision of the building plate.…”

Section: Subvoxel Growthmentioning

confidence: 99%

Microstructure Control in 3D Printing with Digital Light Processing

Luongo

Falster

Doest

et al. 2019

Computer Graphics Forum

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Digital light processing stereolithography is a promising technique for 3D printing. However, it offers little control over the surface appearance of the printed object. The printing process is typically layered, which leads to aliasing artefacts that affect surface appearance. An antialiasing option is to use greyscale pixel values in the layer images that we supply to the printer. This enables a kind of subvoxel growth control. We explore this concept and use it for editing surface microstructure. In other words, we modify the surface appearance of a printed object by applying a greyscale pattern to the surface voxels before sending the cross‐sectional layer images to the printer. We find that a smooth noise function is an excellent tool for varying surface roughness and for breaking the regularities that lead to aliasing. Conversely, we also present examples that introduce regularities to produce controlled anisotropic surface appearance. Our hope is that subvoxel growth control in stereolithography can lead 3D printing towards customizable surface appearance. The printing process adds what we call ground noise to the printed result. We suggest a way of modelling this ground noise to provide users with a tool for estimating a printer's ability to control surface reflectance.

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“…Additive and subtractive manufacturing methods are therefore ideal for this purpose. Complementary to materials and microstructure development, methods such as binder jetting and photo‐polymerization are currently being advanced to shorten iteration cycles in research and development .…”

Section: Dense Membranesmentioning

confidence: 99%

Ceramic Membranes: Materials – Components – Potential Applications

et al. 2019

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Gas separation in dense ceramic membranes is driven by the partial pressure gradient across the membrane. The mixed conducting materials most commonly used are single‐phase perovskites or fluorites. In recent years, the development of dual‐phase systems combining a mixed ion‐conducting and electron‐conducting phase has increased. The advantage is that a larger number of very stable materials systems is available. The membrane designs currently used include planar, tubular, hollow‐fiber, and honeycomb membranes. Each of these designs has specific advantages and disadvantages, depending on the application. Innovative joining concepts are also often needed due to the high temperatures involved. These usually involve the use of glass‐ceramic sealants or reactive metal brazes. Applications focus either on the separation of gases alone, i.e., the supply of oxygen or hydrogen, or on membrane reactors. In membrane reactors, a chemical reaction occurs on one or both sides of the membrane in addition to gas separation. The supply of gases is of potential interest for power plants, for the cement, steel, and glass industries, for the medical sector, and for mobile applications. Membrane reactors can be used to produce base chemicals or synthetic fuels.

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Perspective on 3D printing of separation membranes and comparison to related unconventional fabrication techniques

Cited by 348 publications

References 122 publications

Surface modification of the laser sintering standard powder polyamide 12 by plasma treatments

Surface modification of the laser sintering standard powder polyamide 12 by plasma treatments

Microstructure Control in 3D Printing with Digital Light Processing

Ceramic Membranes: Materials – Components – Potential Applications

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