Study of gradual porous metallic membranes obtained by powder sedimentation

Vida–Simiti, Ioan; Jumate, Nicolaie; Thalmaier, György; Sechel, Niculina; Moldovan, Valentin

doi:10.1007/s10934-010-9442-9

Cited by 12 publications

(14 citation statements)

References 23 publications

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“…Sample heating can be achieved through direct conduction, micro-waves or light-laser irradiation 29,[56][57][58][59] . The properties of the porous metal materials' compressibility and the required morphology of the final product will determine the most appropriate heating technique 30 .…”

Section: Thermo-mechanical Sinteringmentioning

confidence: 99%

“…This was attributed to the higher probability of defects or functional groups on the NPs surface, as well as to their enhanced thermal diffusivity arising from size effects and to the larger number of contacts made between NPs within agglomerates. Foaming agents, similar to the ones used in liquid forming, can also be added in order to enhance the porosity of the structure 57,62 .…”

Section: A) B) C)mentioning

confidence: 99%

“…Sample heating can be achieved through direct conduction, micro-waves or light-laser irradiation. 29,[56][57][58][59] The properties of the porous metal materials' compressibility and the required morphology of the nal product will determine the most appropriate heating technique. 30 The size and reactivity of the particles to be sintered have to be well understood in order to avoid densication by over-heating and fusion.…”

Section: Solid Phase Formingmentioning

confidence: 99%

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The fabrication and surface functionalization of porous metal frameworks – a review

Dumée

Bao

et al. 2013

J. Mater. Chem. A

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Porous metal frameworks offer potentially useful applications for the aerospace, automotive and bio-medical industries. They can be used as electrodes, actuators, or as selective membrane films. The versatility of the physical features (pore size, pore depth, overall porosity and pore surface coverage) as well as the large range of surface chemistries for both metal oxides and pure noble metals offers scope to functionalise metal nano-particles and networks of nano-porous metal structures. As well as traditional routes to producing metal structures, such as metal sintering or foaming, novel high-throughput techniques have recently been investigated. Nanoparticle self-assembly, metal ion reduction and deposition as well as metal alloy de-alloying were identified as sustainable routes to produce large surface areas of such nano-porous metal frameworks. The main limitations of the current fabrication techniques include the difficulty to process stable and homogeneous arrays of nano-scale pores and the control of their morphology due to the high reactivity of nano-structured metal structures. This paper aims at critically reviewing the various fabrication techniques and surface functionalization routes used to produce advanced functional porous metal frameworks. The limitations and advantages of the different fabrication techniques will be discussed in light of the final material properties and targeted applications. Keywordsporous metal frameworks; porous metal fabrication routes; metal surface chemistry; application of metal frameworks; 3

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Section: Thermo-mechanical Sinteringmentioning

confidence: 99%

Section: A) B) C)mentioning

confidence: 99%

Section: Solid Phase Formingmentioning

confidence: 99%

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The fabrication and surface functionalization of porous metal frameworks – a review

Dumée

Bao

et al. 2013

J. Mater. Chem. A

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“…12,13 While homogeneous and periodic porosity facilitates structural characterization using scattering techniques, it is not always the most desirable. [20][21][22][23][24] Moreover, while non-equilibrium formation principles for asymmetric membrane formation have recently been combined with macromolecular self-assembly, 14 to the best of our knowledge a general strategy to translate such template structures into graded porous inorganic materials has not been described. 14,15 Fuel cell electrodes with a pore size gradient could minimize mass transport resistance to gases or fluids while also increasing the effective catalyst utilization and power density.…”

Section: Introductionmentioning

confidence: 99%

“…However, none of these approaches harnesses the versatility of macromolecular self-assembly, and porosity differences and gradients achieved are often difficult to tailor and predict. [20][21][22][23][24] Moreover, while non-equilibrium formation principles for asymmetric membrane formation have recently been combined with macromolecular self-assembly, 14 to the best of our knowledge a general strategy to translate such template structures into graded porous inorganic materials has not been described. Such self-assembly directed graded porous structures made from carbons, metals, and oxides are highly desirable, however, as they would converge the fine tunability of polymer materials properties like pore structure, surface area, and permeability with those typical of carbons, metals or oxides including high temperature stability, high electrical and thermal conductivity, catalytic activity, and mechanical strength.…”

Section: Introductionmentioning

confidence: 99%

Graded porous inorganic materials derived from self-assembled block copolymer templates

Werner

Dorin

et al. 2015

Nanoscale

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Graded porous inorganic materials directed by macromolecular self-assembly are expected to offer unique structural platforms relative to conventional porous inorganic materials. Their preparation to date remains a challenge, however, based on the sparsity of viable synthetic self-assembly pathways to control structural asymmetry. Here we demonstrate the fabrication of graded porous carbon, metal, and metal oxide film structures from self-assembled block copolymer templates by using various backfilling techniques in combination with thermal treatments for template removal and chemical transformations. The asymmetric inorganic structures display mesopores in the film top layers and a gradual pore size increase along the film normal in the macroporous sponge-like support structure. Substructure walls between macropores are themselves mesoporous, constituting a structural hierarchy in addition to the pore gradation. Final graded structures can be tailored by tuning casting conditions of self-assembled templates as well as the backfilling processes. We expect that these graded porous inorganic materials may find use in applications including separation, catalysis, biomedical implants, and energy conversion and storage.

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Heat Transfer Enhancement of Paraffin Phase Change Composite Material Using Recycled Aluminum Sawing Chips

Thalmaier

Sechel

Vida–Simiti

2019

JOM

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Study of gradual porous metallic membranes obtained by powder sedimentation

Cited by 12 publications

References 23 publications

The fabrication and surface functionalization of porous metal frameworks – a review

The fabrication and surface functionalization of porous metal frameworks – a review

Graded porous inorganic materials derived from self-assembled block copolymer templates

Heat Transfer Enhancement of Paraffin Phase Change Composite Material Using Recycled Aluminum Sawing Chips

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