SPP 2045 Projektbereiche

The various research topics are put into different clusters. By clicking on a title below you find short descriptions in PDF format as well as contacts for each project.

Projektbereich A - Beeinflussung des Trennmerkmals

A description of this cluster will follow soon.

A3: Selective particle separation at liquid-liquid interfaces

This specific subproject deals with the separation of particles through immiscible liquid-liquid interfaces. The entrainment of particles in liquid-liquid interfaces is chiefly controlled by their radius and their wettability.

Contacts: Christian Weber TU Bergakademie Freiberg

Further details can be found here.

A4: Multidimensional material separation through selective agglomeration

The agglomeration in liquids or “spherical agglomeration” is based on a three-phase system consisting of two liquids with a miscibility gap and a heterogeneous suspended solid phase. Essential for this process are the surface energies resulting in wetting properties of the suspended particles.

Contacts: Julia Schreier Hochschule Trier Umwelt-Campus Birkenfeld

Further details can be found here.

A5: Kontinuierliche Klassierung von Nanopartikeln mittels selektiver Agglomeration nach größe, Zusammensetzung und Oberflächeneigenschaften

The aim of this research project is the development of a continuous, scalable and multidimensional classification process according to size composition and surface properties for nanoparticles smaller than 10 nm.

Contacts: Christina Menter Friedrich-Alexander Universität Erlangen-Nürnberg

Further details can be found here.

A6: Charge-based selective separation of submicron particles from grinding processes

In the field of pharmaceutical and life science products as well as for optical applications, suspensions with particle sizes in the submicron/nanometer range with the highest quality standards are required. Within the top-down synthesis in stirred media mills, for example, wear (abrasion) of the mill components, primarily the grinding media, is a major challenge.

Contacts: Christoph Peppersack TU Braunschweig

Further details can be found here.

A7: Multidimensional fractionation of finely dispersed particles using the cross-flow filtration with superimposed electric field

The separation of particle fractions with highly specific physical properties from suspensions has great importance for process success in a number of process engineering processes. The physical properties of a particle collective are directly related to the particle size, particle shape, surface properties and chemical composition of the individual particles.

Contacts: Philipp Lösch TU Kaiserslautern

Further details can be found here.

A9: Fractionation of Nanoparticles by Preparative Gel Electrophoresis

This subproject shall investigate the fractionation of these synthesized particles with preparative gel electrophoresis. Thereby, the nanoparticles are separated spatially in an appropriate gel due to their different electrophoretic mobilities.

Contacts: Matthäus Barasinski TU Braunschweig

Further details can be found here.

 

Projektbereich B - Verständnis der Mikroprozesse der Trennung

A description of this cluster will follow soon.

B1: Preparative fractionation of carbon nanotubes in microfluidic channels by combining centrifugal and electrical separation fields

The main objective of this project is the development of a method for the preparative fractionation of semiconducting and metallic SWCNTs using a microfluidic system based on asymmetric field-flow fractionation (FFF) and dielectrophoresis of metallic SWCNTs on taxi particles that can be sedimented in the centrifugal field.

Contacts: Marc-Peter Schmidt TH Brandenburg

Further details can be found here.

B3: Deterministic-hydrodynamic size-, shape- and density fractionation of polydisperse microparticles

Goal of the project is to deepen the understanding of continuous microfluidic separation methods (Multi Orifice Fluid Fractioning (MOFF), Serpentine Channel and Deterministic Lateral Displacement Fractioning (DLDF)) utilized for particle separation based on multiple characteristics (size, density and shape). To enable microfluidic separation methods in an industrial context for elevated throughput operation, both enlarged Reynolds numbers and enlarged particle loadings are studied.

Contacts: Sebastian Blahout Ruhr Universität Bochum and Simon Raoul Reinecke TU Berlin

Further details can be found here.

B4: Selektive Partikelfraktionierung in Mehrparameter-Potentialfeldern/ Multi-Feld-Fraktionierung (M-FF)

Within this subproject, a modular prototype for Hybrid-FFF is developed, which is combining the effects of an ultrasonic resonant acoustic field with an electrostatic field.

Contacts: Krischan Sandmann Uni Bremen

Further details can be found here.

B7: Ultrasound supported microbubble flotation

In this subproject, the conventional column flotation will be modified by the use of microbubbles and the coupling of ultrasound, in order to achieve a separation for particles smaller than 10 µm. Since microbubbles possess a low buoyancy and the production of high concentrations is technically complex, a bi-modal bubble system of micro- and macro bubbles will be used.

Contacts: Maria Syngelaki TU Bergakademie Freiberg

Further details can be found here.

B8: Nanobubble induced centrifugal field flotation of Nanoparticles

The introduced project aimes to develop a flotation technique, which is able to realize a separation of particles below the 10 µm mark. The concept relies on the nucleation of nanobubbles during decompression on the surface of the particles themself. Surfactants may be used to stabilize the nanobubbles.

Contacts: Johannes Fellner TU Clausthal

Further details can be found here.

B10: Multidimensional separation by magnetic hetero-agglomeration

The process commonly referred to as „Magnetic-seeded filtration” aims to separate fine paramagnetic particles by agglomerating them with magnetic particles followed by a HGMS (high gradient magnetic separation) step. The aim of this project is to take a closer look at the hetero-agglomeration of ferro- and paramagnetic particles.

Contacts: Frank Rhein Karlsruher Institut für Technologie (KIT)

Further details can be found here.

B11: MultiDimFlot – Efficient multidimensional separation of ultrafine particles using a mechanical flotation cell combined with froth fractionation

The main aim of this project is to develop a new technology for the efficient multidimensional separation of ultrafine particles via a combination of existing flotation techniques. Based on classic froth flotation, this innovative concept will associate the advantages of a mechanical flotation cell that comes with a high particle-bubble collision rate (thus a high recovery) with those from a flotation column with a fractionating effect due to its deep froth (thus a high grade).

Contacts: Johanna Sygusch Helmholtz-Institut Freiberg für Ressourcentechnologie

Further details can be found here.

B12: Dielectrophoretic particle chromatography

In this project it is intended to shed some light on the grounds for the DPC's potential capability to fractionate particles according to their size, shape and material and in dependence of throughput. This understanding shall pave the way for scaling-up such a separation process and to evaluate its potential as a characterization technology for microparticles.

Contacts: Jasper Giesler Universität Bremen UFT

Further details can be found here.

 

Projektbereich C - Apparative und prozesstechnische Konzepte

A description of this cluster will follow soon.

C1: Electrodeless dielectrophoretic filtration

In this project, we model a switchable selective filter through a geometrically defined microfluidic channel with an array of insulating posts which is superimposed by an alternating electric field. Perspectively, fibreglass membranes can substitute the function of the insulating posts.

Contacts: Laura Weinrauch Universität Bremen UFT

Further details can be found here.

C3: Deflector wheel classifier with a high sharpness of cut for the classification of submicron particles at high loadings with integrated material sorting

A reduction of the cut size and an improvement of the sharpness of cut are hampered by fluid dynamic phenomena around and inside the classifier wheel. At higher revolution rates, vortices are built up between the blades, which cause a remixing of the already classified material. Due to the geometry of the powder feed, streaks are formed, which cause a pre-classification with a low selectivity. These two phenomena shall be investigated in the proposed project in order to realise a high sharpness of cut in the submicron range.

Contacts: Leonard Hansen TU Clausthal

Further details can be found here.

C5: Sequential aerodynamic classification: Separating microscopic airborne particles by size and density

This work aims to eliminate one major flaw in aerodynamic classification. Applying aerodynamic means to separate particles by size, inhabits an uncertainty introduced by the very same inertia, that is used as the classifying criteria for aerodynamic separation.

Contacts: Matthias Masuhr Universität Duisburg

Further details can be found here.

C7: Centrifugal fractionation of ultrafine particles by means of geometric and material separation characteristics in a strong centrifugal field

The aim of the project is to develop a basic model for the multi-dimensional fractionation of ultrafine particles in strong centrifugal fields based on experimental measurements. The field of application reaches beyond the laboratory scale and therefore a capable in-situ measuring technique needs to be included in the process.

Contacts: Marvin Winkler Karlsruher Institut für Technologie (KIT)

Further details can be found here.

C9: Multi-dimensional particle fractionation in microsystems

In this project we want to investigate multidimensional particle fractionation by combining different microfluidic modules such as a passive deterministic lateral displacement (DLD) post array with an active fractionation device using electric or magnetic fields.

Contacts: Jonathan Kottmeier TU Braunschweig

Further details can be found here.

C11: Kontinuierliche Fraktionierung von Feinstpartikeln mittel magnetfeldgesteuerter Gegenstromchromatografie

In this project, a magnetically controlled chromatography is used to achieve a size fractionation of nanoparticles in the range of 10 to 500 nanometres. In this context, the interaction of three forces represents the relevant parameters for a successful fractionation: the hydrodynamic drag force, random diffusion force and the magnetic force.

Contacts: Carsten-Rene Arlt Karlsruher Institut für Technologie (KIT)

Further details can be found here.

 

Z - Zentralprojekte

A description of this cluster will follow soon.

Z1: Multidimensional and Correlative Characterization of Particle Systems

The central project Z1 will provide methods and estimations for the determination of multidimensional particle properties and acts as service partner for measuring tasks from the SPP-members.

Contacts: Stefan Neumann and Ralf Ditscherlein TU Bergakademie Freiberg

Further details can be found here.

Z2: Stochastic modeling of multidimensional particle characteristics with parametric copulas for the analysis of microstructural effects during separation processes of particle systems

The central project Z2 will analyze tomographic image data before and after separation processes to statistically summarize distributions of multidimensional particle shape and size characteristics with parametric copulas.

Contacts: Orkun Furat Universität Ulm

Further details can be found here.

Z4: Two-scale approach for the simulation of multidimensional fractionation of fine particles

The central project Z4 aims at the clarification of the behaviour of particle suspensions in the critical size range between 100nm and 10µm by consideration of different separation features for a multidimensional fractionation.

Contacts: Robin Trunk Karlsruher Institut für Technologie (KIT)

Further details can be found here.