Additively manufactured complex ceramic structures for the filtration of water
Veranstaltung beendet
Kostenlose Veranstaltung
News from the AM scene with Hans Georg Pensel of the EAH Jena about
Veranstaltung beendet
Kostenlose Veranstaltung
Veranstaltungssprache
- German
News from the AM scene with Hans Georg Pensel of the EAH Jena about
In the course of evolution, living organisms have succeeded in developing energy-efficient and resource-saving metabolic functions that run in parallel, with a high degree of precision and in a very confined space. Membranes are an essential element in this process and control (often self-learning) the transport of substances in the body as a microscopic cell wall or macroscopic organ.
The research addressed aims to improve existing membranes and membrane modules in terms of flow rate, selectivity, energy consumption and volume-specific membrane surface area.
Additive manufacturing is a central component in the production of novel and innovative membranes. The use of established and modified 3D printing processes enables the production of complex membrane structures and their carriers. This offers possibilities for optimizing the material flows in the membrane module and currently increases the volume-specific membrane area by up to 300%. Bath-based photopolymerization (VPP) in the form of digital light processing and material extrusion (MEX) or fused layer modelling are addressed. In the former manufacturing process, highly filled suspensions with Al2O3 powders were developed and investigated and the complex structures printed. In the FLM process, the bionically structured components are built up from a filled filament. The material is more precisely described as RBAO (reaction bonded aluminum oxide). This leads to considerable advantages in subsequent debinding and sintering processes. In general, the additively manufactured structures are debinded and sintered to create a porous ceramic molded body. These carriers can already be used as membranes for individual applications with the appropriate pore size and porosity. However, they are mainly used for coating with ceramic slurries to create pores in the nanometer range. The current state of our research achieves ceramic membranes with a pore size of 0.07 µm.
Another topic is the post-processing of additively manufactured green bodies. We are currently investigating methods for smoothing the surface of the substrates. The layer structure created in 3D printing, layers deposited on top of each other, must be processed in order to apply functional coatings for a membrane.
In the lecture, the entire process chain consisting of CAD design, slicing, additive manufacturing, debinding and sintering processes as well as further post-processing and coating will be presented and the realized pore structure and membrane properties will be discussed.
The research addressed aims to improve existing membranes and membrane modules in terms of flow rate, selectivity, energy consumption and volume-specific membrane surface area.
Additive manufacturing is a central component in the production of novel and innovative membranes. The use of established and modified 3D printing processes enables the production of complex membrane structures and their carriers. This offers possibilities for optimizing the material flows in the membrane module and currently increases the volume-specific membrane area by up to 300%. Bath-based photopolymerization (VPP) in the form of digital light processing and material extrusion (MEX) or fused layer modelling are addressed. In the former manufacturing process, highly filled suspensions with Al2O3 powders were developed and investigated and the complex structures printed. In the FLM process, the bionically structured components are built up from a filled filament. The material is more precisely described as RBAO (reaction bonded aluminum oxide). This leads to considerable advantages in subsequent debinding and sintering processes. In general, the additively manufactured structures are debinded and sintered to create a porous ceramic molded body. These carriers can already be used as membranes for individual applications with the appropriate pore size and porosity. However, they are mainly used for coating with ceramic slurries to create pores in the nanometer range. The current state of our research achieves ceramic membranes with a pore size of 0.07 µm.
Another topic is the post-processing of additively manufactured green bodies. We are currently investigating methods for smoothing the surface of the substrates. The layer structure created in 3D printing, layers deposited on top of each other, must be processed in order to apply functional coatings for a membrane.
In the lecture, the entire process chain consisting of CAD design, slicing, additive manufacturing, debinding and sintering processes as well as further post-processing and coating will be presented and the realized pore structure and membrane properties will be discussed.
