Membrane Process
Development Made Easier
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Cells for characterization of
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ion-exchange membranes​
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spacers and ion-exchange resins
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Electrodialysis modules
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Electrolysers
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Components and tools
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Test benches
Lab Test Equipment
Field of
Expertise
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Electromembrane Processes:
ED, EDBM, EDI, CDI, KTL, etc. -
Filtration: MF, UF
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Membrane Distillation
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Solution-diffusion membranes
Consulting
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Acquisition of a technology start-up
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Patent licensing
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Diversification into new business field
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Resolution of manufacturing issues
From microscale material research to an industrial plant,
here is a long way of development at different levels.
We help to investigate and scale-up your membrane process with designs and materials suitable for further full-scale industrial application.
We are working with different membrane technologies, while electro-chemical processes, like electrodialysis and electrolysis, build the core of our expertise.
Material Testing
Membranes and other components of the modules are steadily characterized in our lab.
The measurements are performed on original materials from customer and
can be combined with accelerated ageing or anther treatment.
You can send us material samples for analysis and shortly after get a confidential test-report.
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Listed below are characteristics measured using established methods.
For testing other parameters, developing a specific measurement procedure, leasing
or purchasing the test equipment please send a request.
Ion-Exchange Membranes
Recording impedance spactra and current-voltage curves of bipolar membranes
• Area resistance; conductivity (through plane)
• Permselectivity to counter-ions
• Impedance and current-voltage curves of bipolar membranes
• Electrochemical characteristics of a membrane or a
Membrane-Electrode Assembly at different temparatures and humidities
• Water uptake
• Ion-Exchange Capacity
• Expansion (by swelling, transfer of ionic form, or change of con-
centration and temperature)
• Water permeability (pressure gradient)
• Diffusion permeability (concentration gradient)
• Thickness
• Mullen Burst Test
• Stress-strain test (wet, or dry)
Measuring permselectivity of
ion-exchange membranes
also applicable to other dense membranes
also applicable to other flat sheet materials, incl. porous membranes and non-permeable films
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Dense membranes and gaskets
Monosphere ion-exchange resin beads in light microscope
• Gas parmermeability (pressure gradient). Examples:
- Hydrogen permeability of flat-sheet gasket material at different temperatures and hymidities to
evaluate suitability for sealing
- Air permeability of dense membranes (integrity test)
Ion-Exchange Resins
• Electrical conductivity of ion-exchange resin bed at different compressions
• Ion-Exchange Capacity
• Selectivity
• Density of powdered ion-exchange resins
Measuring conductivity of
ion-exchange resins
Spacers
Integrated spacers for measuring mass transfer
• Mass transfer coefficient in a spacer filled channel
• Pressure lost in a spacer-filled channel
• Void fraction of a spacer net
Extruded spacer net in light microscope
General characterization of plastics and other materials
TOC-Analyser
• Total Organic Carbon (TOC) analysis in solid and liquid samples
(e.g. water after membrane extraction test)
• Scanning Electron Microscopy (SEM)
coupled with Energy Dispersive X-Ray Analysis (EDX)
for detection of metals on the surface
• Light- and UV-microscope
• Termogravimetric analysis (TGA) coupled with
Fourier-transform infrared spectroscopy (FTIR)
to characterize a material's thermal stability
SEM imaging a cross-section of a heterogeneous
ion-exchange membrane
