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Open-Source Rheology Solutions by NETZSCH

Transform Soft Material Testing with Rheodialysis for NETZSCH Kinexus Rheometer

Rheodialysis technology: A new tool for real-time characterization and testing of soft materials. 

Rheodialysis allows for real time changes of a sample´s chemistry by applying ions via a membrane into the sample on a rotational rheometer.

Explore the innovative rheodialysis developed by the University of Liverpool (Dr. Anders Aufderhorst-Roberts, Lecturer in Sustainable & Biological Materials at the School of Engineering) and Durham University (Prof. John Girkin, Professor of Biophysics at the Department of Physics) in collaboration with NETZSCH, offering an unprecedented capability to probe the interplay between chemical environments and mechanical forces in soft materials.

Dr. Anders Aufderhorst-Roberts

“More often than not, when a material encounters a change in shear environment, this coincides directly with change in chemical environment. But commercial rheometers cannot control shear and chemistry simultaneously and this represents an obvious blindspot when understanding the processing of soft structured materials and their end use applications. It’s also integral to many biological processes.  
Rheodialysis is a new device that represents our shared vision to address this blindspot.  It’s a joint endeavour between my team, our collaborators at Durham University and our colleagues at NETZSCH. Rather than commercialising this device, we’re making it fully and freely available to all interested users. If you believe this might help you answer new research questions, we’d like to hear from you. Please get in touch below.”

Dr. Anders Aufderhorst-Roberts
Lecturer in Sustainable & Biological Materials at the Faculty of Science and Engineering at the University of Liverpool
Rheodialysis technology for NETZSCH Kinexus Herometer enables real-time chemical environment changes during soft material testing.
The liquid, and thus the ions, flows through either a peristaltic or syringe pump and is directed through the membrane into the sample, where the ions diffuse through the latter. This enables a change in the chemistry of the sample in real time during rheological characterization without the sample being physically damaged by the flow of liquid.
The Rheodialysis approach: (a) A rheometer is equipped with a custom designed flow cell incorporating a porous membrane to allow buffer exchange of sample during rheological testing. (b) Among other uses (see below) this can be used to induce and probe gelation in-situ. (c) Pilot data of a model biopolymer solution that forms a gel during Ionic buffer exchange under oscillatory testing. Convergence of the oscillatory phase angles (yellow star) at different frequencies identifies the precise point of gelation.

Why Choose Rheodialysis for NETZSCH Kinexus?

Almost all soft materials ‒ biological or industrial ‒ are highly sensitive to mechanical StressStress is defined as a level of force applied on a sample with a well-defined cross section. (Stress = force/area). Samples having a circular or rectangular cross section can be compressed or stretched. Elastic materials like rubber can be stretched up to 5 to 10 times their original length.stress and their chemical surroundings. This rheology system uniquely enables you to:

Take a look at our white paper if you would like to learn more about the Rheodialysis Approach:

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Join us in advancing open-source Rheodialysis!

Collaborate, contribute ideas, and help shape the future of this accessible research accessory.

Get in touch

Key Benefits of Rheodialysis

Rheodialysis: An Experimental Platform for Changing a Sample’s Chemical Environment during Rheological Testing

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In this webinar we will present the rheodialysis technique, which extends the capabilities of standard rheology by incorporating a customised flow cell with a porous membrane into a parallel plate rheometer. This approach allows a sample’s chemical environment to be exchanged, while simultaneously probing its mechanical properties.

Cutting-Edge Applications for Rheodialysis Technology

Why should you decide for a NETZSCH Kinexus Shear Rheometer?

FeatureBenefit
Modular, open design with easy sample accessEffortless cartridge swapping with dedicated rheology accessory ensures quick transitions between tests
Optimized rheology accessory fit for Kinexus onlyEliminates adaptation challenges, guaranteeing precise chemical-mechanical coupling measurements
Proprietary rSpace software controls automationSynchronizes chemical environment changes and rheological measurements for streamlined experiments
High sensitivity and dual-action shear and axial testingEnables comprehensive investigation of complex fluids, soft solids, and dispersions

Contact Us to Learn More

Discover how rheodialysis technology for your NETZSCH Kinexus rheometer can revolutionize your rheological testing of chemically sensitive soft materials. Discuss custom applications for pharmaceutical, healthcare, food, and material science innovations with our experts!

Hands typing on a laptop keyboard, highlighting a focused work environment for research and analysis in materials science.

Join us in advancing open-source Rheodialysis!

Collaborate, contribute ideas, and help shape the future of this accessible research accessory.

Get in touch

FAQs about the NETZSCH Rheometer Service

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