NanoOnSpect tackles a major challenge in Polymer NanoComposite compounding

Picture above: NanoOnSpect partners during the General Assembly Meeting at Aimplas, Valencia, March 2012 (PresseBox) (Pfinztal, ) There are two main challenges in the production of polymer nanocomposites. The first challenge is related to the production and compatibilisation of nanoparticles. The second challenge, which is addressed by the NanoOnSpect project, is to disperse the nanoparticles in a polymer matrix in the appropriate way.

To ensure a effective dispersion of nanoparticles, many processing variables must be monitored, for example residence time, liquid viscosity, local temperatures and pressure gradients as well as elongational stresses. Therefore it is not surprising that a sophisticated control system is required to govern such a multivariate process.

The most effective system to solve multivariate control problems in real time is termed Artificial Neural Network (ANN). An ANN mimics the mechanism operating in the human brain where uncountable mapped connections, to and from, biological neurons allow for retrieval of the most appropriate response to sensory stimuli. In NanoOnSpect ANN specialists are committed working to develop an expert system able to continuously generate the most appropriate operative response based on the selected signals emanating from the compounding process, on line.

Where conventional characterization methods are used, in which the nanocomposite is only characterized after the compounding step (for example using transmission electron microscopy and material testing), the finetuning of the compounding process becomes a laborious process of trial and error.

Furthermore, the dispersion process is very sensitive to process conditions, such as pressure, local shear stresses and other parameters, and it is difficult to produce nanocomposites with consistant quality.

With specific sensor technology, it is possible to receive data on the dispersion status of the nanocompound during production, data which can allow direct adaptive control.

Publications on NanoOnSpect

Online Raman spectroscopy for determination of CNT concentration in polymer/CNTcomposite V. Guschin, W. et al. Chops 2012 conference

Twin-screw extrusion of MWCNT reinforced polycarbonate composites: Investigation of electrical and mechanical properties. Mack C. et al, Fraunhofer ICT NanoStruc 2012 Conference

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Fraunhofer Institut für Chemische Technologie ICT
Joseph-von-Fraunhoferstraße 7
D-76327 Pfinztal
Dr. Stefan Tröster
Das Fraunhofer-Institut für Chemische Technologie
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