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In-line monitoring of carbon nanoparticle epoxy dispersion processes

Insights into the process via next generation three roll mills and impedance spectroscopy
  • H. MeeuwEmail author
  • V. K. Wisniewski
  • U. Köpke
  • A. S. Nia
  • A. R. Vázquez
  • M. R. Lohe
  • X. Feng
  • B. Fiedler
Production Process
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Abstract

The new generation of three roll mills is able to monitor occurring process loads while dispersion. This paper focuses on the interpretation of the gathered data to find criteria quantifying the dispersion state online. The aim is process time reduction. We used impedance spectroscopy to identify the dispersion state and correlated it with the occurring process loads. The dispersion process of a wide spectrum of carbon based nano particles, namely carbon black, single walled carbon nanotubes, multi walled carbon nanotubes, a few-layer graphene powder, electrochemically exfoliated graphite and a functionalized electrochemically exfoliated graphite was investigated. The filler content was varied along the material’s electrical percolation threshold. The criteria found led to a reduction of processing time and revealed the prevalent mechanisms during dispersion.

Keywords

Carbon nano particle Dispersion Three roll mill 
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Notes

Acknowledgements

The authors thank the German Research Foundation (DFG, project “Multifunktionale Komposite—Gedruckte Elektronik zur strukturintegrierten Zustandsüberwachung von Faser—Kunststoff—Verbunden”—Project number: 393868053) for financial support of this project. This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (Grant agreement number 785219 and 768930). Moreover, the authors are grateful to OCSiAl for providing the SWCNT. Special thanks go to Hexion for providing the epoxy resins.

Compliance with ethical standards

Conflict of interest

The authors declares that they have no conflict of interest.

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Copyright information

© German Academic Society for Production Engineering (WGP) 2019

Authors and Affiliations

  1. 1.Institute of Polymer and CompositesHamburg University of Technology (TUHH)HamburgGermany
  2. 2.EXAKT Advanced Technologies GmbHNorderstedtGermany
  3. 3.Center for Advancing Electronics Dresden (cfaed)Technische Universität DresdenDresdenGermany

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