Menü

ELECTROKINETICS

Dr. Alla Synytska

Group leader Electrokinetics
at the Leibniz-Institut für Polymerforschung Dresden e.V.

Hohe Strasse 6
01069 Dresden
Phone: +49 (0)351 4658-327
Fax: +49 (0)351 4658-474
Email: synytska@ipfdd.de

 

 

Group members

  • Dr. Astrid Drechsler
  • Kathrin Estel
  • Anja Caspari
  • Cornelia Krause
  • Martina Priebs

Research topics

In the focus of the studies of our group is the deep understanding of interfacial properties and phenomena such as adhesion, cohesion (in composites and multi-component polymeric systems), wetting and adsorption processes (processes of contamination as well as cleaning). Therefore we use structural and functional characterization of surfaces / interfaces, which combines spectroscopic with physico-chemical methods, with the focus on electrokinetics. 

Our team wants to make a contribution to theory and methods of characterization of solid surfaces in combination with other physico-chemical methods (XPS, AFM, wetting, topography etc.).

With the help of electrokinetic methods investigations of charge building processes at interfaces such as primary dissociation and adsorption processes are carried out.

Furthermore, with our research work we want to open up new fields of application for electrokinetics such as investigation of adsorption, swelling, and other processes, and we want to expand the opportunities of electrokinetic methods in cooperation with equipment manufacturers.

Equipment

Electrokinetic Set-Up (Zetascience)

technical specifications:
- streaming potential
- streaming current
- max. pressure: 1000 mbar
- pH range: 2 to 12
- electrodes: Ag/ AgCl

sample requirements:
- fibres
- plates / foils from 10x20 mm, ø 26 mm

SurPASS (ANTON PAAR GmbH/Graz/A)

technical specifications:
- streaming potential: - 2000 to +2000 mV
- streaming current: -200 to +200 µA
- max. pressure: 1000 mbar
- pH range: 2 to 12
- electrodes: Ag/ AgCl

sample requirements:
- fibres
- powders > 25 µm
- plates / foils from 10x20 mm

EKA (ANTON PAAR GmbH/Graz/A)

technical specifications:
- streaming potential: -2000 to +2000 mV
- max. pressure: 1000 mbar
- pH range: 2 to 12
- electrodes: Ag/ AgCl, Pt, Pd

sample requirements:
- fibres
- membranes from 2 µm pore size
- powders > 25 µm
- plates / foils from 10x20 mm, ø 26 mm
- contact lenses

DT 1200
(Dispersion Technology, Inc./Bedford Hills/USA)

technical specifications:
- measurement technique: colloidal vibration current

sample requirements:
- suspensions
- size range: < 100 µm
- solid concentration: 0,1 to 50 vol%

Zetasizer nano ZS
(MALVERN Instruments Ltd./Malvern/GB)

technical  specifications:
- Laser: 633 nm He-Ne-Laser
- measurement technique: M3 - PALS (Phase Analysis Light Scattering)

sample requirements:
- suspensions
- size range: 5 nm to 10 µm
- minimum sample volume: 1 mL, for pH-dependence 50 mL
- solid concentration: < 10 vol%

Zetasizer 3000
(MALVERN Instruments Ltd./Malvern/GB)

technical specifications:
- 633 nm He-Ne-laser

sample requirements:
- suspensions
- size range: 10 nm to 30 µm
- min. volume: 10 mL, for pH-dependence 50mL
- solid concentration: < 1 vol%

Projects

  • DFG: Fundamentals of design of the interface between polymer fibers and cement-based matrices. In cooperation with Institut für Baustoffe (ifb), TU-Dresden (05/2016 – 04/2018)
  • AiF-IGF: Improvement of adhesion properties of PP exterior automotive parts by determination the influence of additives in cooperation with Fraunhofer-IPA Stuttgart and FILK (10/2016 - 03/2019)

Collaborations

  • Fraunhofer IVV, Dresden
  • Fraunhofer IPMS, Dresden
  • Fraunhofer IPA, Stuttgart
  • Leibniz-IFW, Dresden
  • FILK, Freiberg
  • TU-Dresden
  • DFO, Neuss
  • FEW Chemicals GmbH, Wolfen
  • A. Paar GmbH, Graz, Austria
  • DataPhysiks Instruments GmbH, Filderstadt
  • BBraun Avitum Saxonia Dresden
  • BSH Haushaltgeräte GmbH, Dillingen
  • Maschinenfabrik Reinhausen GmbH, Regensburg
  • Saint-Gobain, European Adfors Lab, Aubervilliers Cedex, France

5 important publications

  • Sobolkina, A. ; Mechtcherine, V. ; Bergold, S. ; Neubauer, J. ; Bellmann, C. ; Khavrus, V. ; Oswald, S. ; Leonhardt, A. ; Reschetilowski, W.; Journal of the American Ceramic Society 2016, 99, 2181-2196.
  • Sobolkina, A. ; Mechtcherine, V. ; Bellmann, C. ; Khavrus, V. ; Oswald, S. ; Hampel, S. ; Leonhardt, A.; Journal of Colloid and Interface Science 2014, 413, 43-53.
  • Bellmann, C. ; Synytska, A. ; Caspari, A. ; Drechsler, A. ; Grundke, K.; Journal of Colloid and Interface Science 2007, 309, 225-230.
  • Tkachenko, N.H. ; Yaremko, Z.M. ; Bellmann, C. ; Soltys, M.M.; Journal of Colloid and Interface Science 2006, 299, 686-695.
  • Yang, J. ; Grundke, K. ; Bellmann, C. ; Michel, S. ; Kostiuk, L.W. ; Kwok, D.Y.; Journal of Physical Chemistry B 2004, 108, 2103-2110.