Zeta potencial PA 6

Translated title of the contribution: Zeta potential of PA 6

Robert Šoster*, Nika Veronovski, Lidija Tušek, Karin Stana Kleinschek, Simona Strnad, Volker Ribitsch

*Corresponding author for this work

Research output: Contribution to specialist publicationArticlepeer-review


This paper investigates electrokinetic properties of polyamide 6 in a form of (a) foil and (b) textile filament using two measurement cells. The streaming potential was measured and the zeta potential (ζ) as a function of the pH value of medium was determined. The reproducibility of measurements was determined with 10 samples of each material. The basic statistics regarding ζ at pH of 3 and 9 and isoelectric point (IEP) were determined. Furthermore, the wetting time in the electrolyte solution before the measurement and the mass of material in cylindrical cell were optimized. The measurements in 0.001 M KCl on both materials coincide with each other quite well in spite of different supermolecular and surface structure. The ζ-pH curves show the expected form. PA 6 is amphoteric due to presence of the amino and carboxyl groups. In the alkaline environment the carboxyl groups dissociate thus the ζ is negative (foil: (-32.9 ± 1.6) mV, filament: (-35.2 ± 2.0) mV at pH of 9). In the acid environment PA 6 shows a cationic nature due to the dissociation of the amino groups (foil: (24.5 ± 1.7) mV, filament: (15.1 ± 1.1) mV at pH of 3). The isoelectric point, where ζ is equal to 0, was found for foil at pH value of (4.7 ± 0.1) and for filament at (4.9 ± 0.1), respectively.

Translated title of the contributionZeta potential of PA 6
Original languageSlovenian
Number of pages6
Specialist publicationTekstilec
Publication statusPublished - 1 Nov 2003
Externally publishedYes


  • Electrokinetic properties
  • Filament
  • Foil
  • Polyamide 6
  • Streaming potential
  • Zeta potential

ASJC Scopus subject areas

  • Business and International Management
  • Business, Management and Accounting(all)
  • Polymers and Plastics
  • Industrial and Manufacturing Engineering


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