Chemical modification and characterization of poly(ethylene terephthalate) surfaces for collagen immobilization

Mioara Drobota, Zdenka Persin, Lidija Fras Zemljic, Tamilselvan Mohan, Karin Stana-Kleinschek, Ales Doliska, Matej Bracic, Volker Ribitsch, Valeria Harabagiu, Sergiu Coseri

Research output: Contribution to journalArticlepeer-review


The functionalization of poly(ethylene terephthalate) (PET) surface films by reactions with multifunctional amines such as triethylenetetramine (TETA), and tetraethylenepentamine (TEPA) was investigated. For the functionalization of PET films surface we used a new way of treatment, a "sandwich model". Physical-chemical properties of functionalized PET films were analysed. Qualitative and quantitative determination of the introduced amine groups were examined by means of Fourier Transform Infrared Attenuated Total Reflexion (FTIR - ATR), X-ray photoelectron spectroscopy (XPS), and potentiometric titration. Gained wetting properties were determined by using contact angle measurements and thoroughly analysed by acid-base approach. In addition, surface topography was investigated by atomic force microscopy (AFM). The amount of the introduced amino groups after TETA incorporation has been found to be two times higher as compared to TEPA. Wetting properties were significantly improved after aminolysis. Surface free energy was higher for PET - TETA treated film than that observed for PET - TEPA treated which is in accordance with titration results. The collagen immobilization onto PET treated films was evidenced by using AFM and subsequently by using XPS. [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)1786-1798
Number of pages13
JournalCentral European Journal of Chemistry
Issue number11
Publication statusPublished - 1 Nov 2013
Externally publishedYes


  • AFM
  • Aminolysis
  • Collagen immobilization
  • PET
  • Wettability

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry


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