Perfluoropolyether-based oleophobic additives: Influence of molecular weight distribution on wettability of polyethylene terephthalate films

Caliskan T., Wei L., Luzinov I.

JOURNAL OF FLUORINE CHEMISTRY, vol.244, 2021 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 244
  • Publication Date: 2021
  • Doi Number: 10.1016/j.jfluchem.2021.109747
  • Journal Name: JOURNAL OF FLUORINE CHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aquatic Science & Fisheries Abstracts (ASFA), Biotechnology Research Abstracts, Chemical Abstracts Core
  • Keywords: Oil repellency, Water repellency, Polyethylene terephthalate, Perfluoropolyether, Hydrophobicity, Oleophobicity, SURFACE FREE-ENERGY, POLY(METHYL METHACRYLATE), PERFLUOROALKYL ACIDS, PHASE SEGREGATION, POLYSTYRENE, BLENDS, WATER, TEMPERATURE, PERFORMANCE, COPOLYMERS
  • Ankara University Affiliated: Yes

Abstract

Fluorinated oligomeric polyester (FOP) with significantly different molecular weight distributions were synthesized for use as surface-active additives to alter the wettability of polyester films. Specifically, FOPs had different weight average molecular weight (M-W) of 5.4 and 10 kDA. The addition of FOPs in polyethylene terephthalate (PET) in different concentrations results in reducing the surface energy of PET/FOPs films. The PET/FOP film surfaces enriched with FOPs exhibited high water and oil repellency. It is found that not only concentration of FOPs in blends but also their M-W influences wettability of PET/FOP film surfaces. The highest values of water and oil repellency were obtained when we used either low concentrations of low M-W fluorinated polyesters that migrated to the surface easily, thus higher surface coverage were obtained, or high concentrations of higher M-W polyesters in the blends.