Adsorption of Pluronic F-127 on Surfaces with Different Hydrophobicities Probed by Quartz Crystal Microbalance with Dissipation

M.R. Nejadnik, A.L.J. Olsson, P.K. Sharma, H.C. van der Mei, W. Norde, H.J. Busscher

Research output: Contribution to journalArticleAcademicpeer-review

79 Citations (Scopus)

Abstract

Triblock copolymers of polyethylene oxide (PEO) and polypropylene oxide (PPO), that is, PEOn-PPOm-PEOn, better known as Pluronic can adsorb to surfaces in either a pancake or a brushlike configuration. The brushlike configuration is advantageous in numerous applications, since it constitutes a surface repellent to proteins and microorganisms. The conformation of the adsorbed Pluronic layer depends on the hydrophobicity of the substratum surface, but the hydrophobicity threshold above which a brushlike conformation is adopted is unknown. Therefore, the aim of this study is to investigate Pluronic F-127 adsorption on surfaces with different hydrophobicities using a quartz crystal microbalance with dissipation. Adsorption in a brushlike conformation occurred on surfaces with a water contact angle above 80 degrees, as inferred from the thickness, viscosity, and elasticity of the adsorbed layer. The concentration of Pluronic F-127 in solution affected only the kinetics of adsorption and not the final layer thickness or conformation of adsorbed Pluronic molecules.
Original languageEnglish
Pages (from-to)6245-6249
JournalLangmuir
Volume25
Issue number11
DOIs
Publication statusPublished - 2009

Keywords

  • protein adsorption
  • vesicle adsorption
  • adhesion
  • copolymers
  • brushes
  • temperature
  • surfactants
  • dependence
  • kinetics
  • systems

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