Formation and Antifouling Properties of Amphiphilic Coatings on Polypropylene Fibers

Kiran K. Goli, Orlando J. Rojas, Jan Genzer*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

44 Citations (Scopus)

Abstract

We describe the formation of amphiphilic polymeric assemblies via a three-step functionalization process applied to polypropylene (PP) nonwovens and to reference hydrophobic self-assembled n-octadecyltrichlorosiline.(ODTS) monolayer surfaces In the first step, denatured proteins (lysozyme or fibrinogen) are adsorbed Onto the hydrophobic PP or the ODTS surfaces, followed by cross linking With glutaraldehyde in the presence of sodium borohydride (NaBH4). The hydroxyl and amine functional groups of the proteins permit the attachment of initiator;molecules from which poly (2-hydroxyethyl methacrylate) (PHEMA). polymer grafts are grown directly through "grafting from atom transfer radical polymerization. The, terminal hydroxyls of HEMA's pendent groups are modified with fluorinating moieties of different Chain lengths, resulting in amphiphilic brushes. A palette of analytical tools, including ellipsometry, contact angle goniometry, Fourier transform infrared spectroscopy in the :attenuated total reflection mode, and X-ray,photoelectron, spectroscopy is employed to determine the changes in physicochemical properties of the functionalized surfaces after each modification step, Antifouling properties Of the :resultant, amphiphilic coatings on PP are analyzed by following the adsorption of fluorescein isothiocyanate-labeled bovine serum albumin as a model fouling protein. Our results suggest that amphiphilic :coatings suppress significantly adsorption, of proteins as compared with PP fibers or PP surfaces coated with PHEMA brushes The type Of fluorinated chain grafted to PHEMA allows modulation of the surface composition of the topmost layer of the amphiphilic coating and its antifouling, capability.

Original languageEnglish
Pages (from-to)3769-3779
Number of pages11
JournalBiomacromolecules
Volume13
Issue number11
DOIs
Publication statusPublished - Nov 2012
MoE publication typeA1 Journal article-refereed

Keywords

  • TRANSFER RADICAL POLYMERIZATION
  • INTERFACIAL CROSS-LINKING
  • PROTEIN ADSORPTION
  • SURFACE MODIFICATION
  • HYDROPHOBIC SURFACES
  • MICROPOROUS MEMBRANES
  • BLOCK-COPOLYMERS
  • WATER-INTERFACE
  • SOLID-SURFACES
  • METHACRYLATE

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