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In Vitro and In Silico Studies of Functionalized Polyurethane Surfaces toward Understanding Biologically Relevant

Paulina Chytrosz-Wrobel1, Monika Golda-Cepa1, Kamil Drozdz2

  • 1Faculty of Chemistry, Jagiellonian University in Krakow, Gronostajowa 2, 30-387 Krakow, Poland.

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Summary
This summary is machine-generated.

Oxygen plasma treatment modifies polyurethane surfaces, enhancing biomaterial-host interactions for respiratory applications. This study details surface changes and their impact on cellular and bacterial adhesion.

Keywords:
bacteria adhesionbiocompatibilitymolecular dynamicsoxygen plasmapolyurethane

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Area of Science:

  • Biomaterials Science
  • Surface Chemistry
  • Polymer Science

Background:

  • The biomaterial-aqueous interface is crucial for implant-host interactions.
  • Understanding this interface is essential for developing effective biomaterials.
  • Polyurethane is a common biomaterial, but its surface properties require optimization for specific applications.

Purpose of the Study:

  • To investigate the effects of oxygen plasma treatment on polyurethane surfaces for respiratory applications.
  • To characterize the physicochemical and biological changes induced by plasma functionalization.
  • To elucidate the nanoscale behavior of the polyurethane-water interface using molecular dynamics simulations.

Main Methods:

  • Oxygen plasma treatment of polyurethane surfaces.
  • Surface characterization using atomic force microscopy, FTIR, DTA, XPS, SIMS, and contact angle measurements.
  • Biological evaluation with A549 cells, Staphylococcus aureus, and Pseudomonas aeruginosa.
  • Molecular dynamics simulations of unmodified and plasma-functionalized polyurethane-water interfaces.

Main Results:

  • Plasma treatment significantly altered the physicochemical properties of polyurethane surfaces.
  • Surface functionalization led to increased oxygen-containing groups, with a 20% substitution at chain termini.
  • Experimental surface free energies correlated well with simulation-derived values.
  • Biological tests indicated potential for improved implant-host interactions.

Conclusions:

  • Oxygen plasma functionalization is an effective method to modify polyurethane surfaces for biomedical applications.
  • The study provides a detailed nanoscale understanding of the plasma-treated polyurethane-water interface.
  • The findings support the use of functionalized polyurethane in respiratory system contact applications.