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Updated: May 30, 2026

Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application
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UV-curable low surface energy fluorinated polycarbonate-based polyurethane dispersion.

Hyeon-Deuk Hwang1, Hyun-Joong Kim

  • 1Lab. of Adhesion and Bio-Composites, Program in Environmental Materials Science, Seoul National University, Seoul 151-921, Republic of Korea.

Journal of Colloid and Interface Science
|July 27, 2011
PubMed
Summary

Synthesizing fluorinated polyurethane dispersions with perfluoropolyether (PFPE) created low surface energy films. Increased PFPE content enhanced hydrophobicity but reduced UV-curing efficiency and mechanical properties.

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Area of Science:

  • Materials Science
  • Polymer Chemistry

Background:

  • Polyurethane dispersions (PUDs) are versatile polymers with tunable properties.
  • Low surface energy materials are desirable for applications requiring water and oil repellency.

Purpose of the Study:

  • To synthesize UV-curable fluorinated polycarbonate-based polyurethane dispersions.
  • To investigate the impact of perfluoropolyether (PFPE) content on material properties.

Main Methods:

  • Incorporation of hydroxy-terminated PFPE into the soft segment of polyurethane.
  • Analysis of UV-curing behavior using photo-differential scanning calorimetry.
  • Measurement of surface free energy via contact angle analysis.
  • Characterization of surface composition using X-ray photoelectron spectroscopy.

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Main Results:

  • Increasing PFPE content led to a significant decrease in surface free energy, enhancing hydrophobicity.
  • PFPE enrichment at the surface was confirmed by X-ray photoelectron spectroscopy.
  • Higher PFPE content reduced UV-curing rate, final conversion, glass transition temperature, crosslink density, tensile strength, and surface hardness.
  • Refractive indices decreased with increasing fluorine content.

Conclusions:

  • PFPE incorporation effectively creates hydrophobic surfaces in UV-cured polyurethane films.
  • There is a trade-off between achieving low surface energy and maintaining optimal UV-curing performance and mechanical integrity.