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Soft Lithographic Functionalization and Patterning Oxide-free Silicon and Germanium
12:38

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Toward the development of a versatile functionalized silicone coating.

A Evren Özçam1, Richard J Spontak, Jan Genzer

  • 1Department of Chemical & Biomolecular Engineering North Carolina State University Raleigh, North Carolina 27695-7905, United States.

ACS Applied Materials & Interfaces
|November 27, 2014
PubMed
Summary

Researchers developed a versatile silicone copolymer coating by chemically coupling trichlorosilane (TCS) to poly(vinylmethylsiloxane) (PVMS). This functional coating on poly(dimethylsiloxane) substrates allows tunable mechanical properties for diverse applications.

Keywords:
functional siliconepoly(dimethylsiloxane)poly(vinylmethylsiloxane)silicone elastomerthiol-enetrichlorosilane

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Surface Engineering

Background:

  • Poly(dimethylsiloxane) (PDMS) is a widely used elastomer with a hydrophobic surface.
  • Functional coatings are essential for modifying substrate properties and enabling new applications.
  • Controlling the mechanical properties of surface layers is crucial for advanced material design.

Purpose of the Study:

  • To develop a versatile silicone copolymer coating with tunable mechanical properties.
  • To functionalize hydrophobic PDMS substrates with a novel organic layer.
  • To demonstrate the adaptability of the coating through various case studies.

Main Methods:

  • Chemical coupling of trichlorosilane (TCS) to vinyl groups of poly(vinylmethylsiloxane) (PVMS).
  • Deposition of the resultant PVMS-TCS copolymer onto PDMS elastomer substrates.
  • Characterization using optical microscopy, FTIR spectroscopy, contact angle, ellipsometry, and nanoindentation.

Main Results:

  • A functional organic layer of PVMS-TCS copolymer was successfully deposited on PDMS.
  • The mechanical modulus of the coating could be precisely regulated by adjusting the TCS coupling ratio.
  • The versatile properties of the coatings were confirmed through multiple experimental analyses.

Conclusions:

  • The developed PVMS-TCS copolymer coating offers a versatile platform for modifying PDMS substrates.
  • Tunable mechanical properties make these coatings suitable for a range of applications.
  • The study highlights the effectiveness of chemical coupling for creating advanced functional materials.