Conformal Growth of Ultrathin Hydrophilic Coatings on Hydrophobic Surfaces Using Initiated Chemical Vapor Deposition

Shayna M. Rumrill, Vivek Agarwal, Kenneth K.S. Lau

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Hydrophilic poly(2-hydroxyethyl methacrylate) (PHEMA) was deposited onto hydrophobic polytetrafluoroethylene (PTFE) surfaces using initiated chemical vapor deposition. By tuning the reactor conditions, the reaction kinetics were varied to achieve a wide range of deposition rates that spanned over 2 orders of magnitude (0.1-10 nm/min). Depositions rates at >1 nm/min were successful in overcoming the interfacial energy and wettability barriers between the hydrophobic and hydrophilic polymers and were found to achieve both conformal and ultrathin coatings. PHEMA coatings as thin as 10 nm over PTFE were able to transform a hydrophobic surface with a water contact angle of 110° to a hydrophilic one with an angle of 20°.

Original languageEnglish (US)
Pages (from-to)7751-7759
Number of pages9
JournalLangmuir
Volume37
Issue number25
DOIs
StatePublished - Jun 29 2021
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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