Patterned Hydrophilization of Nanoporous 1,2‐PB by Thiol‐ene Photochemistry

Anton Berthold, Kaushal Shashikant Sagar, Sokol Ndoni

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

We present an efficient method for functionalizing the large polymer–air interface of a gyroid nanoporous polymer. The hydrophilicity of nanoporous cross‐linked 1,2‐polybutadiene is tuned by thiol‐ene photo‐grafting of mercaptosuccinic acid or sodium 2‐mercaptoethanesulfonate. The reaction is monitored by FT‐IR, UV–Vis, contact angle, and gravimetry. Overall quantum yields are calculated for the two thiol‐ene “click” reactions in nano‐confinement, neatly revealing their chain‐like nature. Top–down photolithographic patterning is demonstrated, realizing hydrophilic nanoporous “corridors” exclusively hosting water. The presented approach can be relevant for many applications where, e.g., high control and contrast in hydrophilicity, chemical functionality or refractive index are needed.
Original languageEnglish
JournalMacromolecular Rapid Communications
Volume32
Issue number16
Pages (from-to)1259-1263
ISSN1022-1336
DOIs
Publication statusPublished - 2011

Keywords

  • Photo-initiated
  • Hydrophilic
  • Nanoporous
  • Thiol-ene

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