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Patterned Hydrophilization of Nanoporous 1,2‐PB by Thiol‐ene Photochemistry
Author(s) -
Berthold Anton,
Sagar Kaushal,
Ndoni Sokol
Publication year - 2011
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201100243
Subject(s) - nanoporous , ene reaction , hydrophilization , materials science , polymer , superhydrophilicity , contact angle , gyroid , chemical engineering , thiol , polybutadiene , polymer chemistry , nanotechnology , photochemistry , chemistry , copolymer , organic chemistry , composite material , engineering
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.