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Fast photo‐switched wettability and color of surfaces coated with polymer brushes containing spiropyran
Author(s) -
Wang Dan,
Jiao Pengwei,
Wang Jianming,
Zhang Qiaolan,
Feng Lin,
Yang Zhenzhong
Publication year - 2011
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.36254
Subject(s) - spiropyran , photochromism , wetting , irradiation , contact angle , materials science , atom transfer radical polymerization , merocyanine , photochemistry , polymer , polymerization , polymer chemistry , visible spectrum , chemical engineering , chemistry , nanotechnology , composite material , optoelectronics , physics , nuclear physics , engineering
An intelligent photo‐responsive spiropyran (SP)‐contained surface that combines reversible wettability conversion with photochromic behavior was prepared on etched silicon substrates by atom transfer radical polymerization. The heterocyclic ring cleavage of SP moieties under UV irradiation leads to the change of the surface wettability and color. Water contact angle (CA) of the prepared surfaces change from 138.8° ± 1.3° to 42.7° ± 1.7° after 5 min under 365 nm UV irradiation and recover to its original state after 20 min of visible light irradiation, accompanied by the color change between yellowish and purple. To our knowledge, this result is the highest and fastest CA variation reported for surfaces containing SPs. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012