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Photo and Humidity Responsive Mesoporous Poly(ionic Liquid) Membrane for Selective Dye Adsorption
Author(s) -
Wu Aoli,
Lu Fei,
Zhao Mingwei,
Sun Na,
Shi Lijuan,
Zheng Liqiang
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201601934
Subject(s) - membrane , mesoporous material , materials science , chemical engineering , adsorption , cationic polymerization , small angle x ray scattering , porosity , azobenzene , ionic liquid , humidity , swelling , triazine , ionic bonding , photoisomerization , polymer chemistry , scattering , chemistry , composite material , organic chemistry , catalysis , polymer , optics , ion , biochemistry , physics , isomerization , engineering , thermodynamics
Photo and humidity responsive mesoporous poly(ionic liquid) (PIL) membrane has been easily fabricated by a template‐free phase separation method. Due to the photoisomerization of azobenzene group, the porous structure of membrane can be manipulated by incident light. The pores can be switched “on” and “off” through humidity stimulus. Small‐angle X‐ray scattering (SAXS) measurement was performed to investigate the mechanism of porous formation and structure changes. Extremely high swelling and water uptake ratios and charged character endow the membrane excellent selective adsorption capability for cationic dye methylene blue (MB). Taking advantage of the structure changes in response to humidity and light, the porous membrane open a door to new fields for special applications.