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Synthesis and characterization of pH‐responsive mesoporous chitosan microspheres loaded with sodium phytate for smart water‐based coatings
Author(s) -
Liu Xiaojie,
Li Weihua,
Wang Wei,
Song Liying,
Fan Weijie,
Gao Xiang,
Xiong Chuansheng
Publication year - 2018
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.201709840
Subject(s) - chitosan , mesoporous material , dielectric spectroscopy , materials science , corrosion , chemical engineering , coating , sodium polyacrylate , corrosion inhibitor , sodium , nuclear chemistry , electrochemistry , composite material , chemistry , metallurgy , organic chemistry , electrode , raw material , engineering , catalysis
Mesoporous micro‐ or nanocontainers have been indicated to be potential carriers of corrosion inhibitors to modify water‐based coatings for self‐healing properties and excellent anti‐corrosion performance. In this work, the eco‐friendly mesoporous chitosan microspheres loaded with green corrosion inhibitor sodium phytate were incorporated in self‐healing water‐based polyacrylate coating. The microspheres with mesoporous surface, uniform size, and promising pH responsiveness were prepared via the water‐in‐oil (W/O) emulsion chemical cross‐linking method. On this basis, chitosan microspheres loaded with 25.79 wt% sodium phytate were obtained by negative pressure impregnation method and the pH‐responsive was demonstrated by the electrochemical impedance spectroscopy (EIS). The results of EIS and seawater immersion tests revealed that artificial defected water‐based polyacrylate coating containing 5 wt% chitosan microspheres showed high anti‐corrosion performance and exhibited self‐healing capabilities due to the release of corrosion inhibitor sodium phytate.