coatings containing different kinds of cationic, zwitterionic and anionic polyelectrolytes are still needed to investigate
systematically. In this work, antifogging/frost-resisting coatings with high transparence were developed from amphiphilic
copolymers of cationic, zwitterionic or anionic poly(2-(dimethylamino)ethyl methacrylate (DMAEMA)-co-
2,2,2-trifluoroethyl methacrylate (FMA))-b-polyelectrolytes with a small amount of ethylene glycol dimethacrylate
via UV-curing. Studies on the prepared amphiphilic coatings suggested that the cationic and zwitterionic coatings
exhibited superior antifogging properties, whereas the anionic polyelectrolyte-based coating demonstrated a better
frost-resisting behavior. Water molecule activities in the amphiphilic coatings were analyzed by differential scanning
calorimetry, Raman spectroscopy and low field nuclear magnetic resonance. It was found that the cationic and
zwitterionic coatings containing 2-(methacryloyloxy)-ethyltrimethyl ammonium chloride and sulfobetaine methacrylate,
respectively, exhibited stronger polymer-water interactions dominated by strong hydrogen bonds, and held
more nonfreezable water content with shorter transverse spin-spin relaxation time T2 than the anionic coating
containing 3-sulfopropyl methacrylate potassium (SPMA). Electrostatic interactions between anionic SPMA and
DMAEMA units in the copolymer could weaken the polymer-water interaction, leading to a compromise in the
antifogging performance and an enhancement of frost-resisting ability of the coating. The results of this study would
be applicable for exploring the advanced antifogging/frost-resisting coatings.


Shan Bai,Xiaohui Li,Rongchun Zhang,Chuan Li,Kongying Zhu,Pingchuan Sun,Yunhui Zhao,Lixia Ren,Xiaoyan Yuan.


Chemical Engineering Journal,357,667-677(2019)