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One‐Pot Synthesis of Chloromethylated Mesoporous Silica Nanoparticles as Multifunctional Fillers in Hybrid Anion Exchange Membranes
Author(s) -
He Xueyi,
Gang Mingyue,
He Guangwei,
Yin Yongheng,
Cao Li,
Wu Hong,
Jiang Zhongyi
Publication year - 2017
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201600577
Subject(s) - membrane , chemistry , thermal stability , chemical engineering , fourier transform infrared spectroscopy , polymer chemistry , nanoparticle , hydroxide , peek , ion exchange , bromide , mesoporous material , ammonium bromide , inorganic chemistry , organic chemistry , polymer , ion , catalysis , pulmonary surfactant , biochemistry , engineering
Chloromethylated mesoporous silica nanoparticles ( CM MSN ) were synthesized through co‐condensation of tetraethoxysilane and (chloro) phenyltrimethoxysilane precursors using hexadecyl trimethyl ammonium bromide as template. With the addition of the particles into chloromethylated poly (ether ether ketone) ( PEEK ), the hybrid membranes were prepared by a solution‐casting method after complete quaternization of the casting solution. The successful synthesis of the particles was verified by transmission electron microscopy, X‐ray diffraction and Fourier transform infrared spectroscopy while the effect of CM MSN incorporation on membrane performance including thermal stability, mechanical strength and hydroxide conductivity was investigated by thermal gravimetric analysis, electronic stretching machine, alternating‐current impedance and so on. Owing to the large pore volume and high surface area of the particles, the hybrid membranes exhibited enhanced hydroxide conductivity (88.7% increase at 60 °C, 100% RH with 5.0 wt% filling content) due to an increase in ion concentration and optimization of the channel morphology. Besides, higher mechanical strength, thermal and dimensional stability of hybrid membranes were obtained compared with those of the imidazolium PEEK membrane.