TY - JOUR
T1 - State of water in hybrid sulfonated poly(ether ether ketone) - silica membranes by 1H solid-state NMR
AU - Baias, Maria
AU - Demco, Dan E.
AU - Blümich, Bernhard
AU - Möller, Martin
N1 - Funding Information:
The authors thank Dr. I. Colicchio for samples preparation. The useful discussions with Dr. Xiaomin Zhu and Dr. Rostislav Vinokur are gratefully acknowledged. D.E.D. gratefully acknowledges the support of Romanian Ministry of Education and Research under Project PN II, ID-1102.
PY - 2009/4/29
Y1 - 2009/4/29
N2 - The state of water in fully hydrated sulfonated poly(ether ether ketone) - silica hybrid proton exchange membranes were characterized in terms of the exchange rate between bound and free water, the water dynamics in each phase, and the relative water populations by 1H ODESSA and transverse magnetization relaxation NMR. The exchange rate, the amount of bound water, and the reorientation of free water molecules increase in the presence of silica particles. The dynamics of bound water was described by the Lévy statistics with a Cauchy propagator. The proton exchange membranes performances could be improved by addition of small concentrations of silica in the range of 5-10 wt.%.
AB - The state of water in fully hydrated sulfonated poly(ether ether ketone) - silica hybrid proton exchange membranes were characterized in terms of the exchange rate between bound and free water, the water dynamics in each phase, and the relative water populations by 1H ODESSA and transverse magnetization relaxation NMR. The exchange rate, the amount of bound water, and the reorientation of free water molecules increase in the presence of silica particles. The dynamics of bound water was described by the Lévy statistics with a Cauchy propagator. The proton exchange membranes performances could be improved by addition of small concentrations of silica in the range of 5-10 wt.%.
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U2 - 10.1016/j.cplett.2009.03.063
DO - 10.1016/j.cplett.2009.03.063
M3 - Article
AN - SCOPUS:64649098409
SN - 0009-2614
VL - 473
SP - 142
EP - 145
JO - Chemical Physics Letters
JF - Chemical Physics Letters
IS - 1-3
ER -