Proton exchange in hybrid sulfonated poly(ether ether ketone)-silica membranes by 1H solid-state NMR

被引：12

作者：

Baias, Maria ^{[2
]}

Demco, Dan E. ^{[1
,3
]}

Colicchio, Irene ^{[1
]}

Bluemich, Bernhard ^{[2
]}

Moeller, Martin ^{[1
]}

机构：

[1] Rhein Westfal TH Aachen, Deutsches Wollforsch Inst, D-52056 Aachen, Germany

[2] Rhein Westfal TH Aachen, Inst Tech & Makromol Chem, D-52074 Aachen, Germany

[3] Tech Univ Cluj Napoca, Dept Phys, R-400020 Cluj Napoca, Romania

来源：

CHEMICAL PHYSICS LETTERS | 2008年 / 456卷 / 4-6期

关键词：

D O I：

10.1016/j.cplett.2008.03.048

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 [物理化学]; 081704 [应用化学];

摘要：

Enthalpy of activation for proton exchange processes in fully hydrated hybrid sulfonated poly( ether ether ketone)-silica (SPEEK/SiO2) membranes were measured from the H-1 NMR spectra under magic angle sample spinning (MAS). For the first time Eyring function is used for this purpose. Two exchange processes between different water pools were detected. The isotropic chemical shift of the H-1 spectrum allows us to obtain information about the normalized enthalpy of activation characterizing the water exchange. These results show that the proton exchange membranes performances could be improved by addition of small concentrations of silica in the range of 5-10 wt.%. (c) 2008 Elsevier B. V. All rights reserved.

引用

页码：227 / 230

页数：4

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