Counterion Condensation in Nafion

被引：53

作者：

Beers, Keith M. ^{[1
,3
]}

Hallinan, Daniel T., Jr. ^{[2
,3
]}

Wang, Xin ^{[2
]}

Pople, John A. ^{[4
]}

Balsara, Nitash P. ^{[1
,2
,3
]}

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA

[3] Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA

[4] Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA

来源：

MACROMOLECULES | 2011年 / 44卷 / 22期

关键词：

PERFLUOROSULFONIC ACID MEMBRANES; FUEL-CELLS; POLYELECTROLYTE SOLUTIONS; PERFLUORINATED MEMBRANES; POLYMER ELECTROLYTE; IONOMERIC MEMBRANES; SULFONIC-ACID; WATER; ION; TRANSPORT;

D O I：

10.1021/ma2015084

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Nafion(117) membranes in contact with acidic solutions were characterized by small-angle X-ray scattering and by acid solution uptake measurements. The principle of Donnan equilibrium was used to obtain independent estimates of the extent of counterion condensation in the membranes from the three experiments. The surprising conclusion of our study is that a large fraction of the protons in Nafion are in the condensed form when the membrane is immersed in pure water. Estimates of the fraction of condensed protons range from 72 to 98%.

引用

页码：8866 / 8870

页数：5

共 43 条

[1] A study of polyelectrolyte brushes formed from adsorption of amphiphilic diblock copolymers using the surface forces apparatus [J].

Balastre, M ;

Li, F ;

Schorr, P ;

Yang, JC ;

Mays, JW ;

Tirrell, MV .

MACROMOLECULES, 2002, 35 (25) :9480-9486

[2] Nafion® perfluorinated membranes in fuel cells [J].

Banerjee, S ;

Curtin, DE .

JOURNAL OF FLUORINE CHEMISTRY, 2004, 125 (08) :1211-1216

[3] FUNDAMENTAL PROPERTIES OF A SYNTHETIC CATION EXCHANGE RESIN [J].

BAUMAN, WC ;

EICHHORN, J .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1947, 69 (11) :2830-2836

[4] Theory of polyelectrolytes in solutions and at surfaces [J].

Dobrynin, AV ;

Rubinstein, M .

PROGRESS IN POLYMER SCIENCE, 2005, 30 (11) :1049-1118

[5] SCALING THEORY OF POLYELECTROLYTE SOLUTIONS [J].

DOBRYNIN, AV ;

COLBY, RH ;

RUBINSTEIN, M .

MACROMOLECULES, 1995, 28 (06) :1859-1871

[6] Relationship between ionic conductivity of perfluorinated ionomeric membranes and nonaqueous solvent properties [J].

Doyle, M ;

Lewittes, ME ;

Roelofs, MG ;

Perusich, SA ;

Lowrey, RE .

JOURNAL OF MEMBRANE SCIENCE, 2001, 184 (02) :257-273

[7] Complex impedance studies of proton-conducting membranes [J].

Edmondson, CA ;

Stallworth, PE ;

Chapman, ME ;

Fontanella, JJ ;

Wintersgill, MC ;

Chung, SH ;

Greenbaum, SG .

SOLID STATE IONICS, 2000, 135 (1-4) :419-423

[8] EXPERIMENTAL-DETERMINATION OF THE TRANSPORT NUMBER OF WATER IN NAFION-117 MEMBRANE [J].

FULLER, TF ;

NEWMAN, J .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1992, 139 (05) :1332-1337

[9] Thermodynamics of water vapor uptake in perfluorosulfonic acid membranes [J].

Futerko, P ;

Hsing, IM .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1999, 146 (06) :2049-2053

[10] Small-angle scattering study of water-swollen perfluorinated ionomer membranes [J].

Gebel, G ;

Lambard, J .

MACROMOLECULES, 1997, 30 (25) :7914-7920

← 1 2 3 4 5 →