2024-03-29T11:57:43Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/614202016-02-17T13:15:53Zcom_10261_56com_10261_3col_10261_309
DIGITAL.CSIC
author
Guo, Xiaoxia
author
Zhai, Fengxia
author
Fang, Jianhua
author
Laguna, Maria Fe
author
López-González, Mar
author
Riande, Evaristo
funder
National Natural Science Foundation of China
funder
Comunidad de Madrid
funder
European Commission
funder
Dirección General de Investigación Científica y Técnica, DGICT (España)
2012-11-28T12:16:54Z
2012-11-28T12:16:54Z
2007
Journal of Physical Chemistry B 111 (49) : 13694–13702 (2007)
1520-6106
http://hdl.handle.net/10261/61420
10.1021/jp0734631
http://dx.doi.org/10.13039/501100001809http://dx.doi.org/10.13039/501100000780http://dx.doi.org/10.13039/100012818http://dx.doi.org/10.13039/501100008737
A series of sulfonated diamines were synthesized which were further used to obtain relevant sulfonated naphthalenic copolyimides. Tough and ductile membranes were cast from solutions of the copolyimides in dimethylsulfoxide, which exhibit high ion-exchange capacity and high water uptake. The protonic conductivity of the membranes equilibrated with water lies in the range 1.0−8.6 S/m, at 25 °C, being of the same order of magnitude as that reported for perfluorinated acidic membranes. The values of the transport number of protons and sodium ions are close to the unit for very dilute electrolyte solutions, but they lie in the range 0.80−0.90 for moderate concentrations. The membranes exhibit rather high electroosmotic permeability. The similarity of the diffusion coefficients of protons and water in the membranes suggests that the Grottus mechanism governs the protonic conductive process in the acidic membranes equilibrated with water.
eng
closedAccess
Permselectivity and conductivity of membranes based on sulfonated naphthalenic copolyimides
artículo
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URL
https://digital.csic.es/bitstream/10261/61420/1/accesoRestringido.pdf
File
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application/pdf
accesoRestringido.pdf
URL
https://digital.csic.es/bitstream/10261/61420/4/accesoRestringido.pdf.txt
File
MD5
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text/plain
accesoRestringido.pdf.txt