The surface inhomogeneity of ion-exchange membranes by SEM and AFM data

Autor: V. I. Vasil’eva, N. A. Kranina, M. D. Malykhin, E. M. Akberova, A. V. Zhiltsova
Rok vydání: 2013
Předmět:
Zdroj: Journal of Surface Investigation. X-ray, Synchrotron and Neutron Techniques. 7:144-153
ISSN: 1819-7094
1027-4510
DOI: 10.1134/s1027451013010321
Popis: The surface structure (morphology and roughness) of different types of ion-exchange membranes is investigated via scanning electron microscopy and atomic-force microscopy. It is established that the distribution of ion-exchange regions on the surface of heterogeneous membranes exhibits a complex stochastic character; the sizes of these regions are 5–30 μm. The sizes of irregularities on the surface of homogeneous membranes do not exceed 1 μm. After the samples are subjected to conditioning and the effect of current and temperature, the sizes and portions of the conducting regions of the surface thereof become larger than those of commercial samples by 10–20%. The dependence of the surface microrelief on the membrane type and external factors (chemical conditioning, current, and temperature) is revealed for the first time. The minimum roughness factor corresponds to the surfaces of artificially homogenized and commercial samples of heterogeneous membranes, and the maximum quantities fr are obtained for membranes with pronounced surface reliefs after current and temperature effects.
Databáze: OpenAIRE
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