Studying modified porous medical membranes by atomic force microscopy
Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki, Uchenye Zapiski Kazanskogo Universiteta. Seriya Fiziko-Matematicheskie Nauki, Tome 160 (2018) no. 1, pp. 81-88
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Polymeric membranes used in medicine and biotechnology, for example in hemodialysis and gas separation, and their modification have been studied. The object of the study is polysulfone porous membranes characterized by reproducible physical properties and well-controlled porosity. Modification of the membranes has been performed in a high-frequency electric discharge at low-pressure (18.4 Pa) in $\mathrm{Ar}$ and $\mathrm{CF}_4$ medium with an operating frequency of 13.56 MHz and a power of 1500 W. The morphology of the surface of porous polysulfone membranes before and after their treatment by low-temperature plasma has been studied by means of atomic-force microscopy. A Solver $\mathrm P47\mathrm H$ ($\mathrm{NT}$-$\mathrm{MDT}$) atomic force microscope with $\mathrm{NSG}20$-type cantilevers has been used in contact and semi-contact operating modes. The following differences in the structure and measured and analyzed phenomenological parameters of polysulfone membranes before and after plasma-based modification have been evolved: dependence of the RMS of roughness of the surface, amplitude of the heights, average arithmetic roughness on the scan scale. It has been revealed that the influence of a high-frequency plasma wave on polysulfone membranes smoothes its surface that indicates a decrease of surface porosity of these membranes and explains the decrease of water permeability and the subsequent increase of retention capacity. It has been shown that plasma treatment improves the hydrophilic surface properties of the internal surfaces of hollow fiber polysulfone membranes. Significant changes have been established in adhesion characteristics of a control set surfaces of polysulfone membranes and the modified ones.
Keywords:
polysulfone membranes, atomic force microscopy, porous membranes, hollow fibers, high-frequency low-pressure plasma.
@article{UZKU_2018_160_1_a7,
author = {O. A. Konovalova and A. R. Khajdarova and R. G. Ibragimov and M. Kh. Salakhov},
title = {Studying modified porous medical membranes by atomic force microscopy},
journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
pages = {81--88},
publisher = {mathdoc},
volume = {160},
number = {1},
year = {2018},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/UZKU_2018_160_1_a7/}
}
TY - JOUR AU - O. A. Konovalova AU - A. R. Khajdarova AU - R. G. Ibragimov AU - M. Kh. Salakhov TI - Studying modified porous medical membranes by atomic force microscopy JO - Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki PY - 2018 SP - 81 EP - 88 VL - 160 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/UZKU_2018_160_1_a7/ LA - ru ID - UZKU_2018_160_1_a7 ER -
%0 Journal Article %A O. A. Konovalova %A A. R. Khajdarova %A R. G. Ibragimov %A M. Kh. Salakhov %T Studying modified porous medical membranes by atomic force microscopy %J Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki %D 2018 %P 81-88 %V 160 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/UZKU_2018_160_1_a7/ %G ru %F UZKU_2018_160_1_a7
O. A. Konovalova; A. R. Khajdarova; R. G. Ibragimov; M. Kh. Salakhov. Studying modified porous medical membranes by atomic force microscopy. Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki, Uchenye Zapiski Kazanskogo Universiteta. Seriya Fiziko-Matematicheskie Nauki, Tome 160 (2018) no. 1, pp. 81-88. http://geodesic.mathdoc.fr/item/UZKU_2018_160_1_a7/