| Autor: |
Gaina, Constantin, Gaina, Viorica, Ursache, Oana, Vasiliu, Lavinia |
| Zdroj: |
Polymer-Plastics Technology & Materials; 2023, Vol. 62 Issue 6, p712-721, 10p |
| Abstrakt: |
Novel membranes have been obtained from an aldehyde functionalized-polysulfone and poly(vinyl alcohol), in the presence of tetraethyl orthosilicate (TEOS) by a sol-gel method, and the effect of the amount of TEOS in the membrane formulations has been investigated. The characterization of the prepared membranes has been performed using attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR), scanning electron microscopy (SEM), thermal analysis (TGA and DSC), and by wide-angle X-ray diffraction measurements (XRD). Also, the hydrophilicity, the water/alcohol absorption, and permeability of membranes were studied. The novel membranes showed a much lower absorption of water/alcohol than the one without TEOS. The membrane containing 1% TEOS exhibited a porous structure that entailed a permeability toward both polar (water and alcohols like ethanol and butyl alcohol) and nonpolar solvents (toluene, benzene), compared to pristine membrane which is permeable only for nonpolar solvents. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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