| Autor: |
Korolkov IV; L.N.Gumilyov Eurasian National University, Satpaev str., Nur-Sultan 010008, Kazakhstan.; The Institute of Nuclear Physics, Ibragimov str., Almaty 050032, Kazakhstan., Kuandykova A; L.N.Gumilyov Eurasian National University, Satpaev str., Nur-Sultan 010008, Kazakhstan., Yeszhanov AB; L.N.Gumilyov Eurasian National University, Satpaev str., Nur-Sultan 010008, Kazakhstan.; The Institute of Nuclear Physics, Ibragimov str., Almaty 050032, Kazakhstan., Güven O; Department of Chemistry, Hacettepe University, Beytepe, 06800 Ankara, Turkey., Gorin YG; L.N.Gumilyov Eurasian National University, Satpaev str., Nur-Sultan 010008, Kazakhstan.; The Institute of Nuclear Physics, Ibragimov str., Almaty 050032, Kazakhstan., Zdorovets MV; L.N.Gumilyov Eurasian National University, Satpaev str., Nur-Sultan 010008, Kazakhstan.; The Institute of Nuclear Physics, Ibragimov str., Almaty 050032, Kazakhstan.; Ural Federal University, Mira str. 19, 620002 Ekaterinburg, Russia. |
| Abstrakt: |
The paper describes desalination by membrane distillation (MD) using ion-track membranes. Poly(ethylene terephthalate) (PET) ion-track membranes were hydrophobized by the immobilization of hydrophobic vinyl-silica nanoparticles (Si NPs). Si NPs were synthesized by the sol-gel method, and the addition of the surfactant led to the formation of NPs with average size of 40 nm. The thermal initiator fixed to the surface of membranes allowed attachment of triethoxyvinyl silane Si NPs at the membrane surface. To further increase hydrophobicity, ethoxy groups were fluorinated. The morphology and chemical structure of prepared membranes were characterized by SEM, FTIR, XPS spectroscopy, and a gas permeability test. Hydrophobic properties were evaluated by contact angle (CA) and liquid entry pressure (LEP) measurements. Membranes with CA 125-143° were tested in direct contact membrane distillation (DCMD) of 30 g/L saline solution. Membranes showed water fluxes from 2.2 to 15.4 kg/(m 2 ·h) with salt rejection values of 93-99%. |
