Abstract
Nanocomposite polyetherimide/TiO2-sulfonated polymer membranes were fabricated by phase inversion process, using Dimethylacetamide as solvent. The sulfonated polymers such as sulfonated poly(ether ether ketone) (SPEEK) and sulfonated polyethersulfone (SPES) self-assemble with TiO2 to form resultant hybrid PEI membranes. Such hybrid membranes were characterized by attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy, contact angle, scanning electron microscopy (SEM) and LCR meter. Among these membranes, TiO2-SPEEK incorporated PEI membrane shows a higher flux of 44.75L/m2h and lesser contact angle value of 61.38°. It is observed that such combination improves the membrane surface functionality. In addition, the filtration of three different electrolytes (NaCl, Na2SO4 and MgSO4) with varying concentrations from 50 to 500mg/L on resulted membranes was analyzed. It is inferred that an increasing dielectric constant value increased the salt rejection in such membranes. Also, a higher retention coefficient of 0.72 was observed during filtration of Na2SO4 using PEI/SPEEK/TiO2 membrane. Effects of ground water on flux profile and flux reduction ratio in the fabricated membrane were also analyzed and discussions are provided.
Original language | English |
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Pages (from-to) | 355-364 |
Number of pages | 10 |
Journal | Desalination |
Volume | 365 |
DOIs | |
State | Published - 1 Jun 2015 |
Externally published | Yes |
Keywords
- Electrolytes
- Ground water
- Low transmembrane pressure
- Polyetherimide
- Sulfonated polymer
- TiO