Development of Novel ECTFE Coated PP Composite Hollow-Fiber Membranes
Santoro, S; Drioli, E; Figoli, A
| HERO ID | 3577497 |
|---|---|
| In Press | No |
| Year | 2016 |
| Title | Development of Novel ECTFE Coated PP Composite Hollow-Fiber Membranes |
| Authors | Santoro, S; Drioli, E; Figoli, A |
| Journal | Coatings |
| Volume | 6 |
| Issue | 3 |
| Abstract | In this work composite hollow-fibers were prepared by dip-coating of commercial polypropylene (PP) with a thin layer of ethylene-chlorotrifluoroethylene copolymer (ECTFE). The employment of N-methyl pyrrolidone (NMP) as solvent improved the polymer processability favoring dip-coating at lower temperature (135 degrees C). Scanning electron microscopy (SEM) analyses showed that after dip-coating the PP support maintained its microstructure, whereas a thin coated layer of ECTFE on the external surface of the PP hollow-fiber was clearly distinguishable. Membrane characterization evidenced the effects of the concentration of ECTFE in the dope-solution and the time of dip-coating on the thickness of ECTFE layer and membrane properties (i.e., contact angle and pore size). ECTFE coating decreased the surface roughness reducing, as a consequence, the hydrophobicity of the membrane. Moreover, increasing the ECTFE concentration and dip-coating time enabled the preparation of a thicker layer of ECTFE with low and narrow pore size that negatively affected the water transport. On the basis of the superior chemical resistance of ECTFE, ECTFE/PP composite hollow fibers could be considered as very promising candidates to be employed in membrane processes involving harsh conditions. |
| Doi | 10.3390/coatings6030040 |
| Wosid | WOS:000385525900016 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Journal:COATINGS 2079-6412 |
| Is Public | Yes |
| Keyword | composite membranes; hollow-fibers; dip-coating; ethylene-chlorotrifluoroethlyene; thermal induced phase separation technique (TIPS) |