Abstract
Graft copolymers comprising poly(vinylidene fluoride-co-chlorotrifluoroethylene) backbone and poly(styrene sulfonic acid) side chains, i.e. P(VDF-co-CTFE)-g-PSSA were synthesized using atom transfer radical polymerization (ATRP) for composite nanofiltration (NF) membranes. Direct initiation of the secondary chlorinated site of CTFE units facilitates grafting of PSSA, as revealed by FT-IR spectroscopy. The successful "grafting from" method and the microphase-separated structure of the graft copolymer were confirmed by transmission electron microscopy (TEM). Wide angle X-ray scattering (WAXS) also showed the decrease in the crystallinity of P(VDF-co-CTFE) upon graft copolymerization. Composite NF membranes were prepared from P(VDF-co-CTFE)-g-PSSA as a top layer coated onto P(VDF-co-CTFE) ultrafiltration support membrane. Both the rejections and the flux of composite membranes increased with increasing PSSA concentration due to the increase in SO3H groups and membrane hydrophilicity, as supported by contact angle measurement. The rejections of NF membranes containing 47wt% of PSSA were 83% for Na2SO4 and 28% for NaCl, and the solution flux were 18 and 32 L/m2 hr, respectively, at 0.3 MPa pressure.
| Original language | English |
|---|---|
| Pages (from-to) | 1643-1648 |
| Number of pages | 6 |
| Journal | Polymers for Advanced Technologies |
| Volume | 19 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 2008 Dec 31 |
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All Science Journal Classification (ASJC) codes
- Polymers and Plastics
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Nanofiltration membranes based on poly(vinylidene fluoride-co-chlorotrifluoroethylene)-graft-poly(styrene sulfonic acid). / Koh, Joo Hwan; Kim, Yong Woo; Park, Jung Tae; Min, Byoung Ryui; Kim, Jong Hak.
In: Polymers for Advanced Technologies, Vol. 19, No. 11, 31.12.2008, p. 1643-1648.Research output: Contribution to journal › Article
TY - JOUR
T1 - Nanofiltration membranes based on poly(vinylidene fluoride-co-chlorotrifluoroethylene)-graft-poly(styrene sulfonic acid)
AU - Koh, Joo Hwan
AU - Kim, Yong Woo
AU - Park, Jung Tae
AU - Min, Byoung Ryui
AU - Kim, Jong Hak
PY - 2008/12/31
Y1 - 2008/12/31
N2 - Graft copolymers comprising poly(vinylidene fluoride-co-chlorotrifluoroethylene) backbone and poly(styrene sulfonic acid) side chains, i.e. P(VDF-co-CTFE)-g-PSSA were synthesized using atom transfer radical polymerization (ATRP) for composite nanofiltration (NF) membranes. Direct initiation of the secondary chlorinated site of CTFE units facilitates grafting of PSSA, as revealed by FT-IR spectroscopy. The successful "grafting from" method and the microphase-separated structure of the graft copolymer were confirmed by transmission electron microscopy (TEM). Wide angle X-ray scattering (WAXS) also showed the decrease in the crystallinity of P(VDF-co-CTFE) upon graft copolymerization. Composite NF membranes were prepared from P(VDF-co-CTFE)-g-PSSA as a top layer coated onto P(VDF-co-CTFE) ultrafiltration support membrane. Both the rejections and the flux of composite membranes increased with increasing PSSA concentration due to the increase in SO3H groups and membrane hydrophilicity, as supported by contact angle measurement. The rejections of NF membranes containing 47wt% of PSSA were 83% for Na2SO4 and 28% for NaCl, and the solution flux were 18 and 32 L/m2 hr, respectively, at 0.3 MPa pressure.
AB - Graft copolymers comprising poly(vinylidene fluoride-co-chlorotrifluoroethylene) backbone and poly(styrene sulfonic acid) side chains, i.e. P(VDF-co-CTFE)-g-PSSA were synthesized using atom transfer radical polymerization (ATRP) for composite nanofiltration (NF) membranes. Direct initiation of the secondary chlorinated site of CTFE units facilitates grafting of PSSA, as revealed by FT-IR spectroscopy. The successful "grafting from" method and the microphase-separated structure of the graft copolymer were confirmed by transmission electron microscopy (TEM). Wide angle X-ray scattering (WAXS) also showed the decrease in the crystallinity of P(VDF-co-CTFE) upon graft copolymerization. Composite NF membranes were prepared from P(VDF-co-CTFE)-g-PSSA as a top layer coated onto P(VDF-co-CTFE) ultrafiltration support membrane. Both the rejections and the flux of composite membranes increased with increasing PSSA concentration due to the increase in SO3H groups and membrane hydrophilicity, as supported by contact angle measurement. The rejections of NF membranes containing 47wt% of PSSA were 83% for Na2SO4 and 28% for NaCl, and the solution flux were 18 and 32 L/m2 hr, respectively, at 0.3 MPa pressure.
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U2 - 10.1002/pat.1182
DO - 10.1002/pat.1182
M3 - Article
AN - SCOPUS:58049117283
VL - 19
SP - 1643
EP - 1648
JO - Polymers for Advanced Technologies
JF - Polymers for Advanced Technologies
SN - 1042-7147
IS - 11
ER -