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Thermo-responsive draw solute for forward osmosis process; poly(ionic liquid) having lower critical solution temperature characteristics
| Content Provider | Semantic Scholar |
|---|---|
| Author | Ju, Changha Park, Chanhyuk Kim, Taehyung Kang, Shinwoo Kang, Hyo Chul |
| Copyright Year | 2019 |
| Abstract | We synthesized poly(4-vinylbenzyltributylammonium hexanesulfonate) (P[VBTBA][HS]), a poly(ionic liquid) that shows lower critical solution temperature (LCST), via the anion exchange reaction of poly(4-vinylbenzyltributylammonium chloride) (P[VBTBA][Cl]) with sodium hexanesulfonate in order to investigate its suitability as a draw solute for the forward osmosis (FO) process. P[VBTBA][Cl] was obtained by the free radical polymerization of (4-vinylbenzyltributylammonium chloride [VBTBA][Cl]) monomer acquired by the Menshutkin reaction. The FO performance and recovery properties of the synthesized materials were systematically investigated. For example, the LCST of P[VBTBA][HS] was observed to be ∼17 °C at 20 wt%, while no LCST was observed for [VBTBA][Cl] monomer and P[VBTBA][Cl] polymer before the anion exchange reaction, indicating that P[VBTBA][HS] can be recovered from the aqueous solution by heating it to above its LCST. Moreover, in an active layer facing the feed solution (AL-FS) system containing 20 wt% aqueous P[VBTBA][HS] solution at 15 °C, the water flux and reverse solute flux of P[VBTBA][HS] were found to be ∼5.85 L m−2 h−1 and 1.13 g m−2 h−1, respectively. Therefore, we studied the feasibility of using the poly(ionic liquid), a homopolymer having LCST characteristics, as a draw solute in the FO process. |
| Starting Page | 29493 |
| Ending Page | 29501 |
| Page Count | 9 |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/c9ra04020j |
| Alternate Webpage(s) | https://pubs.rsc.org/en/content/articlepdf/2019/ra/c9ra04020j?page=search |
| Alternate Webpage(s) | https://pubs.rsc.org/en/content/articlepdf/2019/ra/c9ra04020j |
| Alternate Webpage(s) | https://doi.org/10.1039/c9ra04020j |
| Volume Number | 9 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
