Abstract
The effective removal of ionic pollutants from contaminated water using negatively charged nanofiltration membranes is demonstrated. Block copolymers comprising polystyrene (PS) and partially hydrogenated polyisoprene (hPI) were synthesized by varying chain architectures. A one step procedure of cross-linking (hPI blocks) and sulfonation reactions (PS chains) was then carried out, which was revealed as an effective method to enhance mechanical integrity of membranes while hydrophilic sulfonated chains remain intact. In particular, the control of chain architecture allows us to create a synergetic effect on optimizing charge densities of the membrane, water permeability, and mechanical integrity under water purification conditions. The best performing membrane can almost completely (>99%) reject various divalent cations and also show NO 3 rejection >85% and Na + rejection >87%. Well defined nanostructures (tens of nanometers) as well as the periodically arranged water domains (a few nanometers) within hydrophilic phases of the hydrated membranes were confirmed by in situ neutron scattering experiments.
| Original language | English |
|---|---|
| Article number | 245703 |
| Journal | Nanotechnology |
| Volume | 23 |
| Issue number | 24 |
| DOIs | |
| Publication status | Published - 2012 Jun 22 |
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All Science Journal Classification (ASJC) codes
- Bioengineering
- Chemistry(all)
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering
- Electrical and Electronic Engineering
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Mechanically and structurally robust sulfonated block copolymer membranes for water purification applications. / Yeo, J.; Kim, S. Y.; Kim, S.; Ryu, Du Yeol; Kim, T. H.; Park, M. J.
In: Nanotechnology, Vol. 23, No. 24, 245703, 22.06.2012.Research output: Contribution to journal › Article
TY - JOUR
T1 - Mechanically and structurally robust sulfonated block copolymer membranes for water purification applications
AU - Yeo, J.
AU - Kim, S. Y.
AU - Kim, S.
AU - Ryu, Du Yeol
AU - Kim, T. H.
AU - Park, M. J.
PY - 2012/6/22
Y1 - 2012/6/22
N2 - The effective removal of ionic pollutants from contaminated water using negatively charged nanofiltration membranes is demonstrated. Block copolymers comprising polystyrene (PS) and partially hydrogenated polyisoprene (hPI) were synthesized by varying chain architectures. A one step procedure of cross-linking (hPI blocks) and sulfonation reactions (PS chains) was then carried out, which was revealed as an effective method to enhance mechanical integrity of membranes while hydrophilic sulfonated chains remain intact. In particular, the control of chain architecture allows us to create a synergetic effect on optimizing charge densities of the membrane, water permeability, and mechanical integrity under water purification conditions. The best performing membrane can almost completely (>99%) reject various divalent cations and also show NO 3 rejection >85% and Na + rejection >87%. Well defined nanostructures (tens of nanometers) as well as the periodically arranged water domains (a few nanometers) within hydrophilic phases of the hydrated membranes were confirmed by in situ neutron scattering experiments.
AB - The effective removal of ionic pollutants from contaminated water using negatively charged nanofiltration membranes is demonstrated. Block copolymers comprising polystyrene (PS) and partially hydrogenated polyisoprene (hPI) were synthesized by varying chain architectures. A one step procedure of cross-linking (hPI blocks) and sulfonation reactions (PS chains) was then carried out, which was revealed as an effective method to enhance mechanical integrity of membranes while hydrophilic sulfonated chains remain intact. In particular, the control of chain architecture allows us to create a synergetic effect on optimizing charge densities of the membrane, water permeability, and mechanical integrity under water purification conditions. The best performing membrane can almost completely (>99%) reject various divalent cations and also show NO 3 rejection >85% and Na + rejection >87%. Well defined nanostructures (tens of nanometers) as well as the periodically arranged water domains (a few nanometers) within hydrophilic phases of the hydrated membranes were confirmed by in situ neutron scattering experiments.
UR - http://www.scopus.com/inward/record.url?scp=84861591477&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84861591477&partnerID=8YFLogxK
U2 - 10.1088/0957-4484/23/24/245703
DO - 10.1088/0957-4484/23/24/245703
M3 - Article
C2 - 22641347
AN - SCOPUS:84861591477
VL - 23
JO - Nanotechnology
JF - Nanotechnology
SN - 0957-4484
IS - 24
M1 - 245703
ER -