Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 223-229 |
| Journal | Separation and purification technology |
| Volume | 169 |
| DOIs | |
| Publication status | Published - 2016 |
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Coupled-PDMS grafted mesoporous γ-alumina membranes for solvent nanofiltration. / Tanardi, Cheryl; Nijmeijer, Arian; Winnubst, Aloysius J.A.
In: Separation and purification technology, Vol. 169, 2016, p. 223-229.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - Coupled-PDMS grafted mesoporous γ-alumina membranes for solvent nanofiltration
AU - Tanardi, Cheryl
AU - Nijmeijer, Arian
AU - Winnubst, Aloysius J.A.
PY - 2016
Y1 - 2016
N2 - In this paper grafting of mesoporous c-alumina membranes with hydride terminated polydimethylsiloxane is described. Vinyltriethoxysilane is used as linking agent and tetrakis(vinyldimethylsiloxy)silane as a coupling agent, to create a dense network structure that is grafted in the ceramic pores. Grafting performance of the organic moieties on c-alumina powders was analyzed by FTIR and TGA. The results indicate that grafting reactions were successfully carried out. Contact angle analysis on the grafted membranes showed that grafting occurs on the c-alumina layer and that the resulting membrane surface had a water contact angle of 108 . From permeability and rejection tests using Sudan Black in toluene, ethyl acetate or isopropanol, the use of a coupling agent was found to result in a more dense network structure grafted in the gamma alumina pores. This resulted in a higher rejection for nanofiltration of solvents but at the cost of a lower solvent permeability, when compared with PDMS-grafted alumina membranes where no coupling of PDMS was applied.
AB - In this paper grafting of mesoporous c-alumina membranes with hydride terminated polydimethylsiloxane is described. Vinyltriethoxysilane is used as linking agent and tetrakis(vinyldimethylsiloxy)silane as a coupling agent, to create a dense network structure that is grafted in the ceramic pores. Grafting performance of the organic moieties on c-alumina powders was analyzed by FTIR and TGA. The results indicate that grafting reactions were successfully carried out. Contact angle analysis on the grafted membranes showed that grafting occurs on the c-alumina layer and that the resulting membrane surface had a water contact angle of 108 . From permeability and rejection tests using Sudan Black in toluene, ethyl acetate or isopropanol, the use of a coupling agent was found to result in a more dense network structure grafted in the gamma alumina pores. This resulted in a higher rejection for nanofiltration of solvents but at the cost of a lower solvent permeability, when compared with PDMS-grafted alumina membranes where no coupling of PDMS was applied.
U2 - 10.1016/j.seppur.2016.05.057
DO - 10.1016/j.seppur.2016.05.057
M3 - Article
VL - 169
SP - 223
EP - 229
JO - Separation and purification technology
JF - Separation and purification technology
SN - 1383-5866
ER -