TY - JOUR
T1 - Vapor-phase crosslinked mixed matrix membranes with UiO-66-NH2 for organic solvent nanofiltration
AU - Gao, Zhuo Fan
AU - Feng, Yingnan
AU - Ma, Dangchen
AU - Chung, Tai Shung
N1 - Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2019/3/15
Y1 - 2019/3/15
N2 - In this work, a series of mixed matrix membranes (MMMs) containing nano-size amine-functionalized UiO-66 particles were vapor-phase crosslinked by tris (3-aminopropyl) amine (TAPA) and investigated for organic solvent nanofiltration (OSN) applications. A thin dense layer was successfully formed on top of MMMs which improved solute selectivity in isopropanol (IPA). By manipulating (1) the size and loading of UiO-66-NH2 nanoparticles in dope solutions, and (2) the temperature and duration of the TAPA vapor crosslinking reaction, we have fabricated a membrane with a 99.2% rejection towards negatively charged Rose Bengal (RB, Mw= 1017 gmol−1) in IPA and a pure IPA flux of 11.5 Lm−2 h−1 at 10 bar. Interestingly, the optimal composite membrane developed in this study shows impressive rejections towards positively charged dyes possibly because of electrostatic repulsion (e.g., Donnan exclusion). In addition, the optimized TAPA vapor-phase crosslinked MMMs display stable performance in various organic solvents and the 14-day rejection test. To our best knowledge, this is the first report on organic solvent nanofiltration MMMs made from the vapor-phase crosslinking modification. This modification method may have great potential to develop next-generation OSN membranes for the separation of organic solvents and solutes in pharmaceutical and food industries.
AB - In this work, a series of mixed matrix membranes (MMMs) containing nano-size amine-functionalized UiO-66 particles were vapor-phase crosslinked by tris (3-aminopropyl) amine (TAPA) and investigated for organic solvent nanofiltration (OSN) applications. A thin dense layer was successfully formed on top of MMMs which improved solute selectivity in isopropanol (IPA). By manipulating (1) the size and loading of UiO-66-NH2 nanoparticles in dope solutions, and (2) the temperature and duration of the TAPA vapor crosslinking reaction, we have fabricated a membrane with a 99.2% rejection towards negatively charged Rose Bengal (RB, Mw= 1017 gmol−1) in IPA and a pure IPA flux of 11.5 Lm−2 h−1 at 10 bar. Interestingly, the optimal composite membrane developed in this study shows impressive rejections towards positively charged dyes possibly because of electrostatic repulsion (e.g., Donnan exclusion). In addition, the optimized TAPA vapor-phase crosslinked MMMs display stable performance in various organic solvents and the 14-day rejection test. To our best knowledge, this is the first report on organic solvent nanofiltration MMMs made from the vapor-phase crosslinking modification. This modification method may have great potential to develop next-generation OSN membranes for the separation of organic solvents and solutes in pharmaceutical and food industries.
KW - Functionalized UiO-66
KW - Mixed matrix membrane (MMM)
KW - Organic solvent nanofiltration (OSN)
KW - Surface modification
KW - Vapor-phase crosslinking (VPC)
UR - http://www.scopus.com/inward/record.url?scp=85059128363&partnerID=8YFLogxK
U2 - 10.1016/j.memsci.2018.12.064
DO - 10.1016/j.memsci.2018.12.064
M3 - Article
AN - SCOPUS:85059128363
SN - 0376-7388
VL - 574
SP - 124
EP - 135
JO - Journal of Membrane Science
JF - Journal of Membrane Science
ER -