Cited Article: Holt JK. Fast mass transport through sub-2-nanometer carbon nanotubes
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AU Kaufman, Y
Berman, A
Freger, V
AF Kaufman, Yair
Berman, Amir
Freger, Viatcheslav
TI Supported Lipid Bilayer Membranes for Water Purification by Reverse
Osmosis
SO LANGMUIR
LA English
DT Article
ID ATOMIC-FORCE MICROSCOPY; QUARTZ-CRYSTAL MICROBALANCE; INTERFACIAL
POLYMERIZATION; NANOFILTRATION MEMBRANES; PHOSPHOLIPID-BILAYERS;
MOLECULAR-DYNAMICS; CARBON NANOTUBES; VESICLE FUSION; SURFACES; CHARGE
AB Some biological plasma membranes pass water with a permeability and
selectivity largely exceeding those of commercial membranes for water
desalination using specialized trans-membrane proteins aquaporins.
However, highly selective transport of water through aquaporins is
usually driven by an osmotic rather mechanical pressure, which is not
as attractive from the engineering point of view. The feasibility of
adopting biomimetic membranes for water purification driven by a
mechanical pressure, i.e., filtration is explored in this paper. Toward
this goal, it is proposed to use a commercial nanofiltration (NF)
membrane as a support for biomimetic lipid bilayer membranes to render
them robust enough to withstand the required pressures. It is shown in
this paper for the first time that by properly tuning molecular
interactions supported phospholipid bilayers (SPB) can be prepared on a
commercial NO membrane. The presence of SOB on the surface was verified
and quantified by several spectroscopic and microscopic techniques,
which showed morphology close to the desired one with very few defects.
As an ultimate test it is shown that hydraulic permeability of the SOB
supported on the NF membrane (NTR-7450) approaches the values deduced
from the typical osmotic permeabilities of intact continuous bilayers.
This permeability was unaffected by the trans-membrane flow of water
and by repeatedly releasing and reapplying a 10 bar pressure. Along
with a parallel demonstration that aquaporins could be incorporated in
a similar bilayer on mica, this demonstrates the feasibility of the
proposed approach. The prepared SOB structure may be used as a platform
for preparing biomimetic filtration membranes with superior performance
based on aquaporins. The concept of SPBs on permeable substrates of the
present type may also be useful in the future for studying transport of
various molecules through trans-membrane proteins.
C1 [Kaufman, Yair; Freger, Viatcheslav] Ben Gurion Univ Negev, ZIWR, Jacob Blaustein Inst Desert Res, Environm Engn Unit, IL-84105 Beer Sheva, Israel.
[Berman, Amir] Ben Gurion Univ Negev, Biotechnol Engn Dept, IL-84105 Beer Sheva, Israel.
RP Freger, V, Ben Gurion Univ Negev, ZIWR, Jacob Blaustein Inst Desert
Res, Environm Engn Unit, Sede Boger Campus, IL-84105 Beer Sheva, Israel.
EM vfreger@bgu.ac.il
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NR 45
TC 0
PU AMER CHEMICAL SOC; 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
DI 10.1021/la904411b
PD MAY 18
VL 26
IS 10
BP 7388
EP 7395
SC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
Multidisciplinary
GA 592RY
UT ISI:000277398600071
ER
EF
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