Cited Article: Majumder M. Nanoscale hydrodynamics - Enhanced flow in carbon nanotubes
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Number of Citing Articles: 1 new records this week (1 in this e-mail)
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Title:
Supported Lipid Bilayer Membranes for Water Purification by Reverse Osmosis
Authors:
Kaufman, Y; Berman, A; Freger, V
Author Full Names:
Kaufman, Yair; Berman, Amir; Freger, Viatcheslav
Source:
LANGMUIR 26 (10): 7388-7395 MAY 18 2010
Language:
English
Document Type:
Article
KeyWords Plus:
ATOMIC-FORCE MICROSCOPY; QUARTZ-CRYSTAL MICROBALANCE; INTERFACIAL POLYMERIZATION; NANOFILTRATION MEMBRANES; PHOSPHOLIPID-BILAYERS; MOLECULAR-DYNAMICS; CARBON NANOTUBES; VESICLE FUSION; SURFACES; CHARGE
Abstract:
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.
Reprint Address:
Freger, V, Ben Gurion Univ Negev, ZIWR, Jacob Blaustein Inst Desert Res, Environm Engn Unit, Sede Boger Campus, IL-84105 Beer Sheva, Israel.
Research Institution addresses:
[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
E-mail Address:
vfreger@bgu.ac.il
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Cited Reference Count:
45
Times Cited:
0
Publisher:
AMER CHEMICAL SOC; 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Subject Category:
Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary
ISSN:
0743-7463
DOI:
10.1021/la904411b
IDS Number:
592RY
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