Ultrafast and On-Demand Oil/Water Separation Membrane
System Based on Conducting Polymer Nanotip Arrays
Posted on 2020-06-22 - 14:25
Ultrafast
oil/water separation based on tunable superwettability
switch remains a big challenge. Here, inspired by the ultrafast water
transport mechanism in sarracenia, we develop a micro/nanostructured
porous membrane with conducting polymer nanotip arrays through the
surface-initiated polymerizations. By modulating the height (ranging
from 49–529 nm) and redox states of nanotips, a smart reversible
superwettability switch is facile to obtain with contact angles of
water/oil arranging from 161° to about 0°. Besides, liquid
transport speed was accelerated more than 1.5 times by increasing
the nanotip length. The water flux could reach up to 50326 L m–2 h–1 (1000 times that of a typical
industrial ultrafiltration membrane). This is attributed to the stable
and continuous water film along the nanotips, which provide a lubrication
layer, leading to an increase of permeability. This work provides
significant insights into macro/nanostructured membrane design for
smart separation, blood lipid filtration, and smart nanoreactors with
high permeability.
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Wang, Zhengao; Yu, Peng; Zhou, Jiajia; Liao, Jingwen; Zhou, Lei; Ran, Heying; et al. (2020). Ultrafast and On-Demand Oil/Water Separation Membrane
System Based on Conducting Polymer Nanotip Arrays. ACS Publications. Collection. https://doi.org/10.1021/acs.nanolett.0c00911
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AUTHORS (13)
ZW
Zhengao Wang
PY
Peng Yu
JZ
Jiajia Zhou
JL
Jingwen Liao
LZ
Lei Zhou
HR
Heying Ran
JZ
Jingxia Zhai
JX
Jun Xing
GT
Guoxin Tan
ZZ
Zhengnan Zhou
YL
Yangfan Li
CN
Chengyun Ning
YZ
Yahong Zhou
KEYWORDS
ultrafast water transport mechanismwater fluxultrafiltration membranenanotip lengthwater filmseparationUltrafast1.5 timessuperwettability switchcontact anglestunable superwettability switchblood lipid filtrationtransport speedpermeabilityredox statessurface-initiated polymerizationspolymer nanotip arrayslubrication layer