Chemical Engineering Journal Advances,
Год журнала:
2023,
Номер
16, С. 100528 - 100528
Опубликована: Июнь 25, 2023
Surface
modification
is
a
critical
aspect
for
improving
the
efficiency
of
membranes
and
reducing
risk
fouling
in
applications
such
as
wastewater
treatment
oil/water
separation.
The
objective
this
study
to
minimize
membrane
maximize
its
rejection
rate
through
surface
modification.
Here,
first
time,
we
developed
dual-functionalized
PES
using
two-step
process,
involving
grafting
with
thermo-responsive
polymer
(P(NIPAm-co-AAm))
subsequent
functionalization
copper
oxide
nanoparticles.
were
evaluated
any
changes
their
chemical
composition,
structural
properties,
porosity,
charge,
wetting
characteristics.
hydrophilicity
all
modified
increased
indicated
by
noticeable
reduction
water
contact
angle.
displayed
change
receding
angle
based
on
temperature,
confirming
nature
PNIPAm.
grafted
P(NIPAm-co-AAm)
was
significantly
low
(∼13°)
below
33
°C
but
28°
when
temperature
exceeded
40
°C,
indicating
dependence
wettability
treated
temperature.
outperformed
pristine
membrane,
13%
increase
flux
26%
rise
recovery
ratio.
Additionally,
[email
protected](NIPAm-co-AAm)
showed
significant
improvements
contaminant
antifouling
ability,
>
98%
both
oil-water
emulsion
bovine
serum
albumin
(BSA).
achieved
separation
properties
make
an
excellent
candidate
demonstrate
efficacy
our
simple
process.
Advanced Functional Materials,
Год журнала:
2023,
Номер
33(51)
Опубликована: Авг. 30, 2023
Abstract
High
performance
polyamide
nanofiltration
membranes
play
important
roles
in
Mg
2+
/Li
+
separation
and
Li
extraction,
but
they
are
prepared
via
multiple
time‐/labor
demanding
steps.
Both
the
scalability
of
these
engineering
membrane
modules
remain
an
elusive
challenge.
Here
design
a
Gemini‐electrolyte
monomer
(GEM)
featuring
bidentate
amine
groups,
quaternary
ammonia,
endocyclic
contorted
conformation
is
reported.
The
monomer's
low
interfacial
diffusivity
balanced
by
high
condensational
reactivity
during
its
polymerization
with
trimesoyl
chloride
(TMC),
leading
to
straightforward
formation
defect‐free,
≈14
nm
thick
membranes.
shows
highest
permeance
(≈19.2
L
m
−2
h
−1
bar
)
among
without
post‐modification,
combined
good
selectivity
(≈15.4)
stability.
validity
GEM
verified
control
monomers.
Large‐area
(1
×
2
GEM‐TMC
spiral‐wound
(effective
area:
0.5
prepared,
both
which
show
reproducible
performance.
Journal of Materials Chemistry A,
Год журнала:
2023,
Номер
11(42), С. 22551 - 22589
Опубликована: Янв. 1, 2023
Our
analysis
of
the
current
literature
shows
that
advances
in
extractive
technologies
for
U/Li
recovery
lie
at
intersection
between
molecular
simulation,
nanotechnology
and
materials
science,
electrochemistry,
membrane
engineering.
Environmental Science & Technology,
Год журнала:
2023,
Номер
57(38), С. 14464 - 14471
Опубликована: Сен. 14, 2023
Nanofiltration
(NF)
is
a
promising
and
sustainable
process
to
extract
Li+
from
brine
lakes
with
high
Mg2+/Li+
mass
ratios.
However,
trade-off
between
Li/Mg
selectivity
Li
recovery
exists
at
the
scale,
of
commercially
lab-made
NF
membranes
in
single-pass
insufficient
achieve
industrially
required
purity.
To
overcome
this
challenge,
we
propose
multipass
recirculation
without
sacrificing
recovery.
We
experimentally
demonstrate
that
three-pass
commercial
membrane
can
exceed
1000,
despite
compromised
as
result
co-existing
cations.
Our
theoretical
analysis
further
predicts
four-pass
simultaneously
an
ultrahigh
over
4500
95%.
This
proposed
could
potentially
facilitate
efficient
NF-based
solute-solute
separations
all
kinds
contribute
development
novel
membrane-based
separation
technologies.
Science,
Год журнала:
2024,
Номер
385(6716), С. 1444 - 1449
Опубликована: Сен. 26, 2024
Lithium
mining
is
energy
intensive
and
environmentally
costly.
This
because
lithium
ions
are
typically
present
in
brines
as
a
minor
component
mixed
with
physiochemically
similar
cations
that
difficult
to
separate.
Inspired
by
nature’s
ability
selectively
extract
species
transpiration,
we
report
solar
transpiration–powered
extraction
storage
(STLES)
device
can
store
from
using
natural
sunlight.
Specifically,
the
uses
hierarchically
structured
transpirational
evaporator
create
pressure
gradient,
which
allows
for
of
through
membrane
its
vascular
layer.
Long-term
experiments,
various
tests,
different
size
assessments
demonstrate
stability,
compatibility,
scalability
STLES.
solar-powered
technology
provides
an
alternative
developing
pathway
toward
sustainable
critical
resources.
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Янв. 11, 2024
Abstract
Membrane
technology
using
well-defined
pore
structure
can
achieve
high
ion
purity
and
recovery.
However,
fine-tuning
the
inner
of
separation
nanofilm
to
be
uniform
enhance
effective
area
is
still
challenging.
Here,
we
report
dendrimers
with
different
peripheral
groups
that
preferentially
self-assemble
in
aqueous-phase
amine
solution
facilitate
formation
polyamide
nanofilms
a
range
structure.
The
permeabilities
are
maintained
by
forming
asymmetric
hollow
nanostripe
nanofilms,
their
well-designed
ranges
show
an
enhancement,
rationalized
molecular
simulation.
self-assembled
dendrimer
membrane
provides
Cl
–
/SO
4
2–
selectivity
more
than
17
times
its
pristine
counterparts,
increasing
from
167.9
2883.0.
Furthermore,
designed
membranes
higher
Li
recovery
compared
current
state-of-the-art
membranes.
Such
approach
scalable
strategy
fine-tune
subnanometre
structures
nanofilms.
Environmental Science & Technology,
Год журнала:
2024,
Номер
unknown
Опубликована: Фев. 7, 2024
Selective
electrodialysis
(ED)
is
a
promising
membrane-based
process
to
separate
Li+
from
Mg2+,
which
the
most
critical
step
for
Li
extraction
brine
lakes.
This
study
theoretically
compares
ED-based
Li/Mg
separation
performance
of
different
monovalent
selective
cation
exchange
membranes
(CEMs)
and
nanofiltration
(NF)
at
coupon
scale
using
unified
mass
transport
model,
i.e.,
solution-friction
model.
We
demonstrated
that
CEMs
with
dense
surface
thin
film
like
polyamide
are
more
effective
in
enhancing
than
those
loose
but
highly
charged
film.
Polyamide
film-coated
when
used
ED
have
similar
polyamide-based
NF
NF.
membranes,
expected
replace
separation,
will
require
support
layer
low
tortuosity
high
porosity
reduce
internal
concentration
polarization.
The
coupon-scale
analysis
comparison
provide
new
insights
into
design
composite
ion–ion
separation.
