ACS ES&T Engineering,
Год журнала:
2022,
Номер
2(11), С. 2023 - 2033
Опубликована: Авг. 26, 2022
Interlayered
thin-film
nanocomposite
(TFNi)
membranes
have
experimentally
demonstrated
a
great
potential
for
achieving
major
gains
in
water
permeance
over
conventional
composite
membranes,
making
them
promising
candidates
many
environmental
applications.
Nevertheless,
existing
literature
often
reports
contradicting
observations
on
the
effectiveness
of
interlayers.
In
this
study,
we
implement
three-dimensional
solution-diffusion
model
to
analyze
geometry-induced
funnel
effect
and
an
interlayer-promoted
gutter
effect.
Our
simulation
results
suggest
that
even
ultrathin
interlayer
few
nanometers
thickness
could
serve
as
low-resistance
layer,
which
minimizes
transversal
transport
less
permeable
polyamide
layer
thereby
mitigate
unfavorable
The
actual
available
is
bounded
by
ideal
polyamide-limited
upper
bound
substrate-limited
lower
bound,
with
regulating
competition
between
Water
can
be
potentially
improved
order
magnitude
interlayer,
enhancement
more
pronounced
thinner
layers,
porous
substrates,
We
further
role
improving
flux
distribution/uniformity
membrane
surface,
has
implications
fouling
propensity.
study
establishes
theoretical
framework
understanding
fundamental
mechanisms
TFNi
provides
important
guidance
future
development
high-performance
desalination
membranes.
Environmental Science & Technology,
Год журнала:
2022,
Номер
56(18), С. 12811 - 12827
Опубликована: Сен. 1, 2022
Nanofiltration
(NF)
membranes
have
been
widely
applied
in
many
important
environmental
applications,
including
water
softening,
surface/groundwater
purification,
wastewater
treatment,
and
reuse.
In
recent
years,
a
new
class
of
piperazine
(PIP)-based
NF
featuring
crumpled
polyamide
layer
has
received
considerable
attention
because
their
great
potential
for
achieving
dramatic
improvements
membrane
separation
performance.
Since
the
report
novel
Turing
structures
that
exhibited
an
order
magnitude
enhancement
permeance
(
Science
2018,
360
(6388),
518−521),
number
published
research
papers
on
this
emerging
topic
grown
exponentially
to
approximately
200.
critical
review,
we
provide
systematic
framework
classify
morphologies.
The
fundamental
mechanisms
fabrication
methods
involved
formation
these
morphologies
are
summarized.
We
then
discuss
transport
solutes
how
phenomena
could
simultaneously
improve
permeance,
selectivity,
antifouling
applications
highlighted,
future
opportunities/needs
identified.
insights
review
guidance
further
development
high-performance
tailored
wide
range
applications.
Advanced Materials,
Год журнала:
2022,
Номер
34(21)
Опубликована: Март 3, 2022
Ultrathin
membranes
are
at
the
forefront
of
membrane
research,
offering
great
opportunities
in
revolutionizing
separations
with
ultrafast
transport.
Driven
by
advanced
nanomaterials
and
manufacturing
technology,
tremendous
progresses
made
over
last
15
years
fabrications
applications
sub-50
nm
membranes.
Here,
an
overview
state-of-the-art
ultrathin
is
first
introduced,
followed
a
summary
fabrication
techniques
emphasis
on
how
to
realize
such
extremely
low
thickness.
Then,
different
types
membranes,
categorized
based
their
structures,
that
is,
network,
laminar,
or
framework
discussed
focus
interplays
among
structure,
methods,
separation
performances.
Recent
research
development
trends
highlighted.
Meanwhile,
performances
current
for
representative
(gas
liquid
separation)
thoroughly
analyzed
compared.
Last,
challenges
material
design,
structure
construction,
coordination
given,
order
fully
potential
facilitate
translation
from
scientific
achievements
industrial
productions.
Environmental Science & Technology,
Год журнала:
2022,
Номер
56(4), С. 2656 - 2664
Опубликована: Фев. 3, 2022
Interlayered
thin-film
nanocomposite
(TFNi)
membranes
have
been
shown
to
achieve
enhanced
water
permeance
as
a
result
of
the
gutter
effect.
Nevertheless,
some
studies
report
impaired
separation
performance
after
inclusion
an
interlayer.
In
this
study,
we
resolve
competing
mechanisms
transport
in
transverse
direction
vs
that
normal
direction.
To
enable
easy
comparison,
carbon
nanotube
(CNT)-incorporated
TFNi
with
identical
polyamide
rejection
layer
but
different
interlayer
thicknesses
were
investigated.
While
increasing
thickness
CNT
facilitates
(therefore
improving
effect),
it
simultaneously
increases
its
hydraulic
resistance
An
optimal
13.0
±
0.7
L
m–2
h–1
bar–1,
which
was
more
than
doubled
over
control
membrane
6.1
realized
at
moderate
thickness,
resulting
from
trade-off
between
these
two
mechanisms.
demonstrate
reduced
fouling
and
improved
reversibility
for
without
interlayer,
can
be
attributed
uniform
flux
distribution.
The
fundamental
revealed
study
lay
solid
foundation
future
development
toward
properties
antifouling
ability.
