JACS Au,
Journal Year:
2022,
Volume and Issue:
2(2), P. 322 - 327
Published: Jan. 19, 2022
Materials
and
processes
for
chemical
separations
must
be
used
in
complex
environments
to
have
an
impact
many
practical
settings.
Despite
these
complexities,
much
research
on
has
focused
idealized
mixtures.
In
this
paper,
we
suggest
that
communities
specific
should
develop
well-defined
exemplar
mixtures
bridge
the
gap
between
fundamental
studies
applications
provide
a
hierarchical
framework
of
purpose.
We
illustrate
hierarchy
with
examples,
including
CO2
capture,
capture
uranium
from
seawater,
electrocatalytic
reactions,
among
others.
conclude
four
recommendations
community
accelerate
development
innovative
strategies
pressing
real-world
challenges.
Science,
Journal Year:
2022,
Volume and Issue:
377(6614), P. 1555 - 1561
Published: Sept. 29, 2022
Hydrocarbon
separation
relies
on
energy-intensive
distillation.
Membrane
technology
can
offer
an
energy-efficient
alternative
but
requires
selective
differentiation
of
crude
oil
molecules
with
rapid
liquid
transport.
We
synthesized
multiblock
oligomer
amines,
which
comprised
a
central
amine
segment
two
hydrophobic
blocks,
and
used
them
to
fabricate
polyamide
nanofilms
by
interfacial
polymerization
from
self-assembled
vesicles.
These
provide
transport
liquids
more
than
100
times
faster
that
conventional
hydrophilic
counterparts.
In
the
fractionation
light
oil,
manipulation
film
thickness
down
~10
nanometers
achieves
permeance
one
order
magnitude
higher
current
state-of-the-art
membranes
while
retaining
comparable
size-
class-based
separation.
This
high
markedly
reduce
plant
footprint,
expands
potential
for
using
made
ultrathin
in
fractionation.
Advanced Functional Materials,
Journal Year:
2022,
Volume and Issue:
32(52)
Published: Oct. 17, 2022
Abstract
Ion
exchange
membranes
(IEMs)
that
can
selectively
transport
ions
are
crucial
to
a
variety
of
applications,
such
as
ion
extraction/separation,
fuel
cells,
redox
flow
batteries,
and
water
electrolysis.
IEM
performance,
in
terms
membrane
permeability/conductivity
selectivity,
relies
heavily
on
the
formation
effective
channels
within
membranes,
there
exists
tradeoff
between
which
obstructs
development
widespread
adoption
IEM‐based
processes.
To
overcome
this
advance
IEM‐related
extensive
research
efforts
devoted
construction
tuning
channels,
various
strategies
proposed.
These
mainly
include
1)
inducing
microphase
separation
by
properly
regulating
polymer
architecture,
2)
introducing
third
phase/region
for
transfer,
3)
realizing
high
free
volume
with
polyrotaxanes
or
polymers
sterically
bulky
groups,
4)
constructing
nanoporous
materials.
outlined
summarized
review.
Perspectives
future
directions
also
discussed.
Science,
Journal Year:
2022,
Volume and Issue:
376(6597), P. 1105 - 1110
Published: June 2, 2022
The
design
of
materials
and
their
manufacture
into
membranes
that
can
handle
industrial
conditions
separate
complex
nonaqueous
mixtures
are
challenging.
We
report
a
versatile
strategy
to
fabricate
polytriazole
with
10-nanometer-thin
selective
layers
containing
subnanometer
channels
for
the
separation
hydrocarbons.
process
involves
use
classical
nonsolvent-induced
phase
method
thermal
cross-linking.
membrane
selectivity
be
tuned
lower
end
typical
nanofiltration
range
(200
1000
gram
mole
−1
).
enrich
up
80
95%
hydrocarbon
content
less
than
10
carbon
atoms
(140
These
preferentially
paraffin
over
aromatic
components,
making
them
suitable
integration
in
hybrid
distillation
systems
crude
oil
fractionation.
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
36(1)
Published: April 4, 2023
Abstract
2D
covalent
organic
frameworks
(2D
COFs)
are
attractive
candidates
for
next‐generation
membranes
due
to
their
robust
linkages
and
uniform,
tunable
pores.
Many
publications
have
claimed
achieve
selective
molecular
transport
through
COF
pores,
but
reported
performance
metrics
similar
networks
vary
dramatically,
in
several
cases
the
experiments
inadequate
support
such
conclusions.
These
issues
require
a
reevaluation
of
literature.
Published
examples
liquid‐phase
separations
can
be
broadly
divided
into
two
categories,
each
with
common
characteristics:
polycrystalline
films
(most
>1
µm
thick)
weakly
crystalline
or
amorphous
<500
nm
thick).
Neither
category
has
demonstrated
consistent
relationships
between
designed
pore
structure
separation
performance,
suggesting
that
these
imperfect
materials
do
not
sieve
molecules
uniform
In
this
perspective,
rigorous
practices
evaluating
membrane
structures
described,
which
will
facilitate
development
toward
molecularly
precise
capable
performing
previously
unrealized
chemical
separations.
absence
more
standard
proof,
reports
COF‐based
should
treated
skepticism.
As
methods
control
polymerization
improve,
polymer
may
exhibit
exquisite
energy
efficient
relevant
contemporary
challenges.
Advanced Membranes,
Journal Year:
2023,
Volume and Issue:
3, P. 100063 - 100063
Published: Jan. 1, 2023
The
development
of
polymer
materials
and
membrane
fabrication
techniques
in
recent
years
greatly
elevates
the
importance
feasibility
organic
solvent
nanofiltration
(OSN)
technology,
while
challenges
from
different
perspectives
still
hinder
wider
applications
based
OSN
membranes.
This
article
reviews
research
specifically
perspective
materials,
starting
by
recapping
progress
integrally
skinned
asymmetric
(ISA)
thin
film
composite
(TFC)
Comparing
to
commercially
available
polyimide
ISA
membranes
polyamide
TFC
membranes,
multiple
categories
emerging
result
with
much
improved
permselectivity
for
highly
efficient
molecular
separation.
In
view
adopting
engineering
applications,
this
review
also
summarizes
some
key
unique
including
material
swelling,
physical
aging
compaction,
efforts
overcome
them.
future
direction
application
prospects
are
briefly
discussed
latter
part
article,
noting
that
formation
control
crosslinking
strategies,
is
at
high
necessity
break
through
constraints
terms
performance
stability.
ACS Nano,
Journal Year:
2024,
Volume and Issue:
18(8), P. 6016 - 6027
Published: Feb. 13, 2024
Ion
exchange
membranes
allowing
the
passage
of
charge-carrying
ions
have
established
their
critical
role
in
water,
environmental,
and
energy-relevant
applications.
The
design
strategies
for
high-performance
ion
evolved
beyond
creating
microphase-separated
membrane
morphologies,
which
include
advanced
to
ion-selective
membranes.
properties
functions
been
repeatedly
updated
by
emergence
materials
with
subnanometer-sized
pores
understanding
movement
under
confined
micropore
channels.
These
research
progresses
motivated
researchers
consider
even
greater
aims
field,
i.e.,
replicating
channels
living
cells
exotic
or
at
least
targeting
fast
ion-specific
transmembrane
conduction.
To
help
realize
such
goals,
we
briefly
outline
comment
on
fundamentals
rationally
designing
pore
ultrafast
specific
conduction,
architecture/chemistry,
materials.
Challenges
are
discussed,
perspectives
outlooks
given.
