Pervaporation
membrane
reactors
attract
much
attention
as
a
promising
system,
in
which
separation
and
reaction
are
carried
out
simultaneously
to
overcome
the
thermodynamic
equilibrium
limitation
increase
conversion
by
removing
one
or
several
synthesized
products.
For
this,
this
study
supported
carboxymethyl
cellulose
(CMC)
membranes
modified
with
Zn-based
metal
organic
frameworks
(Zn(SEB),
Zn(BIM),
Zn(BDC)Si)
were
developed.
Transport
properties
of
obtained
evaluated
pervaporation
quaternary
mixtures
(acetic
acid
(AcOH),
ethanol
(EtOH),
ethyl
acetate
(EtAc),
water)
various
compositions.
CMC/Zn(BIM)
membranes,
possessed
optimal
transport
characteristics,
tested
hybrid
process
"reaction+pervaporation"
using
batch
reactor
compared
data
without
membrane.
The
changes
structure
physicochemical
developed
studied
spectroscopic,
microscopic
methods,
thermogravimetric
analysis
measurements
contact
angles.
To
confirm
findings
obtained,
theoretical
consideration
computational
methods
for
was
out.
It
shown
that
application
CMC/Zn(BIM)(10
wt.%)
pervaporation-assisted
esterification
led
formation
more
than
5
times
larger
amount
EtAc
decreased
AcOH
EtOH
(50/50
M)
wt.%
Amberlyst
15
catalyst
at
60°C.
Materials Today Sustainability,
Год журнала:
2024,
Номер
25, С. 100672 - 100672
Опубликована: Янв. 13, 2024
Mixed-matrix
membranes
(MMMs)
have
emerged
as
a
promising
approach
for
developing
new,
stable,
and
highly
effective
gas
liquid
separation
materials.
MMMs
combine
porous
crystalline
framework
materials,
such
Metal-organic
frameworks
(MOFs),
covalent
organic
(COFs),
hydrogen-bonded
(HOFs),
fillers
incorporated
in
polymer
matrix.
This
article
comprehensively
reviews
MMM
research,
discussing
the
structure
properties
of
MOFs,
COFs,
HOFs
their
attractiveness
use
MMMs.
The
also
mixed
matrix
filtration
with
various
water
treatment
applications.
potential
meeting
needs
different
industries
is
demonstrated
through
discussion
specific
examples.
Overall,
this
highlights
significant
technology
next-generation
materials
attempts
to
cover
most
recent
progress
design
deployment
COFs
HOFs-based
MMMs,
are
remaining
obstacles
prospects.
work
enormous
these
applications
raises
attention
toward
economic
aspect
market
diffusion
Polymers,
Год журнала:
2024,
Номер
16(9), С. 1206 - 1206
Опубликована: Апрель 25, 2024
Pervaporation
is
considered
the
most
promising
technology
for
dehydration
of
bioalcohols,
attracting
increasing
attention
as
a
renewable
energy
source.
In
this
regard,
development
stable
and
effective
membranes
required.
study,
highly
efficient
enhanced
pervaporation
ethanol
were
developed
by
modification
sodium
alginate
(SA)
with
polyethylenimine
(PEI)
forming
polyelectrolyte
complex
(PEC)
graphene
oxide
(GO).
The
effect
modifications
GO
or/and
PEI
on
structure,
physicochemical,
transport
characteristics
dense
was
studied.
formation
PEC
ionic
cross-linking
its
interaction
led
to
changes
in
membrane
confirmed
spectroscopic
microscopic
methods.
physicochemical
properties
investigated
thermogravimetric
analysis,
differential
scanning
calorimetry,
measurements
contact
angles.
theoretical
consideration
using
computational
methods
showed
favorable
hydrogen
bonding
interactions
between
GO,
PEI,
water,
which
caused
improved
performance.
To
increase
permeability,
supported
without
treatment
cross-linked
deposition
thin
layer
from
optimal
PEC/GO
(2.5%)
composite
onto
porous
substrate
polyacrylonitrile.
demonstrated
more
than
two
times
increased
permeation
flux,
higher
selectivity
(above
99.7
wt.%
water
permeate)
stability
separating
diluted
mixtures
compared
pristine
SA
membrane.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2024,
Номер
12(32), С. 12014 - 12028
Опубликована: Июль 31, 2024
Green
energy
transition
has
supposed
to
give
a
huge
boost
the
electric
vehicle
rechargeable
battery
market.
This
generated
compelling
demand
for
raw
materials,
such
as
cobalt
and
nickel,
which
are
key
common
constituents
in
lithium-ion
batteries
(LIBs).
However,
their
existing
mining
protocols
concentrated
localization
of
ores
have
made
nickel
mineral
conundrums,
supplies
experience
shortages,
threaten
slow
progress
renewable
transition.
Aiming
contribute
sustainable
recycling
these
valuable
metals
from
LIBs
wastewater,
this
work,
we
explore
use
four
mixed
matrix
membranes
(MMMs)
embedding
different
metal–organic
frameworks
(MOFs),
i.e.,
MIL-53(Al),
MIL-53(Fe),
MIL-101(Fe),
{SrIICuII6[(S,S)-serimox]3(OH)2(H2O)}·39H2O
(SrCu6Ser)
polyether
sulfone
(PES),
recovery
cobalt(II)
nickel(II)
metal
cations
cobalt–nickel
aqueous
solutions
containing
interfering
ions.
Whereas
neat
PES
membrane
slightly
contributes
adsorption
ions,
showing
reduced
removal
efficiency
values
10.2
9.5%
Ni(II)
Co(II),
respectively,
inclusion
MOFs
polymeric
substantially
improves
performances.
The
MOF@PES
MMMs
efficiently
remove
water,
with
MIL-53(Al)@PES
being
one
that
presents
better
performance,
up
95%
Co(II).
Remarkably,
SrCu6Ser@PES
exhibits
outstanding
selectivity
toward
compared
ones,
efficiencies
63.7
15.1%
Co(II)
Ni(II),
respectively.
Overall,
remarkable
efficiencies,
versatility,
high
environmental
robustness,
cost-effective
synthesis
shown
by
family
situate
them
among
best
adsorbents
extraction
kind
contaminants.
Polymers,
Год журнала:
2024,
Номер
16(9), С. 1236 - 1236
Опубликована: Апрель 28, 2024
Recently,
increasing
attention
of
researchers
in
the
field
membrane
technology
has
been
paid
to
development
membranes
based
on
biopolymers.
One
well-proven
polymers
for
porous
is
cellulose
acetate
(CA).
This
paper
devoted
study
influence
different
parameters
ultrafiltration
CA
formation
and
their
transport
properties,
such
as
variation
coagulation
bath
temperature,
shrinkage
(post-treatment
at
80
°C),
introduction
casting
solution
(polyethylene
glycol
(PEG),
polysulfone
(PS),
Pluronic
F127
(PL))
carbon
nanoparticles
(SWCNTs,
MWCNTs,
GO,
C60).
The
structural
physicochemical
properties
developed
were
studied
by
scanning
electron
atomic
force
microscopies,
Fourier-transform
infrared
spectroscopy,
X-ray
photoelectron
contact
angle
measurements.
CA-based
evaluated
bovine
serum
albumin
(BSA),
dextran
110
PVP
K-90.
All
rejected
90%
compounds
with
a
molecular
weight
from
~270,000
g/mol.
It
was
shown
that
combination
modifications
(addition
PEG,
PS,
PL,
PS-PL,
0.5
wt%
C60)
led
an
increase
fluxes
BSA
rejection
coefficients
slight
decrease
flux
recovery
ratio.
These
changes
due
increased
macrovoid
number,
more
open
structure
and/or
thinner
top
selective,
decreased
surface
roughness
hydrophobization
during
C60
modification
blend
membranes.
Optimal
found
CA-PEG+C60
(the
highest
water—394
L/(m2h)
BSA—212
fluxes)
CA-PS+C60
(maximal
coefficient
BSA—59%)
