Three-dimensional
superhydrophilic
materials
hardly
achieve
continuous
high-flux
demulsification
and
separation
for
oil-in-water
emulsions
due
to
intrinsic
oleophilicity
leading
potential
penetration
of
oil
droplets
through
hydration
layer
contamination
on
the
surface
over
long-term
processes.
Constructing
oleophobic
micro-regions
can
intensify
anti-oil-fouling
capacity
three-dimensional
materials.
Herein,
a
composite
superhydrophilic-oleophobic
copper
foam
was
prepared
co-deposition
aminated
fluorinated
carbon
nanotubes,
skillfully
introducing
inherent
interface
anti-oil-adhesion
capacity.
Through
column
technique,
modified
foams
achieved
surfactant-stabilized
free
without
interruption
cleaning
with
high
fluxes
6000
10000
L·m-2·h-1,
efficiencies
95.1%
97.4%,
repectively.
Various
after
transformed
into
immiscible
oil-water
mixtures,
which
be
quickly
separated
pure
water
at
aid
second-step
procedure
by
mesh.
Importantly,
amount
recycled
consistent
that
in
feed
emulsion
during
separation,
indicating
accumulated
could
maintain
dynamic
equilibrium
steady-state
achieved.
The
represents
significant
breakthrough
industrial
application
separation.
Solar RRL,
Journal Year:
2023,
Volume and Issue:
8(4)
Published: Dec. 15, 2023
Oily
wastewater
has
been
causing
serious
water
environment
pollution
and
greatly
affecting
the
safety
of
drinking
water.
Compared
with
superwettable
oil‐water
separation
membrane
technology,
solar‐driven
evaporators
based
on
specific
wettability
can
effectively
remove
not
only
oil
but
also
ions,
dyes,
other
substances
from
wastewater.
We
report
a
longitudinally
cut,
porous,
wood‐based
evaporator
that
exhibits
superhydrophilic
underwater
superoleophobic
properties.
By
collaborating
hydrophilic
oleophobic
wettability,
high
porosity
structural
anisotropy
wood,
solar
different
oils
oily
emulsions.
Separation
efficiency
surfactant‐containing
crude
oil‐in‐water,
peanut
silicone
diesel
n‐dodecane‐in‐water
emulsions
reach
up
to
99.57%,
99.1%,
99.86%,
99.75%,
99.28%,
respectively.
The
rate
evaporation
increased
by
1.83
times
1.63
kg
m
−2
h
−1
compared
radially‐cut
evaporator.
Meanwhile,
it
is
capable
purifying
heavy
metal
acid‐base
solution.
This
easily
prepared
accessible
provides
viable
idea
for
obtaining
pure
treatment.
The
complex
wastewater
contaminated
with
oil
and
organic
dyes
tremendously
threatens
ecological
environment
human
habitat.
single
functional
membrane
separation
technology
is
not
qualified
to
deal
treatment.
Therefore,
it
necessary
develop
multifunctional
materials
possess
the
ability
both
oil/water
dye
adsorption.
Hence,
we
a
simple
environmental
strategy
incorporate
zeolitic
imidazolate
framework-8
(ZIF-8)
as
adsorbent
into
superhydrophilic
hydrogel
coated
PVDF
through
in-situ
growth
gained
anti-oil
fouling
adsorption
properties.
prepared
tannic
acid-poly(acrylamide-co-acrylic
acid)-sodium
alginate@ZIF-8
(TPS@ZIF-8)
exhibited
high
oil-in-water
emulsion
efficiency
of
99.77%
after
10
cycles
outstanding
property
that
flux
recover
rate
more
than
96.86%
in
continuous
filtration
experiment,
owing
strong
hydration
TPS@ZIF-8
coating.
Moreover,
abundant
active
sites
(including
–COO-,
phenolic
hydroxyl
benzene
ring)
consisted
by
ZIF-8
hydrophilic
groups
on
TPS@ZIF-8-PVDF
improved
capacity
selective
cationic
over
97.01%.
process
for
methylene
blue
(MB)
followed
pseudo-second-order
kinetic
model
Langmuir
model.
Combining
underwater
superoleophobic
properties,
could
simultaneously
separate
mixtures
showed
cycle
performance
stability.
Furthermore,
maintain
superwetting
properties
various
chemical
mechanical
environments.
This
study
offers
new
insights
design
treatment
purification.
Three-dimensional
superhydrophilic
materials
hardly
achieve
continuous
high-flux
demulsification
and
separation
for
oil-in-water
emulsions
due
to
intrinsic
oleophilicity
leading
potential
penetration
of
oil
droplets
through
hydration
layer
contamination
on
the
surface
over
long-term
processes.
Constructing
oleophobic
micro-regions
can
intensify
anti-oil-fouling
capacity
three-dimensional
materials.
Herein,
a
composite
superhydrophilic-oleophobic
copper
foam
was
prepared
co-deposition
aminated
fluorinated
carbon
nanotubes,
skillfully
introducing
inherent
interface
anti-oil-adhesion
capacity.
Through
column
technique,
modified
foams
achieved
surfactant-stabilized
free
without
interruption
cleaning
with
high
fluxes
6000
10000
L·m-2·h-1,
efficiencies
95.1%
97.4%,
repectively.
Various
after
transformed
into
immiscible
oil-water
mixtures,
which
be
quickly
separated
pure
water
at
aid
second-step
procedure
by
mesh.
Importantly,
amount
recycled
consistent
that
in
feed
emulsion
during
separation,
indicating
accumulated
could
maintain
dynamic
equilibrium
steady-state
achieved.
The
represents
significant
breakthrough
industrial
application
separation.
