Physics of Fluids,
Год журнала:
2024,
Номер
36(11)
Опубликована: Ноя. 1, 2024
In
this
study,
we
provide
the
first
experimental
evidence
that
colloidal
hydrophilic
magnetite
nanoparticles
can
penetrate
through
bilayer
lipid
membrane
in
a
non-uniform
stationary
magnetic
field.
Hydrophilic
ligand-free
cationic
with
an
average
diameter
of
4
nm
were
added
to
surrounding
aqueous
solution
on
one
side
azolectin
membrane.
An
external
field
ensured
attraction
superparamagnetic
membrane,
resulting
formation
near-membrane
charged
layer
initial
polarization
As
result
passage
decreases,
and
becomes
depolarized.
Independent
methods
used
detect
passed
including
transmission
electron
microscopy
energy-dispersive
x-ray
spectroscopy.
The
discovered
effect
may
be
due
following
factors
interactions
nanoparticles.
Interaction
inhomogeneous
provides
localization
surface.
Collective
between
nanoparticles,
as
well
their
electric
fields,
lead
nanoparticle
aggregates.
matrix
leads
organic–inorganic
complexes
which
polar
surface
is
enveloped
by
layer.
penetration
caused
interaction
aggregates
local
intramembrane
fields.
Targeted
and
rapid
mixing
is
a
common
task
in
microfluidic
devices.
Owing
to
their
small
dimensions,
flows
micromixers
are
laminar,
primarily
diffusion
driven.
Y-mixers,
which
have
two
inlet
channels
one
channel,
particularly
well
studied.
In
these
channels,
interface-reorientation
can
occur:
the
interface
tilts
from
side-by-side
flow
top-to-bottom
flow.
This
impacts
performance
may
complicate
product
extraction.
Studies
demonstrated
that
density
gradient
between
fluids
interdiffusion
of
solutes
affect
interface-reorientation.
However,
systematic
experimental
research
considering
both
influences
lacking.
Traditional
methods,
such
as
confocal
fluorescence
microscopy,
struggle
provide
highly
resolved
marker-free
measurements
constants.
These
methods
rely
on
added
markers,
it
remains
uncertain
whether
impact
fluid
properties.
this
work,
we
employ
Raman
microscopy
quantitative,
resolved,
method
simultaneously
measure
constants
orientation
situ.
Isopropanol:water,
deuterated
water:water,
ethanol:water
3-dimensional
(3D)-printed
Y-channels
were
measured.
A
general
model
for
interface-reorientation,
densities
interdiffusion,
derived
using
Buckingham
pi
theorem.
Diffusion
positively
affects
rotation
rate.
The
below
diffusive
influence
be
neglected
order
1.0×10−10
15.2×10−10
m2/s.
fundamental
comprehension
essential
strategic
engineering
devices,
selection
optimal
systems,
precise
determination
external
parameters,
velocity.
Applications
include
membraneless
fuel
cells,
chemical
processing
in-channel
surface
functionalization,
micropatterning.
International Journal of Applied Ceramic Technology,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 8, 2025
Abstract
An
ionic
nickel
complex
was
utilized
to
synthesize
an
adsorptive
mesoporous
MFI
zeolite
membrane
for
the
removal
of
heavy
metal
ions
from
water.
The
synthesis
conditions
(synthesis
temperature
=
185°C,
duration
96
h,
and
molar
ratio
NaOH
silica
set
1)
resulted
in
highest
content
(3.5
wt%)
within
structure.
incorporation
into
structure
requires
high
energy
sufficient
time.
template
used
simultaneously
incorporates
creates
a
Water
permeation
tests
conducted
on
demonstrated
that
20‐h
heat
treatment
yielded
water
flux.
presence
feed
solution
reduced
blocking
(water
flux
declined
40
15
L
m
−2
h
−1
over
1
week)
by
forming
stable
complexes
with
some
anions
hydrophilic
surface
modification
effect,
while
reduction
occurred
6
absence
ions.
Analysis
ion
concentrations
indicated
functions
effectively
as
membrane.
