Membranes,
Journal Year:
2024,
Volume and Issue:
14(9), P. 198 - 198
Published: Sept. 20, 2024
Filtration
membranes
coated
in
metals
such
as
copper
have
dramatically
improved
biofouling
resistance
and
pathogen
destruction.
However,
existing
coating
methods
on
polymer
impair
membrane
performance,
lack
uniformity,
may
detach
from
their
substrate,
thus
contaminating
the
permeate.
To
solve
these
challenges,
we
developed
first
electroless
deposition
protocol
to
immobilize
nanoparticles
electrospun
polyacrylonitrile
(PAN)
fibers
for
design
of
antimicrobial
membranes.
The
was
facilitated
by
prior
silver
seeding.
Distinct
mats
with
average
fiber
diameters
232
±
36
nm,
727
148
nm
1017
80
were
evaluated
filtration
performance.
Well-dispersed
conformal
fibers,
preserving
open-cell
architecture
particle
sizes
ranged
20
140
nm.
Infrared
spectroscopy
revealed
PAN
mats’
relative
chemical
stability/resistance
metallization
process.
In
addition,
classical
cyclization
cyano
functional
group
observed.
For
model
polystyrene
beads
3
μm,
Cu
NP–PAN
had
high
water
flux
separation
efficiency
negligible
loss
NP
during
flow
testing.
Fiber
size
increased
somewhat
decreased
efficiency,
though
values
still
high.
Heliyon,
Journal Year:
2024,
Volume and Issue:
10(15), P. e35588 - e35588
Published: Aug. 1, 2024
Copper
and
chitosan
are
used
for
biomedical
applications
due
to
their
antimicrobial
properties.
In
this
study,
a
facile
method
the
synthesis
of
chitosan-copper
oxide
nanocomposites
(nCuO-CSs)
was
modified,
yielding
stable
colloidal
nCuO-CSs
suspensions.
Using
method,
with
different
copper-to-chitosan
(50-190
kDa)
weight
ratios
(1:0.3,
1:1,
1:3)
were
synthesized,
physicochemical
properties
characterized,
antibacterial
efficacy
assessed
against
Gram-negative
Nanomaterials,
Journal Year:
2024,
Volume and Issue:
14(13), P. 1111 - 1111
Published: June 28, 2024
Two
novel
samples
of
nanoparticles
based
on
chitosan
were
greenly
synthesized
using
pomegranate
peel
extract.
The
extract
served
as
a
nanoparticle
precursor,
facilitating
the
precipitation
nanosized
through
ionic
gelation
method.
Additionally,
by
mixing
green
with
copper
ions,
nanoscale
composite
and
oxide
was
also
produced.
Structural
morphological
investigations
(FTIR,
XRD,
SEM,
EDX,
TGA
analyses)
performed
for
their
to
determine
all
significant
characteristics
those
nanoparticles.
In
addition,
both
tested
some
biological
investigations,
such
antimicrobial
activity
hematological
effects.
tests
yielded
promising
results
CuO
when
two
bacterial
strains
fungal
strains.
Moreover,
showed
that
similar
concentration
green-based
resulted
in
slightly
larger
inhibition
zone
lower
minimum
(MIC)
compared
microorganisms
included
test.
mean
count
blood
components
(RBCs
platelets),
clotting
time,
cholesterol
levels
three
different
used
indicate
verified
slight
reduction
component
after
addition
nanoparticles,
but
did
not
have
noticeable
effect
samples.
able
cause
considerable
time
samples,
thus
acting
procoagulants.
However,
prolonged
rate
from
hypercholesteremic
individuals,
thus,
mixture
acted
an
anticoagulant
agent.
Journal of Vinyl and Additive Technology,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 18, 2024
Abstract
A
ternary
blend
nanocomposite
composed
of
polyvinyl
alcohol/cashew
gum/polypyrrole
(PVA/CG/PPy)
with
varying
contents
copper
oxide
(CuO)
nanoparticles
was
synthesized
via
an
in
situ
polymerization
method,
using
water
as
eco‐friendly
solvent.
Fourier‐transform
infrared
spectroscopy
(FTIR),
UV–visible
spectroscopy,
field
emission
scanning
electron
microscopy
(FE‐SEM),
x‐ray
diffraction
(XRD),
thermogravimetric
analysis
(TGA),
and
differential
calorimetry
(DSC)
were
used
to
characterize
the
nanocomposites.
FTIR
spectra
demonstrated
strong
intermolecular
interactions
between
functional
groups
PVA/CG/PPy
CuO
nanoparticles.
XRD
patterns
revealed
that
nanofillers
arranged
a
structured
manner
within
matrix.
FE‐SEM
confirmed
uniform
dispersion
arrangement
at
concentration
3
wt%
TGA
DSC
results
showed
addition
improved
both
thermal
stability
glass
transition
temperature
Electrical
properties
content
up
wt%,
resulting
enhanced
conductivity,
increased
dielectric
constant,
reduced
activation
energy.
The
highest
tensile
strength,
13.76
MPa,
also
observed
this
concentration.
However,
declined
beyond
due
agglomeration,
making
ideal
for
maximum
performance.
This
study
highlights
potential
PVA/CG/PPy/CuO
nanocomposites
applications
requiring
electrical
stability,
particularly
flexible
electronics
energy
storage
devices.
Highlights
Eco‐friendly
synthesis
biopolymer
films
Improvement
morphological,
optical
films.
magnify
pristine
Conductivity
characteristics:
frequency
dependence
explored.
films:
pliable
contenders
unveiling
industrial
potentials.
Membranes,
Journal Year:
2024,
Volume and Issue:
14(9), P. 198 - 198
Published: Sept. 20, 2024
Filtration
membranes
coated
in
metals
such
as
copper
have
dramatically
improved
biofouling
resistance
and
pathogen
destruction.
However,
existing
coating
methods
on
polymer
impair
membrane
performance,
lack
uniformity,
may
detach
from
their
substrate,
thus
contaminating
the
permeate.
To
solve
these
challenges,
we
developed
first
electroless
deposition
protocol
to
immobilize
nanoparticles
electrospun
polyacrylonitrile
(PAN)
fibers
for
design
of
antimicrobial
membranes.
The
was
facilitated
by
prior
silver
seeding.
Distinct
mats
with
average
fiber
diameters
232
±
36
nm,
727
148
nm
1017
80
were
evaluated
filtration
performance.
Well-dispersed
conformal
fibers,
preserving
open-cell
architecture
particle
sizes
ranged
20
140
nm.
Infrared
spectroscopy
revealed
PAN
mats’
relative
chemical
stability/resistance
metallization
process.
In
addition,
classical
cyclization
cyano
functional
group
observed.
For
model
polystyrene
beads
3
μm,
Cu
NP–PAN
had
high
water
flux
separation
efficiency
negligible
loss
NP
during
flow
testing.
Fiber
size
increased
somewhat
decreased
efficiency,
though
values
still
high.
