Macromolecular Rapid Communications,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 27, 2024
Abstract
Sound
absorption
plays
a
crucial
role
in
addressing
noise
pollution
that
may
cause
harm
to
both
human
health
and
wildlife.
To
tackle
this
environmental
issue,
the
implementation
of
natural‐based
sound
absorbing
materials
attracts
considerable
attention
last
few
years.
In
study,
absorbing,
eco‐friendly
composites
are
produced
by
combining
3D
natural
sponge
namely
Luffa
Cylindrica
(LC)
with
cellulose
acetate
(CA)
microfibrous
layers
fabricated
through
electrospinning.
Electrospun
microfibers
can
effectively
absorb
waves
due
their
unique
properties
such
as
high
porosity,
small
diameter,
large
surface
area.
The
individual
components
resulting
composites,
exhibiting
various
configurations,
characterized
respect
morphology,
density,
properties.
More
precisely,
coefficient
is
determined
standing
wave
ratio
method
within
range
500–4000
(Hz)
frequency.
most
promising
consist
multilayer
combination
LC
CA
layers,
which
creates
new
prospects
development
for
applications.
Polymers,
Год журнала:
2025,
Номер
17(3), С. 281 - 281
Опубликована: Янв. 22, 2025
Effective
sound
absorption
materials
are
essential
for
mitigating
noise
pollution
in
urban
and
industrial
environments,
which
pose
serious
health
risks
to
humans.
This
work
develops
a
hierarchical
natural
fibre
binderless
composite
based
on
porous
luffa,
modified
with
localised
cellulose
nanocrystals
(CNCs),
application
acoustic
panels.
The
impedance
tube
approach
was
employed
systematically
evaluate
performance
across
range
of
frequencies.
Adding
3
wt.%
7
CNCs
the
luffa
structure
improved
its
absorption,
especially
mid-to-high
frequency
areas.
panels
3%
CNC
exhibited
most
balanced
various
thicknesses,
while
7%
CNC–luffa
demonstrated
excellent
averages
all
ranges,
although
increased
rigidity
reflective
tendencies
were
observed.
nano-modification
successfully
maintained
coefficient
reduced
panel
thickness.
study
establishes
CNC-modified
composites
as
sustainable
efficient
alternative
conventional
materials,
leveraging
renewable
resources
lightweight
characteristics.
These
findings
highlight
potential
CNC-luffa
mitigation,
paving
way
environmentally
conscious
solutions.
Polymers,
Год журнала:
2024,
Номер
16(16), С. 2307 - 2307
Опубликована: Авг. 15, 2024
Polymer
matrix
solid
buoyancy
materials
(PSBMs)
have
the
advantages
of
low
density,
high
strength,
cost,
and
water
absorption,
they
are
widely
used
in
marine
engineering
fields.
How
to
improve
performance
PSBMs
further
adapt
them
harsh
environments
has
become
a
hot
topic
current
research.
This
paper
provides
comprehensive
summary
PSBM,
detailing
both
preparation
methodologies
properties
single-component
multi-component
PSBM.
In
this
paper,
relevant
research
is
systematically
summarized
from
two
dimensions
filler,
application
thermosetting
resin
thermoplastic
as
PSBM
introduced
detail,
corresponding
on
fillers
such
hollow
glass
microspheres,
fly
ash,
ceramic
spheres
polymer
microspheres
expounded.
aims
summarize
latest
advancements
research,
thereby
providing
insights
into
state
field
guiding
future
investigations.
Polymers for Advanced Technologies,
Год журнала:
2024,
Номер
35(8)
Опубликована: Авг. 1, 2024
Abstract
The
primary
objective
of
this
research
is
to
fabricate
semi‐interpenetrating
polymer
networks
(semi‐IPNs)
via
in‐situ
polymerization
methyl
methacrylate
(MMA)
within
a
polyurethane
(PU)
framework.
To
produce
polymethyl
(PMMA)
from
MMA
in
the
PU
matrix,
solution
was
utilized
following
weight
ratios:
30/70,
50/50,
70/30,
and
90/10.
effective
formation
semi‐IPNs
PU/PMMA
confirmed
by
several
techniques.
Fourier
transform
infrared
(FTIR)
proves
that
no
new
chemical
bonds
formed
between
semi‐IPNs,
only
physical
interactions
were
present,
X‐ray
diffraction
(XRD)
techniques
tell
about
amorphous
nature
these
semi‐IPNs.
field
emission
scanning
electron
microscope
(FESEM)
atomic
force
(AFM)
examine
morphology
In
contrast
alternative
70/30
90/10
exhibit
uniform
devoid
phase
separation.
Furthermore,
significant
thermal
stability
transitions
assessed
using
thermogravimetric
analysis
(TGA)
differential
calorimetry
(DSC).
Additionally,
mechanical
indicates
among
different
percentages
PU/PMMA,
exhibits
highest
tensile
strength
approximately
50.5
MPa.
observed
enhancement
can
be
attributed
interpenetrating
(IPNs)
constituents.
synthesized
have
potential
various
fields,
including
medical
devices,
automotive
components,
sports,
other
advanced
applications.
