Gümüşhane Üniversitesi Fen Bilimleri Enstitüsü Dergisi,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 29, 2024
Sound
transmission
mechanisms
and
sound
losses
are
of
great
importance
in
providing
acoustic
comfort.
Research
has
focused
on
developing
materials
structures
that
will
reduce
loss.
The
increasing
amount
waste
disrupts
the
ecological
balance;
this
situation
brings
about
global
warming,
air
soil
pollution.
These
environmental
effects
negatively
affect
lives
all
living
things,
especially
humans,
also
harm
economy.
Combating
pollution
become
one
primary
goals
scientists.
Recycling
provides
significant
economic
benefits
as
well
protecting
both
human
health
natural
resources.
In
study,
polyurethane
foams
used
automotive
industry
many
other
areas
were
produced
by
adding
soda
glass
powder
at
various
rates
while
keeping
isocyanate/polyol
ratio
constant.
durability
was
tested
apparent
density
measurement,
wettability
contact
angle
analysis,
organic
bond
FT-IR
spectroscopy
properties
loss
analysis.
It
determined
did
not
react
with
exhibited
hydrophobic
properties.
filler
higher
than
neat
foam
almost
entire
frequency
range
(65-6300
Hz).
sample
coded
PU-SG4
is
exhibits
best
reaching
9.28
dB,
9.10
dB
13.48
values
low,
medium
high
regions,
respectively.
region,
added
composites
reached
a
over
13
dB.
Materials Advances,
Год журнала:
2024,
Номер
5(15), С. 6132 - 6144
Опубликована: Янв. 1, 2024
Triboelectric
nanogenerators
(TENGs)
based
on
flexible
polyurethane
foam
(FPU)
offer
an
attractive
approach
for
energy
harvesting
self-powered
devices.
Materials Advances,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
This
review
shows
that
flexible
polyurethane
foam
is
a
promising
material
for
triboelectric
devices
across
wide
range
of
applications
due
to
several
advantages,
such
as
its
high
porosity,
deformability,
light
weight,
and
recyclability.
With
the
advent
of
smart
era,
demand
for
clean
energy
is
rising,
and
flexible
triboelectric
nanogenerators
(F-TENGs)
based
on
elastomers
have
garnered
significant
attention.
Based
principles
electrostatic
induction
coupling,
F-TENGs
can
convert
mechanical
motion
into
electrical
are
widely
utilized
in
wearable
devices
blue
energy.
offer
a
simple
design,
ease
manufacturing,
usage
scenarios.
However,
several
weaknesses
still
limit
their
development.
For
example,
F-TENG
materials
cannot
recover
from
fatigue
damage
prone
to
output
performance
degradation
under
frequent
friction
or
complex
external
conditions,
leading
failure.
To
address
these
issues,
researchers
explored
use
self-healable
polymer-based
layers
electrodes.
This
review
will
provide
detailed
summary
key
scientific
technological
challenges
faced
by
harsh
environments,
including
ambient,
high
low
temperatures,
humidity,
strong
acids
bases.
Furthermore,
research
progress
addressing
issues
future
development
also
be
presented
explored.
paper
aims
valuable
insights
guidance
in-depth
broad
applications
TENGs.
Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Авг. 8, 2024
This
study
aims
to
investigate
the
potential
of
integrating
natural
biochar
(BC)
derived
from
eggshell
waste
into
flexible
polyurethane
(FPU)
foam
enhance
its
mechanical
and
acoustic
performance.
The
explores
impact
incorporating
BC
at
various
weight
ratios
(0.1,
0.3,
0.5,
0.7
wt.
%)
on
properties
FPU
foam.
Additionally,
effects
modifying
with
(3-aminopropyl)trimethoxysilane
(APTMS)
different
(10,
20,
30
influence
diverse
particle
sizes
thermal,
mechanical,
characteristics
composite
are
investigated.
functional
groups,
morphology,
elemental
composition
developed
composites
analyzed
using
Fourier-transform
infrared
spectroscopy
(FTIR),
field-emission
scanning
electron
microscopy
(FESEM),
energy-dispersive
X-ray
(EDX)
techniques.
Characteristics
such
as
density,
gel
fraction,
porosity
were
also
assessed.
results
reveal
that
density
increased
by
4.32%
7.83%
while
decreased
50.22%
47.05%
addition
0.1
%
unmodified
modified
20
APTMS,
respectively,
compared
unfilled
FPU.
fraction
matrix
increases
1.91%
3.55%
inclusion
respectively.
Furthermore,
TGA
analysis
revealed
all
demonstrate
improved
thermal
stability
FPU,
reaching
a
peak
value
312.17°C
for
sample
APTMS.
Compression
strength
untreated
but
higher
concentrations.
Modifying
20%
APTMS
resulted
in
an
8.23%
increase
compressive
Acoustic
showed
absorption,
enhanced
absorption
Class
D
mm
thickness.
further
(Class
E),
modification
showing
best
results.
These
present
promising
materials
sound
applications
address
environmental
issues
related
waste.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(34), С. 44780 - 44790
Опубликована: Авг. 15, 2024
The
state-of-the-art
triboelectric
nanogenerator
(TENG)
technology
has
numerous
advantages
and
creates
new
prospects
for
the
rapid
development
of
Internet
Things
(IoT)
in
marine
environments.
Here,
to
accelerate
application
process
TENG,
an
elaborately
designed
multilayered
sleeve-structured
hybrid
(M-HNG)
is
developed
efficiently
persistently
harvest
energy.
M-HNG
integrates
electromagnetic
(EMG)
with
four
coils
a
TENG
(MS-TENG)
three
freestanding
layer
units
increase
spatial
utilization
efficiency.
Moreover,
rabbit
fur
strips
are
introduced
enhance
output
performance
strengthen
durability
TENG.
Therefore,
MS-TENG
high
due
its
soft-contact
structure,
maintaining
even
after
240,000
cycles.
When
1000
μF
capacitor
charged
by
utilizing
power
management
circuit
(PMC),
stored
energy
increased
from
2.62
mJ
140.11
mJ,
representing
significant
improvement
52-fold.
triggered
water
waves
successfully
powered
various
small
electronic
devices,
including
1200
LED
lights,
nine
thermo-hygrometers,
quality
testing
pen,
level
alarms.
proposed
effectively
harvests
low-frequency
wave
energy,
introducing
innovative
concept
constructing
enhanced
density
durability.
