Materials,
Journal Year:
2025,
Volume and Issue:
18(4), P. 730 - 730
Published: Feb. 7, 2025
This
article
introduces
a
novel
biodegradable
metasurface-loaded
mobile
phone
back
cover
designed
to
reduce
electromagnetic
exposure
and
enhance
antenna
performance.
The
operates
across
the
low
GHz
band
(2-8
GHz)
millimeter-wave
(22-25.6
GHz),
utilizing
polylactic
acid
as
an
eco-friendly
substrate.
Integrated
with
six-port
multiple-input
multiple-output
(MIMO)
system,
achieves
port
isolation
above
20
dB
in
both
bands.
Specific
absorption
rate
(SAR)
analysis,
performed
using
human
head
model,
shows
significant
reductions
exposure-61.1%
(from
1.06
W/kg
0.412
W/kg)
55%
millimeter
wave
2.061
0.917
W/kg).
Additionally,
metasurface
enhances
gain
increases
impedance
bandwidth
by
20%
8.3%
band.
A
comparative
study
highlights
superior
SAR
reduction
improvement
of
on
substrate
over
one
silicone
Prototypes
MIMO
proposed
were
fabricated
tested,
revealing
strong
alignment
between
simulated
measured
results.
These
findings
highlight
potential
metasurface-based
covers
deliver
high-performance,
sustainable
solutions
for
communication
devices.
Polymer-Plastics Technology and Materials,
Journal Year:
2024,
Volume and Issue:
63(12), P. 1645 - 1681
Published: May 27, 2024
The
past
few
years
have
witnessed
a
significant
surge
in
research
focused
on
sustainable
food
packaging,
driven
by
consumer
ecological
awareness.
Food
packaging
can
be
categorized
as
functional,
which
requires
resistance
to
oxygen,
water,
and
bacteria,
high-performance,
demands
strong
mechanical
properties.
A
notable
trend
has
resulted
the
emergence
of
green
composites,
due
their
intrinsic
bio-based
biodegradable
nature.
Among
these
there
been
growing
interest
utilizing
poly
(lactic
acid)
(PLA)-based
composites
for
high-performance
particularly
through
incorporation
natural
fibers
reinforcement.
In
parallel,
use
zinc
oxide
(ZnO)
nanofillers
PLA-based
gained
attention
field
functional
packaging.
However,
noteworthy
gap
persists
literature
concerning
materials
demanding
both
properties,
with
combinations
ZnO-functionalizing
fillers
within
PLA
matrix.
This
review
intends
explore
effects
ZnO
films,
well
effectiveness
reinforcements
matrices.
also
emphasizes
need
future
integrating
matrix
active
rigid
Applications in Engineering Science,
Journal Year:
2024,
Volume and Issue:
18, P. 100184 - 100184
Published: May 31, 2024
This
paper
emphasizes
the
significant
usage
of
natural
fiber
as
a
reinforced
composite
in
potential
engineering
field.
Mechanical,
civil,
textile,
agricultural,
and
other
sectors
have
already
initiated
utilization
their
multiple
fields.
After
going
through
some
processes
like
treating
chemically
synthesizing
them
accordingly,
composites
are
prepared
for
respective
implementation.
Unlike
types
materials,
unique
properties
recyclability,
adaptability,
environmental
safety,
easy
persuasion.
On
hand,
different
naturally
oriented
jute,
cotton,
silk,
linen,
hemp,
etc.
almost
same
kind
mechanical,
thermal,
chemical
features
traditional
materials.
Additionally;
automobile,
marine,
aerospace,
medical,
recreation
industries
claim
realm
this
type
material
kingdom.
Though
moisture
problems,
swelling,
safe
reusability
threatening
fiber-reinforced
composites,
more
research
will
certainly
reduce
these
problems.
Researchers
play
role
permanent
solution
applications
every
sector.
Sustainable materials and technologies,
Journal Year:
2024,
Volume and Issue:
41, P. e01103 - e01103
Published: Sept. 1, 2024
Global
warming
and
climate
change
have
emerged
as
pressing
issues
closely
associated
with
human
activity
the
manufacturing
sector,
significantly
contributing
to
change.
Additive
(AM),
or
3D
printing
(3DP),
shows
great
promise
an
alternative
method
but
raises
concerns
regarding
plastic
waste
generation.
To
tackle
this
challenge,
recycling
polymer
plastics
exploring
natural
materials
for
3DP
offer
sustainable
solutions.
However,
a
comprehensive
understanding
of
both
aspects
currently
needs
be
improved.
This
study
aims
evaluate
current
trends
advancements
in
biocomposites
research,
identify
key
topics
emerging
areas
interest,
investigate
3DP,
assess
commonly
recycled
plastics,
examine
thermomechanical
properties
composites,
research
gaps
future
directions.
The
analysis
involved
collecting
evaluating
91
articles
from
Scopus
database.
findings
underline
growing
demand
approaches,
potential
materials,
need
improve
mechanical
properties.
Stakeholders
are
encouraged
adopt
practices
embrace
circular
economy
models
by
utilizing
composites
produce
biodegradable
composites.
Future
should
explore
advanced
methods
enhance
properties,
thereby
addressing
challenges
Waste,
Journal Year:
2024,
Volume and Issue:
2(2), P. 169 - 185
Published: April 19, 2024
Statistics
reveal
that
egg
production
has
increased
in
recent
decades.
This
growth
suggests
there
is
a
global
rise
available
eggshell
biomass
due
to
the
current
underutilization
of
this
bio-waste
material.
A
number
different
applications
for
waste
eggshells
(WEGs)
are
known,
include
their
use
as
an
additive
human/animal
food,
soil
amendment,
cosmetics,
catalyst,
sorbent,
and
filler
polymer
composites.
In
article,
worldwide
leading
countries
examined,
addition
discussion
various
biomass.
Eggshells
rich
supplement
calcium
carbonate;
therefore,
they
can
be
added
particulate
turn,
lower-cost
filler,
such
or
carbonate,
reduce
overall
material
fabrication
costs.
Polylactic
acid
(PLA)
currently
high-demand
biopolymer,
where
PLA
composites
gained
increasing
attention
its
eco-friendly
properties.
review,
contain
carbonate
emphasized,
mechanical
properties
(e.g.,
tensile
strength,
flexural
elastic
modulus,
elongation
(%)
at
break)
investigated.
The
results
from
review
eggshell/calcium
reduces
strength
composites,
whereas
increase
break
described
herein.
Materials,
Journal Year:
2024,
Volume and Issue:
17(2), P. 336 - 336
Published: Jan. 9, 2024
Polylactic
acid
(PLA),
as
a
renewable
and
biodegradable
green
polymer
material,
is
hailed
one
of
the
most
promising
biopolymers
capable
replacing
petroleum-derived
polymers
for
industrial
applications.
Nevertheless,
its
limited
toughness,
thermal
stability,
barrier
properties
have
restricted
extensive
application.
To
address
these
drawbacks
in
PLA,
research
efforts
primarily
focused
on
enhancing
through
copolymerization,
blending,
plasticization.
Notably,
blending
modified
biomass
with
PLA
expected
not
only
to
effectively
improve
deficiencies
but
also
maintain
biodegradability,
creating
fully
composite
substantial
developmental
prospects.
This
review
provides
comprehensive
overview
biomass-reinforced
an
emphasis
improvements
PLA’s
mechanical
properties,
achieved
cellulose,
lignin,
starch.
At
end
article,
brief
exploration
plasma
modification
presented
outlook
application
reinforced
materials
future.
valuable
insights
regarding
path
towards
PLA.
Sensors,
Journal Year:
2025,
Volume and Issue:
25(5), P. 1453 - 1453
Published: Feb. 27, 2025
The
integration
of
3D
printing
technology
into
wearable
sensor
systems
has
catalyzed
a
paradigm
shift
in
sports
psychology
and
athlete
health
monitoring
by
enabling
real-time,
personalized
data
collection
on
physiological
psychological
states.
In
this
study,
not
only
is
the
technical
potential
these
advancements
examined
but
their
real-world
applications
are
also
critically
assessed.
While
existing
research
primarily
focuses
fabrication
acquisition,
significant
gap
remains
evaluation
direct
impact
decision-making
processes
coaching,
mental
resilience,
long-term
adaptation
athletes.
A
critical
analysis
current
state
3D-printed
sensors
conducted,
highlighting
both
advantages
limitations.
By
combining
theoretical
insights
with
practical
considerations,
comprehensive
framework
established
for
understanding
how
sensor-based
interventions
can
be
effectively
incorporated
training
evaluation.
Future
should
prioritize
longitudinal
studies,
athlete-centered
validation,
interdisciplinary
collaborations
to
bridge
between
technological
developments
applications.
Additionally,
artificial
intelligence
advanced
biomaterials
enhance
reliability
interpretability
sensor-driven
interventions.
However,
without
rigorous
scientific
effectiveness
uncertain.
This
study
highlights
importance
systematic
approach
implementing
evaluating
psychology.
Results in Engineering,
Journal Year:
2023,
Volume and Issue:
21, P. 101685 - 101685
Published: Dec. 15, 2023
Additive
manufacturing
technologies
are
getting
attention
as
a
prospective
substitute
for
conventional
medical
implant
production
methods
owing
to
their
unique
properties.
In
addition,
biomaterials
required
bone
repair
and
tissue
engineering
(BTE)
techniques
provide
scaffolds
with
the
necessary
biological
structural
properties
improved
performance.
this
study,
widely
available
biocompatible
materials
acrylonitrile
butadiene
styrene
(ABS)
polylactic
acid
(PLA)
utilized
design,
fabrication,
simulation,
mechanical
characterization
of
3D-printed
two
lay-down
patterns
potentially
engineering.
Mechanical
determined
by
compression
test
finite
element
analysis
(FEA).
Moreover,
scanning
electron
microscope
(SEM)
images
also
analyzed
determine
printing
accuracy
scaffolds.
The
porosity
is
estimated
both
theoretically
through
liquid
displacement
method.
Finally,
comparative
between
PLA
ABS
indicates
that
scaffold
has
higher
potential
regeneration.
This
study
provides
notable
contribution
using
cost-efficient
easily
biomaterial
an
alternative
tissue.
Polymers,
Journal Year:
2024,
Volume and Issue:
16(5), P. 712 - 712
Published: March 5, 2024
This
study
focuses
on
developing
a
biodegradable
film
using
novel
hybrid
citrus
peel
pectin.
A
bilayer
approach
with
PLA
was
proposed
and
optimized
Response
Surface
Methodology
(RSM)
to
complement
pectin
films'
mechanical
barrier
property
limitations.
The
composition
(2.90
g
1.96
pectin)
showed
enhanced
strength
tensile
(TS)
of
7.04
MPa
an
elongation
at
break
(EAB)
462.63%.
In
addition,
it
demonstrated
lower
water
vapor
(1.45
×
10-10
g/msPa),
oxygen
(2.79
10-7
g/ms)
permeability,
solubility
(23.53%).
Compared
single-layer
films,
the
had
25%
increased
thickness,
significantly
improved
(3806
times
lower)
(3.68
properties,
22.38
higher
stretchability,
attributed
hydrogen
bond
formation,
as
confirmed
by
FTIR
analysis.
film,
effectively
protected
against
UV
visible
light,
could
be
light-induced
lipid
oxidation.
Moreover,
superior
seal
efficiency,
ensuring
secure
sealing
in
practical
applications.
pouch
containing
mustard
dressing
exhibited
stable
no
leakage
after
immersion
hot
ethanol,
making
suitable
for
food
packaging.
