Journal of Natural Fibers,
Год журнала:
2024,
Номер
22(1)
Опубликована: Дек. 14, 2024
For
decades,
agricultural
waste-derived
natural
fibers
have
been
explored
to
reduce
plastic
waste
impacts
and
improve
management.
However,
fiber-reinforced
composites
often
underperform
compared
high-cost
synthetic
fibers.
This
study
aims
enhance
the
performance
of
areca
sheath
fiber
(ASF)-reinforced
epoxy
through
minimal
additions
(3,
5,
7
wt%)
low-cost
thermoplastic
polybutylene
terephthalate
monofilament
(PBTM).
The
effects
alkali-treated
ASF
loadings
(30,
40,
50,
60
structural
modifications
on
continuous
were
examined.
PBTM
was
used
fabricate
ASF-reinforced
with
sandwich
random
structures.
Compared
composites,
structures
increased
tensile
flexural
strengths
by
up
83%
45%,
respectively.
Modifying
50
wt%
composite
modulus
(1.5
3.4
GPa),
breaking
energy
(1.1
1.7
MJ/m3),
impact
strength
(24.5
36.7
kJ/m2).
modification
also
significantly
enhanced
thermal
stability
reduced
water
absorption,
as
confirmed
thermogravimetric
absorption
analyses.
Optical
microscopic
fractogram
characterization
indicated
that
surface
treatment
improved
interface
compatibility,
while
their
load-bearing
capacity.
These
findings
suggest
suitability
PBTM-modified
hybrid
in
construction
other
applications.
Case Studies in Thermal Engineering,
Год журнала:
2024,
Номер
56, С. 104204 - 104204
Опубликована: Март 4, 2024
This
study
explores
the
influence
of
Zinc
Oxide
(ZnO)
nanofluids
on
solar
water
heaters
with
Dimple
Tubes
and
Helical
Twisted
Tape
(DTHTT)
surfaces.
The
helical
twisted
tape
design
enhances
turbulence,
improving
nanofluid
mixing
thermal
exchange.
Computational
fluid
dynamics
(CFD)
validates
efficiency
parabolic
trough
heater
(PTSWH)
emphasis
light
concentration
feed
flow
velocity.
Optimal
conditions
include
a
0.3%
ZnO
volume
concentration,
mass
rates
between
1.0
kg/min
5.0
kg/min,
copper-type
tapes.
Experimental
results
reveal
Nusselt
number
enhancements
15.1%
20.96%
at
H/D
=
10,
16.72%
32.12%
3,
for
nanofluid,
Reynolds
numbers
from
3000
to
8000.
arrangement
3
exhibits
increased
mixing,
leading
higher
convective
heat
transfer.
Friction
factor
8000
are
0.26%
0.38%,
respectively,
compared
base
fluid.
At
3.0
rate,
increases
39.25%,
13.25%
gain
over
plain
model
shows
±3.24%
deviation
expected
friction
factor,
total
±1.2%
discrepancy
experimental
simulated
findings,
remaining
within
an
acceptable
range.
The
growing
demand
for
fiber-reinforced
polymer
(FRP)
in
industrial
applications
has
prompted
the
exploration
of
natural
fiber-based
composites
as
a
viable
alternative
to
synthetic
fibers.
Using
jute–rattan
composite
offers
potential
environmentally
sustainable
waste
material
decomposition
and
cost
reduction
compared
conventional
fiber
materials.
This
article
focuses
on
impact
different
machining
constraints
surface
roughness
delamination
during
drilling
process
FRP
composite.
Inspired
by
this
unexplored
research
area,
emphasizes
influence
various
Response
methodology
designs
experiment
using
drill
bit
material,
spindle
speed,
feed
rate
input
variables
measure
factors.
technique
order
preference
similarity
ideal
solution
method
is
used
optimize
parameters,
predicting
delamination,
two
machine
learning-based
models
named
random
forest
(RF)
support
vector
(SVM)
are
utilized.
To
evaluate
accuracy
predicted
values,
correlation
coefficient
(R2),
mean
absolute
percentage
error,
squared
error
were
used.
RF
performed
better
comparison
with
SVM,
higher
value
R2
both
testing
training
datasets,
which
0.997,
0.981,
0.985
roughness,
entry
exit
respectively.
Hence,
study
presents
an
innovative
through
learning
techniques.
Municipal
solid
waste
incineration
ash
is
the
outcome/product
of
bioengineering
science.
The
or
burning
municipal
(MSW)
reduces
volume
this
biomass
by
90%,
and
residual
can
be
used
in
several
applications.
In
study,
potential
(MSWI)
calcium
carbide
residue
(CCR)
for
stabilization
expansive
soil
has
been
experimentally
evaluated.
abnormal
shrink–swell
characteristics
soils
pose
problems
civil
engineering
structures
when
these
are
construction
their
original
form.
study
presents
an
experimental
set-up
to
determine
best
combination
additives
achieve
most
favorable
technical
activities.
percentage
kept
fixed
at
60%
total
weight
mix
varying
ratios
stabilizing
agents.
optimization
materials
based
on
highest
strength
parameters
achieved
a
particular
ratio
soil.
two
agents
materials,
disposal
through
landfilling
become
costly
due
scarcity
space
handling
mechanisms.
values
parameters,
unconfined
compressive
(UCS),
split
tensile
(STS)
treated
found
unique
lime
stabilized
20%
MSWI
equal
quantity
(20%)
CCR.
cumulative
effect
adding
curing
time
depicts
improvement
526.03%
UCS
463.41%
STS
compared
one
day
28
days
time.
There
scope
further
such
as
some
fibers
finalized
reinforce
mix.
Plastics Rubber and Composites Macromolecular Engineering,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 13, 2025
This
article
presents
the
influence
of
hybridisation
aramid
and
glass
fibre
woven
fabric
on
fracture
toughness
(
K
IC
)
composites.
Experiments
using
single-edge-notched-bending
(SENB)
were
conducted
to
investigate
effect
Mode
I
specimen
aramid/glass
laminates.
The
results
revealed
that
epoxy
composites
yielded
highest
,
followed
by
hybrid
composites,
finally,
which
exhibited
lowest
.
Fracture
micrographs
showed
similar
patterns
–
pullout,
rupture
matrix
those
mechanical
properties
being
inferior
suggest
there
is
no
advantage
in
fibres
partially
replace
achieving
