The Biomechanical Properties of A Modified Distraction Device Used in Mandibular Distraction Osteogenesis for Craniofacial Microsomia Patients: A Simulation Finite Element Analysis Study
Journal of Craniofacial Surgery,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 10, 2025
Objective:
Finite
element
analysis
(FEA)
of
the
biomechanical
properties
modified
extraoral
distractor
device
used
in
mandibular
distraction
craniofacial
microsomia
patients.
Materials
and
Methods:
models
5
patients
under
2
working
conditions,
instance
when
is
activated
participates
mastication,
were
included
current
study.
To
conduct
FEA,
load
boundary
conditions
(35.6
N
on
for
first
condition
50
unoperated
side,
100
200
both
sides
second
condition)
applied.
Besides,
constraint
contact
also
Results:
With
or
3
bioabsorbable
screws
fixing
upper
plate,
maximal
displacement
mandible
was
<3
mm
stress
distributed
less
than
yield
strength
corresponding
materials
setting
side
condition.
However,
condition,
slightly
increased,
exceeded
some
Conclusion:
In
most
cases,
poly-L-lactic
acidscrews
could
firmly
fix
without
plastic
deformation,
although
situation
would
be
different
mastication
force
too
powerful.
Язык: Английский
Triazole Drives Hole Localization and Superoxide Radical Formation for Enhancive Photocatalytic Cascade Isomerization/C─C Bond Scission of Biomass to Lactic Acid
Small,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 31, 2025
Chemocatalytic
synthesis
of
lactic
acid
(LA)
from
biomass
sugars
involves
heat-absorbing
multistep
cascade
reactions
mediated
by
different
active
sites,
often
encountering
unsatisfactory
selectivity.
Here,
a
hole-localized
carbon
nitride-based
photocatalyst
(C-CNN)
is
constructed
covalent
binding
heptazine
and
triazole
skeleton
via
C─N
bonds
further
conjugated
interaction
with
activated
carbon,
achieving
the
complete
conversion
various
to
LA
(up
98.6%
selectivity)
at
room
temperature
for
2
h.
The
introduced
electron
donor
in
C-CNN
can
not
only
enhance
adsorption
sugar
enhanced
aldose-to-ketose
isomerization
over
localized
hole
(Lewis
acid)
on
skeleton,
but
also
modulate
valence
band
oxidation
circumvent
formation
•OH
•O2
‒
selective
C3‒C4
cleavage
ketose,
thus
realizing
exclusive
LA.
Moreover,
near-infrared
light
absorption
endowed
supply
sufficient
interface
photothermal
effect
ambient
production.
Life
cycle
assessment
shows
that
photocatalytic
system
has
good
prospects
industrialization
terms
both
energy
environment.
This
work
offers
novel
insights
into
multidirectional
utilization
solar
value-added
through
rational
modulation
sites.
Язык: Английский
High-Efficiency and Low-Resistance Melt-Blown/Electrospun PLA Composites for Air Filtration
Polymers,
Год журнала:
2025,
Номер
17(3), С. 424 - 424
Опубликована: Фев. 6, 2025
Biodegradable
polylactic
acid
(PLA)
was
used
to
fabricate
nonwoven
fabrics
via
the
melt
blowing
process,
followed
by
electrospinning
deposit
a
nanofiber
membrane.
This
composite
process
yielded
PLA
melt-blown/electrospun
materials
with
excellent
filtration
performance.
The
effects
of
solution
concentration
and
spinning
duration
on
structure
material
performance
were
investigated.
optimal
produced
using
10
wt.%
prepared
solvent
mixture
dichloromethane
(DCM)
N,
N-dimethylformamide
(DMF)
in
75/25
weight
ratio.
parameters
included
5
h,
18
kV
voltage,
1.5
mL/h
flow
rate,
12
cm
collection
distance.
resulting
achieved
efficiency
98.7%,
pressure
drop
142
Pa,
an
average
pore
size
μm,
contact
angle
138.7°.
These
results
provided
for
preparing
materials.
study
highlights
potential
hydrophobic
composites
high
low
air
resistance
as
environmentally
friendly
alternatives
traditional
non-degradable
Язык: Английский
Unraveling the Crystallization, Mechanical, and Heat Resistance Properties of Poly(butylene adipate-co-terephthalate) Through the Introduction of Stereocomplex Crystallites
Crystals,
Год журнала:
2025,
Номер
15(3), С. 247 - 247
Опубликована: Март 6, 2025
Poly(butylene
adipate-co-terephthalate)
(PBAT)
is
a
promising
degradable
polymer
for
replacing
non-degradable
traditional
plastics
to
mitigate
pollution.
However,
its
low
softening
temperature
and
poor
hardness
impede
application.
Herein,
PBAT
stereocomplex
polylactide
(sc-PLA)
blends
were
fabricated
through
melt-blending
process
balance
the
heat
resistance
mechanical
strength
of
in
this
research.
The
effects
PLA
content
hot
embossing
on
blend
properties
comprehensively
investigated.
results
demonstrate
that
sc-crystal
PBAT/sc-PLA
increased
by
493%
as
rose
from
10%
30%.
with
15%
PLLA
PDLA,
embossed
at
190
°C,
exhibited
highest
sc-PLA
crystallinity
23.3%
largest
fraction
sc-crystallites
66%,
leading
optimal
comprehensive
performance.
Its
Vicat
(VST)
reached
92.2
nonlinear
increase
trend
accordance
power-law
model
between
VST
mass
ratio
was
obtained.
Compared
neat
PBAT,
maximum
tensile
yield
stress
9.7
MPa
Young’s
modulus
82.5
achieved
improved
approximately
107%
361%,
respectively.
This
research
offers
an
effective
strategy
synergistically
enhancing
PBAT.
Язык: Английский
Preparation of piezoelectric β-PLA utilizing a micro-shear field in non-solvent induced phase separation
Chemical Engineering Journal,
Год журнала:
2025,
Номер
unknown, С. 161804 - 161804
Опубликована: Март 1, 2025
Язык: Английский
Enhancing Antibacterial and Mechanical Properties of Polylactic Acid Fibers Through Trace Coordination Bonding With Nano‐Cu2O for Sustainable Public Textiles
Journal of Applied Polymer Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 15, 2025
ABSTRACT
Public
Textiles
require
high
durability
and
safety,
yet
common
materials
like
cotton,
linen,
silk,
wool
are
prone
to
harboring
pathogens
experiencing
mechanical
deterioration
due
microbial
activity.
Developing
fibers
with
exceptional
antimicrobial
properties
for
is
crucial
but
challenging.
Herein,
a
trace
coordination
bond
crosslinking
strategy
was
proposed
prepare
nano‐Cu
2
O/polylactic
acid
(Cu
O/PLA)
highly
antibacterial
activity,
robustness,
recyclability.
The
dynamic
bonds
allow
uniform
dispersion
of
O
in
PLA,
improving
molecular
chain
interfaces
resulting
excellent
performance
(tensile
fracture
strength
48.75
MPa).
combination
O's
capacity
PLA's
weak
acidity
provides
superior
activity
(99.99%)
against
various
pathogens.
This
enables
Cu
O/PLA
demonstrate
an
shelf
life
exceeding
6
months.
Additionally,
the
ease
breaking
regenerating
grants
Therefore,
this
offers
novel
viable
approach
preparing
nanocomposite
PLA
properties,
addressing
challenges
faced
Textiles.
Язык: Английский
Nonisothermal Crystallization Behavior and Crystallization Morphology of Three‐Arm Polylactic Acid With Different Chain Lengths
Journal of Applied Polymer Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 15, 2025
ABSTRACT
To
investigate
the
effects
of
chain
length
on
crystallization
ability
three‐arm
polylactic
acid
(TA‐PLA),
a
series
TA‐PLA
samples
with
different
lengths
were
synthesized
by
ring‐opening
polymerization
lactide.
Differential
scanning
calorimetry
(DSC)
was
used
to
study
their
nonisothermal
behavior,
and
polarized
optical
microscope
(POM)
observe
isothermal
morphology.
The
analysis
revealed
that
increase
in
reduced
TA‐PLA.
For
instance,
12.1
longest
only
exhibited
crystallinity
38.21%
at
cooling
rate
1°C/min,
whereas
3.9
reached
up
70.75%.
Mo
equation
provided
an
accurate
description
kinetics
shown
simulate
process
sample
successfully.
From
photographs
captured
using
POM,
it
evident
long
chains
slowed
growth
(G)
spherical
crystals
samples.
Furthermore,
distinct
temperature
dependencies
spherulitic
rates.
Язык: Английский