Macromolecular Materials and Engineering,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 30, 2024
Abstract
Polyamide
(PA)
has
excellent
mechanical
properties,
making
it
versatile
in
various
applications,
including
3D
printing.
This
paper
comprehensively
investigates
and
compares
the
mechanical,
structural,
thermal,
geometric
properties
of
3D‐printed
PA12
samples
produced
with
desktop
industrial
printers
using
material
extrusion
(MEX)
powder
bed
fusion
(PBF)
processes.
The
tests
included
tensile,
flexural,
Charpy
impact,
Shore
hardness,
torsion,
water
absorption
tests.
Additionally,
scanning
electron
microscopy
(SEM),
differential
calorimetry
(DSC),
melt
volume
rate
(MVR)
measurements
are
conducted.
To
verify
printing
accuracy
from
a
biomedical
perspective,
prosthetic
fingers
subjected
to
assessments.
Industrial
PBF
show
significantly
higher
values
for
most
tensile
Young's
modulus
1776
±
19.42
MPa,
while
second
highest
value
is
1419
58.77
MPa
(MEX
desktop).
Furthermore,
MVR
(18.34
cm
3
/10
min
2.32
min)
this
printer
exhibits
superior
performance
than
other
printers.
balanced
print
quality
mechanics
make
recommended
medical
device
production,
but
lower‐priced
FFF
can
be
good
alternative
simple,
fast
solutions
that
do
not
require
high
precision.
Journal of Biomaterials Science Polymer Edition,
Год журнала:
2025,
Номер
unknown, С. 1 - 39
Опубликована: Янв. 24, 2025
Bone
disorders
have
increased
with
increasing
the
human
lifespan,
and
despite
tissue's
ability
to
self-regeneration,
in
many
congenital
problems
hard
fractures,
bone
grafting
such
as
autograft,
allograft,
biomaterials
implantation
through
surgery
is
traditionally
used.
Because
of
adverse
effects
these
methods,
emergence
injectable
hydrogels
without
need
for
causing
more
pain
patient
stunning
develop
a
new
pattern
tissue
engineering.
These
materials
are
formed
various
natural
synthetic
polymers
crosslinked
network
chemical
methods
click
chemistry,
Michael
enhancement,
Schiff's
base
enzymatic
reaction
physical
interactions
high
water
absorption
which
can
mimic
environment
cells.
The
purpose
this
research
review
capabilities
class
regeneration
last
decade
adaptable
properties,
fill
defect
sites
an
irregular
shape,
grow
hormones
or
release
drugs,
response
external
stimuli.
Materials & Design,
Год журнала:
2023,
Номер
234, С. 112362 - 112362
Опубликована: Сен. 25, 2023
Additive
manufacturing
(AM)
is
an
increasingly
important
technology
for
fabricating
complex
and
customized
structures
using
a
range
of
advanced
materials
now
playing
critical
role
in
the
field
bone
tissue
engineering
(BTE).
Two-dimensional
nanomaterials
(2D
NMs)
have
demonstrated
their
significance
biomedical
science.
The
convergence
2D
NMs
to
3D
printing
(3DP)
create
desired
scaffolds
has
become
alternative
approach
breakthrough
bottlenecks
remaining
challenges
BTE,
which
can
potentially
achieve
multifunctionality
substitute.
first
part
this
review
provides
overview
mechanism
comparison
commonly-used
3DP
bioprinting
methods.
Each
method's
strengths
weaknesses
are
evaluated
provide
comprehensive
understanding
current
state
future
development.
Next,
general
synthetic
produce
NMs,
including
top-down
bottom-up
approaches,
summarized.
Furthermore,
in-depth
coverage
recent
advances
combining
various
with
specific
techniques
regeneration
covered.
By
examining
latest
research
field,
study
aims
shed
light
on
potential
revolutionize
regeneration.
Scientific Reports,
Год журнала:
2023,
Номер
13(1)
Опубликована: Дек. 18, 2023
Enhancing
the
mechanical
and
thermal
properties
of
Silicone
rubber
(SR)/SEBS
blends
using
various
compatibilizers
opens
opportunity
for
such
new
to
meet
market
desire.
For
this
purpose,
with
a
1:1
ratio
SR
SEBS
are
prepared
different
amounts
EVA
or
SEBS-MA
copolymers
as
compatibilizer.
Mechanical
blend
enhanced
by
adding
SEBS-MA.
Addition
6
phr
profoundly
improves
tensile
strength
from
7.70
10.06
MPa.
Thermogravimetric
analysis
reveals
that
presence
compatibilizer
can
improve
stability
blend,
especially
its
initial
degradation
temperature
(T5%).
T5%
increases
376
390
°C
when
comprising
Morphology
is
investigated
SEM
AFM.
Results
relaxation
modulus
curves
obtained
process
analyzer
(RPA)
demonstrate
amount
in
uncured
higher
than
cured
ones.
A
comparison
indicates
compatibilized
more
other
after
curing.
Further
investigations
indicate
exhibit
tear
energy
lower
compression
set.
This
study
developed
a
bone
cement
based
on
hydroxyapatite
(HAp)
and
magnetically
activated
with
cobalt
ferrite
(CoFe2O4)
magnetite
(Fe3O4)
nanoparticles
for
potential
use
in
orthopedic
surgeries
like
vertebroplasty.
Magnetic
(MNPs@SiO2)
were
mixed
HAp
varying
ratios
(30:70,
50:50,
70:30)
incorporated
into
hydrogel
matrix
of
carboxymethylcellulose,
glycerin,
distilled
water,
forming
fluid-viscous
magnetic
cements.
These
analyzed
through
XRD,
SEM,
swelling
degree,
pH,
setting
time,
mechanical
strength,
properties,
cell
viability.
XRD
confirmed
the
crystalline
phases
each
component,
while
SEM
revealed
hybrid
morphologies
micropores.
Cements
higher
content
exhibited
greater
simulated
body
fluid
(SBF)
faster
reaction
kinetics,
values
between
58%
91%.
After
7
days
SBF,
pH
stabilized
7.0
7.3,
ensuring
biocompatibility.
Setting
times
ranged
from
12
to
25
minutes,
making
them
suitable
clinical
use.
Compressive
strengths
28.91
MPa
30.06
achieved
after
14
days,
indicating
structural
stability.
Ferrimagnetic
behavior
was
observed,
magnetizations
reaching
27.30
emu/g
31.08
ferrite.
All
formulations
non-cytotoxic
behavior,
confirming
their
safety
biomedical
applications.
Biotechnology and Bioengineering,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 15, 2025
ABSTRACT
Hydrogel
scaffolds
show
high
potential
in
tissue
engineering
due
to
excellent
mechanical
properties
and
biocompatibility.
However,
an
inherent
lack
of
conductivity
limits
its
application
areas
requiring
electrical
stimulation.
To
address
this
issue,
chitosan
(CS)/gelatin
(Gel)
were
prepared
with
various
concentrations
multi‐walled
carbon
nanotubes
(MWCNTs).
Results
indicated
that
MWCNT
incorporation
significantly
improved
both
the
strength
scaffolds,
CS/Gel/0.3%
MWCNTs
scaffold
demonstrating
superior
biocompatibility
compared
other
formulations.
Additionally,
fibroblasts
seeded
onto
responded
positively
stimulation,
showing
increased
proliferation
elevated
expression
type
I
III
collagen.
These
findings
highlight
CS/Gel/MWCNTs
enhance
wound
healing
skin
engineering.
Pharmaceuticals,
Год журнала:
2024,
Номер
17(10), С. 1332 - 1332
Опубликована: Окт. 5, 2024
:
This
study
investigates
the
development
of
3D
chitosan-x-cobalt
ferrite
scaffolds
(x
=
5,
7.5,
and
10
wt%)
with
interconnected
porosity
for
potential
biomedical
applications.
The
objective
was
to
evaluate
effects
magnetic
particle
incorporation
on
scaffolds'
structural,
mechanical,
magnetic,
biological
properties,
specifically
focusing
their
biocompatibility
antimicrobial
performance.
