Progress in Additive Manufacturing,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 10, 2024
Abstract
Two
vat
polymerization
techniques
were
evaluated
to
print
innovative
hydrogel
scaffolds
for
tissue
engineering,
from
aqueous
photo-crosslinkable
formulations
based
on
methacrylated
carboxymethylcellulose
(mCMC).
A
first
formulation
containing
2
wt%
mCMC
with
a
methacrylation
degree
(DM)
of
34%
and
lithium
phenyl-2,4,6-trimethylbenzoylphosphinate
(LAP)
as
photoinitiator
was
specifically
developed
digital
light
processing
(DLP).
Considering
their
viscoelastic
properties
measured
by
shear
rheology,
the
DLP-printed
hydrogels
proposed
soft-tissue
repair.
Interestingly,
swelling
ratio
shape
printed
found
be
preserved
when
immersed
in
physiological
environment.
While
demonstrated
impressive
X-
Y-resolutions
(85
µm),
they
limited
producing
hollow
objects
Z-direction.
To
address
this
limitation,
3D
printing
complex
through
two-photon
(TPP)
investigated
time,
using
second
composed
4
(DM
=
50%).
cavities
30
µm
successfully
resolution
10
µm,
paving
way
design
controlled
precise
structures,
engineering.
Graphical
abstract
Progress in Additive Manufacturing,
Journal Year:
2022,
Volume and Issue:
8(2), P. 331 - 351
Published: Aug. 25, 2022
Abstract
Additive
manufacturing
is
a
layer-by-layer
strategy
enabling
the
advanced
design
and
fabrication
of
complex
3D
objects
structures,
overcoming
geometry
limitations
reducing
waste
production
compared
to
conventional
technologies.
Among
various
additive
technologies,
digital
light
processing
(DLP),
an
technology
used
print
photopolymer
parts,
using
projected
source
cure
entire
layer
at
once.
Initially
developed
for
pure
resins,
recent
advances
have
demonstrated
potential
DLP
in
polymerization
ceramic
metal-loaded
suspensions,
metal
components
after
proper
debinding
sintering.
Such
flexibility
increases
different
applications,
ranging
from
dental
implants
bone
scaffolds
smart
biomaterials
soft
robotics,
wearables,
microfluidic
devices.
The
review
provides
overview
its
advances;
specifically,
covers
properties,
metallic
feedstock
preparation,
light-matter
interaction
mechanism
underpinning
printing
post-processing
steps.
Finally,
description
current
application
provided
complemented
with
future
perspectives.
Dalton Transactions,
Journal Year:
2023,
Volume and Issue:
52(10), P. 2988 - 2998
Published: Jan. 1, 2023
Metal-organic
frameworks
(MOFs)
have
advanced
several
technologies.
However,
it
is
difficult
to
market
MOFs
without
processing
them
into
a
commercialized
structure,
causing
an
unnecessary
delay
in
the
material's
use.
Herein,
three-dimensional
(3D)
printing
of
cellulose/leaf-like
zeolitic
imidazolate
(ZIF-L),
denoted
as
CelloZIF-L,
reported
via
direct
ink
writing
(DIW,
robocasting).
Formulating
CelloZIF-L
3D
objects
can
dramatically
affect
properties
and,
consequently,
its
adsorption
efficiency.
The
process
simple
and
be
applied
solution
calcium
chloride.
synthesis
procedure
enables
formation
with
ZIF
content
84%.
integration
macroscopic
assembly
microscopic
properties,
i.e.,
hierarchical
structure
different
shapes,
such
cubes
filaments,
84%
loading
ZIF-L.
materials
adsorb
carbon
dioxide
(CO2)
heavy
metals.
exhibited
CO2
capacity
0.64-1.15
mmol
g-1
at
1
bar
(0
°C).
showed
Cu2+
capacities
389.8
±
14-554.8
15
mg
g-1.
They
displayed
selectivities
86.8%,
6.7%,
2.4%,
0.93%,
0.61%,
0.19%
toward
Fe3+,
Al3+,
Co2+,
Cu2+,
Na+,
Ca2+,
respectively.
high
efficiencies
reveal
promising
potential
our
for
industrial
applications.
Frontiers in Medical Technology,
Journal Year:
2023,
Volume and Issue:
5
Published: Feb. 7, 2023
3D
printing
enables
the
rapid
manufacture
of
patient-specific
anatomical
models
that
substantially
improve
patient
consultation
and
offer
unprecedented
opportunities
for
surgical
planning
training.
However,
multistep
preparation
process
may
inadvertently
lead
to
inaccurate
representations
which
impact
clinical
decision
making
detrimentally.
Here,
we
investigated
dimensional
accuracy
vascular
manufactured
via
digital
segmentation
Fused-Deposition
Modelling
(FDM),
Stereolithography
(SLA),
Selective
Laser
Sintering
(SLS),
PolyJet
printing,
respectively.
All
modalities
reliably
produced
hand-held
high
quality.
Quantitative
assessment
revealed
an
overall
error
0.20
±
3.23%,
0.53
3.16%,
-0.11
2.81%
-0.72
2.72%
FDM,
SLA,
SLS
printed
models,
respectively,
compared
unmodified
Computed
Tomography
Angiograms
(CTAs)
data.
Comparison
CTA
data
average
relative
-0.83
2.13%
resulting
from
processing.
Therefore,
print
modality
alone
were
0.76
2.88%,
+
0.90
2.26%,
1.62
2.20%
+0.88
1.97%,
Impact
on
absolute
measurements
feature
size
minimal
showed
a
propensity
be
marginally
underestimated.
This
study
level
3D-printed
suggesting
they
meet
requirements
used
as
medical
devices
applications.
Materials,
Journal Year:
2024,
Volume and Issue:
17(3), P. 769 - 769
Published: Feb. 5, 2024
Precision
manufacturing
requirements
are
the
key
to
ensuring
quality
and
reliability
of
biomedical
implants.
The
powder
bed
fusion
(PBF)
technique
offers
a
promising
solution,
enabling
creation
complex,
patient-specific
implants
with
high
degree
precision.
This
technology
is
revolutionizing
industry,
paving
way
for
new
era
personalized
medicine.
review
explores
details
3D
printing
its
application
in
field.
It
begins
an
introduction
3D-printing
various
classifications.
Later,
it
analyzes
numerous
fields
which
has
been
successfully
deployed
where
precision
components
required,
including
fabrication
scaffolds
tissue
engineering.
also
discusses
potential
advantages
limitations
using
terms
precision,
customization,
cost
effectiveness.
In
addition,
highlights
current
challenges
prospects
technology.
work
valuable
insights
researchers
engaged
field,
aiming
contribute
advancement
context
applications.
Advanced Materials Technologies,
Journal Year:
2023,
Volume and Issue:
8(23)
Published: Jan. 29, 2023
Abstract
Additive
manufacturing
continues
to
evolve
as
a
powerful
tool
for
the
fabrication
of
tissue‐engineered
scaffolds
and
medical
devices.
With
this
evolution,
library
materials
with
broad
range
mechanical
properties
degradation
behaviors
is
needed.
Photochemically
crosslinked
polymeric
systems
typically
possess
network
covalent
bonds
which
limit
their
degradability
serve
hinder
clinical
translation
devices
made
from
these
materials.
In
work,
use
ABA
triblock
poly(propylene
fumarate‐
b
‐γ‐methyl‐ε‐caprolactone‐
‐propylene
fumarate)
copolymers
coupled
degradable,
thiol‐based
crosslinking
system
on
continuous
liquid
interface
production
(CLIP)
digital
light
processing
(DLP)
3D
printer
reported.
The
printed
elastomeric
structures
experience
(strain
at
failure
spanning
55%
290%)
behavior
that
dependent
stoichiometry
individual
blocks
within
copolymer
alkene‐to‐thiol
ratios.
