Virtual and Physical Prototyping,
Год журнала:
2022,
Номер
17(3), С. 734 - 748
Опубликована: Апрель 7, 2022
Mechanical
anisotropy
greatly
influences
the
applications
of
materials
printed
by
additive
manufacturing
techniques
such
as
Multi
Jet
Fusion
(MJF)
and
selective
laser
sintering.
However,
mechanical
MJF-printed
fibre–reinforced
polymer
composites
has
not
been
well
understood.
In
this
work,
effect
fibre
length
on
performance
glass
polyamide
12
(GF/PA12)
is
systematically
investigated.
Both
experimental
simulation
results
confirm
that
longer
fibres
are
in
favour
alignment
powder
spreading
direction.
The
composite
parts
with
exhibit
higher
porosity.
When
GFs
an
average
226
μm
added,
ultimate
tensile
strength
modulus
measured
bed
direction
remarkably
improved
51%
326%,
respectively,
compared
those
neat
PA12
specimens.
This
work
provides
guidance
for
printing
other
high-strength
composites.
Advanced Functional Materials,
Год журнала:
2023,
Номер
34(14)
Опубликована: Дек. 24, 2023
Abstract
Shape
memory
polymers
(SMPs)
are
one
of
the
primary
directions
in
development
modern
high‐tech
new
materials,
which
integrated
with
sensing,
actuation,
information
processing,
and
autonomous
deformation.
Here,
multifunctional
shape
focused
a
detailed
introduction
to
characteristics
self‐deformation,
self‐sensing,
self‐healing,
self‐learning
is
provided.
Integrating
other
functional
materials
form
polymer
composites
(SMPC),
designing
controlling
material
structure
organization
at
microscale,
thereby
achieving
more
precise
controllable
effects
expanding
potential
applications.
Ultimately,
it
shown
that
SMPs
their
have
wide
range
fascinating
applications
fields
robotics,
smart
clothing,
textiles,
biomedical
devices,
wearable
technology.
will
thus
continue
play
significant
role
future
deeper
exploration.
Advanced Materials,
Год журнала:
2024,
Номер
36(34)
Опубликована: Март 5, 2024
4D
printing
has
attracted
tremendous
worldwide
attention
during
the
past
decade.
This
technology
enables
shape,
property,
or
functionality
of
printed
structures
to
change
with
time
in
response
diverse
external
stimuli,
making
original
static
alive.
The
revolutionary
4D-printing
offers
remarkable
benefits
controlling
geometric
and
functional
reconfiguration,
thereby
showcasing
immense
potential
across
fields,
including
biomedical
engineering,
electronics,
robotics,
photonics.
Here,
a
comprehensive
review
latest
achievements
using
various
types
materials
different
additive
manufacturing
techniques
is
presented.
state-of-the-art
strategies
implemented
harnessing
4D-printed
are
highlighted,
which
involve
design,
functionalities,
applications.
machine
learning
approach
explored
for
also
discussed.
Finally,
perspectives
on
current
challenges
future
trends
toward
further
development
summarized.
Advanced Materials,
Год журнала:
2024,
Номер
36(31)
Опубликована: Апрель 5, 2024
Abstract
4D
(bio‐)printing
endows
3D
printed
(bio‐)materials
with
multiple
functionalities
and
dynamic
properties.
materials
have
been
recently
used
in
biomedical
engineering
for
the
design
fabrication
of
devices,
such
as
stents,
occluders,
microneedles,
smart
3D‐cell
engineered
microenvironments,
drug
delivery
systems,
wound
closures,
implantable
medical
devices.
However,
success
printing
relies
on
rational
objects,
selection
materials,
availability
appropriate
types
external
(multi‐)stimuli.
Here,
this
work
first
highlights
different
stimuli,
strategies
(bio‐)printing.
Then,
it
presents
a
critical
review
applications
discusses
future
directions
research
exciting
area,
including
vivo
tissue
regeneration
studies,
implementation
reversible
shape
memory
behaviors,
creation
fast
shape‐transformation
responses,
ability
to
operate
at
microscale,
untethered
activation
control,
application
(machine
learning‐based)
modeling
approaches
predict
structure–property
design–shape
transformation
relationships
(bio)printed
constructs.
International Journal of Extreme Manufacturing,
Год журнала:
2023,
Номер
5(3), С. 032011 - 032011
Опубликована: Июнь 22, 2023
Highlights
The
key
technological
roadmap
for
implementation
of
4D
printing
is
comprehensively
summarized.
Material-structure-functionality
integrated
aspects
in
are
emphasized.
links
between
smart
materials,
3D
techniques,
structures,
stimulus,
and
new
functionalities
multidisciplinary
applications
established.
General
approaches
to
designing
programmable
structures
introduced.
Deleted Journal,
Год журнала:
2024,
Номер
3(1), С. 200115 - 200115
Опубликована: Янв. 26, 2024
"Life"
represents
a
distinctive
attribute
inherent
to
organisms
in
nature,
evident
their
capacity
actively
adapt
changes
environment.
In
contrast
the
static
and
intricate
constructs
of
additive
manufacturing
(AM),
dynamic
structure
4D
printing
(4DP)
adeptly
integrates
AM
technology,
responsive
mechanisms,
external
stimuli,
imbuing
it
with
semblance
"life."
This
fusion
significantly
broadens
its
functional
applications
across
biomedicine,
actuators,
metamaterials.
The
escalating
demand
diverse
fields
necessitates
heightened
criteria
for
4DP,
encompassing
rapid
response,
multi-stimulus
large
shape
change,
specific
mechanical
properties
(e.g.,
high
strength,
modulus)
capable
accommodating
varying
environmental
conditions.
recent
years,
memory
polymers
(SMPs)
have
garnered
increasing
attention
among
4DP
researchers
due
ease
design
preprogramming
at
molecular
level,
facilitating
controlled
transformations
along
predictable
pathways.
However,
high-strength
SMPs,
as
an
indispensable
part
high-performance
field,
is
full
challenges
because
intrinsic
raw
materials
are
not
well
compatible
principle
printed
configuration
flexible
enough.
Consequently,
this
paper
provides
concise
overview
response
mechanisms
five
prominent
SMPs
utilized
4DP:
epoxy
resin,
poly(ether-ether-ketone),
polyimide,
polylactic
acid,
polyurethane.
Additionally,
delves
into
associated
prospects,
offering
valuable
insights
potential
value
within
domain
4DP.
Laser & Photonics Review,
Год журнала:
2024,
Номер
18(7)
Опубликована: Март 26, 2024
Abstract
Lasers
are
instrumental
in
enabling
precise
processing
and
fostering
the
development
of
new
technologies.
Particularly,
ultrafast
lasers,
due
to
their
unique
interaction
with
matter,
can
achieve
not
only
exceptional
spatial
precision
but
also
meticulously
determine
degree
modification.
A
prime
example
this
is
laser‐based
3D
printing
through
multi‐photon
lithography
(MPL).
This
approach
remarkably
enables
true
structures
at
micro‐
nanoscale,
without
need
for
masks
or
cumbersome
tools,
simply
by
using
computer‐aided
designs.
Owing
these
capabilities,
MPL
has
emerged
as
a
powerful
manufacturing
technique
across
various
multidisciplinary
fields.
The
ongoing
growth
MPL's
utilization
led
notable
advancements
highly
complex
on
different
substrates,
well
improvements
resolution
throughput,
novel
photosensitive
materials,
which
impressively
facilitated
expansion
into
broader
fields
over
last
few
years.
In
perspective
article,
aim
highlight
recent
trends
MPL.
current
challenges
will
be
explored,
addressed
ensure
its
further
integration
advanced
Additive
Manufacturing
nanoscale.
future
perspectives
opportunities
discussed.
Nature Materials,
Год журнала:
2024,
Номер
23(4), С. 560 - 569
Опубликована: Фев. 9, 2024
Abstract
Microactuators
provide
controllable
driving
forces
for
precise
positioning,
manipulation
and
operation
at
the
microscale.
Development
of
microactuators
using
active
materials
is
often
hampered
by
their
fabrication
complexity
limited
motion
small
scales.
Here
we
report
light-fuelled
artificial
goosebumps
to
actuate
passive
microstructures,
inspired
natural
reaction
hair
bristling
(piloerection)
on
biological
skin.
We
use
light-responsive
liquid
crystal
elastomers
as
responsive
skin
move
three-dimensionally
printed
polymer
microstructures.
When
exposed
a
programmable
femtosecond
laser,
elastomer
generates
localized
goosebumps,
resulting
in
actuation
surrounding
Such
microactuation
can
tilt
micro-mirrors
controlled
light
reflection
disassemble
capillary-force-induced
self-assembled
microstructures
globally
locally.
demonstrate
potential
application
proposed
system
information
storage.
This
methodology
provides
precise,
opening
new
possibilities
development
micromachines.
Interdisciplinary materials,
Год журнала:
2022,
Номер
1(4), С. 507 - 516
Опубликована: Июль 5, 2022
Abstract
Polydimethylsiloxane
(PDMS)
has
been
widely
used
in
flexible
electronics,
soft
robotics,
and
bioelectronics.
However,
the
fabrication
of
PDMS‐based
devices
mostly
relied
on
conventional
approaches,
such
as
casting
molding,
thereby
limiting
their
potential.
Here
we
fabricate
composites
with
programmable
microstructures
by
direct
ink
writing
realize
practical
functionalities
four‐dimensional
(4D)
printing.
The
mechanical,
thermomechanical
magnetic
properties
three‐dimensional‐printed
can
be
well
tailored
using
carbon,
metal,
or
ceramic
functional
fillers.
By
taking
advantage
printable,
flexible,
PDMS
composites,
demonstrate
new
4D
printing
designing
architectures,
including
magnetic‐field‐driven
battery
cases
patchworks,
arbitrary
morphing
structures.
In
particular,
4D‐printed
batteries
are
constructed
for
first
time,
which
actuated
via
external
field.
This
study
broadens
paradigm
prospective
applications,
implant
batteries,
biomimetic
engineering,
customized
biomedical
devices.
