Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 18, 2024
The
intrinsic
compromise
between
strength
and
toughness
in
composite
epoxy
resins
significantly
constrains
their
practical
applications.
In
this
study,
a
novel
strategy
is
introduced,
leveraging
interfacial
π-π
stacking
interactions
to
induce
the
"rolling
behavior"
of
microsphere
fillers,
thereby
facilitating
efficient
energy
dissipation.
This
approach
corroborated
through
theoretical
simulations
experimental
validation.
resulting
resin
demonstrates
an
impressive
49.8%
enhancement
remarkable
358.9%
improvement
compared
conventional
resins,
accompanied
by
substantially
reduced
hysteresis.
Moreover,
system
achieves
reversible
closed-loop
recyclability
rapid
repair
capabilities.
preliminary
demonstration
"force-temperature
equivalence"
further
establishes
pathway
for
design
high-performance
materials.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 14, 2025
Abstract
Room‐temperature
liquid
metals
(RTLMs)
exhibit
inherent
fluidity,
metallic
conductivity,
remarkable
stability,
and
recyclability,
which
indicate
significant
potential
for
applications
in
improving
the
efficiency
of
electronics
recycling
reducing
costs.
However,
low
viscosity
RTLMs
their
poor
interfacial
adhesion
to
substrates
typically
necessitate
utilization
intricate
fabrication
processes.
Here,
a
viscosity‐tunable,
photothermal
repairable,
full‐component
recyclable
eutectic
gallium–indium/epoxy‐modified
lignin/polyethylene
glycol
diacid/ethylene
vitrimer
(EGaIn‐LPEv)
is
presented
printed
circuits.
The
system
displays
good
stability
tunable
at
room
temperature
because
ultra‐high
reactive
site
content
modified
lignin
dual
dynamic
bonding
by
introduction
ethylene
glycol.
EGaIn‐LPEv‐based
circuit
exhibits
high
resolution
full
component
recovery
up
7.6
µm
98.3
wt.%,
respectively.
As
principal
component,
not
only
enhances
system's
green
credentials
but
also
endows
it
with
an
efficient
repairable
capability.
reconnection
damaged
can
be
achieved
15
s
through
808
nm
infrared
activation.
This
study
opens
new
avenue
development
manufacturing
processes
sustainable
application
advanced,
high‐resolution,
fully
recycled
electronic
devices.
In
order
to
reduce
dependence
on
petroleum
resources,
three
different
biobased
epoxy
monomers
(Eu-EP-1,
Eu-EP-2,
and
Eu-EP-3)
with
a
carbon
content
of
76.9%–83.3%
were
prepared
from
eugenol,
which
can
be
derived
lignin.
Three
eugenol-based
thermosets
(Eu-EP-1/IPDA,
Eu-EP-2/IPDA,
Eu-EP-3/IPDA)
then
obtained
by
curing
Eu-EP
monomer
commercial
IPDA
(isophorone
diamine)
hardener;
the
activation
energy
was
in
range
37.4–48.2
kJ/mol,
gel
ranged
95.4%–96.5%,
cross-linking
degree
reached
1185–2119
mol/m3,
confirming
that
cured
form
network
structures.
Therefore,
Eu-EP/IPDA
had
excellent
in-service
performance
Tg
63.9–76.3
°C
tensile
strength
34.7–43.1
MPa.
However,
permanent
chemical
bonds
difficult
recycle.
Since
Eu-EP-2/IPDA
balanced
performance,
Eu-EP-2
selected
develop
recyclable
Eu-EP/AFD
vitrimers
AFD
(4,4′-dithiodiphenylamine).
The
resulting
Eu-EP-2/AFD1.00
vitrimer
79.4
39.2
MPa,
remodeling
could
achieved
hot
pressing
at
200
for
6
h;
self-healing
scratched
material
heating
180
2
h,
dissolved
mercaptoethanol.
is
potential
sustainable
development
materials
recyclability.
This
study
offers
facile
solution
materials.
ACS Applied Materials & Interfaces,
Journal Year:
2025,
Volume and Issue:
17(9), P. 14578 - 14590
Published: Feb. 22, 2025
It
is
a
long-standing
challenge
for
thermoset
resins
to
simultaneously
achieve
outstanding
thermomechanical
and
mechanical
properties
as
well
rapid
network
reconfiguration
due
the
trade-off
between
chemical
bond
transformation
stability
of
network.
The
design
vitrimer
topology
an
effective
strategy
address
above
issues.
Here,
we
prepared
epoxy
material
(DGEBA-API-MHHPA)
with
excellent
high
glass-transition
temperature
(Tg)
by
introducing
rigid-flexible
integrated
side
chains
[1-(3-aminopropyl)
imidazole
(API)],
which
endow
DGEBA-API-MHHPA
multiple
interactions
including
"internal
antiplasticization"
effect,
intermolecular
hydrogen
bonds,
π-π
interactions.
Moreover,
introduction
Zn2+
facilitates
transesterification,
enabling
fast
rearrangement
Specifically,
relaxation
time
DGEBA-API0.2-MHHPA0.8-Zn
reaches
65
s
at
200
°C.
Meanwhile,
Zn2+-imidazole
coordination
bonds
energy
dissipation
improve
toughness
resulting
exhibits
self-healing
recyclable
behaviors
possesses
80.3
MPa
tensile
strength,
3.25
GPa
Young's
modulus,
7.2
MPa·m1/2
fracture
(KIC),
Tg
129
Concurrently,
can
be
applied
detachable
structural
adhesives
various
substrates
used
matrixes
electrically
composites.
This
skillful
widely
referenced
in
large-scale
manufacturing
high-performance
dynamic
covalent
their
composites
performance.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 22, 2025
Abstract
Carbon
fiber
reinforced
thermoplastics
(CFRTs)
have
witnessed
a
resurgence
in
recent
times
since
their
first
industrial
use
over
five
decades
ago,
with
revitalized
interest
from
aerospace
companies
and
other
key
sectors
including
energy
automotive
sectors.
CFRTs
are
increasingly
gaining
footholds
high
volume
rapid
manufacturing
nonaerospace
owing
to
inherent
recyclability.
However,
there
has
been
lack
of
contemporary
critical
review
on
this
topic
so
far.
This
work
aims
the
advances
emphasis
performance
thermoplastics.
Both
continuous
discontinuous
forms
tape,
organosheet
short/long
architectures
discussed,
processing
postprocessing
methods
reviewed,
state‐of‐the‐art
welding
techniques.
Typical
applications
industry
examined,
fuselage,
pressure
vessel,
components.
Finally,
insights
provided
into
ongoing
challenges,
future
development,
roadmap
for
expediting
development
high‐performance
CFRTs.
Journal of Applied Polymer Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 10, 2025
ABSTRACT
Developing
epoxy
resin
(EP)
with
satisfactory
comprehensive
properties
has
significant
prospects
in
high‐tech
industries,
but
achieving
this
goal
remains
a
challenge.
In
work,
macromolecular
flame
retardant
(PSi)
was
synthesized
using
vanillin,
phenylphosphonic
dichloride
(PPDC),
9,10‐dihydro‐9‐oxa‐10‐phospha‐phenanthrene
10‐oxide
(DOPO),
and
1,3‐bis(aminopropyl)tetramethyldisiloxane
(DAPTMS).
PSi
subsequently
utilized
to
fabricate
high‐performance
EP.
The
EP
2
wt%
(i.e.,
EP/PSi
)
exhibits
flame‐retardant
performance.
It
achieves
V‐0
rating
the
Underwriters
Laboratories‐94
(UL‐94)
test
limiting
oxygen
index
(LOI)
of
29.2%.
peak
heat
release
rate
(PHRR)
total
(THR)
decreased
by
~14.7%
~9.6%,
respectively.
Compared
unmodified
EP,
tensile
strength
impact
increase
~9.0%
~67.5%,
respectively,
while
maintaining
high
glass
transition
temperature
(
T
g
).
Moreover,
incorporation
significantly
enhances
UV‐shielding
without
sacrificing
its
transparency.
This
work
provides
an
integrated
strategy
for
developing
efficient
vanillin‐based
retardant.
fabricated
mechanical
robustness,
transparency,
broad
industrial
applications.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 26, 2025
Abstract
Epoxy
resins,
widely
recognized
for
their
stable
cross‐linked
structures
and
extensive
use
as
adhesives,
face
a
fundamental
challenge
in
balancing
high‐performance
attributes
with
dynamic
functionalities.
To
address
this,
novel
strategy
leveraging
synergistic
effects
is
proposed
to
amplify
bonds
within
the
resin
network.
Specifically,
an
ionic
monomer
featuring
imidazole
cations
benzene
rings
synthesized
combined
four‐arm
thiol‐containing
ester
groups,
forming
network
through
dual
curing
process.
This
design
endows
thermoset
multiple
stimuli‐responsive
The
groups
are
pivotal
enabling
resin's
degradability
reprocessability,
while
non‐covalent
cation‐π
interactions
significantly
enhance
energy
dissipation,
resulting
superior
mechanical
properties.
Notably,
not
only
lower
barrier
of
epoxy
thermal
reaction
but
also
accelerate
hydrolysis
via
hydrogen
bonding.
work
demonstrates
tunable
responsive
adhesive
cyclic
features,
offering
promising
candidate
functional
applications
devices
beyond.
innovative
integration
provides
versatile
platform
designing
next‐generation
resins
both
high
performance
full
life‐cycle
sustainability.
