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.
Journal of Materials Chemistry A,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
Colorimetric
indicators
monitor
environmental
factors
such
as
oxygen,
water,
and
temperature
by
utilizing
the
intrinsic
color
changes
that
accompany
quenching
process
of
free
radicals.
ACS Applied Polymer Materials,
Journal Year:
2024,
Volume and Issue:
6(22), P. 13916 - 13926
Published: Nov. 8, 2024
According
to
the
political
and
ethical
demands
of
our
times,
scholars
industries
are
pushed
search
for
sustainable
solutions,
i.e.,
design
recyclable,
reusable,
or
degradable
materials.
The
challenge
is
go
beyond
conventional
epoxy
networks
based
on
visphenol
A
diglycidyl
ether
(DGEBA),
which
firstly
contain
bisphenol
(BPA)
secondly
cannot
be
recycled.
Here,
a
generation
recyclable
thermosets
was
designed
developed
first
time
from
copolymerization
between
tri-
tetra-IL
monomers
containing
cleavable
bonds
with
anhydride
(MTHPA)
without
presence
metallic
ionic
liquid
(MIL).
Thus,
influence
these
MIL
curing
kinetics,
conversion,
physical
properties
resulting
assessed.
In
particular,
combination
two
has
proved
powerful
tool
tailor
architecture–physical
property
relationships
IL-modified
produce
networks.
As
consequence,
glass
transition
temperature
Tg
ranged
60
140
°C,
while
mechanical
performances
varied
2.5
3.5
GPa,
combined
thermal
stability
up
330
°C.
Then,
were
subjected
recycling
(a
solvent-free
method,
hot-pressed
process)
chemical
process
using
dissolution
in
ethylene
glycol
repolymerization
at
150
Finally,
all
showed
their
ability
recycled,
highly
dependent
network
architecture.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 30, 2024
Abstract
Epoxy
resins,
by
showing
outstanding
performances,
stand
out
as
the
most
applied
materials
in
thermoset
products.
However,
their
excellent
properties,
associated
with
covalently
cross‐linked
structures,
come
at
expense
of
recyclability,
thus
posing
environmental
and
regulatory
challenges.
Herein,
starting
from
recently
explored
reversibility
robust
poly(β‐amino
amide)s,
dynamic
curing
agents
are
synthesized
a
one‐pot
procedure
for
use
preparation
epoxy‐derived
networks.
The
obtained
retain
desirable
properties
while
being
fully
(re)processable,
high
temperature‐dependent
viscoelasticity
(activation
energy
(E
)
≈230
to
270
kJ
mol
−1
).
Moreover,
this
new
generation
epoxy
shows
resistance
hydrolysis
creep
elevated
temperatures
(up
120
°C).
As
an
entry
point
further
applications,
reversible
implemented
adhesive
formulations,
showcasing
lap
shear
strengths
that
comparable
commercial
hardeners
9
MPa).
β‐amino
amide
groups
provide
adhesives
additional
functionality
heat‐triggered
deconstruction
(130
150
°C),
re‐bonding
capacity
up
80%
recovery
lap‐shear
strength.
To
encourage
industrial
adoption,
cost‐effective,
drop‐in
synthesis
protocol
is
developed
using
only
bulk
chemicals,
hence
facilitating
practical
implementation.
Polymers,
Journal Year:
2024,
Volume and Issue:
16(23), P. 3254 - 3254
Published: Nov. 22, 2024
Considering
the
demand
for
construction
of
a
sustainable
future,
it
is
essential
to
endow
conventional
thermoset
silicone
adhesive
with
reuse
capability
and
recyclability.
Although
various
research
attempts
have
been
made
by
incorporating
reversible
linkages,
developing
adhesives
natural
linkers
still
challenging,
as
interface
between
linker
historically
difficult.
We
exploited
possibility
utilizing
Employing
epoxy
resins
containing
dynamic
covalent
bonds
to
fabricate
carbon
fiber-reinforced
polymer
(CFRP)
composite
materials
provides
a
solution
solve
the
challenge
that
traditional
resin
composites
are
difficult
degrade
and
recycle.
The
curing
reaction
between
anhydride
monomer
will
generate
hydroxyl
ester
groups,
which
can
undergo
transesterification,
endowing
with
degradation
performance.
Large
amounts
of
catalysts
an
extra
alcoholic
compound
often
required
break
down
cross-linked
networks
for
complete
degradation,
results
in
separation
degraded
product.
To
this
dilemma,
we
synthesized
autocatalytic
high-performance
recyclable
tensile
strength
91.9
MPa,
Young's
modulus
2.85
GPa,
Tg
91.3
°C.
fully
cured
be
completely
hot
N,N-dimethylformamide
due
fast
exchange
β-hydroxyl
autocatalyzed
by
formed
ternary
amine
network,
may
induce
loop
formation
result
degradation.
This
also
endows
fabricated
CFRP
strong
interlaminar
shear
58.65
MPa
excellent
self-healing
capacity
healing
efficiency
99.5%.
Moreover,
after
being
heated
at
140
°C
20
min.
recycled
fibers
reused
new
properties
comparable
those
original
ones.
product
into
polyurethane
mechanical
performance,
realizing
full
recycling
materials.
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.
