Biovitrimer
pads
with
high
flame
retardancy
and
thermal
conductivity
were
developed
using
tannic
acid
(TA),
phosphoric
(PA),
poly(vinyl
alcohol)
(PVA).
For
the
first
time,
it
was
discovered
that
this
type
of
pad
is
formed
through
dynamic
bonding
P–O–C
covalent
bonds.
The
vitrimer
transition
temperature
(Tv),
which
indicates
bonding,
controlled
within
74–91
°C
range
by
adjusting
TA,
PA,
PVA
composition
ratio.
Below
Tv,
exhibited
excellent
elastic
recovery
properties,
a
rate
over
90%
when
subjected
to
100%
strain.
material
demonstrated
tensile
strength
8
MPa
430%
elongation
at
break.
Interestingly,
samples
deformed
100
(above
Tv)
then
rapidly
cooled
showed
shape
memory
effect,
returning
their
original
form
reheated
above
Tv.
Thanks
in
vitrimer,
these
materials
achieved
limiting
oxygen
index
values
exceeding
55%
highest
V-0
rating
UL-94
test,
demonstrating
not
seen
existing
vitrimers.
Combining
biovitrimer
hexagonal
boron
nitride
(h-BN)
produced
composite
film
up
3.8
W/m·K,
proving
its
effectiveness
as
heat
dissipation
pad.
Additionally,
vitrimer's
properties
allowed
for
complete
both
h-BN
recycling.
A
closed-loop
recycling
process
same
performance
could
be
remanufactured
reclaimed
h-BN.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(22)
Published: March 16, 2024
Recycling
of
carbon
fiber-reinforced
polymer
composites
(CFRCs)
based
on
thermosetting
plastics
is
difficult.
In
the
present
study,
high-performance
CFRCs
are
fabricated
through
complexation
aromatic
pinacol-cross-linked
polyurethane
(PU-AP)
thermosets
with
fiber
(CF)
cloths.
PU-AP
exhibit
a
breaking
strength
95.5
MPa
and
toughness
473.6
MJ
m
Green Chemistry,
Journal Year:
2024,
Volume and Issue:
26(9), P. 5519 - 5530
Published: Jan. 1, 2024
High
biomass
content,
anti-flammable
and
degradable
epoxy
thermosets
were
prepared
by
curing
a
tyramine-derived
monomer
(TVEP)
with
furan-derived
diamine
(DFDA)
for
non-destructively
recyclable
carbon
fiber
composite
application.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
unknown
Published: July 20, 2024
Due
to
their
remarkable
features
of
lightweight,
high
strength,
stiffness,
high-temperature
resistance,
and
corrosion
carbon
fiber
reinforced
polymers
(CFRPs)
are
extensively
used
in
sports
equipment,
vehicles,
aircraft,
windmill
blades,
other
sectors.
The
urging
need
develop
a
resource-saving
environmentally
responsible
society
requires
the
recycling
CFRPs.
Traditional
CFRPs,
on
hand,
difficult
recycle
due
permanent
covalent
crosslinking
polymer
matrices.
combination
adaptable
networks
(CANs)
with
fibers
(CFs)
marks
new
development
path
for
closed-loop
recyclable
CFRPs
resins.
In
this
review,
we
summarize
most
recent
developments
from
unique
paradigm
dynamic
polymers,
CANs.
These
sophisticated
materials
diverse
functions,
oriented
towards
CFs
resin
sustainability,
further
categorized
into
several
active
domains
bonds,
including
ester
imine
disulfide
boronic
acetal
linkages,
etc.
Finally,
possible
strategies
future
design
CFPRs
by
combining
chemistry
innovation
interface
science
proposed.
Green Chemistry,
Journal Year:
2024,
Volume and Issue:
26(12), P. 7113 - 7122
Published: Jan. 1, 2024
The
unique
hyperbranched
structure
formed
from
tannic
acid
provides
both
robust
mechanical
properties
and
catalyst-free
recyclability
to
fully
biobased
transesterification
vitrimers.
ACS Applied Polymer Materials,
Journal Year:
2024,
Volume and Issue:
6(7), P. 3894 - 3908
Published: March 21, 2024
In
the
present
scenario,
petroleum
resource-based
thermoset
materials
have
become
an
environmental
threat
due
to
their
permanent
cross-linked
structure
that
limits
recyclability.
To
overcome
this
problem,
development
of
covalent
adaptable
networks
(CANs)
containing
dynamic
bonds
has
emerged
in
recent
years
can
be
recycled
under
suitable
conditions.
However,
fully
biobased
as
well
recyclable
CANs
following
a
green
synthetic
protocol
is
yet
great
challenge
and
dream
toward
sustainable
environment.
With
goal,
here,
we
report
CAN
films
from
acrylated
castor
oil
(a
low-cost
vegetable
derivative)
cystamine
diamine)
via
catalyst-free
aza-Michael
reaction
using
disulfide
linkage
bond.
The
show
excellent
thermoself-healing
behavior
recyclability
for
at
least
10
cycles
while
maintaining
material
properties.
addition,
catalytically
degraded,
which
further
reprocessed
reconstruct
films.
Furthermore,
are
hydrophobic
nature,
indicating
these
useful
protective
surface
coating
applications.
Therefore,
proof
concept,
demonstrate
anticorrosive
properties
film
having
maximum
water
contact
angle
102.4°,
analyzed
by
polarization
method,
electrochemical
impedance,
salt
spray
fog
test
corrosive
This
work
provides
economical
environmentally
friendly
route
develop
multifunctional
future.
ACS Applied Polymer Materials,
Journal Year:
2024,
Volume and Issue:
6(14), P. 8159 - 8168
Published: July 12, 2024
Epoxy
vitrimers
combine
the
advantages
of
thermosetting
and
thermoplastic
materials,
making
them
an
ideal
alternative
to
traditional
resins.
However,
fabrication
high-performance
flame-retardant
epoxy
remains
a
challenge.
In
this
study,
utilizing
(2-carboxyethyl)phenylphosphinic
acid
(CEPPA)
as
curing
agent,
we
facilely
fabricated
dual-dynamic
vitrimer
incorporating
carboxylate
esters
phosphonate
(CEEP).
Compared
resin
(DDEP),
exhibited
tensile
strength
comparable
resins
significantly
outperformed
in
terms
Young's
modulus.
comparison
ester
(PAEP),
CEEP
demonstrated
improved
solvent
resistance
ability
for
recycling
without
need
catalyst.
Additionally,
outstanding
flame
retardancy,
achieving
V-0
rating
UL-94
testing,
with
remarkable
66.9%
reduction
peak
heat
release
rate
(PHRR)
significant
34.5%
decrease
total
(THR)
cone
calorimetry
test
compared
DDEP.
The
work
offers
promising
way
facile
vitrimers.
