ACS Nano,
Journal Year:
2024,
Volume and Issue:
18(12), P. 8906 - 8918
Published: March 14, 2024
Natural
polymeric-based
bioplastics
usually
lack
good
mechanical
or
processing
performance.
It
is
still
challenging
to
achieve
simultaneous
improvement
for
these
two
usual
trade-off
features.
Here,
we
demonstrate
a
full
noncovalent
mediated
self-assembly
design
simultaneously
improving
the
chitinous
bioplastic
and
properties
via
plane
hot-pressing.
Tannic
acid
(TA)
chosen
as
mediator
(i)
increase
cross-link
intensity
obtaining
tough
network
(ii)
afford
dynamic
cross-links
enable
mobility
of
chitin
molecular
chains
benefiting
nanostructure
rearrangement
during
shaping
procedure.
The
multiple
(chitin–TA
chitin–chitin
cross-links)
pressure-induced
orientation
nanofibers
structure
endow
with
robust
properties.
relatively
weak
chitin–TA
interactions
serve
water
mediation
switches
enhance
endowing
chitin/TA
hydroplastic
properties,
rendering
them
readily
programmable
into
versatile
2D/3D
shapes.
Moreover,
fully
natural
resourced
exhibits
superior
weld,
solvent
resistance,
biodegradability,
enabling
potential
diverse
applications.
physical
cross-linking
mechanism
highlights
an
effective
concept
balancing
processability
polymeric
materials.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(16)
Published: Jan. 6, 2024
Abstract
Electronic
waste
is
a
growing
threat
to
the
global
environment
and
human
health,
raising
particular
concerns.
Triboelectric
devices
synthesized
from
sustainable
degradable
materials
are
promising
electronic
alternative,
but
mechanical
mismatch
at
interface
between
polymer
substrate
electrodes
remains
unresolved
in
practical
applications.
This
study
uses
sulfhydryl
silanization
reaction
chemical
selectivity
site
specificity
of
thiol–disulfide
exchange
dynamic
covalent
chemistry
prepare
tough
monolithic‐integrated
triboelectric
bioplastic.
The
stress
dissipated
by
bond
adaptation
interaction,
which
makes
dielectric
layer
conductive
have
good
adhesion
effect
(220.55
kPa).
interfacial
interlocking
with
gives
bioplastic
excellent
tensile
strength
(87.4
MPa)
fracture
toughness
(33.3
MJ
m
−3
).
Even
when
subjected
tension
force
10
000
times
its
weight,
it
still
maintains
stable
output
no
visible
cracks.
provides
new
insights
into
design
reliable
environmentally
friendly
self‐powered
devices,
significant
for
development
flexible
wearable
electronics.
Chemical Reviews,
Journal Year:
2024,
Volume and Issue:
124(12), P. 7829 - 7906
Published: June 3, 2024
Covalent
network
polymers,
as
materials
composed
of
atoms
interconnected
by
covalent
bonds
in
a
continuous
network,
are
known
for
their
thermal
and
chemical
stability.
Over
the
past
two
decades,
these
have
undergone
significant
transformations,
gaining
properties
such
malleability,
environmental
responsiveness,
recyclability,
crystallinity,
customizable
porosity,
enabled
development
integration
dynamic
chemistry
(DCvC).
In
this
review,
we
explore
innovative
realm
polymers
focusing
on
recent
advances
achieved
through
application
DCvC.
We
start
examining
history
fundamental
principles
DCvC,
detailing
its
inception
core
concepts
noting
key
role
reversible
bond
formation.
Then
reprocessability
DCvC
is
thoroughly
discussed,
starting
from
milestones
that
marked
evolution
progressing
to
current
trends
applications.
The
influence
crystallinity
then
reviewed,
covering
diversity,
synthesis
techniques,
functionalities.
concluding
section,
address
challenges
faced
field
speculates
potential
future
directions.
ACS Nano,
Journal Year:
2023,
Volume and Issue:
17(21), P. 21420 - 21431
Published: Nov. 3, 2023
Its
excellent
renewability
and
biodegradability
make
cellulose
an
attractive
resource
to
prepare
fossil-based
plastic
alternatives.
However,
itself
exhibits
strong
intermolecular
hydrogen
bond
(H-bond)
interactions,
significantly
restricting
the
mobility
of
chains,
thus
leading
poor
thermo-processing
performance.
Here,
we
reconstructed
interactions
chains
via
replacing
original
H-bonds
with
dynamic
covalent
bonds.
By
this,
can
be
easily
thermo-processed
into
a
cellulosic
under
mild
conditions
(70
°C).
Through
adjusting
chemical
structure
networks,
shows
tunable
mechanical
strength
(3.0–33.5
MPa)
toughness
(43–321
kJ
m–2).
The
also
resistance
water,
organic
solvent,
acid
solution,
alkali
high
temperature
(>400
Moreover,
it
owns
good
biological
degradability
recyclability.
This
work
provides
effective
method
develop
high-performance
plastics
for
substitution.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: May 2, 2024
Abstract
The
development
of
multifunctional
bio‐adhesive
plays
a
critical
role
in
achieving
sustainable
society,
where
the
intrinsic
sensitivity
to
water
and
poor
dynamics
severely
bottlenecks
its
scale‐up
application.
Inspired
by
microstructure
dragonfly
wings,
strong
tough
adhesive
with
excellent
reprocessability
is
designed
developed
creating
dynamic
network
consisting
lignin
polyurea
(LPU)
framework
soybean
protein
(SP).
LPU
act
as
rigid
nervures
slow
crack
propagation
transfer
stress,
while
SP
dissipate
strain
energy
through
interplay
from
graded
hydrogen
imine
bonds
generated
between
SP.
achieves
significant
enhancements
fracture
toughness
resistance
≈7
23
folds,
respectively,
compared
Furthermore,
capacity
for
diffusion
restoration
endows
superior
reprocessability,
enabling
recycled
particleboard
achieve
high
retention
modules
(over
80%).
This
approach
offers
promising
eco‐friendly
alternative
conventional
petrochemical
adhesive.
