Energetic Materials Frontiers,
Journal Year:
2024,
Volume and Issue:
5(2), P. 121 - 130
Published: May 22, 2024
Interfacial
strength
is
a
key
factor
affecting
the
mechanical
properties
of
materials.
This
study
aims
to
enhance
energetic
polymer
bonded
explosives
(PBXs)
by
modifying
1,3,5-triamino-2,4,6-trintrobenzene
(TATB)
crystals—a
typical
material—using
2-ureido-4[1H]-6-methyl-pyrimidinone
(UPy)
derivatives
with
strong
hydrogen-bonding
interactions.
Specifically,
strongly
adhesive
polydopamine
(PDA)
was
employed
graft
UPy-functionalized
molecules
isocyanate
groups
(-NCO)
and
hydroxyl
(-OH).
Scanning
electron
microscopy
(SEM)
images
indicate
that
TATB
crystals
became
rougher
after
being
coated
PDA,
while
introduction
UPy
did
not
affect
surface
morphology.
The
presence
urethane
bond
peaks
in
samples
indicates
UPy-NCO
successfully
grafted
onto
PDA.
essentially
nonpolar
prone
bind
binders,
having
potential
improve
creep
resistance
PBXs.
Due
interfacial
enhancement
tensile
compressive
sample
1
wt.%
significantly
increased
35.6%
26.5%,
respectively.
Theoretical
calculations
introduction,
where
hydrogen
bonding
may
produce
positive
impact.
successful
modified
nature
improved
its
strength,
finally
enhancing
conditions
for
grafting
reaction
this
are
mild
universal
thus
can
be
applied
other
compositions.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(36)
Published: April 27, 2024
Abstract
An
asymmetrical
wound
dressing
functions
akin
to
human
skin
by
serving
as
a
protective
barrier
between
and
its
immediate
environment.
However,
significant
challenges
persist
concerning
the
robust
adhesion
properties
of
hydrogels,
particularly
when
applied
in
emergency
hemostasis
healing
contexts.
Herein,
study
has
successfully
synthesized
hydrogel
patches
with
Janus
asymmetric‐adhesion,
denoted
HGO‐C,
exclusively
comprised
natural
polymers.
This
achievement
is
realized
through
assembly
adhesive
(HGO)
non‐adhesive
(CGC),
thereby
amalgamating
their
distinct
functionalities.
The
component
served
physical
shield
safeguarding
against
contamination,
while
hydrogel,
contacted
surface,
firmly
adhered
it,
swiftly
arresting
bleeding
facilitating
healing.
Cytocompatibility
tests,
hemolysis
antibacterial
assays,
coagulation
assays
demonstrated
excellent
biocompatibility,
antibacterial,
hemostatic
HGO‐C.
Finally,
vivo
experiments,
including
liver
hemorrhage
assay
assay,
unequivocally
showed
rapid
enhanced
capabilities
Consequently,
these
distinctive
patches,
derived
from
polymers
characterized
asymmetric
properties,
may
have
great
potential
for
real‐life
usage
clinical
patients.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(31)
Published: May 28, 2024
Understanding
psychology
is
an
important
task
in
modern
society
which
helps
predict
human
behavior
and
provide
feedback
accordingly.
Monitoring
of
weak
psychological
emotional
changes
requires
bioelectronic
devices
to
be
stretchable
compliant
for
unobtrusive
high-fidelity
signal
acquisition.
Thin
conductive
polymer
film
regarded
as
ideal
interface;
however,
it
very
challenging
simultaneously
balance
mechanical
robustness
opto-electrical
property.
Here,
a
40
nm-thick
based
on
photolithographic
double-network
mediated
by
graphene
layer
reported,
concurrently
enables
stretchability,
conductivity,
conformability.
Photolithographic
endow
the
photopatternability,
enhance
stress
dissipation
capability,
well
improve
conductivity
(4458
S
cm
Small Methods,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Jan. 29, 2024
Abstract
Nature
has
created
various
organisms
with
unique
chemical
components
and
multi‐scale
structures
(e.g.,
foot
proteins,
toe
pads,
suckers,
setose
gill
lamellae)
to
achieve
wet
adhesion
functions
adapt
their
complex
living
environments.
These
can
provide
inspirations
for
designing
adhesives
mediated
drug
release
behaviors
in
target
locations
of
biological
surfaces.
They
exhibit
conformal
enhanced
adhesion,
addressing
the
bottleneck
weaker
tissue
interface
presence
body
fluids.
Herein,
it
is
focused
on
research
progress
different
bioinspired
fabrications,
including
adhesive
protein‐based
inspired
mussel
adhesion);
capillarity
Stefan
surfaces
tree
frog
suction‐based
suckers
octopus'
interlocking
friction‐based
potential
mayfly
larva
teleost
adhesion).
Other
secreted
protein‐induced
also
reviewed
other
inspirations.
Notably,
one
representative
application
scenario
these
highlighted,
where
they
function
as
efficient
delivery
platforms
tissues
and/or
organs
requirements
both
controllable
optimized
release.
Finally,
challenges
future
presented.
Biomaterials Science,
Journal Year:
2024,
Volume and Issue:
12(9), P. 2282 - 2291
Published: Jan. 1, 2024
Polyphenolic
antibacterial
bio-adhesives
were
synthesised
via
polyphenols
and
acid
anhydrides
without
solvent
or
catalyst.
Upon
heating,
these
adhesives
could
induce
strong
adhesion
onto
various
substrates,
while
demonstrating
excellent
antibacterial,
antiinfection
biodegradability
properties.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: June 12, 2024
Abstract
Ultra-low
temperature
resistant
adhesive
is
highly
desired
yet
scarce
for
material
adhesion
the
potential
usage
in
Arctic/Antarctic
or
outer
space
exploration.
Here
we
develop
a
solvent-free
processed
low-temperature
tolerant
with
excellent
strength
and
organic
solvent
stability,
wide
tolerable
range
(i.e.
−196
to
55
°C),
long-lasting
effect
(
>
60
days,
°C)
that
exceeds
classic
commercial
hot
melt
adhesives.
Furthermore,
combine
experimental
results
theoretical
calculations,
strong
interaction
energy
between
polyoxometalate
polymer
main
factor
adhesive,
possessing
enhanced
cohesion
strength,
suppressed
crystallization
volumetric
contraction.
Notably,
manufacturing
at
scale
can
be
easily
achieved
by
facile
scale-up
processing,
showing
much
towards
practical
application
planetary
Small,
Journal Year:
2024,
Volume and Issue:
20(45)
Published: July 19, 2024
Abstract
Nature
serves
as
an
abundant
wellspring
of
inspiration
for
crafting
innovative
adhesive
materials.
Extensive
research
is
conducted
on
various
complex
forms
biological
attachment,
such
geckos,
tree
frogs,
octopuses,
and
mussels.
However,
significant
obstacles
still
exist
in
developing
materials
that
truly
replicate
the
behaviors
functionalities
observed
living
organisms.
Here,
overview
organs,
structures,
secretions
endowed
with
adhesion
capabilities,
delving
into
intricate
relationship
between
their
morphology
function,
potential
biomimicry
are
provided.
First,
design
principles
mechanisms
behavior
individual
organ
nature
summarized
from
perspective
structural
size
constraints.
Subsequently,
value
engineered
bioinspired
through
selective
application
cases
practical
fields
emphasized.
Then,
a
forward‐looking
gaze
conceivable
challenges
associated
opportunities
harnessing
biomimetic
strategies
advancing
material
innovation
highlighted
cast.
