Nature Communications,
Год журнала:
2022,
Номер
13(1)
Опубликована: Сен. 5, 2022
Low-molecular-weight
adhesives
(LMWAs)
possess
many
unique
features
compared
to
polymer
adhesives.
However,
fabricating
LMWAs
with
adhesion
strengths
higher
than
those
of
polymeric
materials
is
a
significant
challenge,
mainly
because
the
relatively
weak
and
unbalanced
cohesion
interfacial
adhesion.
Herein,
an
ionic
liquid
(IL)-based
adhesive
high
strength
demonstrated
by
introducing
IL
moiety
into
Y-shaped
molecule
replete
hydrogen
bonding
(H-bonding)
interactions.
The
moieties
not
only
destroyed
rigid
ordered
H-bonding
networks,
releasing
more
free
groups
form
bonds
(H-bonds)
at
substrate/adhesive
interface,
but
also
provided
electrostatic
interactions
that
improved
energy.
synthesized
IL-based
adhesive,
Tri-HT,
could
directly
thin
coatings
on
various
substrates,
up
12.20
MPa.
Advanced
electrical
conductivity,
self-healing
behavior,
electrically-controlled
be
fabricated
combining
Tri-HT
carbon
nanotubes.
Green Chemistry,
Год журнала:
2023,
Номер
25(6), С. 2241 - 2261
Опубликована: Янв. 1, 2023
The
substitution
of
phenol
by
lignin
not
only
reduces
the
feedstock
cost
resin
synthesis
but
also
improves
resin's
physicochemical
properties
and
endues
with
new
functions.
Advanced Functional Materials,
Год журнала:
2023,
Номер
33(9)
Опубликована: Фев. 1, 2023
Adhesive
materials
have
recently
drawn
intensive
attention
due
to
their
excellent
sealing
ability,
thereby
stimulating
advances
in
science
and
industrial
usage.
However,
reported
adhesives
usually
exhibit
weak
adhesion
strength,
require
high
pressure
for
strong
bonding,
display
severe
deterioration
various
harsh
environments.
In
this
work,
instead
of
water
or
organic
solvents,
a
deep
eutectic
solution
(DES)
was
used
as
the
medium
photopolymerization
zwitterionic
polarized
monomers,
thus
generating
novel
ionogel
with
tunable
mechanical
properties.
Multiple
hydrogen
bonds
electrostatic
interactions
between
DES
monomers
facilitated
ultrafast
gelation
instant
bonding
without
any
external
pressure,
which
rarely
previously.
Furthermore,
different
environments
(e.g.,
water,
acidic
basic
buffers,
saline
solutions)
onto
hydrophilic
glass
tissues)
hydrophobic
polymethyl
methacrylate,
polystyrene,
polypropylene)
adherends
demonstrated.
Also,
stretchability
at
extreme
temperatures
(-80
80
°C)
indicated
its
widespread
applications.
biocompatible
showed
burst
stomach
intestine
tissues
prevent
liquid
leakage,
highlighting
potential
an
adhesive
patch.
This
provides
unprecedented
opportunities
fields
packaging
industry,
marine
engineering,
medical
adhesives,
electronic
assembly.
Polyacrylic
acid
(PAA)
and
its
derivatives
are
commonly
used
as
essential
matrices
in
wound
dressings,
but
their
weak
wet
adhesion
restricts
the
clinical
application.
To
address
this
issue,
a
PAA-based
coacervate
hydrogel
with
strong
capability
is
fabricated
through
facile
mixture
of
PAA
copolymers
isoprenyl
oxy
poly(ethylene
glycol)
ether
tannic
(TA).
The
segments
on
prevent
electrostatic
repulsion
among
ionized
carboxyl
groups
absorbed
TA
to
form
coacervates.
provides
solid
dry
substrates
via
multifarious
interactions,
which
endows
an
adhesive
strength
skin
23.4
kPa
70%
underwater.
This
achieves
desirable
self-healing
extensible
properties
suitable
for
frequently
moving
joints.
These
investigations
prove
that
has
antibacterial
activity,
facilitates
fibroblast
migration,
modulates
M1/M2
polarization
macrophages.
In
vivo
hemorrhage
experiments
further
confirm
dramatically
shortens
hemostatic
time
from
hundreds
tens
seconds.
addition,
full-thickness
defect
demonstrate
best
therapeutic
effect
by
significantly
promoting
collagen
deposition,
angiogenesis,
epithelialization.
results
promising
dressing
medical
translation.
Achieving
robust
underwater
adhesion
by
bioadhesives
remains
a
challenge
due
to
interfacial
water.
Herein
coacervate-to-hydrogel
strategy
enhance
water
repulsion
and
bulk
of
is
reported.
The
polyethyleneimine/thioctic
acid
(PEI/TA)
coacervate
deposited
onto
substrates,
which
can
effectively
repel
completely
spread
into
substrate
surface
irregularities
its
liquid
water-immiscible
nature.
physical
interactions
between
further
adhesion.
Furthermore,
driven
the
spontaneous
hydrophobic
aggregation
TA
molecules
strong
electrostatic
interaction
PEI
TA,
turn
hydrogel
in
situ
within
minutes
without
additional
stimuli
develop
enhanced
matrix
cohesion
on
diverse
substrates.
Molecular
dynamics
simulations
reveal
atomistic
details
formation
wet
PEI/TA
via
multimode
interactions.
Lastly,
it
demonstrated
that
coacervate-derived
blood
therefore
efficiently
deliver
carried
growth
factors
at
wound
sites,
thereby
enhancing
healing
an
animal
model.
advantages
including
body
fluid-immiscibility,
adhesion,
adaptability
fit
irregular
target
excellent
biocompatibility
make
promising
bioadhesive
for
biomedical
applications.
Nature Communications,
Год журнала:
2022,
Номер
13(1)
Опубликована: Сен. 5, 2022
Low-molecular-weight
adhesives
(LMWAs)
possess
many
unique
features
compared
to
polymer
adhesives.
However,
fabricating
LMWAs
with
adhesion
strengths
higher
than
those
of
polymeric
materials
is
a
significant
challenge,
mainly
because
the
relatively
weak
and
unbalanced
cohesion
interfacial
adhesion.
Herein,
an
ionic
liquid
(IL)-based
adhesive
high
strength
demonstrated
by
introducing
IL
moiety
into
Y-shaped
molecule
replete
hydrogen
bonding
(H-bonding)
interactions.
The
moieties
not
only
destroyed
rigid
ordered
H-bonding
networks,
releasing
more
free
groups
form
bonds
(H-bonds)
at
substrate/adhesive
interface,
but
also
provided
electrostatic
interactions
that
improved
energy.
synthesized
IL-based
adhesive,
Tri-HT,
could
directly
thin
coatings
on
various
substrates,
up
12.20
MPa.
Advanced
electrical
conductivity,
self-healing
behavior,
electrically-controlled
be
fabricated
combining
Tri-HT
carbon
nanotubes.
