Advanced Functional Materials,
Год журнала:
2024,
Номер
34(24)
Опубликована: Фев. 12, 2024
Abstract
Infrared
transmitting
materials
(IRTMs)
are
prone
to
mechanical
and
corrosion
damage
during
long‐time
exposure
harsh
outside
environments.
However,
conventional
IRTMs
frequently
lack
self‐repairability
that
limit
their
lifespan.
To
address
the
limitation,
thioctic
acid‐based
epoxy
resins
(TAEs)
developed
from
natural
acid
commercial
monomers.
The
double
ring‐opening
polymerization
(ROP)
reactions
of
groups
result
in
dual
dynamic
covalent
bonds
with
varying
bond
energies
containing
relatively
weak
disulfide
strong
ester
bonds.
As
compared
adaptable
networks
(CANs)
present
rapid
creep
properties
when
heated,
TAEs
maintain
geometric
stability
self‐repairing
at
a
mild
temperature
80
°C
by
enhancing
network
integrity
through
stable
crosslinking
points.
feature
renders
capability
while
maintaining
precise
geometrical
dimensions,
which
is
suitable
for
infrared
devices.
On
other
hand,
exhibit
high
near‐infrared
transmittance
(>80%).
Therefore,
demonstrate
they
can
be
used
as
superior
polymeric
IRTM.
Nature Communications,
Год журнала:
2023,
Номер
14(1)
Опубликована: Ноя. 24, 2023
Oral
ulcer
can
be
treated
with
diverse
biomaterials
loading
drugs
or
cytokines.
However,
most
patients
do
not
benefit
from
these
materials
because
of
poor
adhesion,
short-time
retention
in
oral
cavity
and
low
drug
therapeutic
efficacy.
Here
we
report
a
self-stabilized
water-responsive
deliverable
coenzyme
salt
polymer
poly(sodium
α-lipoate)
(PolyLA-Na)/coenzyme
poly(α-lipoic
acid)
(PolyLA)
binary
synergistic
elastomer
adhesive
patch,
where
hydrogen
bonding
cross-links
between
PolyLA
PolyLA-Na
prevents
depolymerization
slow
down
the
dissociation
PolyLA-Na,
thus
allowing
sustainable
delivery
bioactive
LA-based
small
molecules
durable
adhesion
to
mucosal
wound
due
action
PolyLA.
In
model
mice
mini-pig
ulcer,
patch
accelerates
healing
by
regulating
damaged
tissue
inflammatory
environment,
maintaining
stability
microbiota,
promoting
faster
re-epithelialization
angiogenesis.
This
provided
strategy
treat
ulcer.
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
62(11)
Опубликована: Янв. 5, 2023
Poly(1,2-dithiolane)s
are
a
family
of
intrinsically
recyclable
polymers
due
to
their
dynamic
covalent
disulfide
linkages.
Despite
the
common
use
thiolate-initiated
anionic
ring-opening
polymerization
(ROP)
under
basic
condition,
cationic
ROP
is
still
not
exploited.
Here
we
report
that
bond
can
act
as
proton
acceptor,
being
protonated
by
acids
form
sulfonium
cations,
which
efficiently
initiate
1,2-dithiolanes
and
result
in
high-molecular-weight
(over
1000
kDa)
poly(disulfide)s.
The
reaction
be
triggered
adding
catalytic
amounts
non-coordinating
anion
salts,
completed
few
minutes
at
room
temperature.
acidic
conditions
allow
applicability
for
monomers.
Importantly,
condition
open
air
without
inert
protection,
enabling
nearly
quantitative
chemical
recycling
from
bulk
materials
original
Advanced Functional Materials,
Год журнала:
2023,
Номер
33(49)
Опубликована: Июль 19, 2023
Abstract
α‐lipoic
acid
(LA),
a
coenzyme,
has
proved
to
have
excellent
antioxidant
and
antibacterial
activities;
however,
its
intrinsic
hydrophobicity
metastability
of
polyLA
remains
major
challenge
for
the
application
LA‐based
bulk
materials
in
biomedical
field.
Herein,
self‐stabilized
deep
eutectic
supramolecular
polymer
(
LA‐DESP)
adhesive
is
created
by
one‐step
heating
mixture
LA
sodium
α‐lipoate
(LA‐Na)
(S‐,
R‐isomer,
racemate)
without
introducing
any
exogenous
stabilizing
molecules.
The
underlying
effect
LA/LA‐Na
unveiled
be
originated
from
multiple
hydrogen
bonds
between
polyLA‐Na,
which
not
only
prevent
depolymerization
but
also
lower
melting
point
LA‐DESP
near
body
pathological
temperature.
Copolymerization
LA‐Na
slows
down
dissociation
thus
affording
sustainable
release
bioactive
small
molecules
satisfactory
functions.
Also,
exhibits
fast
tough
adhesion
diverse
substrates,
including
wet
tissues,
relying
on
situ
curing
property
rich
carboxyl
groups.
explored
as
tissue
sealant,
can
well
replace
surgical
suture
enhance
wound
healing
skin
incision
rat
model.
unprecedented
will
provide
new
strategy
development
bioadhesives.
ACS Materials Letters,
Год журнала:
2023,
Номер
5(2), С. 480 - 490
Опубликована: Янв. 13, 2023
The
hydrogen
bond,
one
of
the
simplest
and
most
versatile
noncovalent
interactions,
is
essential
for
many
dynamic
functions
in
living
systems.
After
long-term
fundamental
development,
H-bond
chemistry
has
been
well
established,
with
a
large
family
molecular
moieties
tunable
binding
affinities
available.
In
past
several
years,
growing
interest
polymeric
materials
aroused
series
emerging
applications
material
design.
This
Perspective
aims
at
discussing
design
principles
H-bond-based
by
summarizing
state
art
recently
emerged
materials.
Opportunities
challenges
are
proposed
to
provide
an
overview
this
research
topic,
possible
future
directions,
potential
applications.
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(24)
Опубликована: Фев. 12, 2024
Abstract
Infrared
transmitting
materials
(IRTMs)
are
prone
to
mechanical
and
corrosion
damage
during
long‐time
exposure
harsh
outside
environments.
However,
conventional
IRTMs
frequently
lack
self‐repairability
that
limit
their
lifespan.
To
address
the
limitation,
thioctic
acid‐based
epoxy
resins
(TAEs)
developed
from
natural
acid
commercial
monomers.
The
double
ring‐opening
polymerization
(ROP)
reactions
of
groups
result
in
dual
dynamic
covalent
bonds
with
varying
bond
energies
containing
relatively
weak
disulfide
strong
ester
bonds.
As
compared
adaptable
networks
(CANs)
present
rapid
creep
properties
when
heated,
TAEs
maintain
geometric
stability
self‐repairing
at
a
mild
temperature
80
°C
by
enhancing
network
integrity
through
stable
crosslinking
points.
feature
renders
capability
while
maintaining
precise
geometrical
dimensions,
which
is
suitable
for
infrared
devices.
On
other
hand,
exhibit
high
near‐infrared
transmittance
(>80%).
Therefore,
demonstrate
they
can
be
used
as
superior
polymeric
IRTM.
