ACS Sustainable Chemistry & Engineering,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 4, 2024
A
simple
and
feasible
method
to
prepare
fully
biobased
hydrogels
with
high
mechanical
strength
toughness
remains
a
great
challenge.
Herein,
different
types
of
long-chain
chemical
cross-linking
agents,
epoxy
vegetable
oils,
were
used
in
combination
double
strategy
cellulose
hydrogels,
their
feasibility
as
electrolyte
materials
for
flexible
energy
storage
devices
was
investigated.
Through
continuous
physical
cross-linking,
these
achieved
water
contents
(60–80%)
excellent
properties
(under
the
same
conditions,
maximum
strain
can
reach
290%
under
tension
9.8
MJ
m–3
58%
0.6
compression).
At
time,
due
inherent
hydrophobicity
oil,
hydrophobic
stacking
chains
increased,
thereby
promoting
self-assembly
recrystallization
subsequent
process,
resulting
unique
nanoporous
structure
internal
cross-linked
network.
After
being
immersed
electrolyte,
ionic
conductivity
at
room
temperature
35.4
mS
cm–1.
In
addition,
assembled
corresponding
zinc-ion
hybrid
capacitor
showed
ability
power
wearable
electronic
devices.
Hence,
this
study
provides
new
approach
construction
strong
tough
applications
field
or
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(34)
Опубликована: Март 20, 2024
Abstract
The
application
of
gel
wearable
sensors
in
aquatic
environments
is
very
promising,
however,
the
preparation
underwater
with
excellent
anti‐swelling
properties
and
sensing
performance
remains
a
great
challenge.
In
this
paper,
solvent
exchange
strategy
proposed
to
fabricate
an
gel,
which
hydrophobic
segments
are
induced
gather
microphase
separation
occurs
inside
gel.
prepared
possesses
(swelling
ratio
4.79%),
good
mechanical
(tensile
strain
712%),
high
sensitivity
(GF
=
1.07),
linearity
(R
2
0.998,
0
70%
range).
Moreover,
it
can
achieve
stability
(more
than
90
days)
fatigue
resistance
(1000
cycles
at
50%
strain)
as
sensor.
Therefore,
designed
be
utilized
for
monitoring
human
motion
information,
distress
smart
alarms,
revealing
potential
field
sensors.
ACS Applied Polymer Materials,
Год журнала:
2024,
Номер
6(11), С. 6603 - 6613
Опубликована: Июнь 5, 2024
A
high
strength,
swelling
resistance,
and
conductive
hydrogel
with
excellent
photothermal
effect
antimicrobial
property
is
prepared
based
on
a
cellulose
frame.
First,
dissolved
in
NaOH/urea
aqueous
solution.
The
solution
self-assembled
an
ethanol
environment
to
form
frame
then
immersed
the
acrylamide
(AM)
2-methylacryloxyethyl
phosphocholine
(MPC)
Cel-PAxMy
by
situ
copolymerization
of
AM
MPC.
Lastly,
soaked
tannic
acid/ferric
chloride
(TA@Fe3+)
prepare
TA@Fe3+-Cel-PAxMy
hydrogel.
obtained
shows
mechanical
strength
(toughness
600
KJ/m3,
Young's
modulus
225
KJ/m3)
due
presence
rigid
introduction
TA@Fe3+
not
only
increases
cross-linking
density
hydrogels,
making
hydrogels
have
extraordinary
resistance
(swelling
ratio
50
±
20%),
but
also
endows
electrical
conductivity
(conductivity
1.0
S/m,
GF
0.75,
response
time
572.27
ms),
good
near-infrared
effect,
outstanding
property.
This
work
proposes
effective
strategy
for
development
zwitterionic
hydrogel,
which
exhibits
significant
promise
wearable
sensors
electronic
devices.
ACS Applied Energy Materials,
Год журнала:
2024,
Номер
7(9), С. 4040 - 4049
Опубликована: Май 1, 2024
The
function
of
polymer
hydrogel
electrolytes
has
been
limited
by
external
force,
fracture
formation,
and
cryogenic
freezing.
dual-network
1
(1-pyrenemethanol)-poly(vinyl
alcohol)
(PVA)
/K+-Kappa
carrageenan
(KC)
organogel
with
self-healing,
antifreezing,
fluorescent
acid–base
ion
response
were
prepared
using
the
one-pot
method.
tensile
strength,
rate,
capacitance,
energy
density
627
kPa,
668%,
190
F
g–1,
9.63
Wh
kg–1,
respectively.
As
supercapacitors
have
high
toughness
flexibility,
they
can
maintain
stable
output
under
various
deformations
such
as
compression,
bending
perforating.
Based
on
thermal
reversibility
KC
synergistic
effect
hydrogen
bond
between
PVA,
organogels
exhibit
remarkable
self-healing
properties
a
capacitance
retention
85.3%
after
5
cut/healing
cycles.
Furthermore,
excellent
antifreeze
properties,
72.5%
at
−65
°C
for
20
days.
Organogels
be
used
information
writing
anticounterfeiting
via
H+/OH–
fluorescence
metal
(Co3+
Fe3+)
response.
Such
safe
capacitors
broad
application
prospects
in
portable
wearable
electronic
products.
ACS Applied Polymer Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 6, 2025
The
development
of
adhesives
with
switchable
and
programmable
adhesion
in
both
air
water
environments
is
highly
desirable
but
still
difficult
to
realize.
Here,
we
have
developed
a
smart
hydrogel
reversible
behavior
under
thermal
stimuli
by
introducing
thermally
responsive
hydroxypropyl
cellulose
(HPC)
polymer
unit
into
the
network.
By
alternately
lowering
raising
temperature
hydrogel,
transition
from
sticky
nonsticky
state
was
achieved
environments,
wide
switching
range
between
high
low
adhesion,
fast
speed,
durable
efficiency.
Accurate
fine
control
dry
wet
strength
can
also
be
changing
hydrogel.
In
addition
performance,
surface
wettability,
mechanical
properties,
optical
transmission
adapt
programmed
switched
response
change.
exploiting
its
capacity,
demonstrated
as
gripper
for
controllable
capture
release
objects
underwater
environments.
This
study
opens
path
design
adhesives,
materials,
devices.
