Journal of Chemical Education,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 27, 2024
Chemistry
and
cultural
heritage
conservation
are
inextricably
linked.
Preserving
historical
artifacts
is
a
challenging
task
that
requires
an
understanding
of
chemistry.
Combining
the
with
chemical
experimental
teaching,
calcium
tannate
mineralized
hydrogel
(TA-Ca/Gel)
was
designed
to
be
applied
as
adhesive
restore
for
undergraduate
college
students.
Acrylic
acid
(AA),
acrylamide
(AM),
N,N′-methylenebis(acrylamide)
(MBAA)
were
used
construct
network
hydrogel,
while
tannic
(TA)
Ca(OH)2
served
mineralization
adhesion-enhancing
components.
Tetramethylenediamine
(TMEDA)
gel
accelerator.
The
structural
morphological
characterization
TA-Ca/Gel
performed
assistance
technicians
from
School
Analysis
Testing
Center.
Students
plotted
analyzed
data
using
Origin
software.
properties
measured
by
universal
tensile
tester.
Finally,
repair
broken
porcelain
pottery.
We
have
received
positive
feedback
students
through
this
comprehensive
experiment,
which
helped
obtain
better
how
synthesize
characterize
analyze
test
data,
present
drawing
This
also
introduced
them
study
basic
principles
artifact
protection
well
relationship
between
chemistry
conservation.
Inspired
topic
"Chemistry
conservation",
we
deepened
students'
application
cutting-edge
knowledge.
Abstract
As
skin
bioelectronics
advances,
hydrogel
wearable
devices
have
broadened
perspectives
in
environment
sensing
and
health
monitoring.
However,
their
application
is
severely
hampered
by
poor
mechanical
self‐healing
properties,
environmental
sensitivity,
limited
sensory
functions.
Herein,
inspired
the
hierarchical
structure
unique
cross‐linking
mechanism
of
hagfish
slime,
a
self‐powered
supramolecular
hereby
reported,
featuring
high
stretchability
(>2800%
strain),
ultrafast
autonomous
capabilities
(electrical
healing
time:
0.3
s),
self‐adhesiveness
(adhesion
strength:
6.92
kPa),
injectability,
ease
shaping,
antimicrobial
biocompatibility.
It
observed
that
embedding
with
highly
hygroscopic
salt
LiCl
hydrogel,
not
only
showed
excellent
electrical
conductivity
but
also
presented
favorable
anti‐freezing
water
retention
properties
extremely
cold
environments
natural
settings.
Given
these
attributes,
served
as
multifunctional
durable
device
sensitivity
(gauge
factor:
3.68),
fast
response
time
(160
ms),
low
detection
limit,
frequency
sensitivity.
Moreover,
applicability
this
further
demonstrated
long‐term
sensing,
remote
medical
communication,
underwater
communication.
Overall,
findings
pave
way
for
sustainable
development
hydrogel‐based
are
self‐powered,
durable,
offer
performance,
adaptability,
multi‐sensory
capabilities.
The
construction
of
high-strength
hydrogels
is
essential
for
engineering
applications
but
often
limited
by
poor
durability
under
stress.
Current
post-treatment
methods
are
inefficient
and
time
consuming.
Inspired
muscle
building,
we
propose
a
green,
efficient,
synergistic
enhancement
method.
dynamic
stretching
the
PVA
hydrogel
in
LS
solution
promotes
formation
an
ordered
polymer
network,
while
can
fix
structure.
After
500
cycles
(approximately
16.7
min),
tensile
strength,
toughness,
Young's
modulus
increase
76-fold,
117-fold,
304-fold,
respectively,
outperforming
single
treatments
such
as
soaking
or
training.
Multitechnique
analyses
reveal
that
nanoscale
crystalline
domains
microscale-ordered
polymers
drive
these
macroscopic
improvements.
Notably,
be
substituted
with
other
solvents
to
achieve
similar
effects,
demonstrating
excellent
adaptability,
scalability,
efficiency.
This
rapid
straightforward
technology
holds
great
promise
overcoming
challenges
constructing
applying
hydrogels.
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 17, 2025
Abstract
Muscles
are
highly
anisotropic,
force‐bearing
issues.
They
form
via
a
process
involving
nutrient
absorption
for
matrix
growth
and
mechanical
training
toughening,
in
which
cyclic
disassembly‐reconstruction
of
muscle
fibers
plays
critical
role
generating
strong
anisotropic
structures.
Inspired
by
this
process,
training‐associated
growing
strategy
is
developed
preparing
tough
hydrogels.
Using
hydrogels
made
from
polyvinyl
alcohol
(PVA)/tannic
acid
(TA)
as
an
example,
it
demonstrated
that
the
can
absorb
poly(ethylene
glycol)
diacrylate
(PEGDA)
disassembling
their
aligned
nanofibrillar
Incorporation
PEGDA
within
induces
PVA
to
crystal
domains
while
subsequent
restore
fibrillar
Such
combining
results
expansion
materials’
size
(≈2
times)
significant
enhancement
properties
(Young's
modulus:
2.4
2.85
MPa;
ultimate
tensile
strength:
8.2
14.1
toughness:
335
465
MJ
m
−3
).
With
high
energy
dissipation
efficiency
(≈0%),
potential
applications
these
adaptable
envisioned
impact‐protective
materials,
surgical
sutures,
etc.
