Personal
health
management
drives
the
development
of
intelligent
hydrogel
dressings,
which
pursue
optical
transparency,
stretchability,
and
conductivity
are
required
to
perceive
specific
environmental
stimuli
by
dynamic
structure,
shape,
or
color
memory.
However,
incorporation
weak
perceptive
elements
black
conductive
polymers
limits
fabrication
these
hydrogels.
Herein,
we
propose
smart
hydrogels
with
inscribable
memorizing-forgetting
transparency
behavior
in
situ
degrading
immobilizing
polydopamine-doped
polypyrrole
(PDA-PPy)
nanodots
into
an
interpenetrating
poly(NIPAm-co-acrylic
acid)
copolymer/polyacrylamide
(PNAc/PAM)
network.
These
not
only
optically
transparent
(∼64.99%),
stretchable
(∼1052%),
self-adhesive
(21-105
kPa),
highly
(∼0.8
S/m),
but
also
can
temperature
changes
via
structure
shifts,
enables
temperature-induced
reversible
control.
Especially,
temperature-dependent
transparent-opaque
transition
kinetics
tuned
protonation
-COOH
groups
at
pH
<
pKa,
utilizing
achieve
inscribed
programmed
memory
for
information
memorizing-forgetting-recalling
based
on
a
pH-engraved
evolution
response
changes.
be
used
as
efficient
near-infrared
(NIR)
light-controlled
drug
release
carriers
realize
on-demand
release,
serve
soft
sensor
recognize
different
body
postures
movement
behaviors
high
strain
sensitivity
(gauge
factor,
GF
=
5.98),
broad
working
(5-500%),
rapid
(139
ms),
excellent
sensing
reliability
(≈1000
cycles
50%
strain).
