Water-Intercalated and Humidity-Responsive Lamellar Materials by Self-Assembly of Sodium Acrylate Random Copolymers
Y. Horiike,
No information about this author
Hiroyuki Aoki,
No information about this author
Makoto Ouchi
No information about this author
et al.
Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 14, 2025
Herein,
we
report
water-intercalated
and
humidity-responsive
lamellar
materials
obtained
from
the
self-assembly
of
sodium
acrylate
(ANa)/alkyl
or
oleyl
(RA)
random
copolymers.
The
copolymers
efficiently
absorbed
water
into
hydrophilic
ANa/main
chain
phase
outer
environment
to
form
structures
consisting
segments
hydrophobic
side
chains.
formation
involves
controlling
weight
fraction
containing
40–70
wt
%
by
RA
content,
chains,
amount
water.
domain
spacing
can
be
controlled
in
range
2–6
nm.
More
interestingly,
reversibly
afford
expansion
contraction
sub-1
nm
level
via
absorption
release
water,
response
relative
humidity.
multilayered
process
intercalation
was
analyzed
situ
neutron
reflectometry
atomic
force
microscopy
measurements
under
humid
conditions.
polymer
film
further
served
as
a
moisture-sensitive
actuator
that
macroscopically
induces
deformation
responsive
Language: Английский
Reversible photoswitching of proton conduction in hetero‐smectic lamellar structures formed by side‐chain liquid crystalline copolymer thin films
Yuya Ishizaki,
No information about this author
Kota Suetsugu,
No information about this author
Mitsuo Hara
No information about this author
et al.
Polymer International,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 31, 2024
Abstract
Spatiotemporal
control
of
ion
conductivity
is
a
key
issue
for
creating
emerging
fields
functional
ion‐conducting
nanomaterials.
In
the
present
paper,
we
demonstrate
formation
hetero‐smectic
lamellar
structures,
which
are
formed
by
nanosegregation
hydrophobic
liquid
crystalline
(LC)
azobenzene
side
chains
and
hydrophilic
acrylic
acid
via
polymer
main
in
side‐chain
LC
(SCLC)
copolymers,
reversible
photoswitching
proton
conductivity.
Proton‐conducting
SCLC
copolymers
with
different
contents
synthesized
free‐radical
copolymerization.
The
nature
polymers
investigated
polarized
optical
microscope
observation,
differential
scanning
calorimetry
X‐ray
scattering
measurements.
Ultraviolet
(UV)–visible
absorption
spectroscopy
grazing
incidence
measurements
reveal
copolymer
thin
films.
Proton
films
evaluated
impedance
under
temperatures
relative
humidity
conditions
sequential
UV
light
irradiation.
These
results
indicate
that
stable
around
one
order
magnitude
attributed
to
trans
–
cis
photoisomerization
offer
opportunity
applications
photo‐functional
nanomaterials
including
biomimetic
ionic
signal
transduction
devices
neuromorphic
devices.
©
2024
Society
Chemical
Industry.
Language: Английский