Industrial & Engineering Chemistry Research,
Год журнала:
2024,
Номер
63(43), С. 18289 - 18297
Опубликована: Окт. 15, 2024
Industrial
development
has
led
to
contamination
of
the
environment
with
heavy
metal
ions,
which
accumulate
in
soil
or
water
and
pose
a
serious
threat
human
health.
Simple
rapid
detection
methods
are
effective
controlling
preventing
further
increase
pollution.
However,
existing
relatively
complex
require
expensive
instruments
special
sample
handling,
often
resulting
secondary
contamination.
Therefore,
there
is
real
need
for
simple
economical
on-site
method.
Herein,
we
describe
new
method
Fe3+
ions
industrial
wastewater
using
shape
change
hydrogel.
Metal
coordinate
carboxyl
groups
polyacrylic
acid/poly(vinyl
alcohol)
memory
hydrogel,
this
fixes
temporary
shapes
that
depend
on
their
concentrations.
This
reversible
by
dissociation
ethylenediaminetetraacetic
acid.
In
particular,
can
be
well
reproduced
observed
naked
eyes.
The
performance
experiments
density
functional
theory
(DFT)
simulation
calculations
showed
coordinated
most
strongly
hydrogel
under
experimental
conditions.
A
quantitative
relationship
between
fixation
ratio
ion
concentrations
was
established.
According
this,
an
economic
testing
device
designed
achieve
analogue
effluent
detection.
potential
applications
concentration
highly
acidic
wastewater,
offers
possibility
practical
application
hydrogels
environmental
management.
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
146(26), С. 17539 - 17558
Опубликована: Июнь 18, 2024
Hydrogels
have
emerged
as
a
promising
class
of
extracellular
matrix
(ECM)-mimicking
materials
in
regenerative
medicine.
Here,
we
briefly
describe
current
state-of-the-art
ECM-mimicking
hydrogels,
ranging
from
natural
to
hybrid
completely
synthetic
versions,
giving
the
prelude
importance
supramolecular
interactions
make
true
ECM
mimics.
The
potential
create
mimics
for
cell
culture
is
illustrated
through
focus
on
two
different
hydrogel
systems,
both
developed
our
laboratories.
We
use
some
recent,
significant
findings
present
important
design
principles
underlying
cell–material
interaction.
To
achieve
spreading,
propose
that
slow
molecular
dynamics
(monomer
exchange
within
fibers)
crucial
ensure
robust
incorporation
adhesion
ligands
fibers.
Slow
bulk
(stress–relaxation─fiber
rearrangements,
τ1/2
≈
1000
s)
required
spreading
soft
gels
(<1
kPa),
while
gel
stiffness
overrules
stiffer
gels.
Importantly,
this
resonates
with
others
which
specialize
material
types:
impaired
case
substrate
relaxation
occurs
faster
than
clutch
binding
and
focal
lifetime.
conclude
discussing
considerations
limitations
approach
well
provide
forward
thinking
perspective
further
understand
hydrogel–cell
interactions.
Future
work
may
utilize
presented
guidelines
not
only
arrive
at
next
generation
hydrogels
but
also
advance
other
fields,
such
bioelectronics,
opening
up
new
opportunities
innovative
applications.
Chemical Science,
Год журнала:
2023,
Номер
14(44), С. 12653 - 12660
Опубликована: Янв. 1, 2023
In
biology,
cells
regulate
the
function
of
molecules
using
catalytic
reaction
cycles
that
convert
reagents
with
high
chemical
potential
(fuel)
to
waste
molecules.
Inspired
by
synthetic
analogs
such
have
been
devised,
and
a
widely
used
cycle
uses
carboxylates
as
catalysts
accelerate
hydration
carbodiimides.
The
is
versatile
easy
use,
so
it
applied
motors,
pumps,
self-assembly,
phase
separation.
However,
suffers
from
side
reactions,
especially
formation
N-acylurea.
cycles,
reactions
are
disastrous
they
decrease
fuel's
efficiency
and,
more
importantly,
destroy
molecular
machinery
or
assembling
Therefore,
this
work
tested
how
suppress
N-acylurea
screening
precursor
concentration,
its
structure,
carbodiimide
additives,
temperature,
pH.
It
turned
out
combination
low
pH,
10%
pyridine
fraction
fuel
could
significantly
product
keep
highly
effective
successful
assembly.
We
anticipate
our
will
provide
guidelines
for
carbodiimide-fueled
choose
optimal
conditions.
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
146(28), С. 18781 - 18796
Опубликована: Июль 5, 2024
Covalent
polymers
are
versatile
macromolecules
that
have
found
widespread
use
in
society.
Contemporary
methods
of
polymerization
made
it
possible
to
construct
sequence
polymers,
including
block
copolymers,
with
high
precision.
Such
copolymers
assemble
solution
when
the
blocks
differing
solubilities.
This
produces
nano-
and
microparticles
various
shapes
sizes.
While
is
straightforward
draw
an
analogy
between
such
amphiphilic
phospholipids,
these
two
classes
molecules
show
quite
different
assembly
characteristics.
In
particular,
often
under
kinetic
control,
thus
producing
nonequilibrium
structures.
leads
a
rich
variety
behaviors
being
observed
copolymer
assembly,
as
pathway
dependence
(e.g.,
thermal
history),
nonergodicity
responsiveness.
The
dynamics
polymer
assemblies
can
be
readily
controlled
using
changes
environmental
conditions
and/or
integrating
functional
groups
situated
on
external
chemical
reactions.
perspective
highlights
control
both
pervasive
useful
attribute
mechanics
assembly.
Recent
examples
highlighted
order
toggling
static
dynamic
behavior
used
generate,
manipulate
dismantle
states.
New
kinetics
will
provide
endless
unanticipated
applications
materials
science,
biomimicry
medicine.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(20)
Опубликована: Март 22, 2024
Abstract
Recent
work
has
demonstrated
that
temporary
crosslinks
in
polymer
networks
generated
by
chemical
“fuels”
afford
materials
with
large,
transient
changes
their
mechanical
properties.
This
can
be
accomplished
carboxylic‐acid‐functionalized
hydrogels
using
carbodiimides,
which
generate
anhydride
lifetimes
on
the
order
of
minutes
to
hours.
Here,
impact
network
architecture
properties
transiently
crosslinked
was
explored.
Single
(SNs)
were
compared
interpenetrated
(IPNs).
Notably,
semi‐IPN
precursors
give
IPNs
treatment
carbodiimide
much
higher
fracture
energies
(i.e.,
resistance
fracture)
and
superior
compressive
strain
other
architectures.
A
precursor
material
featuring
acrylic
acid
only
free
chains
yields,
carbodiimide,
an
IPN
a
energy
2400
J/m
2
,
fourfold
increase
analogous
yields
SN.
enables
formation
macroscopic
complex
cut
patterns,
even
at
high
strain,
underscoring
pivotal
role
performance.
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
146(14), С. 9957 - 9966
Опубликована: Март 28, 2024
A
Fe3+-ion
cross-linked
carboxymethyl
cellulose,
Fe3+-CMC,
redox-active
gel
exhibiting
dissipative,
transient
stiffness
properties
is
introduced.
Chemical
or
photosensitized
reduction
of
the
higher-stiffness
Fe3+-CMC
to
lower-stiffness
Fe2+-CMC
gel,
accompanied
by
aerobic
reoxidation
matrix,
leads
stiffness,
functional
matrix.
The
light-induced,
temporal,
release
a
load
(Texas
red
dextran)
and
light-triggered,
mechanical
bending
poly-N-isopropylacrylamide
(p-NIPAM)/Fe3+-CMC
bilayer
construct
are
introduced,
thus
demonstrating
potential
use
dissipative
for
controlled
drug
soft
robotic
applications.
Chemical Science,
Год журнала:
2023,
Номер
14(45), С. 12815 - 12849
Опубликована: Янв. 1, 2023
We
discuss
the
current
state-of-the-art
in
exploiting
fluorescence-based
techniques
for
analysing
polymer
systems
and
soft
matter
materials,
as
well
provide
an
outlook
on
future
opportunities
challenges.
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
146(5), С. 3323 - 3330
Опубликована: Янв. 26, 2024
In
living
organisms,
precise
control
over
the
spatial
and
temporal
distribution
of
molecules,
including
pheromones,
is
crucial.
This
level
equally
important
for
development
artificial
active
materials.
this
study,
we
successfully
controlled
small
molecules
in
system
at
nonequilibrium
states
by
actively
transporting
them,
even
against
apparent
concentration
gradient,
with
high
selectivity.
As
a
demonstration,
aqueous
solution
acid
orange
(AO7)
TMC
