Polymers,
Год журнала:
2023,
Номер
16(1), С. 49 - 49
Опубликована: Дек. 22, 2023
The
valorization
of
the
black
liquor
produced
during
chemical
pulping
wheat
straw
is
key
to
sustainable
use
this
abundant
agricultural
waste.
However,
silica
problem
has
hampered
recovery
process.
Herein,
nanoprecipitation
technology
was
used
produce
lignin
nanoparticles
(LNPs)
from
using
γ-valerolactone
(GVL)
as
a
solvent
and
water
an
anti-solvent.
results
showed
that
uniform,
well-dispersed,
stable
LNP
produced.
particle
size
Zeta
potential
161
nm
−24
mV
suspension
were
obtained
at
GVL
concentration
87%.
structure
bonding
adequately
preserved
after
based
on
two-dimensional
heteronuclear
single
quantum
coherence
nuclear
magnetic
resonance
(2D-HSQC
NMR)
spectroscopy,
Fourier
transform
infrared
(FTIR)
analysis,
thermal
stability
improved
thermogravimetric
analysis.
In
addition,
phenolic
hydroxyl
groups
quantified
by
31P-NMR
analysis
are
beneficial
for
cross-linking
modification.
This
work
not
only
achieved
but
also
opened
up
new
avenue
advanced
nanomaterials.
ACS Applied Nano Materials,
Год журнала:
2024,
Номер
7(5), С. 5272 - 5286
Опубликована: Фев. 21, 2024
Superparamagnetic
nanoparticle-arrested
hydrogel
matrices
have
immense
significance
in
smart
soft
biomaterials.
Herein,
we
report
the
synthesis
of
superparamagnetic
nanoparticle-loaded
magneto-responsive
tough
elastomeric
hydrogels
for
dual-responsive
drug
delivery.
In
first
phase
work,
carried
out
room-temperature
amine-functionalized
iron
oxide
nanoparticles
(IONPs),
and
second
demonstrated
that
IONPs
could
act
as
a
toughening
agent
well
viscosity
modifier
poly(acrylic
acid-co-hydroxyethyl
methacrylate)
copolymer
hydrogels.
The
was
tested
by
Fourier
transformed
infrared
(FTIR)
spectroscopy,
X-ray
photoelectron
spectroscopy
(XPS),
continuous-wave-electron
paramagnetic
resonance
(CW-EPR).
Moreover,
affect
its
gelation
time
elasticity
significantly,
which
also
evaluated
from
rheological
behavior.
compressive
mechanical
strength
(∼120
kPa),
elasticity,
recovery
to
original
shape
(zero
permanent
set),
water
uptake,
thixotropic
behavior
under
dynamic
stress
hybrid
supported
robustness
swelled
state.
release
showed
dual
parameter
dependency
(IONPs
cross-linker)
responsiveness
against
both
pH
static
magnetic
field.
delayed
network
rupturing,
delivery
nature,
noncytotoxic
human
live
cells
promote
this
an
ideal
alternative
remotely
controlled
vehicle.
Advanced Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Июль 10, 2024
Abstract
Supramolecular
hydrogels
are
typically
assembled
through
weak
non‐covalent
interactions,
posing
a
significant
challenge
in
achieving
ultra
strength.
Developing
higher
strength
based
on
molecular/nanoscale
engineering
concepts
is
potential
improvement
strategy.
Herein,
super‐tough
supramolecular
hydrogel
by
gradually
diffusing
lignosulfonate
sodium
(LS)
into
polyvinyl
alcohol
(PVA)
solution.
Both
simulations
and
analytical
results
indicate
that
the
assembly
subsequent
enhancement
of
crosslinked
network
primarily
attributed
to
LS‐induced
formation
gradual
densification
strong
crystalline
domains
within
hydrogel.
The
optimized
exhibits
impressive
mechanical
properties
with
tensile
≈20
MPa,
Young's
modulus
≈14
toughness
≈50
MJ
m⁻
3
,
making
it
strongest
lignin‐PVA/polymer
known
so
far.
Moreover,
LS
provides
excellent
low‐temperature
stability
(<‐60
°C),
antibacterial,
UV‐blocking
capability
(≈100%).
Interestingly,
diffusion
ability
demonstrated
for
self‐restructuring
damaged
hydrogel,
3D
patterning
surfaces,
enhancing
local
freeze‐thaw
PVA
goal
foster
versatile
platform
combining
eco‐friendly
biocompatible
PVA,
paving
way
innovation
interdisciplinarity
biomedicine,
materials,
forestry
science.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2024,
Номер
12(18), С. 7105 - 7114
Опубликована: Апрель 19, 2024
Conductive
hydrogel
is
a
promising
material
for
flexible
sensors
due
to
its
good
electrical
conductivity,
adhesion,
and
high
sensitivity.
However,
the
challenge
of
integrating
conductive
fillers
like
liquid
metals
lies
in
their
poor
interface
compatibility,
which
adversely
affects
mechanical
strength
lifespan.
Addressing
achieving
both
this
study
harnessed
2,2,6,6-tetramethylpiperidin-1-oxyl
(TEMPO)-oxidized
lignin
form
stable
between
metal
(LM)
system.
Furthermore,
innovation
(lignin-LM)
facilitates
free
radical
polymerization
acrylic
acid
(PAA)
at
room
temperature,
resulting
hydrogels.
These
hydrogels
demonstrated
excellent
self-healing,
adhesive,
tensile,
antibacterial
properties,
alongside
strain
sensing
accuracy
output
sensor
applications.
In
conclusion,
PAA-Lignin-LM
holds
promise
wearable,
electronic
products,
introducing
novel
approach
high-value
utilization
lignin.
ACS Nano,
Год журнала:
2024,
Номер
18(35), С. 24095 - 24104
Опубликована: Авг. 16, 2024
Recently,
certain
challenges
and
accompanying
drawbacks
have
emerged
in
the
preparation
of
high-strength
tough
polymer
hydrogels.
Insights
from
wood
science
highlight
role
intertwined
molecular
structure
lignin
crystalline
cellulose
contributing
to
wood's
strength.
Herein,
we
immersed
prestretched
poly(vinyl
alcohol)
(PVA)
hydrogels
into
a
solution
nanosized
lignosulfonate
sodium
(LS),
water-soluble
anionic
polyelectrolyte,
creatively
reconstruct
this
similar
at
scale
The
LS
effectively
fixed
bundled
PVA
polymers
while
inducing
formation
dense
domains
within
matrix.
Consequently,
interwoven
conferred
good
strength
composite
hydrogels,
exhibiting
tensile
up
∼23
MPa,
fracture
strain
∼350%,
Young's
modulus
∼17
toughness
∼47
MJ/m
