ACS Sustainable Chemistry & Engineering,
Год журнала:
2019,
Номер
7(24), С. 19925 - 19934
Опубликована: Ноя. 13, 2019
The
production
of
lignin
nanoparticles
(LNPs)
has
opened
new
routes
to
the
utilization
in
advanced
applications.
existing
challenge,
however,
is
develop
a
method
that
can
easily
be
adapted
on
an
industrial
scale.
In
this
study,
we
demonstrated
green
and
rapid
preparing
LNPs
directly
from
sulfur-free
alkaline
pulping
liquor
by
combining
acid
precipitation
ultrasonication.
combined
produced
spherical
LNPs,
with
hierarchical
nanostructure
highly
negative
surface
charge,
within
only
5
min
sonication.
mild,
sonication
was
achieved
sonicating
without
prior
drying
acid-precipitated
dialyzed
lignin.
Optimization
revealed
potential
for
minimizing
consumption,
shortening
dialysis
time,
processing
as
much
20
wt
%
isolated
were
stable
during
storage
180
days,
at
pH
range
4–7,
dispersing
medium
below
0.1
M
NaCl.
also
displayed
excellent
emulsifying
properties,
stabilizing
oil-in-water
emulsions.
Thus,
simple
energy-efficient
opens
sustainable,
straightforward,
scalable
route
organic
solvent-free
high
interface
stabilizers
multiphase
systems
food
medical
industries.
ChemSusChem,
Год журнала:
2020,
Номер
13(17), С. 4420 - 4427
Опубликована: Янв. 17, 2020
Abstract
Lignin‐based
nanomaterials
fabricated
by
solution
self‐assembly
in
organic–aqueous
solvent
mixtures
are
among
the
most
attractive
biomass‐derived
products.
To
accurately
control
structure,
size,
and
properties
of
lignin‐based
nanomaterials,
it
is
important
to
achieve
fundamental
understanding
its
dissolution
aggregation
mechanisms.
In
this
work,
atomic
force
microscopy
(AFM)
molecular
dynamics
(MD)
simulations
employed
explore
behavior
enzymatic
hydrolysis
lignin
(EHL)
different
at
scale.
EHL
was
found
dissolve
well
appropriate
mixtures,
such
as
acetone–water
mixture
with
a
volume
ratio
7:3,
whereas
aggregated
pure
water,
ethanol,
acetone,
tetrahydrofuran.
The
interactions
between
EHL‐coated
AFM
probe
substrate
were
1.21±0.18
0.75±0.35
m
N
−1
water
respectively.
comparison,
interaction
decreased
0.15±0.08
(7:3
v
/
).
MD
further
indicate
that
hydrophobic
skeleton
hydrophilic
groups
could
be
solvated
acetone
molecules,
respectively,
which
significantly
promoted
dissolution.
Conversely,
only
or
organic
inducing
serious
lignin.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2019,
Номер
7(6), С. 6234 - 6242
Опубликована: Фев. 18, 2019
TiO2
is
widely
used
in
cosmetic
products
but
its
poor
dispersibility
and
photocatalytic
degradation
hazard
still
affect
performance.
In
this
work,
quaternized
alkali
lignin
(QAL)
applied
to
encapsulate
by
self-assembly
endows
with
excellent
sunscreen
performance
safety.
Results
show
that
the
nano
particles
were
well
trapped
colloidal
spheres
(LCS)
via
hydrogen
bonding.
The
LCS
encapsulated
(LCS@TiO2)
had
a
water
contact
angle
as
high
89°
comparison
only
22°
disk
control
sample.
Thus,
compatibility
hydrophobic
cream
was
improved.
activity
of
could
be
effectively
eliminated
after
modification.
dark
color
QAL
significantly
whitened
TiO2.
When
ratio
(w/w)
0.5,
LCS@TiO2
presented
best
synergistic
effect;
sun
protection
factor
(SPF)
value
containing
25
wt
%
reached
84.82.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2019,
Номер
7(24), С. 19925 - 19934
Опубликована: Ноя. 13, 2019
The
production
of
lignin
nanoparticles
(LNPs)
has
opened
new
routes
to
the
utilization
in
advanced
applications.
existing
challenge,
however,
is
develop
a
method
that
can
easily
be
adapted
on
an
industrial
scale.
In
this
study,
we
demonstrated
green
and
rapid
preparing
LNPs
directly
from
sulfur-free
alkaline
pulping
liquor
by
combining
acid
precipitation
ultrasonication.
combined
produced
spherical
LNPs,
with
hierarchical
nanostructure
highly
negative
surface
charge,
within
only
5
min
sonication.
mild,
sonication
was
achieved
sonicating
without
prior
drying
acid-precipitated
dialyzed
lignin.
Optimization
revealed
potential
for
minimizing
consumption,
shortening
dialysis
time,
processing
as
much
20
wt
%
isolated
were
stable
during
storage
180
days,
at
pH
range
4–7,
dispersing
medium
below
0.1
M
NaCl.
also
displayed
excellent
emulsifying
properties,
stabilizing
oil-in-water
emulsions.
Thus,
simple
energy-efficient
opens
sustainable,
straightforward,
scalable
route
organic
solvent-free
high
interface
stabilizers
multiphase
systems
food
medical
industries.
