Dilute formic acid and alkaline oxidation relay treatment for the whole-fraction efficient gradient separation of space Arundo donax
Journal of Cleaner Production,
Год журнала:
2025,
Номер
unknown, С. 145244 - 145244
Опубликована: Март 1, 2025
Язык: Английский
Evaluation of Acidic Deep Eutectic Solvents Treatment on Enzymatic Hydrolysis Lignins: Structural Analysis and Antioxidant Activity
Polymers,
Год журнала:
2025,
Номер
17(8), С. 1006 - 1006
Опубликована: Апрель 8, 2025
The
high-value
utilization
of
enzymatic
hydrolysis
lignin
(EHL)
is
essential
for
promoting
the
development
biorefinery
industry.
This
study
investigated
enhancement
antioxidant
activity
and
ultraviolet
(UV)
absorption
capacity
EHL
through
treatment
with
choline
chloride
(ChCl)-based
acidic
deep
eutectic
solvents
(DESs).
yield,
chemical
structure,
UV
properties,
activity,
thermal
stability
degraded
regenerated
(DEHL)
were
analyzed.
results
indicated
that
DESs
effectively
preserved
aromatic
structure
EHL.
Compared
to
untreated
EHL,
DEHL
exhibited
an
increased
O/C
atomic
ratio,
a
decreased
transmittance,
significant
reduction
in
weight-average
molecular
weight
(Mw),
notable
increase
phenolic
hydroxyl
(ArOH)
content.
Notably,
treated
ChCl–p-toluenesulfonic
acid
had
lowest
Mw
(1586
g/mol)
highest
ArOH
Except
ChCl–malic
ChCl–acetic
systems,
all
other
five
DES
treatments
enhanced
varying
degrees.
Among
them,
IC50
DPPH
value
262.87
μg/mL.
Язык: Английский
Switchable Solvent for Separation and Extraction of Lignin from Lignocellulose Biomass: An Investigation of Chemical Structure and Molecular Weight
Polymers,
Год журнала:
2024,
Номер
16(24), С. 3560 - 3560
Опубликована: Дек. 20, 2024
Lignin,
the
most
abundant
natural
aromatic
polymer,
holds
considerable
promise
for
applications
in
various
industries.
The
primary
obstacle
to
valorization
of
lignin
into
useful
materials
is
its
low
molecular
weight
and
diminished
chemical
reactivity,
attributable
intricate
structure.
This
study
aimed
treat
lignocellulosic
biomass
using
a
switchable
solvent
(DBU–HexOH/H2O)
derived
from
non-nucleophilic
superbase
1,8-diazabicyclo
[5.4.0]undec-7-ene
(DBU),
which
efficiently
separates
extracts
poplar
wood.
Additionally,
it
sought
characterize
fundamental
properties
extracted
(SSL)
propose
mechanism
separation.
In
comparison
milled
wood
lignin,
SSL
exhibits
greater
weight,
superior
homogeneity,
enhanced
stability.
sample
was
analyzed
spectroscopies
including
infrared
spectroscopy,
nuclear
magnetic
resonance,
X-ray
photoelectron
spectroscopy.
findings
indicated
that
structure
preserved,
with
primarily
cleaving
C–C
α-O-4
bonds,
resulting
hydroxyl
content,
an
elevated
H/C
ratio,
reduced
O/C
ratio.
successfully
prepared
nanoparticles
(LNPs)
size
range
531–955
nm.
paper
presents
technique
processing
solvent,
highlighting
advancements
lignin’s
enhancing
use
sector.
Язык: Английский