Journal of Applied Polymer Science,
Journal Year:
2024,
Volume and Issue:
141(22)
Published: March 21, 2024
Abstract
The
valorization
of
tannins
from
forest
by‐products
is
a
major
opportunity
for
the
sustainable
development
forestry
industry.
Herein
we
report
laccase‐mediated
polymerization
obtained
an
aqueous
pine
bark
extract.
reaction
was
conducted
under
oxygen
atmosphere
at
50°C
60
min
and
followed
by
UV–Vis,
fluorescence
intensity,
phenol
content,
viscosity
measurements.
An
insoluble
polymer
after
45
min,
which
attributed
to
coupling
reactions
triggered
phenoxyl
radicals
within
mixture.
showed
marked
increase
in
thermal
stability
compared
with
precursor
extract,
total
mass
loss
less
than
12%
temperatures
up
500°C,
suggesting
potential
practical
applications
flame
retardant
materials.
Additionally,
85%
DPPH
activity
60%
attenuation
singlet
release
upon
light
irradiation,
supports
antioxidant
photoprotective
properties
prepared
material.
To
best
our
knowledge,
this
first
describe
formation
direct
enzymatic
tannin
In
case,
soluble
are
sole
reactants
used
produce
promising
versatile
material
waste
valorization.
ChemSusChem,
Journal Year:
2021,
Volume and Issue:
14(21), P. 4615 - 4635
Published: Aug. 16, 2021
Abstract
Lignin
is
an
abundant
natural
feedstock
that
offers
great
potential
as
a
renewable
substitute
for
fossil‐based
resources.
Its
polyaromatic
structure
and
unique
properties
have
attracted
significant
research
efforts.
The
advantages
of
enzymatic
over
chemical
or
thermal
approach
to
construct
deconstruct
lignins
are
it
operates
in
mild
conditions,
requires
less
energy,
usually
uses
non‐toxic
chemicals.
Laccase
widely
investigated
oxidative
enzyme
can
catalyze
the
polymerization
depolymerization
lignin.
dual
nature
causes
challenge
controlling
overall
direction
lignin‐laccase
catalysis.
In
this
Review,
factors
affect
laccase‐catalyzed
lignin
were
summarized,
evaluated,
compared
identify
key
features
favor
polymerization.
addition,
critical
assessment
conditions
enable
production
novel
hybrids
via
grafting
was
presented.
To
assess
industrial
relevance
laccase‐assisted
valorization,
patented
applications
surveyed
challenges
opportunities
analyzed.
Finally,
our
perspective
realizing
full
laccase
building
lignin‐based
materials
advanced
deduced
from
analysis
limitations
governing
grafting.
Green Chemistry,
Journal Year:
2023,
Volume and Issue:
25(6), P. 2042 - 2086
Published: Jan. 1, 2023
This
review
aims
to
assess
the
sustainability
and
greenness
of
modification
processing
lignin
feedstock
using
an
adaptation
CHEM21
Metrics
Toolkit
includes
a
guide
for
green
solvents
designing
ionic
liquids.
Frontiers in Plant Science,
Journal Year:
2023,
Volume and Issue:
14
Published: March 1, 2023
Laccases
are
plant
enzymes
with
essential
functions
during
growth
and
development.
These
monophenoloxidases
involved
in
lignin
polymerization,
their
expression
respond
to
environmental
stress.
However,
studies
of
laccases
some
plants
fungi
have
highlighted
that
many
structural
functional
aspects
these
genes
still
unknown.
Here,
the
laccase
gene
family
Aeluropus
littoralis
(AlLAC)
is
described
based
on
sequence
structure
patterns
under
abiotic
stresses
ABA
treatment.
Fifteen
non-redundant
AlLACs
were
identified
from
A.
genome,
which
showed
differences
physicochemical
characteristics
structure.
Based
phylogenetic
analysis,
orthologues
classified
into
five
groups.
A
close
evolutionary
relationship
was
observed
between
LAC
members
rice
.
According
interaction
network,
interact
more
proteins
biological
processes
such
as
iron
incorporation
metallo-sulfur
cluster,
catabolism,
regulation
symbiotic
process
plant-type
primary
cell
wall
biogenesis.
Gene
analysis
selected
AlLAC
s
using
real-time
RT
(reverse
transcription)-PCR
revealed
induced
response
cold,
salt,
osmotic
stress,
well
Moreover,
differential
shoot
root
tissues.
Our
findings
indicate
preferentially
late
Polymers,
Journal Year:
2023,
Volume and Issue:
15(7), P. 1694 - 1694
Published: March 29, 2023
A
reliance
on
fossil
fuel
has
led
to
the
increased
emission
of
greenhouse
gases
(GHGs).
The
excessive
consumption
raw
materials
today
makes
search
for
sustainable
resources
more
pressing
than
ever.
Technical
lignins
are
mainly
used
in
low-value
applications
such
as
heat
and
electricity
generation.
Green
enzyme-based
modifications
technical
lignin
have
generated
a
number
functional
lignin-based
polymers,
fillers,
coatings,
many
other
materials.
These
bio-modified
often
display
similar
properties
terms
their
durability
elasticity
fossil-based
while
also
being
biodegradable.
Therefore,
it
is
possible
replace
wide
range
environmentally
damaging
with
ones.
By
researching
publications
from
last
20
years
focusing
latest
findings
utilizing
databases,
comprehensive
collection
this
topic
was
crafted.
This
review
summarizes
recent
progress
made
enzymatically
modifying
laccases,
peroxidases,
lipases.
underlying
enzymatic
reaction
mechanisms
processes
elucidated
application
possibilities
discussed.
In
addition,
environmental
assessment
novel
products
well
developments,
opportunities,
challenges
highlighted.
