Traditional
petroleum-based
adhesives
have
decreased
in
popularity
as
a
result
of
their
elevated
cost
and
release
harmful
substances
into
the
environment.
Bio-based
lately
emerged
hot
research
subject.
Among
them,
protein-based
been
highly
regarded
due
to
excellent
adhesive
properties
low
prices.
Nevertheless,
protein
are
vulnerable
mould
deterioration,
which
is
one
drawbacks.
Chitosan
has
drawn
our
interest
being
second
most
prevalent
biopolymer
on
Earth,
having
multiple
functional
groups,
possessing
inherent
antimicrobial
properties.
We
produced
biomass
polyester
using
biomass-derived
materials
reacted
oxidised
polyester,
chitosan,
amino
trimethylene
phosphonic
acid
one-pot
method
create
versatile
with
boiling
water
resistance,
flame
retardancy,
mildew
resistance.
This
displayed
impressive
shear
strength
when
used
such
wood,
bamboo
glass
high
degree
crosslinking
via
ester,
carbon-nitrogen
double
bond,
well
amide
hydrogen
bonds.
In
particular,
wet
wood
reached
1.43
MPa
after
immersed
for
three
hours,
surpassing
Chinese
national
standard
plate
class
(≥0.7
MPa)
by
significant
margin.
Furthermore,
provided
retardant
attributes
expanding
possibilities
generating
multifunctional
bio-based
suitable
both
industrial
homes
usage.
Journal of Cleaner Production,
Год журнала:
2024,
Номер
467, С. 142914 - 142914
Опубликована: Июнь 14, 2024
This
study
investigates
a
novel
approach
by
utilizing
wood-derived
sugars
as
substrate
for
microbial
citric
acid
(CA)
production.
Additionally,
it
examines
the
environmental
implications
through
an
ex-ante
life
cycle
assessment
(LCA).
Various
strains
including
six
yeast
from
Yarrowia
genus,
three
filamentous
fungi
Aspergillus
and
eight
bacterial
were
evaluated
their
potential
in
CA
The
investigation
primarily
focused
on
optimizing
production
considering
various
factors
such
concentrations,
nitrogen
levels,
alcohols,
surfactants,
of
non-commercial
strains.
yielded
promising
results,
with
highest
yields
recorded
follows:
5.7
g/L
fermentation,
36.8
67.7
fermentation.
Furthermore,
applying
LCA,
assessed
impact
Results
indicated
significant
reduction
footprint
when
scaled
up,
emissions
decreasing
235
to
585.8
kgCO2eq/kg
at
laboratory
scale
4–6
larger
scale.
Journal of Agricultural and Food Chemistry,
Год журнала:
2024,
Номер
72(26), С. 14601 - 14609
Опубликована: Июнь 20, 2024
Although
γ-methacryloxypropyltrimethoxysilane
(MPS)
was
proved
to
be
an
effective
reagent
for
improving
the
dimensional
stability
of
wood,
a
bottleneck
in
ASE
value
(around
50%)
existed.
The
reason
that
MPS
with
low
polarity
opened
few
hydrogen
bonds
amorphous
region
cellulose,
while
these
could
reopened
by
water.
Therefore,
citric
acid
(CA)
is
chosen
cooperate
further
enhance
wood.
In
this
paper,
and
CA
were
used
modify
wood
individually
(MW
CW)
or
different
combinations,
is,
one-step
modification
(M/CW)
two-step
first
(M-CW)
(C-MW).
concentrations
optimized
at
5
wt%.
M/CW
only
25.74%
weight
percent
gain
(WPG)
6.43%,
which
0.6
times
MW
0.7
CW.
For
M-CW,
gradually
decreased
soaking
cycles,
from
65.64%
WPG
9.05%
51.20%.
C-MW
had
best
stability,
75.35%
11.50%.
it
during
cycle,
stabilized
62.20%
last.
SEM
EDS
images
showed
polymer
mainly
distributed
cell
walls
lumen
C-MW.
Thus,
enhanced
explained
opening
cellulose
first,
provided
more
binding
sites
MPS.
Wood Material Science and Engineering,
Год журнала:
2024,
Номер
unknown, С. 1 - 11
Опубликована: Окт. 15, 2024
This
paper
presents
a
new
two-step
approach
of
foaming
polypropylene
(PP)
containing
wood
fibers
(WF)
with
tri-sodium
citrate
dihydrate
as
the
low-temperature
chemical
blowing
agent
(CBA)
and
sucrose
high-temperature
CBA.
The
first
CBA
was
intentionally
selected
to
thermally
degrade
during
extrusion
(lower
temperature
range),
whereas
second
injection
molding
(higher
range).
CBAs
were
dissolved
in
water,
WF
soaked
these
solutions,
afterward
dried,
ground,
then
mixed
PP
extruded.
extruded
granules
molded
produce
dumbbell-shaped
samples.
porosity,
thermal
degradation,
crystallization,
mechanical
thermomechanical
properties
wood-polymer
composites
(WPCs),
well
their
susceptibility
acoustic
damping,
determined.
It
shown
that
can
be
an
effective
for
injection-molded
WPC
However,
effectiveness
this
additive
is
improved
by
addition
dihydrate,
which
decomposed
extrusion.
Materials,
Год журнала:
2024,
Номер
17(21), С. 5377 - 5377
Опубликована: Ноя. 4, 2024
Wood
modification
has
been
explored
in
various
ways
to
enhance
dimensional
stability
and
reduce
flammability,
with
a
focus
on
environmentally
friendly
treatments
meet
market
demands.
This
study
aimed
investigate
the
efficacy
of
new,
potential
fire-retardant
materials.
Specifically,
examined
combination
tripotassium
citrate
(TPC),
water-soluble
bio-based
fire
retardant,
sorbitol
citric
acid
(SorCA),
an
eco-friendly
thermosetting
resin
previously
studied.
While
TPC
is
known
control
combustion,
its
application
wood
not
thoroughly
researched.
To
assess
fixation
flammability
these
retardants,
tests
were
conducted
Scots
Pine
(Pinus
sylvestris
L.),
including
chemical
analysis,
stability,
mechanical
properties,
flame
retardancy,
leaching
tests.
The
SorCA
showed
high
weight
percent
gain
(WPG)
values;
however,
anti-swelling
efficiency
(ASE)
revealed
challenges
stability.
dynamic
properties
reduced,
whereas
static
strength
values
same
range
compared
untreated
wood.
exhibited
retardancy
prior
leaching,
diminished
post-leaching,
underscoring
need
for
improved
retention
strategies.
Bunsen
burner
leached
specimens
indicated
enhanced
performance
even
under
severe
conditions
as
per
EN
84:2020
procedure.
However,
cone
calorimetry
measurements
less
favorable
outcomes,
emphasizing
necessity
further
investigation
into
optimizing
enhancing
treatment
efficacy.
Research Square (Research Square),
Год журнала:
2023,
Номер
unknown
Опубликована: Сен. 13, 2023
Abstract
Fast-growingwood
is
particularly
favored
as
the
lightweight
material
and
has
potential
used
in
construction
furniture.
However,
dimensional
instability,
one
of
fast-growing
wood’s
inherent
weaknesses,
limits
its
utilization
solid
wood
products.
In
this
study,
Ailanthus
altissima
was
modified
with
1,3-dimethylol-4,5-dihydroxy
ethylene
urea
(DMDHEU)
after
ultrasound-assisted
pretreatment
to
improve
hygroscopic
stability.
Ultrasound
first
combination
DMDHEU
for
impregnation
modification.
The
weight
percentage
gain
(WPG),
absolute
dry
density,
tangential/radial
swelling
rates,
resin
distribution
functional
groups
chemical
components
were
investigated.
results
indicated
that
WPG
density
DMDHEU-ultrasonic
samples
increased
compared
DMDHEU-untreated
samples.
stability
improved
varying
degrees
particular,
rates
DMDHEU-ultrasonic-4%
NaOH
decreased
from
2.01%/1.22%
untreated
0.55%/0.38%.
On
hand,
affected
inside
vessel.
Raised-membranous
appeared
along
vessel
samples,
while
only
sporadic
deposition
observed
other
promoted
better
penetration
into
cell
wall,
hydroxyl
hydrophilic
part
converted
hydrophobic
ester
bonds
ether
bonds.
conclusion,
had
a
positive
effect
on
impregnation.
And
these
findings
shed
light
promising
methods
Traditional
petroleum-based
adhesives
have
decreased
in
popularity
as
a
result
of
their
elevated
cost
and
release
harmful
substances
into
the
environment.
Bio-based
lately
emerged
hot
research
subject.
Among
them,
protein-based
been
highly
regarded
due
to
excellent
adhesive
properties
low
prices.
Nevertheless,
protein
are
vulnerable
mould
deterioration,
which
is
one
drawbacks.
Chitosan
has
drawn
our
interest
being
second
most
prevalent
biopolymer
on
Earth,
having
multiple
functional
groups,
possessing
inherent
antimicrobial
properties.
We
produced
biomass
polyester
using
biomass-derived
materials
reacted
oxidised
polyester,
chitosan,
amino
trimethylene
phosphonic
acid
one-pot
method
create
versatile
with
boiling
water
resistance,
flame
retardancy,
mildew
resistance.
This
displayed
impressive
shear
strength
when
used
such
wood,
bamboo
glass
high
degree
crosslinking
via
ester,
carbon-nitrogen
double
bond,
well
amide
hydrogen
bonds.
In
particular,
wet
wood
reached
1.43
MPa
after
immersed
for
three
hours,
surpassing
Chinese
national
standard
plate
class
(≥0.7
MPa)
by
significant
margin.
Furthermore,
provided
retardant
attributes
expanding
possibilities
generating
multifunctional
bio-based
suitable
both
industrial
homes
usage.
