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.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2024,
Номер
12(33), С. 12341 - 12353
Опубликована: Авг. 8, 2024
Recently,
the
investigation
into
sustainable
adhesives
for
wood
composites
has
garnered
significant
attention.
However,
a
notable
limitation
of
biobased
lies
in
their
susceptibility
to
mildew
growth
and
degradation.
Chitosan,
being
second
most
abundant
biopolymer
on
Earth,
featuring
multitude
functional
groups
inherently
possessing
antimicrobial
properties,
emerged
as
compelling
candidate
address
this
challenge.
In
study,
we
devised
novel
biomass-derived
polyester,
which
was
subsequently
cross-linked
with
chitosan
amino
trimethylene
phosphonic
acid
streamlined
one-pot
process.
This
innovative
approach
yielded
versatile
adhesive
that
exhibits
resistance
boiling
water,
flame
retardancy,
inhibition.
The
adhesive's
exceptional
shear
strength,
when
applied
materials
such
wood,
bamboo,
glass,
stems
from
its
robust
cross-linking
network
comprising
ester,
carbon–nitrogen
double
bonds,
amides,
hydrogen
bonds.
Notably,
subjected
3
h
immersion
demonstrated
remarkable
wet
strength
1.43
MPa
vastly
exceeding
minimum
threshold
0.7
specified
by
Chinese
national
standard
(GB/T
9846-2015)
plywood.
Additionally,
imparted
flame-retardant
properties
composites,
thereby
broadening
scope
multifunctional
applicable
across
industries
encompassing
manufacturing,
construction,
furniture
sectors.
Recently,
wood
modification
with
environmentally
friendly
agents
has
received
special
attention.
To
this
end,
study
was
conducted
to
use
humin
fractions,
in
combination
citric
acid
(CA)
and
succinic
(SA),
as
reaction
catalysts
for
the
of
Scots
pine
(Pinus
sylvestris
L.)
sapwood.
The
effects
humination
were
evaluated
by
means
dimensional
stability,
static
dynamic
mechanical
properties,
thermal
crystalline
structure,
biological
durability
tests
on
modified
samples
compared
unmodified
reference
ones.
According
results,
stability
huminated
significantly
increased,
increase
presence
higher
than
sole
humin-modified
samples.
properties
considerably
improved
17–24%
modulus
rupture
(MOR)
11–12%
elasticity
(MOE).
An
apparent
storage
also
determined
analysis
(DMA).
Although
degradation
slightly
shifted
lower
temperatures
after
humination,
effect
more
pronounced
residual
mass
retention
against
white
brown
rot
fungi
modification.
Overall,
showed
huge
potential
a
green
approach
enhance
outdoor
applications.
Wood Material Science and Engineering,
Год журнала:
2024,
Номер
19(6), С. 1244 - 1250
Опубликована: Фев. 11, 2024
Unilaterally
surface-densified
wood
(USD),
suitable
for
applications
in
solid
flooring
and
furniture,
can
significantly
increase
value
when
coated
with
paint.
We
prepared
USD
by
compacting
the
individual
surface
of
under
different
preheating
compression
times,
subsequently
applied
waterborne
acrylic
paint
on
its
to
investigate
impact
various
unilateral
densification
processes
coating
properties.
Results
demonstrated
that
unpreheated
exhibited
superior
film
adhesion,
hardness,
resistance.
The
interfacial
bonding
strength
decreased
increased
time
not
preheated.
A
comprehensive
analysis
revealed
unilaterally
without
60
s
optimal
properties,
tight
bonding,
minimal
weight
loss
(0.1387
g),
adhesion
hardness
grades
0
5H,
2.26
MPa,
an
indentation
diameter
only
8.3
mm.
This
study
offers
valuable
insights
into
properties
wood.
