ACS Sustainable Chemistry & Engineering,
Journal Year:
2024,
Volume and Issue:
12(20), P. 7903 - 7912
Published: May 6, 2024
Recently,
formaldehyde-free
environment-friendly
bio-based
wood
adhesives
have
been
a
hot
research
topic
in
the
industry.
Glucose
is
widely
sourced
biomass
material,
presenting
also
good
reactivity,
which
has
made
it
focus
of
cutting-edge
research.
In
work
presented
here,
new
formulation
was
developed
for
preparing
glucose-based
adhesive
with
excellent
bonding
strength
and
water
resistance.
oxidized
by
sodium
periodate
at
room
temperature
to
generate
bioaldehydes
(OG),
were
then
reacted
polyurea
(HU)
synthesized
reaction
hexamethylene
diamine
(HMD)
urea
(U)
via
deamination.
This
resulted
an
environmentally
friendly
green
(OGHU
resin)
containing
neither
formaldehyde
nor
other
toxic
volatile
aldehydes.
The
effect
mass
ratio
HU/OG
on
resin
properties
investigated.
results
showed
that
OGHU
imparted
plywood
bonded
dry
shear
strength,
24
h
cold
soaking
wet
3
(63
°C)
boiling
as
high
1.48
1.16,
1.26,
1.12
MPa,
respectively.
Its
superior
performance
exceeded
expectations
GB/T
9846–2015
standard
(≥0.7
MPa)
sufficiently
be
considered
substitute
currently
used
urea-formaldehyde
panel
adhesives.
ACS Sustainable Chemistry & Engineering,
Journal Year:
2024,
Volume and Issue:
12(10), P. 3966 - 3976
Published: Feb. 28, 2024
From
an
environmentally
sustainable
perspective,
soybean
meal
(SM)
adhesive
presents
ideal
alternative
to
petrochemical-based
adhesives.
Generally,
strength
and
toughness
are
mutually
exclusive
for
adhesive.
Hence,
the
creation
of
protein-based
adhesives
with
high
water-resistant
bonding,
remarkable
toughness,
multifunctionality
remains
a
notable
challenge.
This
study
reports
dual
hyperbranched
siloxane
nanocluster
cross-linking
strategy
creating
SM-based
superior
performance.
In
detail,
synthesized
epoxy
(ESN)
phenylboronic
acid
(BPA@SN)
were
introduced
into
SM
matrix
establish
targeted
network
between
groups
protein
chains
as
well
polysaccharides.
Meanwhile,
flexible
Si–O
segments
within
facilitated
energy
dissipation,
significantly
boosting
toughness.
After
modification,
SM/ESN/BPA@SN-1
demonstrated
outstanding
dry
bonding
(2.04
±
0.18
MPa),
(1.12
0.06
(18.5
4.02
kJ/m3).
Moreover,
exhibited
distinctly
improved
resistance
mold,
thermal
stability,
flame
retardancy.
Therefore,
this
new
using
functional
nanoclusters
design
strong,
tough,
multifunctional
green
wood-based
biomass
provides
ideas
achieving
development.
