ACS Sustainable Resource Management,
Год журнала:
2024,
Номер
unknown
Опубликована: Июль 7, 2024
Designing
bio-based
adhesives
with
multiple
crosslinking
networks
has
significant
implications
for
the
green
and
sustainable
development
of
forestry
industry.
A
sawdust
based
network
adhesive
system
was
constructed
by
a
small
molecule
covalent
bridge
hydrogen
bond
grafting
chain
thioctic
acid
(TA)
supramolecule
oxidized
(OS)
as
carrier
first
second
network,
which
realized
toughening
strengthening
sawdust/thioctic
(OSTA)
adhesive.
Furthermore,
wood
interface
regulated
3-glycidyl
ether
oxy
propyl
trimethoxysilane,
introduced
active
epoxy
groups
to
interface.
Then,
third
interfacial
reaction
carboxyl
group,
hydroxyl
amino
group
in
OSTA
system.
The
dry
bonding
strength
OSTA-modified
can
reach
2.09
MPa,
is
75.6%
50.4%
higher
than
that
OS
TA
adhesives,
respectively,
water
resistance
increased
from
0
MPa
1.25
1.71
MPa.
In
addition,
not
only
shows
adhesion
performance
but
also
manifests
excellently
on
various
surface
energy
substrates,
such
skin,
glass,
ceramics,
plants,
rubber,
stainless
steel,
etc.,
multi-functional
properties.
This
work
broadens
prospects
applications
scenarios.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 14, 2025
Due
to
the
finite
nature
of
fossil
resources
and
increasing
environmental
regulations
on
formaldehyde
emissions,
as
well
growing
public
health
concerns,
China's
wood
industry
is
in
urgent
need
developing
environmentally
friendly
adhesives
derived
from
renewable
natural
resources.
The
utilization
vegetable
protein
a
raw
material
for
shows
great
potential;
however,
its
limited
bond
strength
water
resistance
hinder
extensive
application
production
composites.
objective
this
investigation
was
enhance
adhesion
properties
peanut
protein-based
adhesive
through
incorporation
formaldehyde-free
urea-glyoxal
(UG)
resin
into
curing
system.
optimal
composition
ratio
systematically
investigated
achieve
highest
performance.
results
demonstrate
that
UG
undergoes
co-condensation
reaction
with
molecules,
resulting
formation
an
imine
bridge
during
hot
pressing
process.
solidified
forms
densely
packed
water-resistant
structure
both
covalent
noncovalent
interactions.
Among
them,
PP20-UG30-2.2
binder
exhibits
superior
bonding
performance,
respective
strengths
1.62
(dry
strength),
1.39
(cold
1.32
(hot
0.3
MPa
(boiling
strength).
This
not
only
surpasses
national
standard
requirements
(≥0.7
MPa)
but
also
outperforms
most
plant
adhesives.
In
general,
successful
combination
has
demonstrated
synergistic
effect,
surpassing
sum
their
individual
contributions.
advancement
significantly
propelled
progress
high-performance
based
proteins.
Polymer Composites,
Год журнала:
2024,
Номер
45(15), С. 13890 - 13900
Опубликована: Июнь 28, 2024
Abstract
Despite
the
continued
dominance
of
detrimental
formaldehyde‐based
binders
in
wood
reconstituted
products,
there
is
a
growing
push
to
develop
more
environmentally
friendly
alternatives.
Cellulose‐based
biomass
adhesives
have
been
extensively
researched
and
documented.
However,
their
industrial
application
limited
due
inadequate
water
resistance
suboptimal
coating
ability.
In
this
study,
cellulose‐derived
binder
with
hyperbranched
entangling
structure
was
synthesized
by
covalently
cross‐linking
branched
polyethylenimine
oxycellulose
through
Schiff
base
formation.
The
dry/wet
bonding
strength
prepared
plywood
2.07
1.52
MPa,
respectively,
exhibiting
remarkable
increase
breakthrough
compared
that
pure
oxidized
cellulose
binder.
This
can
be
attributed
formation
water‐resistant
tangle
network,
which
enhances
toughness
adhesive.
Notably,
adhesive
tends
agglomerate
on
surface,
whereas
modified
exhibits
uniform
study
further
demonstrates
reliable
potential
structures
based
reactions
development
biomass‐based
adhesives.
Highlights
A
high
cellulose‐based
prepared.
used
construct
cross‐linked
structures.
network
provides
excellent
resistance.
cured
has
strength.
Polymers,
Год журнала:
2024,
Номер
16(7), С. 1008 - 1008
Опубликована: Апрель 7, 2024
Natural
polymer-based
adhesive
hydrogels
have
garnered
significant
interest
for
their
outstanding
strength
and
versatile
applications,
in
addition
to
being
eco-friendly.
However,
the
capabilities
of
purely
natural
products
are
suboptimal,
which
hampers
practical
use.
To
address
this,
we
engineered
carboxymethyl
cellulose
(CMC)
surfaces
with
complementary
bases,
adenine
(A)
thymine
(T),
facilitate
self-assembly
(CMC-AT)
a
nanofiber
configuration.
Impressively,
shear
reached
up
6.49
MPa
mere
2%
concentration.
Building
upon
this
innovation,
conducted
comparative
analysis
adhesion
properties
between
CMC
CMC-AT
hydrogel
adhesives
when
applied
delignified
non-delignified
wood
chips.
We
examined
interplay
substrate,
as
well
role
mechanical
interlocking
overall
performance.
Our
findings
offer
fresh
perspective
on
development
new
biodegradable
polymer
adhesives.
