Advanced Sustainable Systems,
Год журнала:
2024,
Номер
8(11)
Опубликована: Июнь 28, 2024
Abstract
In
order
to
valorize
the
enzymatic
hydrolysis
residues
(EHR)
from
bioethanol
industry,
this
work
studies
effects
on
structure,
properties
as
well
shear
resistance
of
EHR‐based
phenol
formaldehyde
(EPF)
adhesives
prepared
EHR
instead
commercial
phenol.
2D
heteronuclear
signal
quantum
coherence
NMR
(2D
HSQC
NMR)
and
31
P
analysis
reveal
that
lignin
in
(EHL)
possesses
a
high
amount
G
H
units
which
contain
1.9
mmol
g
−1
active
sites
(reaction
site
with
formaldehyde).
Fourier‐transform
infrared
(FT‐IR)
characterization
shows
proportions
5–30%
EPF
do
not
show
great
influence
chemical
structure
type
main
functional
groups
adhesives.
The
strength
measurement
results
10%‐EPF
adhesive
is
significantly
improved
by
29%
compared
phenol‐formaldehyde
(PF)
adhesive,
due
EHL
enhanced
cross‐linking
polymer
chains.
This
emphasizes
potential
benefits
using
industrial
develop
cost‐effective
preparation
schemes,
therefore
giving
an
additional
value
waste
biorefineries.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Май 2, 2024
Abstract
The
development
of
multifunctional
bio‐adhesive
plays
a
critical
role
in
achieving
sustainable
society,
where
the
intrinsic
sensitivity
to
water
and
poor
dynamics
severely
bottlenecks
its
scale‐up
application.
Inspired
by
microstructure
dragonfly
wings,
strong
tough
adhesive
with
excellent
reprocessability
is
designed
developed
creating
dynamic
network
consisting
lignin
polyurea
(LPU)
framework
soybean
protein
(SP).
LPU
act
as
rigid
nervures
slow
crack
propagation
transfer
stress,
while
SP
dissipate
strain
energy
through
interplay
from
graded
hydrogen
imine
bonds
generated
between
SP.
achieves
significant
enhancements
fracture
toughness
resistance
≈7
23
folds,
respectively,
compared
Furthermore,
capacity
for
diffusion
restoration
endows
superior
reprocessability,
enabling
recycled
particleboard
achieve
high
retention
modules
(over
80%).
This
approach
offers
promising
eco‐friendly
alternative
conventional
petrochemical
adhesive.
Forests,
Год журнала:
2023,
Номер
14(1), С. 84 - 84
Опубликована: Янв. 2, 2023
The
high
demand
for
wood-based
composites
generates
a
greater
use
of
wood
adhesives.
current
industrial
challenge
is
to
develop
modified
synthetic
adhesives
remove
harmful
formaldehyde,
and
test
natural
scope
the
research
included
manufacturing
high-density
fiberboards
(HDF)
using
binders
such
as
polylactic
acid
(PLA),
polycaprolactone
(PCL),
thermoplastic
starch
(TPS)
with
different
resination
(12%,
15%,
20%).
HDF
biopolymers
was
compared
reference
HDF,
manufactured
following
example
technology,
commonly
used
urea-formaldehyde
(UF)
resin.
Different
mechanical
physical
properties
were
determined,
namely
modulus
rupture
(MOR),
elasticity
(MOE),
internal
bonding
strength
(IB),
thickness
swelling
(TS),
water
absorption
(WA),
surface
(SWA),
contact
angle,
well
density
profile;
scanning
electron
microscope
(SEM)
analysis
also
performed.
results
showed
that
increasing
binder
content
significantly
improved
panels
in
case
(MOR
from
31.35
N
mm−2
40.10
mm−2,
IB
0.24
0.39
dry
starch),
reduces
these
PLA
PCL.
wet
method
addition
panels;
however,
it
negatively
influenced
reaction
(WA
90.3%
105.9%
after
24
h
soaking).
Due
dynamically
evaporating
solvents
PCL
binding
mixtures,
development
fibers’
(blending)
techniques
should
be
performed,
avoid
uneven
spreading
over
resinated
material.
Results in Engineering,
Год журнала:
2023,
Номер
20, С. 101480 - 101480
Опубликована: Окт. 6, 2023
Although
biofuels
are
often
presented
as
a
renewable
and
eco-friendly
substitute
to
fossil
fuels,
it
is
crucial
have
comprehensive
understanding
of
the
complete
environmental
consequences
biofuel
production
make
well-informed
choices
about
their
usage.
This
study
evaluated
impacts
producing
biodiesel
from
microwave-assisted
pyrolysis
(MAP)
pine
sawdust
using
life-cycle
assessment.
A
cradle-to-gate
system
boundary
approach
encompassing
cultivation,
biomass
pre-processing,
pyrolysis,
synthesis
via
transesterification
was
used.
The
ecoinvent
v3.7
in
openLCA
v2.0
software
used
assess
sustainability
system.
ReCiPe
2016
(H)
midpoint
impact
assessment
methodology
analyze
18
categories.
results
showed
that
1
kg
MAP
had
environmentally
favorable
for
most
categories
except
global
warming
potential
(1.18
CO2
eq.),
photochemical
oxidant
formation
(0.71
NMVOC
human
toxicity
(2.46
1,4-DCB
eq.).
Biomass
contributed
significantly
warming,
freshwater
ecotoxicity,
toxicity,
marine
ecotoxicity.
Pyrolysis
33
%
due
non-condensable
gas
emissions.
Biofuel
impacted
formation,
terrestrial
mainly
methanol
use.
Implementing
sustainable
practices
such
organic
fertilizers,
optimization
transportation
routes,
implementing
cleaning
technologies
effective
waste
management
can
enhance
performance
this
