Biomass Conversion and Biorefinery,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 4, 2024
Abstract
Searching
for
renewable
raw
materials
that
would
comply
with
the
requirements
of
Green
Chemistry
and
assumptions
sustainable
development
is
an
ongoing
important
problem.
In
present
article,
attempt
was
made
to
obtain
biopolyols
from
selected
solid
plant
fats,
i.e.,
babassu,
cocoa,
coconut,
mango,
palm,
or
shea
oil.
research
performed,
modification
oil
provided
by
a
one-step
solvent-free
transesterification
method,
characterized
hydroxyl
numbers
360
460
mgKOH/g.
Biopolyols
oils
were
subsequently
used
polyurethane
viscoelastic
foams
(PUVFs).
applied
in
amount
10%,
20%,
30%
relative
total
weight
polyols
prepare
PUVFs.
The
obtained
apparent
density
about
100
kg/m
3
,
hardness
2–3
kPa,
comfort
factor
2.5,
resilience
less
than
which
may
be
interesting
industrial
sector
applications
such
as
able
energy
absorbing.
study
analyzed
effect
chemical
structure
on
physicochemical
properties
biopolyols,
well
physical
mechanical
Scientific Reports,
Journal Year:
2024,
Volume and Issue:
14(1)
Published: June 20, 2024
Abstract
Absorption
methods
using
polyurethane
foams
(PUFs)
have
recently
gained
popularity
in
treating
oil
spills.
However,
conventional
petroleum-based
PUFs
lack
selectivity
and
are
commonly
surface-modified
complicated
processes
that
require
toxic
harmful
solvents
to
enhance
their
hydrophobicity
sorption
capacities.
In
this
paper,
a
novel
naturally
superoleophilic
foam
with
inherent
hydrophobic
properties
has
been
developed
through
the
one-shot
foaming
method
integration
of
coconut
oil-based
polyol.
This
bio-based
polyol
was
explicitly
handpicked
as
it
is
chiefly
saturated,
highly
abundant,
inexpensive.
The
characterized
by
an
capacity
range
14.89–24.65
g
−1
for
different
types
oil,
equivalent
578–871
times
its
weight.
Its
behavior
expressed
water
contact
angle
~
139°.
also
showcased
excellent
chemical
stability
high
recyclability
without
significant
loss
absorption
after
20
cycles.
incorporation
shown
improve
morphological,
mechanical,
thermal
foam.
It
can
be
inferred
from
these
findings
material
holds
great
potential
revolutionizing
sorbents,
pioneering
more
sustainable
eco-friendly
functional
produced
via
facile
method.
Polymers,
Journal Year:
2025,
Volume and Issue:
17(5), P. 643 - 643
Published: Feb. 27, 2025
Biobased
organic
diols
derived
from
the
phenolic
aldehyde
by-products
in
depolymerization
of
lignin
(4-hydroxybenzaldehyde,
vanillin,
and
syringaldehyde)
for
synthesis
polyesters
polyurethanes
is
described.
Methods
to
prepare
lignin-based
involved
a
two-step
synthetic
route
using
either
hydroxy
alkylation
reduction
or
an
Williamson-Ether
substitution.
The
preparation
five
(PEs)
ten
(PUs)
was
also
performed
their
physical
thermal
properties
were
analyzed.
DSC
analysis
confirmed
amorphous
nature
all
synthesized
polymers,
GPC
revealed
broad
dispersities
high
molecular
weights.
Two
PE
polyols
vanillin-based
diol
at
concentrations
10
25
wt%
usage
sustainable
PU
foams.
foams
prepared
these
polyols,
where
it
found
that
only
foam
containing
formulation
suitable
mechanical
testing.
samples
have
good
hardness
tensile
strengths
compared
both
control
foams,
showing
potential
incorporation
biobased
formation.
Polymers,
Journal Year:
2025,
Volume and Issue:
17(6), P. 729 - 729
Published: March 10, 2025
This
study
investigates
the
effects
of
microencapsulated
phase-change
materials
(PCMs)
on
density
and
thermal
conductivity
rigid
polyurethane
(PU)
foams,
alongside
their
mechanical
properties.
Introducing
PCMs
into
foam
composition
results
in
increased
viscosity,
complicating
mixing
polyol
isocyanate
components.
viscosity
increase
can
slow
foaming
rate
subsequently
raise
density,
as
observed
both
poured
sprayed
PU
foams
containing
5%
10%
PCM,
leading
to
increases
up
9%.
Despite
these
slight
changes,
remained
relatively
stable
due
preservation
foam’s
closed-cell
structure.
The
evaluation
revealed
a
decrease
compressive
tensile
strength
with
higher
PCM
content
attributed
defects
arising
cellular
architecture.
However,
adhesive
aluminum
substrates
improved,
particularly
possibly
more
consistent
structure
during
slower
process.
Differential
scanning
calorimetry
dynamic
analysis
indicated
that
incorporation
glass
transition
temperature
affected
research
underscores
potential
enhance
functionality
while
needing
careful
consideration
concentration
avoid
compromising
structural
integrity.
ChemistrySelect,
Journal Year:
2025,
Volume and Issue:
10(16)
Published: April 1, 2025
Abstract
Low
molecular
weight
poly(ethylene
carbonate)
diol
(PECD)
synthesized
from
CO
2
and
ethylene
oxide
is
a
kind
of
“green”
polymer
material.
The
derived
PECD
has
excellent
biocompatibility,
biodegradability,
flexibility.
In
this
study,
polyether
polyol
3050
were
used
together
as
soft
segments
to
prepare
flexible
polyurethane
foam.
effects
content
on
thermal
properties,
tensile
tearing
resilience,
compressive
properties
at
different
temperatures
foam
studied
compared.
results
showed
that
with
the
increase
content,
mechanical
composite
enhanced.
Therefore,
potential
application
in
preparation
Macromolecular Materials and Engineering,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 16, 2024
Abstract
This
study
explored
the
feasibility
of
Waste
Cooking
Oil
(WCO)‐based
Bio‐Polyurethane
(Bio‐PU)
as
an
eco‐friendly
alternative
to
petroleum‐derived
polyols
in
plywood
adhesives.
The
objective
is
evaluate
impact
varied
WCO
concentrations
and
methylene
diphenyl
diisocyanate
(MDI)
levels
on
Bio‐PU
performance.
Bio‐PU's
characteristics,
rheology,
functional
groups
are
studied.
Plywood
made
from
three
layers
100
mm
x
×
2
rubberwood
(
Hevea
brasiliensis
)
veneer
bonded
with
using
a
dual
spread
approach
at
180
g.m
−2
,
hot
pressed
120
°C
1
MPa
for
4
min.
laboratory‐fabricated
tested
physical,
mechanical,
adhesive
properties.
Results
showed
that
exhibited
unique
excellent
strength,
despite
slight
decrease
higher
concentrations.
insertion
do
not
compromise
delamination
resistance.
FTIR
analysis
confirmed
successful
polyurethane
chain
synthesis.
research
highlighted
potential
WCO‐based
sustainable,
high‐performance
adhesive.
