Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(22)
Published: Feb. 5, 2024
Abstract
Developing
the
elastomer
materials
with
high
mechanical
robustness
through
simple
and
environmentally
friendly
methods
poses
significant
challenges.
In
this
research,
a
solvent‐free
polymerization
method
is
reported
to
synthesize
transparent
polyurea‐urethane
using
polycaprolactone
(PCL)
as
soft
segment
adjusting
various
hard
segments.
The
target
successfully
combine
acceptable
performance
exceptional
crack
tolerance,
whereby
notched
samples
can
readily
lift
25000
times
(a
rarely
value)
its
weight.
Moreover,
superhigh
elastic
restorability
allow
recover
original
dimension
from
elongation
over
5
or
fracture.
These
results
are
attained
due
presence
of
densely
uniformly
distributed
microdomains
within
elastomer,
leading
effective
energy
dissipation.
Furthermore,
owing
linear
structure
molecular
chains
reversible
hydrogen‐bonding
interactions
between
chains,
be
conveniently
healed
recycled
under
heating
conditions.
This
research
provide
general
feasible
strategy
for
construction
comprehensive
properties,
elastomers
expected
applied
in
emerging
fields
such
protective
elements
flexible
electronics.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(40)
Published: June 19, 2024
Abstract
Foam
thermal
insulators
are
indispensable
for
prevailing
energy‐saving
engineering,
however
their
widespread
use
brings
intractability
such
as
unsustainability,
“white
pollution”,
and
fire
hazards.
The
emergence
of
bio‐based
foams
is
highly
appreciated,
but
the
fabrication
approaches
economically
unattractive
and/or
product
properties
inferior,
making
large‐scale
implementation
unviable.
Herein,
a
versatile,
thermally
remoldable
phosphate‐containing
polyurethane
composite
foam
(LPU‐G)
constructed
from
natural
lignin
expanded
graphite
flakes
via
an
atmospheric
pressure
scalable
one‐pot
strategy.
optimal
LPU‐G
exhibits
exceptional
mechanical
strength,
capable
supporting
over
6000
times
its
weight
without
significant
deformation.
Moreover,
demonstrates
desired
multifunctionality
in
handling
extreme
circumstances,
including
humidity‐tolerant
insulation,
superb
water
vapor
barrier,
withstanding
≈1200
°C
flame
ignition.
Based
on
“expansion‐conductivity”
micro‐mechanism,
first
material
to
be
sensitive
alarm
system
with
ultra‐long
time
(>1800
s).
Surprisingly,
can
rapidly
upcycled
into
recyclable
bulk
composites
second
life
through
simple
thermo‐molding
processes
rooted
multi‐dynamic
behavior
phosphate,
carbamate,
hydrogen
bonds.
easy‐to‐scale
represents
new
generation
that
address
concerns
regarding
high
cost,
risk,
inferior
properties.
Materials Chemistry Frontiers,
Journal Year:
2023,
Volume and Issue:
7(17), P. 3494 - 3523
Published: Jan. 1, 2023
This
review
article
summarizes
the
recent
progress
of
self-healing/healable
polyurethanes
and
their
composites
mainly
focuses
on
multiple
construction
methods.
Foods,
Journal Year:
2025,
Volume and Issue:
14(4), P. 579 - 579
Published: Feb. 10, 2025
Allyl
isothiocyanate
(AITC)
is
a
low-molecular-weight
natural
chemical
predominantly
obtained
from
the
autolysis
of
sinigrin,
glucosinolate
found
in
cruciferous
vegetables
like
mustard,
horseradish,
and
wasabi.
AITC
has
sparked
widespread
interest
due
to
its
various
biological
actions,
which
include
strong
antioxidant,
anti-inflammatory,
antibacterial,
anticancer
capabilities.
This
compound
offers
promising
potential
several
fields,
particularly
food
preservation,
medicine,
enhancing
quality
through
means.
AITC's
effectiveness
against
broad
spectrum
microorganisms,
including
foodborne
pathogens
spoilage
agents,
makes
it
an
attractive
alternative
synthetic
preservatives.
The
extend
shelf
life
perishable
foods
important
tool
for
production,
meeting
rising
customer
demand
additives.
In
addition
antimicrobial
effects,
demonstrates
significant
anti-inflammatory
activity,
reducing
levels
pro-inflammatory
cytokines
modulating
key
signaling
pathways,
could
make
valuable
managing
chronic
inflammatory
conditions.
Furthermore,
emerging
research
highlights
cancer
prevention
treatment,
as
been
demonstrated
induce
apoptosis
inhibit
cell
increase
lines,
offering
approach
chemoprevention.
review
delves
into
structure,
metabolism,
bioavailability
freshly
produced
AITC,
providing
comprehensive
overview
beneficial
properties.
Challenges
related
volatility,
dosage
optimization,
regulatory
considerations
are
also
discussed,
alongside
future
directions
enhance
stability
efficacy
AITC-based
formulations.
findings
underscore
role
versatile
bioactive
with
known
support
human
health
sustainable
industry.
Polymers,
Journal Year:
2023,
Volume and Issue:
15(18), P. 3755 - 3755
Published: Sept. 14, 2023
A
series
of
polyurethanes
(PU)
were
synthesised
via
one-step
polymerisation
without
a
chain
extender,
using
toluene
diisocyanate
as
well
variety
soft
segments
composed
different
macrodiols.
Poly(D,L-lactide)
(PDLLA)
and
polycaprolactone
diol
(PCL)
polyester
type
polyols
to
obtain
segments.
The
process
varying
the
molar
ratio
newly
PDLLA
in
has
been
confirmed
powerful
tool
for
fine-tuning
final
properties
PU.
Fourier-transformed
infrared
spectroscopy
was
used
evaluation
molecular
structures
polyol
Nuclear
magnetic
resonance
spectrometry
confirm
presumed
structure
influence
segment
composition
on
polyurethane
thermal
characteristics
examined
thermogravimetric
analysis
differential
scanning
calorimetry.
had
little
impact
stability
PU
materials,
which
is
explained
by
comparable
both
polyols.
Wide-angle
X-ray
scattering
utilised
evaluate
effect
amorphous
degree
crystallinity
PCL
It
discovered
that
not
only
did
have
substantial
microphase
separation
hard
segments,
but
it
also
influenced
crystallisation
behaviour
materials.
Furthermore,
restriction
verified
be
dependent
concentration
PDLLA/PCL
sample
with
pure
component
achieved
highest
(34.8%).
results
demonstrated
directly
affected
obtained
films.
These
can
easily
achieve
desirable
set
required
application
biomaterials.
ACS Applied Polymer Materials,
Journal Year:
2023,
Volume and Issue:
5(6), P. 4536 - 4545
Published: May 24, 2023
Polyurethanes
are
widely
used
polymeric
materials,
but
they
rarely
biorenewable
and
degradable.
Although
some
previously
reported
bio-based
polyurethanes
exhibit
good
thermal
mechanical
properties,
their
bio-content
is
usually
low,
resulting
from
the
only
replacement
of
diol
monomer
instead
whole
diol/diisocyanate
pairs.
In
addition,
traditional
often
difficult
to
degrade,
leading
environmental
issues.
To
address
these
issues,
we
propose
a
solution
by
sourcing
both
diols
isocyanates
resources
introducing
degradability
into
via
Tishchenko
reaction,
which
disproportionation
two
aldehydes
afford
an
ester
bond
with
atom
economy
100%.
Commercially
available
vanillin
was
selected
as
precursor
for
vanillin-based
(VBD)
containing
bonds.
By
reacting
VBD
l-lysine
diisocyanate
(LDI)
trimethylolpropane
(TMP)
crosslinker,
series
thermosetting
polyurethanes,
VBD-TMPx,
high
carbon
content
(>70.0%)
were
synthesized.
The
chemical
structures
properties
monomers
well
polymers
characterized
using
nuclear
magnetic
resonance
(NMR),
Fourier
transform
infrared
(FTIR)
spectroscopy,
thermogravimetric
analysis
(TGA),
differential
scanning
calorimetry
(DSC),
dynamic
(DMA),
tensile
tests.
obtained
VBD-TMPx
comparable
(σ
=
32.0
MPa;
E′
2.7
GPa)
commercial
demonstrate
higher
toughness
(34
MJ/m3)
than
analogues.
Additionally,
inherent
in
enables
complete
degradation
0.1
M
NaOH
(THF/H2O
1:1,
v/v)
within
3.5
h.
This
greatly
broadens
end-of-life
choices,
including
recovery
monomers.
study
presents
facile
approach
creating
degradable
polyurethane
materials
properties.
ACS Applied Polymer Materials,
Journal Year:
2024,
Volume and Issue:
6(3), P. 1813 - 1822
Published: Jan. 29, 2024
We
for
the
first
time
synthesize
a
type
of
biodegradable
CO2-based
oligo(carbonate-ester)
diol
(PPCPDL)
with
aromatic
ester
units
via
one-pot
immortal
copolymerization
using
carbon
dioxide
(CO2)/propylene
oxide
(PO)/phthalic
anhydride
(PA)
as
raw
materials
and
1,
4-butanediol
(BDO)
proton
exchange
agent
(PEA),
respectively,
catalyzed
by
metal-free
triethylborane/triethylamine
(TEB/TEA)
Lewis
pairs.
A
series
PPCPDLs
molar
mass
(Mn)
ranging
from
1100
to
7100
Da
polyester
content
(PE
mol
%)
between
0
36%
were
constructed
tuning
reaction
temperature,
CO2
pressure,
time,
feeding
ratio.
Our
strategy
adopts
PA
third
monomer
incorporate
PE
blocks
into
PPCPDLs,
affording
resulting
thermoplastic
polyurethanes
(TPUs)
improved
thermal/mechanical
properties.
TPU-PPCPDL
aliphatic
carbonate-
polyester-units
can
deliver
highest
tensile
strength
35.2
MPa
hardness
97
(Shore
A),
superior
commercial
diols-based
TPUs.
Twenty
wt
%
propylene
glycol
(PPG)
was
also
introduced
second
soft
segment
TPU-PPCPDLs
endow
obtained
TPUs
various
physical
properties,
including
good
thermal
stability,
light
transmittance,
mechanical
behaviors,
which
indirectly
highlights
application
value
significance
such
building
in
TPU
production.
