ACS Sustainable Chemistry & Engineering,
Год журнала:
2024,
Номер
12(47), С. 17301 - 17318
Опубликована: Ноя. 14, 2024
The
issue
of
fire
hazard
safety
with
regard
to
materials
is
great
concern.
Polybutylene
terephthalate/butylene
terephthalate
(PBAT)
the
most
extensively
researched
and
utilized
biodegradable
material.
However,
absence
flame-retardant
chain
segments
in
its
molecular
structure
poses
a
significant
environmental
hazard.
Our
team
utilizes
reversibility
polymerization
reaction
PBT
(polybutylene
terephthalate)
chemical
recycling
process
degrade
into
BHBT
(butylene
terephthalate),
raw
material
for
preparation
PBAT.
At
same
time,
together
halogen-free
environmentally
friendly
CEPPA
(3-hydroxyphenylphosphinyl-propanoic
acid)
BHAT
glycol
adipate),
we
design
produce
an
highly
efficient
PBAT
copolyester
(PBATcept).
closed-loop
nonbiodegradable
small-molecule
oligomers
(BHBT)
PBATcept
was
realized.
successful
introduction
segment
demonstrated
result
reduction
crystalline
properties
improvement
transparency
flame
retardancy.
5.0
mol
%
resulted
tensile
strength
10.93
±
0.97
MPa
elongation
at
break
830.40
48.25%
PBATcept5.0.
Furthermore,
LOI
value
32.0%,
UL-94
rating
V-0.
exerts
synergistic
effects
gas-phase
retardancy
condensed-phase
PBATcept.
During
combustion,
undergoes
preferential
decomposition,
generating
nonflammable
gases
(H2O
CO2)
impede
combustion
dilute
concentration
flammable
gases.
Concurrently,
it
forms
dense
carbon
layer
on
surface
polymer,
which
mitigates
hazards
associated
due
fire.
hydrolysis
retardant
enhances
biodegradation
performance
relative
rate
can
reach
33.92%
after
30
days
when
addition
amount
10.0
%.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2024,
Номер
12(35), С. 13231 - 13243
Опубликована: Авг. 22, 2024
Biodegradable
thermal
insulation
foams
are
drawing
widespread
attention
due
to
the
growing
environmental
pollution
and
energy
waste.
Polymer-based
characterized
by
flexibility,
recyclability,
excellent
insulation,
hold
immense
promise
for
application
domains
aimed
at
decreasing
Poly(butylene
adipate-co-terephthalate)
(PBAT)
has
been
widely
employed
in
terms
of
its
superior
mechanical
properties
acknowledged
biodegradability.
However,
owing
poor
foamability
inherent
shrinkage
PBAT,
it
is
still
challenging
prepare
high-performance
PBAT
with
insulation.
Herein,
biodegradable
polycaprolactone
(PCL)
crystalline
particles
were
introduced
into
matrix.
High
strength
recyclable
multifunctional
prepared
physical
foaming
process.
The
presence
PCL
can
improve
crystallization
promote
formation
open-cell
structures.
Thanks
heterogeneous
nucleation
special
structure,
achieved
PBAT/PCL
foam
shows
ultralow
density
(0.04
g/cm3),
restricted
ratio
(<5%),
enhanced
capacity
(32.5
mW/m·K),
good
hydrophobicity
(106.0°).
More
importantly,
compared
other
degradable
polymer
foams,
degradation
ability
soil.
Our
method
offers
a
novel
alternative
producing
environmentally
friendly,
recyclable,
without
worries
regarding
biodegradability
that
linked
nondegradable
materials.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 3, 2024
Biobased
poly(lactic
acid)
(PLA)/poly(butylene
succinate)
(PBS)
foams
with
excellent
oil–water
separation
capability
were
fabricated
using
supercritical
fluid
foaming.
PBS
acts
as
the
cell-opener
and
nucleating
agent,
introduction
of
a
chain
extender
(a
multifunctional
epoxide
oligomer,
Joncryl
ADR-4468,
ADR)
enhances
compatibility
between
PLA
improves
rheological
properties
PLA/PBS.
6
wt
%
(PLA/PBS6)
exhibits
high
expansion
ratio
52
an
open
cell
content
97.9%.
It
is
notable
that
different
structures
varying
sizes
show
significant
differences
in
adsorption
capacity
rate.
Compared
to
PLA/PBS9
foam
similar
open-cell
content,
PLA/PBS6
has
increased
from
18.8
24.5
g/g,
but
rate
constant
decreased.
Smaller
cells
are
more
effective
at
increasing
capacity,
while
larger
ones
beneficial
reducing
saturation
time.
shows
contact
angle
139°
deionized
water,
oil
capacities
ranging
50.7
retains
84.3%
its
CCl4
after
10
cycles.
degrades
over
90%
5
days
alkaline
environments
(pH
=
13).
The
work
provides
novel
strategy
for
green
fabrication
ultralight
outstanding
properties.
expected
meet
requirements
situations
by
regulating
structure
size
distribution
via
controlling
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 9, 2025
Abstract
With
the
increasing
frequency
of
extreme
cold
conditions
and
emphasis
on
sustainable
economic
development,
there
is
an
escalated
demand
for
eco‐friendly
fabrication
thermal
insulation
noise
absorption
materials.
These
materials
must
strike
optimal
balance,
effectively
minimizing
excessive
loss
heat
from
internal
spaces
while
simultaneously
mitigating
intrusion
external
industrial
activities.
The
existing
uniform
cellular
structures
exhibit
limited
capabilities.
Herein,
inspired
by
natural
gradient
structures,
a
robust
biodegradable
foam
that
integrates
continuous
cell
structure
excellent
directly
designed
via
pioneering
Pre‐N
2
foaming
strategy.
Through
modulation
physical
blowing
agent
type
in
first
stage
incomplete
adsorption
time
gas
second
stage,
concentration
can
be
established,
facilitating
formation
foams.
lightweight
achieves
remarkable
coefficient
0.83.
In
comparison
to
foam,
gradient‐structured
shows
74%
improvement
ball
rebound
resilience.
Notably,
its
biodegradability
600%
higher
than
structure.
controllable
synthesis
foams
opens
promising
avenue
development
multifunctional
