RSC Advances,
Год журнала:
2021,
Номер
11(39), С. 24206 - 24216
Опубликована: Янв. 1, 2021
The
introduction
of
phosphate
groups
into
cellulosic
fibers
allows
for
the
tuning
their
fire
resistance,
chelating
and
metal-adhesion
properties,
enabling
development
flame-retardant
adhesive
adsorbent
materials.
Toward
that
end,
major
challenge
is
developing
a
novel
efficient
environmentally
friendly
phosphorylation
route
offers
an
alternative
to
existing
methods,
which
can
achieve
targeted
properties.
For
this
purpose,
were
chemically
modified
herein
using
solid-state
with
phosphoric
acid
urea
without
causing
substantial
damage
fibers.
morphological,
physicochemical,
structural
thermal
characterisations
examined
FQA,
SEM,
EDX,
FTIR,
13C/31P
NMR,
conductometric
titration,
zeta
potential
measurement
thermogravimetric
analysis.
All
converge
towards
crosslinked
polyanion
structure,
about
20
wt%
grafted
phosphates,
nitrogen
content
5
very
high
charge
density
6608
mmol
kg-1.
Phosphate
are
linked
cellulose
through
P-O-C
bond
in
form
orthophosphate
pyrophosphates.
Furthermore,
properties
phosphorylated
investigated
new
degradation
mechanism
was
proposed.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2020,
Номер
8(27), С. 10222 - 10229
Опубликована: Июль 2, 2020
A
cellulose
nanofibril-based
flame
retardant
has
been
developed
by
phosphorylation
of
with
P2O5,
promoted
ball
milling
and
followed
treatment
melamine.
The
width
nanofibrils
obtained
through
a
combination
chemical
mechanical
action
was
1.2–4.8
nm.
Phosphorylated
nanofibril
combined
melamine
ionic
bonding
added
to
bamboo
pulp
paper
improve
retardancy.
retardancy
the
loaded
increased
increasing
content.
limiting
oxygen
index
30%
for
30
wt
%
retardant-loaded
paper,
peak
heat
release
rate
62.8%
lower
than
that
control.
showed
remarkable
self-extinguishing
behavior.
dry
wet
tensile
strengths
were
also
enhanced.
RSC Advances,
Год журнала:
2021,
Номер
11(39), С. 24206 - 24216
Опубликована: Янв. 1, 2021
The
introduction
of
phosphate
groups
into
cellulosic
fibers
allows
for
the
tuning
their
fire
resistance,
chelating
and
metal-adhesion
properties,
enabling
development
flame-retardant
adhesive
adsorbent
materials.
Toward
that
end,
major
challenge
is
developing
a
novel
efficient
environmentally
friendly
phosphorylation
route
offers
an
alternative
to
existing
methods,
which
can
achieve
targeted
properties.
For
this
purpose,
were
chemically
modified
herein
using
solid-state
with
phosphoric
acid
urea
without
causing
substantial
damage
fibers.
morphological,
physicochemical,
structural
thermal
characterisations
examined
FQA,
SEM,
EDX,
FTIR,
13C/31P
NMR,
conductometric
titration,
zeta
potential
measurement
thermogravimetric
analysis.
All
converge
towards
crosslinked
polyanion
structure,
about
20
wt%
grafted
phosphates,
nitrogen
content
5
very
high
charge
density
6608
mmol
kg-1.
Phosphate
are
linked
cellulose
through
P-O-C
bond
in
form
orthophosphate
pyrophosphates.
Furthermore,
properties
phosphorylated
investigated
new
degradation
mechanism
was
proposed.
