Insights into the critical role of anions in nanofibrillation of cellulose in deep eutectic solvents
Abstract
Complex
interactions
between
cellulose
molecules
and
small
can
lead
to
dramatic
changes
in
the
structure
of
hydrogen
bond
network
green
sustainable
deep
eutectic
solvents
(DESs).
However,
molecular
ionic
evolution
mechanism
DESs
on
nanofibrillation
is
still
unclear.
In
this
study,
critical
role
action
ions
were
investigated.
The
results
showed
that
nanofiber
(CNF)
with
a
diameter
less
than
200
nm
be
prepared
directly
by
DES
containing
lactic
acid
(LA)
chloride
(LA/ammonium
(NH4Cl)
LA/dodecyltrimethylammonium
(DTAC)
nm,
LA/zinc
(ZnCl2)
100
nm).
Kamlet-Abboud-Taft
parameters
(KAT
value)
LA
have
higher
acidity
(α )
other
systems
(such
as
ethylene
glycol
urea)
without
LA,
which
provide
more
active
protons
improve
proton
mobility
nanofibrillation.
And
composed
Cl−
high
alkalinity
(β ),
great
original
form
new
structure,
thus
making
deconstruction
easy.
Thus,
esterified
hydroxyl
groups
under
high-temperature
moistening
conditions,
CNF
system
had
highest
degree
substitution
(DS)
(up
0.73
LA/ZnCl2
system)
after
moistening.
Research Square (Research Square), Год журнала: 2023, Номер unknown
Опубликована: Ноя. 9, 2023
Язык: Английский
