Forests,
Год журнала:
2023,
Номер
14(7), С. 1457 - 1457
Опубликована: Июль 16, 2023
The
isolation
and
bottom-up
assembly
of
nano-cellulose
by
using
microorganisms
offers
unique
advantages
that
fine-tune
meet
the
main
key
design
criteria
sustainability,
rapid
renewability,
low
toxicity
scalability
for
several
industrial
applications.
As
a
biomaterial,
properties
are
required
to
maintain
quality
functional
period
any
product.
Thus,
researchers
nowadays
extensively
enhance
yield
plant
nanocellulose.
A
microbial
process
requires
approximately
20%–50%
less
energy
compared
chemical
consumes
high
due
need
intense
mechanical
processing
harsh
treatments.
can
also
reduce
production
costs
around
30%–50%
use
renewable
feedstocks,
fewer
additives,
simplified
purification
steps.
is
typically
more
expensive
extensive
chemicals,
complex
steps,
higher
requirements.
yields
nanocellulose
with
well-defined
uniform
dimensions,
leading
improved
enhanced
performance
in
various
applications,
process,
which
may
result
wider
range
sizes,
potentially
variations
performance.
present
review
discusses
role
different
(bacteria,
yeasts
fungi)
types
from
sources
discussed
show
differences
among
them,
showing
their
products
isolation.
Finally,
challenges
propositions
regarding
isolation,
enhancement
addressed.
TAPPI Journal,
Год журнала:
2025,
Номер
24(2), С. 74 - 88
Опубликована: Фев. 27, 2025
Cellulose
microspheres,
which
have
mainly
been
produced
via
the
sol-gel
method
up
until
now,
exhibit
a
promising
potential
for
broad
applications
due
to
their
regular
microstructure
and
renewability.
However,
some
issues
with
production
of
cellulose
such
as
recycling
involved
organic
solvents
removal
residual
solvents,
should
be
solved.
In
this
study,
nanocrystals
(CNCs)
suspension
was
used
produce
microspheres
spray
drying
in
order
avoid
use
solvents.
The
effects
CNCs
particle
size,
concentration,
inlet
temperature
on
size
were
investigated.
results
indicated
that
optimal
average
concentration
obtaining
micro-spheres
106
nm
0.1
wt%,
respectively.
Under
conditions,
spherical
morphology
an
ca.
3
μm
obtained.
sulfuric
acid
hydrolysis
process
barely
affected
crystalline
structure
cellulose.
introduced
sulfhydryl
groups,
confirmed
by
Fourier
transform
infrared
spectroscopy
results,
degraded
thermostability
Generally
speaking,
converting
is
beneficial
promoting
controllable
continuous
microspheres.
ABSTRACT
With
the
demand
for
sustainable
preparation
of
nanocellulose,
extraction
holocellulose
nanofibers
with
surface‐coated
hemicellulose
from
various
biomass
is
drawing
more
and
attention.
However,
detailed
processes
some
fundamental
properties
nanofibers,
such
as
rheological
behavior
redispersibility,
still
need
systematic
investigation.
An
in‐depth
understanding
these
plays
a
crucial
role
in
guiding
subsequent
material
design
nanofibers.
Herein,
concise
method
reported
to
prepare
bamboo‐derived
(BHCNFs)
bamboo
residue
has
been
characterized
detail.
To
facilitate
application,
comprehensive
exploration
BHCNF
were
conducted,
along
an
investigation
into
redispersibility
after
freeze‐drying.
The
presence
significantly
affects
gives
certain
redispersibility.
achieve
better
aerogel
powder
was
prepared
via
spray
freeze‐drying,
offering
new
insights
drying
practical
application
BHCNF.
Advanced Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 2, 2024
Abstract
Transient
technology
involves
materials
and
devices
that
undergo
controlled
degradation
after
a
reliable
operation
period.
This
groundbreaking
strategy
offers
significant
advantages
over
conventional
based
on
non‐renewable
by
limiting
environmental
exposure
to
potentially
hazardous
components
disposal,
increasing
material
circularity.
As
the
most
abundant
naturally
occurring
polymer
Earth,
cellulose
is
an
attractive
for
this
purpose.
Besides,
(nano)celluloses
are
inherently
biodegradable
have
competitive
mechanical,
optical,
thermal,
ionic
conductivity
properties
can
be
exploited
develop
sustainable
avoid
end‐of‐life
issues
associated
with
systems.
Despite
its
potential,
few
efforts
been
made
review
current
advances
in
cellulose‐based
transient
technology.
Therefore,
catalogs
state‐of‐the‐art
developments
enabled
cellulosic
materials.
To
provide
wide
perspective,
various
mechanisms
involved
introduced.
The
advanced
capabilities
of
systems
sensing,
photonics,
energy
storage,
electronics,
biomedicine
also
highlighted.
Current
bottlenecks
toward
successful
implementation
discussed,
circularity
impact
metrics
at
center.
It
believed
will
serve
as
valuable
resource
proliferation
into
fully
integrated,
circular,
environmentally
devices.
Cellulose,
Год журнала:
2024,
Номер
31(11), С. 6733 - 6746
Опубликована: Июнь 20, 2024
Abstract
Nanocellulose
fibres
are
known
to
enhance
the
mechanical
properties
of
biopolymers
when
added
as
a
filler.
irreversibly
agglomerates
upon
drying
and
is
therefore
sold
an
aqueous
gel
or
suspension,
increasing
shipping
cost
limiting
application.
This
work
studied
utility
xanthan
gum
dispersant
aid
for
dried
nanocellulose
fibres.
At
levels
low
15%
addition,
based
on
mass
nanocellulose,
prior
drying,
agglomeration
was
significantly
decreased.
Mild
shear
rates
could
disperse
similar
degree
ultrasonication
present.
Several
complementary
techniques,
such
rheology,
turbidimetry,
SEM-
TEM-imaging,
proved
that
native
be
recovered
after
drying.
Xanthan
incorporated
into
thermoplastic
starch,
showed
synergistic
effect
regarding
increase
in
tensile
strength
resultant
biopolymer
film.
The
addition
previously
nanocellulose/xanthan,
4:1
ratio,
starch
at
starch-cellulose
ratio
20:1,
increased
from
5.4
23.0
MPa.
ability
produce
dispersible
dry
product
retains
its
has
clear
commercial
benefits.
