The Journal of Physical Chemistry B,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 7, 2025
Strong
interactions
of
polyelectrolytes
(PEs)
with
water
have
been
used
to
control
many
technological
applications
PEs
in
cryopreservation
as
well
anti-icing
or
lubricating
coatings.
In
all
these
cases,
knowledge
the
phase
diagrams
PE
is
important,
particularly
at
low
temperatures,
where
ice
more
stable.
this
work,
we
study
negatively
and
positively-charged
by
using
infrared
spectroscopy
(IR)
differential
scanning
calorimetry
(DSC).
The
results
show
a
coexistence
curve
equilibrium
PE-rich
water.
for
positively-
negatively-charged
were
similar,
nearly
40%
volume
fraction
polymer
remains
unfrozen.
Comparison
collected
data
predictions
from
theoretical
model
based
on
Gibbs-Thomson
Flory-Huggins
models
reveals
that
concentrated
PE-water
has
closely
associated
counterions,
entropy
counterions
does
not
play
dominant
role.
This
finding
surprising
since
are
expected
strongly
dissociated
charges
under
conditions.
Interestingly,
also
found
evidence
stable
unfrozen
change
upon
further
cooling
-100
°C.
These
observations
important
controlling
formation
critical.
Trends in Food Science & Technology,
Journal Year:
2024,
Volume and Issue:
147, P. 104463 - 104463
Published: March 25, 2024
Process
analysis
is
an
important
step
for
online
food
quality
control
during
processing.
Among
the
emerging
non-destructive
examination
techniques
that
offer
rapid
detection,
terahertz
spectroscopy
has
attracted
attention
in
analysing
processes
based
on
various
parameters.
Moreover,
calibration
and
chemometric
methods
are
frequently
used
spectral
data
analysis.
The
system
normally
consists
of
processing
equipment
time-domain
imaging
(THz-TDS),
which
often
exhibits
high
prediction
accuracy
combined
with
appropriate
chemometrics
methods.
Therefore,
been
considered
highly
suitable
on-site
in-situ
process
to
enhance
manufacturing
thus
improve
product
quality.
In
this
review,
applications
THz-TDS
dehydration,
storage,
freezing,
fermentation,
as
well
other
areas,
introduced
discussed.
these,
technology
intensive
research
related
moisture
changes,
such
dehydration
storage
under
natural
drying
conditions.
Emerging
techniques,
hot
air
(HAD)
microwave
vacuum
(MVD),
investigated.
Applications
including
hygroscopic
processes,
were
also
reported.
For
freezing
analysis,
it
mainly
analyze
(i)
effect
repeated
thawing
meat
(ii)
growth
rate
ice
crystals.
fermentation
processing,
although
most
confirmed
feasibility
THz-TDS,
further
investigation
regarding
still
awaited.
combination
widely
employed
non-linear
changes
attributes
emergence
numerous
recent
years.
It
content
polar
substances
hydrogen
sulfide
ammonia.
Despite
performance,
drawbacks
cost,
interference
from
content,
disturbance
constituents
protein
significant
obstacles
universalization
THz-TDS.
Chemical Engineering Journal,
Journal Year:
2024,
Volume and Issue:
488, P. 151143 - 151143
Published: April 8, 2024
Icing
and
frosting
always
cause
troubles
in
present-day
human
activities,
appealing
for
effective
anti-freezing
strategies
to
break
through
the
bottleneck.
Inspired
by
"predominant
metabolites
body
fluid
of
cold-tolerant
animals"
"poikilotherms
that
increase
temperature
absorbing
solar
energy",
natural
deep
eutectic
solvents
(NADES)
carbon
nanotubes
(CNTs)
were
incorporated
within
calcium
alginate
(CA)
backbone
fabricate
dual-bioinspired
ultra-flexible
photothermal
eutectogels
(CNTs/NADES@CA).
Normal
CNTs
(nCNTs)
hydroxylated
(hCNTs)
used
investigate
effects
hydrogen-bonding
networks
NADES
on
dispersal/aggregation
behaviours
nCNTs/hCNTs.
Molecular
dynamics
(MD)
simulation
proved
hCNTs
could
form
intense
interactions
with
disperse
more
uniformly,
ultimately
contributing
better
mechanical
properties.
Spectral
characteristics
covering
absorption
infrared
emissivity
showed
higher
nanofiller
loading
increased
emissivity,
leading
thermal
energy
loss
during
conversion.
Besides,
moisture
absorption–desorption
tests
further
confirmed
excellent
function
reproducibility
sustainability
materials.
One
hCNTs-based
(4%-hCNTs)
behaving
best
conversion
was
selected
concerning
anti-frosting,
anti-icing,
deicing
capacities,
announcing
CNTs/NADES@CA
be
highly
efficient
passive
anti-freezing.
This
study
proposed
a
dispersion
strategy
enabled
eutectogel
physically
simple
method,
it
is
hoped
this
work
open
up
new
avenues
bioinspired
materials
attract
concerns
strategy.
