Journal of Macromolecular Science Part B,
Journal Year:
2023,
Volume and Issue:
63(10), P. 972 - 984
Published: Dec. 25, 2023
The
importance
of
chitosan
(CH)
has
grown
significantly
over
the
last
two
decades
due
to
its
renewable
and
biodegradable
source,
also
because
recent
increase
in
our
knowledge
functionality
technological
biomedical
applications.
present
article
reviews
biopolymer
CH
derivatives,
as
versatile
biomaterials
for
potential
drug
delivery
systems,
well
tissue
engineering
applications,
analgesia
treatment
arthritis.
natural
antimicrobial
agents,
can
be
applied
biomedical,
biotechnological,
pharmaceutical
Its
activity
depends
on
many
factors
such
molecular
size,
associated
components,
concentration,
type
microorganism.
In
research
described
here
we
prepared
characterized
dynamic
viscosity
rheological
properties
a
material
based
solution
acidic
water.
shear
stress
were
measured
under
influence
an
increasing
concentration
1–10
g/l
temperature
288.15–318.15
K.
Phase Transitions,
Journal Year:
2024,
Volume and Issue:
97(3), P. 212 - 227
Published: Jan. 4, 2024
The
naturally
occurring
polymers
chitosan
(CH)
and
sodium
carboxymethylcellulose
(CMC)
have
attracted
the
interest
of
researchers
in
a
variety
biomedical
pharmaceutical
applications
such
as
drug
delivery,
cosmetics,
tissue
engineering.
However,
CMC
CH
certain
limitations
for
use
controlled
aqueous
CMC/CH
mixed
solutions.
In
this
study,
solutions
with
same
concentration
0.5
g/l
pH
6
are
under
atmospheric
conditions.
effects
temperature
molar
volume
fraction
X1
on
decreased
electrical
conductivity
were
studied
at
different
temperatures
ranging
from
15°C
to
80°C.
We
highlighted
that
regions
can
be
distinguished
complexes,
depending
composition
electrostatic
interactions
solutions,
which
associated
significantly
phase
behaviors.
physica status solidi (a),
Journal Year:
2024,
Volume and Issue:
221(5)
Published: Jan. 26, 2024
The
complex
of
sodium
carboxymethyl
cellulose
(CMC)
and
chitosan
(CH)
in
aqueous
solution
can
be
used
for
biomedical
applications
is
very
beneficial
tissue
engineering,
drug
delivery,
disease
treatment.
This
article
presents
elaboration
properties
the
two
polysaccharides
with
opposite
charges
CMC/CH
solutions.
electrical
conductivity
under
influence
increasing
concentrations
mixtures
from
(0.5
to
10)
g
l
−1
temperatures
288.15
318.15
K
investigated.
reduced
conductivities,
,
energy
activation
Gibbs
free
activations
parameters
enthalpy
()
entropy
are
estimated.
Journal of Macromolecular Science Part B,
Journal Year:
2024,
Volume and Issue:
63(11), P. 1189 - 1202
Published: Feb. 14, 2024
The
interactions
of
naturally
occurring
polymers
and
medicaments,
sodium
carboxymethyl
cellulose
(Na-CMC)
Paracetamol
(PCM),
have
attracted
the
interest
researchers
in
a
variety
biomedical
pharmaceutical
applications
areas,
such
as
drug
delivery,
cosmetics
tissue
engineering.
In
our
research
described
here,
effects
temperature
concentration
Na-CMC/PCM/water
(W)
mixed
solutions
were
studied
at
various
temperatures
ranging
from
20
°C
to
45
°C.
We
highlighted
that
different
regions
can
be
distinguished
aqueous
Na-CMC/PCM/W
complexes,
depending
on
composition
electrostatic
solutions,
which
are
associated
with
significantly
phase
behaviors.
Journal of Macromolecular Science Part B,
Journal Year:
2024,
Volume and Issue:
63(10), P. 941 - 956
Published: Jan. 2, 2024
Sodium
carboxymethylcellulose
Na-CMC
is
derived
from
cellulose
fibers.
Knowledge
of
the
behavior
as
a
charged
polysaccharide
in
solution
important,
because
most
its
biomedical
industrial
applications
utilize
solutions.
The
main
objective
our
research
described
here
was
to
determine
rheological
and
viscometric
properties
solutions
water
(W),
function
cutting
speed
polymer
concentration.
evolution
reduced
dynamic
viscosities
effect
Gibbs
energy
W
were
characterized
temperature
(15
°C
45
°C),
concentration
(1
10)
g/l.
We
identified
three
regimes,
corresponding
dilute
regime,
critical
semi-dilute
regime.
thermodynamic
parameters
viscosity
also
supported
obtained
results.
Our
results
show
that
Na-CMC/W
promising
solvent
mixture
for
use
pharmaceutical
antibacterial
applications.
Physics and Chemistry of Liquids,
Journal Year:
2023,
Volume and Issue:
62(4), P. 248 - 257
Published: Dec. 22, 2023
This
paper
presents
the
experimental
analysis
of
viscosimetric
properties
poly(ethylene
glycol)
(PEG)
in
dimethyl
sulphoxide
DMSO.
By
study
solutions
PEG/DMSO,
dynamic
viscosity
was
measured
under
influence
increasing
PEG
concentration
(1
g/l
to
10
g/l)
and
temperature
(15°C
45°C).
The
reduced
activation
energy
Eη
are
calculated.
polymer
exhibited
a
critical
c**,
separating
dilute
into
extremely
solutions.
most
important
results
refer
found
from
Arrhenius
plots.
dependence
on
solution
is
discussed.
behaviour
can
be
extrapolated
Flory-Huggins
theory
by
decomposing
such
as
=
(Eη)ex
di
+
(Eη)di
(Eη)cri.
described
PEG-DMSO
interaction
represented
function
di.
For
non-Arrhenius
which
between
PEG-PEG
(Eη)di.
interactions
Principles
that
aid
one
understand
interpret
Journal of Macromolecular Science Part B,
Journal Year:
2024,
Volume and Issue:
unknown, P. 1 - 19
Published: May 3, 2024
The
naturally
occurring
polymers,
chitosan
(CH)
and
poly(N-vinyl-pyrrolidone
(PVP),
have
attracted
the
interest
of
researchers
in
a
variety
biomedical
pharmaceutical
applications
areas,
such
as
drug
delivery,
cosmetics,
tissue
engineering.
However,
PVP
CH
certain
limitations
for
use
controlled
aqueous
CH/PVP
mixed
solutions.
In
this
study
solutions
with
same
concentration
10
g/l
pH
6
were
under
atmospheric
conditions.
effects
temperature
molar
volume
fraction,
X1,
on
decreased
dynamic
viscosity
studied
at
various
temperatures
ranging
from
15
°C
to
80
°C.
We
highlighted
that
different
regions
can
be
distinguished
complexes,
depending
composition
electrostatic
interactions
solutions,
which
are
associated
significantly
phase
behaviors.
Physics and Chemistry of Liquids,
Journal Year:
2024,
Volume and Issue:
unknown, P. 1 - 10
Published: May 23, 2024
Paracetamol
(PC),
the
active
ingredient
in
Efferalgan,
is
an
effervescent
tablet
medicine
used
treatment
of
mild-to-moderate
pain.
Chitosan
(CH)
a
biopolymer
having
immense
structural
possibilities
for
chemical
and
mechanical
modifications
to
generate
novel
properties,
functions
applications,
especially
pharmaceutical
area.
The
dynamic
viscosities,
η,
have
been
measured,
investigated
mixture
CH
acidic
water
paracetamol
aqueous
solutions
over
entire
range
temperature
20–65°C,
concentrations
1–10
g/l.
main
objective
our
research
described
here
was
determine
viscometric
properties
PC,
as
function
volume
fraction
fCH
PC
temperatures.
We
identified
three
concentration
regimes,
corresponding
dilute
regime,
critical
regime
semi-dilute
regime.
Our
results
showed
that
CH/PC
promising
use
antibacterial
applications.
chitosan
shows
antimicrobial
activity
against
various
microorganisms,
including
bacteria.
