Nanoscale,
Год журнала:
2023,
Номер
15(47), С. 19282 - 19291
Опубликована: Янв. 1, 2023
The
way
that
polymer
brushes
respond
to
shear
flow
has
important
implications
in
various
applications,
including
antifouling,
corrosion
protection,
and
stimuli-responsive
materials.
However,
there
is
still
much
learn
about
the
behaviours
mechanisms
govern
these
responses.
To
address
this
gap
knowledge,
our
study
uses
situ
X-ray
reflectivity
investigate
how
poly(styrene
sulfonate)
(PSS)
stretch
change
different
environments,
such
as
isopropanol
(a
poor
solvent),
water
good
aqueous
solutions
containing
cations
(Cs+,
Ba2+,
La3+,
Y3+).
We
have
designed
a
custom
apparatus
exposes
PSS
both
tangential
forces
from
primary
upward
drag
secondary
flow.
Our
experimental
findings
clearly
show
significant
impact
on
chains
are
arranged.
At
low
rates,
force
causes
tilt,
leading
brush
contraction.
In
contrast,
higher
rates
generate
an
stretches
expands
chains.
By
analysing
electron
density
profiles
obtained
reflectivity,
we
gain
valuable
insights
into
structurally,
especially
role
of
diffuse
layer
dynamic
behaviour.
results
highlight
importance
initial
chain
configuration,
which
influenced
by
solvent
present,
shaping
strength
salt
bridge
network
also
plays
crucial
determining
easily
can
stretch,
with
stronger
networks
offering
more
resistance
stretching.
Ultimately,
aims
enhance
understanding
physics
at
interfaces,
particular
focus
practical
applications
involving
brushes.
Results in Chemistry,
Год журнала:
2024,
Номер
7, С. 101486 - 101486
Опубликована: Янв. 1, 2024
This
comprehensive
review
focuses
on
strategies
for
creating
efficient
and
robust
immobilized
biocatalysts.
It
explores
various
physicochemical
approaches
that
hold
promise
enzyme
stabilization
enhancement
of
catalytic
potential.
One
approach
involves
designing
permeable
scaffolds,
emphasizing
the
importance
support
structure
ability
to
fine-tune
biocatalyst
activity.
Another
pathway
is
establishing
covalent
bonds
between
enzymes
surfaces,
anchoring
biocatalysts
longevity
sustained
activity
in
industrial
research
applications.
Polymers
are
also
used
modify
formulation
enzymes,
enhancing
stability
providing
a
versatile
platform
biocatalytic
reactions.
These
particularly
valuable
when
within
pre-established
scaffolds.
They
enable
researchers
engineers
utilize
biocatalysis
diverse
applications,
such
as
biopharmaceutical
production
sustainable
chemical
synthesis.
Furthermore,
these
fixed-stabilized
derivatives
offer
significant
advancements
reaction
optimization
reactor
design.
The
reported
enhancements
remarkable,
with
performance
gains
ranging
from
500
an
impressive
20,000-fold
compared
diluted
soluble
enzymes.
In
summary,
this
highlights
innovative
developing
presents
exciting
avenues
industries
seeking
harness
potential
not
only
enhanced
efficiency
but
contribute
environmentally
friendly
processes.
Journal of Applied Polymer Science,
Год журнала:
2024,
Номер
141(44)
Опубликована: Авг. 20, 2024
Abstract
In
order
to
clarify
the
effect
of
feeding
rate
ratio
(Rsr)
for
polylactic
acid
(PLA)
polyethylene
glycol
(PEG)
on
performance
thermal
regulation
nanofibers,
PLA
and
PEG
solutions
were
used
as
outer
inner
spinning
solutions,
respectively,
develop
PLA/PEG
nanofibers
(NFp‐p)
through
coaxial
electrospinning.
NFp‐p
with
Rsr
2:1,
3:1,
4:1
labeled
PR
1
,
2
3
respectively.
The
morphology,
chemical
structure,
mechanical
properties,
tested,
function
was
investigated.
results
showed
that
increasing
could
increase
diameter
NFp‐p,
having
smallest
average
(520
nm).
had
lowest
water
contact
angle
(122.4°),
higher
enhanced
encapsulation
PEG.
properties
significantly
improved
compared
pure
PLA,
exhibiting
highest
breaking
stress
(2.5
MPa)
strain
(213%).
be
regulated
by
Rsr,
showing
a
more
pronounced
endothermic
peak
due
melting
PEG,
phase‐change
enthalpy
(13.2
J/g).
Lower
superior
performance.
