Molecules,
Journal Year:
2024,
Volume and Issue:
29(8), P. 1725 - 1725
Published: April 11, 2024
The
use
of
surfactants
in
oil
recovery
can
effectively
improve
crude
rate.
Due
to
the
enhanced
salt
and
temperature
resistance
surfactant
molecules
by
non-ionic
chain
segments,
anionic
groups
have
good
emulsifying
stability.
Currently,
there
are
many
studies
on
for
China,
but
is
relatively
little
systematic
research
introducing
EOs
into
hydrophobic
alkyl
chains,
especially
their
self-assembly
behavior.
This
article
proposes
a
simple
effective
synthesis
method,
using
3-aminopropane
sulfonic
acid,
fatty
alcohol
polyoxyethylene
ether,
epichlorohydrin
as
raw
materials,
insert
EO
chains
synthesize
series
new
Gemini
(CnEO-5,
n
=
8,
12,
16).
surface
activity,
thermodynamic
properties,
behavior
these
were
systematically
studied
through
tension,
conductivity,
steady-state
fluorescence
probes,
transmission
electron
microscopy,
molecular
dynamics
simulations.
tension
test
results
show
that
CnEO-5
has
high
activity
higher
than
traditional
single
structurally
similar
surfactants.
Additionally,
parameters
(e.g.,
ΔG°mic
ΔH°mic
ΔS°mic
et
al.
indicate
exothermic
spontaneous
during
micellization
process.
DLS,
p-values,
TEM
with
shorter
(such
C8EO-5)
tend
form
larger
vesicles
aqueous
solutions,
which
formed
tail
staggered
manner;
Negative
longer
C12EO-5,
C16EO-5)
small
micelles.
certain
application
prospects
improving
recovery.
Langmuir,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 23, 2025
The
anticorrosion
properties
of
three
amide-linked
alkylpyridinium
gemini
surfactants
(ALAPGS),
viz.,
3,3'-(propanediamide)bis(1-n-dodecylpyridinium)
dibromide
(ALDPGS),
3,3'-(propanediamide)bis(1-n-tetradecylpyridinium)
(ALTPGS),
and
3,3'-(propanediamide)bis(1-n-octadecylpyridinium)
(ALOPGS),
were
studied
on
low-carbon
steel
in
3.5%
NaCl
through
weight
loss,
electrochemical
impedance
spectroscopy
(EIS),
potentiodynamic
polarization
(PDP)
methods.
anticorrosive
efficiency
ALAPGS
was
contingent
upon
the
concentration
length
alkyl
tails.
In
addition,
corrosion
inhibition
found
to
be
highest
when
reaches
close
critical
micelle
(cmc)
followed
order
ALOPGS
>
ALTPGS
ALDPGS.
results
obtained
from
EIS
agreed
with
findings
PDP
loss
experiments.
studies
indicated
that
acts
as
a
mixed-type
inhibitor.
Furthermore,
morphology
scanning
electron
microscopy
atomic
force
microscopy.
Molecular
dynamics
simulations
conducted
understand
interaction
between
steel.
suggested
are
effective
inhibitors
for
