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@ARTICLE{Schneider:884740,
author = {Schneider, Kristina and Verkoyen, Patrick and Krappel,
Maximilian and Gardiner, Christina and Schweins, Ralf and
Frey, Holger and Sottmann, Thomas},
title = {{E}fficiency {B}oosting of {S}urfactants with
{P}oly(ethylene oxide)-{P}oly(alkyl glycidyl ether)s: {A}
{N}ew {C}lass of {A}mphiphilic {P}olymers},
journal = {Langmuir},
volume = {36},
number = {33},
issn = {1520-5827},
address = {Washington, DC},
publisher = {ACS Publ.},
reportid = {FZJ-2020-03234},
pages = {9849 - 9866},
year = {2020},
abstract = {Twenty years ago, it was found that adding small amounts of
amphiphilic block copolymers like poly(ethylene
propylene)-co-poly(ethylene oxide) (PEP-b-PEO) to
microemul-sion systems strongly increases the efficiency of
medium-chain surfactants to solubilize water and oil.
Although being predestined to serve as a milestone in
microemulsion research, the effect has only scarcely found
its way into applications. In this work, we propose new
types of efficiency boosters, namely, poly(ethylene
oxide)-poly(alkyl glycidyl ether carbonate)s (PEO-b-PAlkGE)
and their “carbonated” poly(ethylene
oxide)-poly(carbonate alkyl glycidyl ether) analogs. Their
synthesis via anionic ring-opening polymerization (AROP)
from commercially available long-chain alkyl glycidyl ethers
(AlkGE) and monomethoxypoly(ethylene glycol)s as
macroinitiators can be performed at low cost and on a large
scale. We demonstrate that these new PEO-b-PAlkGE copolymers
with dodecyl and hexadecyl side chains in the nonpolar block
strongly increase the efficiency of both pure and
technical-grade n-alkyl polyglycol ether surfactants to form
microemulsions containing pure n-alkanes or even
technical-grade waxes, a result that could be of interest
for industrial applications where reduced surfactant needs
would have significant economic and ecological
implications. For n-decane microemulsions, the boosting
effect of PEO-b-PAlkGE and PEP-b-PEO polymers can be scaled
on top of each other, when plotting the efficiency
semilogarithmically versus the polymeric coverage of the
amphiphilic film. Interestingly, a somewhat different
scaling behavior was observed for n-octacosane
microemulsions at elevated temperatures, suggesting that the
polymers show less self-avoidance and rather behave as
almost ideal chains. A similar trend was found for the
increase of the bending rigidity κ upon polymeric coverage
of the amphiphilic film, which was obtained from the
analysis of small-angle neutron scattering (SANS)
measurements.},
cin = {JCNS-FRM-II / JCNS-1 / MLZ},
ddc = {540},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-1-20110106 / I:(DE-588b)4597118-3},
pnm = {6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
/ 6G15 - FRM II / MLZ (POF3-6G15)},
pid = {G:(DE-HGF)POF3-6G4 / G:(DE-HGF)POF3-6G15},
experiment = {EXP:(DE-MLZ)KWS1-20140101},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:32689803},
UT = {WOS:000566338500022},
doi = {10.1021/acs.langmuir.0c01491},
url = {https://juser.fz-juelich.de/record/884740},
}