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000884740 041__ $$aEnglish
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000884740 1001_ $$0P:(DE-HGF)0$$aSchneider, Kristina$$b0
000884740 245__ $$aEfficiency Boosting of Surfactants with Poly(ethylene oxide)-Poly(alkyl glycidyl ether)s: A New Class of Amphiphilic Polymers
000884740 260__ $$aWashington, DC$$bACS Publ.$$c2020
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000884740 520__ $$aTwenty 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.
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000884740 7001_ $$0P:(DE-HGF)0$$aVerkoyen, Patrick$$b1
000884740 7001_ $$0P:(DE-HGF)0$$aKrappel, Maximilian$$b2
000884740 7001_ $$0P:(DE-HGF)0$$aGardiner, Christina$$b3
000884740 7001_ $$00000-0001-8078-2089$$aSchweins, Ralf$$b4
000884740 7001_ $$00000-0002-9916-3103$$aFrey, Holger$$b5
000884740 7001_ $$00000-0003-3679-3703$$aSottmann, Thomas$$b6$$eCorresponding author
000884740 773__ $$0PERI:(DE-600)2005937-1$$a10.1021/acs.langmuir.0c01491$$gVol. 36, no. 33, p. 9849 - 9866$$n33$$p9849 - 9866$$tLangmuir$$v36$$x1520-5827$$y2020
000884740 8564_ $$uhttps://juser.fz-juelich.de/record/884740/files/acs.langmuir.0c01491.pdf
000884740 8564_ $$uhttps://juser.fz-juelich.de/record/884740/files/frielinghaus_Revision_la-2020-01491w_130720.pdf$$yPublished on 2020-07-20. Available in OpenAccess from 2021-07-20.
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