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| 001 | 884740 | ||
| 005 | 20210130005927.0 | ||
| 024 | 7 | _ | |a 10.1021/acs.langmuir.0c01491 |2 doi |
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| 100 | 1 | _ | |a Schneider, Kristina |0 P:(DE-HGF)0 |b 0 |
| 245 | _ | _ | |a Efficiency Boosting of Surfactants with Poly(ethylene oxide)-Poly(alkyl glycidyl ether)s: A New Class of Amphiphilic Polymers |
| 260 | _ | _ | |a Washington, DC |c 2020 |b ACS Publ. |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 520 | _ | _ | |a 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. |
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| 700 | 1 | _ | |a Frey, Holger |0 0000-0002-9916-3103 |b 5 |
| 700 | 1 | _ | |a Sottmann, Thomas |0 0000-0003-3679-3703 |b 6 |e Corresponding author |
| 773 | _ | _ | |a 10.1021/acs.langmuir.0c01491 |g Vol. 36, no. 33, p. 9849 - 9866 |0 PERI:(DE-600)2005937-1 |n 33 |p 9849 - 9866 |t Langmuir |v 36 |y 2020 |x 1520-5827 |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/884740/files/acs.langmuir.0c01491.pdf |
| 856 | 4 | _ | |y Published on 2020-07-20. Available in OpenAccess from 2021-07-20. |u https://juser.fz-juelich.de/record/884740/files/frielinghaus_Revision_la-2020-01491w_130720.pdf |
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