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000825979 037__ $$aFZJ-2017-00251
000825979 041__ $$aEnglish
000825979 1001_ $$0P:(DE-Juel1)130646$$aFrielinghaus, Henrich$$b0$$eCorresponding author$$ufzj
000825979 1112_ $$a11. International Conference on Polarised Neutrons for Condensed Matter Investigations 2016$$cFreising$$d2016-07-04 - 2016-07-07$$gPNCMI 2016$$wGermany
000825979 245__ $$aThe effect of amphiphilic polymers with a continuous philicity profile on the membrane properties in a bicontinuous microemulsions studied by neutron scattering
000825979 260__ $$c2016
000825979 3367_ $$033$$2EndNote$$aConference Paper
000825979 3367_ $$2DataCite$$aOther
000825979 3367_ $$2BibTeX$$aINPROCEEDINGS
000825979 3367_ $$2DRIVER$$aconferenceObject
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000825979 3367_ $$0PUB:(DE-HGF)6$$2PUB:(DE-HGF)$$aConference Presentation$$bconf$$mconf$$s1484489564_25212$$xOther
000825979 520__ $$aWherever surfactants are applied, it is of general interest to use as little surfactant as possible. However, in e.g. microemulsion systems increasing the solubilization capacity of an amphiphilic mixture is always accompanied by the formation of liquid crystalline mesophases. Integrating amphiphilic block copolymers (so called efficiency boosters) into the amphiphilic film leads to a considerable increase of the efficiency. This effect is mainly due to an increase of the bending rigidity of the amphiphilic film due to the presence of polymer domains on either side of the film. The formation of liquid crystalline mesophases was found to be suppressed at low concentrations of blockcopolymers, while it was enhanced at high concentrations. To break this trade-off between surfactant efficiency and the stabilization of liquid crystalline phases we studied a new class of amphiphilicpolymers - so called tapered polymers - following the amphiphilicity profile going from diblock via triblock to continuously tapered [1]. In contrast to the commonly used diblock or triblock copolymersthe molecular structure of tapered polymers gradually changes from hydrophilic to hydrophobic. The influence of this new class of polymers on the properties of microemulsion systems was investigatedby systematic phase behaviour studies, SANS (small angle neutron scattering) and NSE (neutron spin echo) experiments. These measurements reveal that the polymers cause a stiffening of the amphiphilicfilm while simultaneously the saddle splay modulus increases considerably less such that the formation of liquid crystalline mesophases is suppressed while bicontinuous structures aregeometrically favored. In addition, these findings are supported by theoretical calculations following the works of Lipowsky [2]. Hence tapered amphiphilic polymers not only increase the efficiency ofsurfactants, but simultaneously suppress the formation of liquid crystalline phases, and, thereby, greatly increasing their application potential.The underlying NSE experiments for this interpretation rely on smallest changes of the relaxation curves (of ca. 1% steps) for still small changes of the bending rigidity (of ca. 10% steps). This high reliability of the experiments conducted at the SNS-NSE displays the accuracy of the instrument itself and the latest developments of the evaluation software, which were necessary to interpret such tiny changes of the bending rigidity reliably.[1] H.F.M. Klemmer, J. Allgaier, H. Frielinghaus, O. Holderer, Soft Matter (submitted) 2016.[2] C. Hiergeist, R. Lipowsky, Journal de Physique II, 6, 1465-1481 (1996)
000825979 536__ $$0G:(DE-HGF)POF3-6215$$a6215 - Soft Matter, Health and Life Sciences (POF3-621)$$cPOF3-621$$fPOF III$$x0
000825979 536__ $$0G:(DE-HGF)POF3-6G15$$a6G15 - FRM II / MLZ (POF3-6G15)$$cPOF3-6G15$$fPOF III$$x1
000825979 536__ $$0G:(DE-HGF)POF3-6G4$$a6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)$$cPOF3-623$$fPOF III$$x2
000825979 65027 $$0V:(DE-MLZ)SciArea-210$$2V:(DE-HGF)$$aSoft Condensed Matter$$x0
000825979 65017 $$0V:(DE-MLZ)GC-1602-2016$$2V:(DE-HGF)$$aPolymers, Soft Nano Particles and  Proteins$$x0
000825979 693__ $$0EXP:(DE-MLZ)KWS1-20140101$$1EXP:(DE-MLZ)FRMII-20140101$$5EXP:(DE-MLZ)KWS1-20140101$$6EXP:(DE-MLZ)NL3b-20140101$$aForschungs-Neutronenquelle Heinz Maier-Leibnitz $$eKWS-1: Small angle scattering diffractometer$$fNL3b$$x0
000825979 693__ $$0EXP:(DE-MLZ)MARIA-20140101$$1EXP:(DE-MLZ)FRMII-20140101$$5EXP:(DE-MLZ)MARIA-20140101$$6EXP:(DE-MLZ)NL5N-20140101$$aForschungs-Neutronenquelle Heinz Maier-Leibnitz $$eMARIA: Magnetic reflectometer with high incident angle$$fNL5N$$x1
000825979 693__ $$0EXP:(DE-MLZ)J-NSE-20140101$$1EXP:(DE-MLZ)FRMII-20140101$$5EXP:(DE-MLZ)J-NSE-20140101$$6EXP:(DE-MLZ)NL2ao-20140101$$aForschungs-Neutronenquelle Heinz Maier-Leibnitz $$eJ-NSE: Neutron spin-echo spectrometer$$fNL2ao$$x2
000825979 693__ $$0EXP:(DE-Juel1)SNS-NSE-20150203$$5EXP:(DE-Juel1)SNS-NSE-20150203$$eSNS-NSE: Neutron Spin Echo Spectrometer$$x3
000825979 7001_ $$0P:(DE-HGF)0$$aHelge Klemmer, Uni Köln$$b1
000825979 7001_ $$0P:(DE-Juel1)130501$$aAllgaier, J.$$b2$$ufzj
000825979 7001_ $$0P:(DE-Juel1)130718$$aHolderer, Olaf$$b3$$ufzj
000825979 8564_ $$uhttp://www.fz-juelich.de/jcns/EN/Leistungen/ConferencesAndWorkshops/JCNSWorkshops/History/2016PNCMI/_node.html
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000825979 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)130501$$aForschungszentrum Jülich$$b2$$kFZJ
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000825979 9131_ $$0G:(DE-HGF)POF3-621$$1G:(DE-HGF)POF3-620$$2G:(DE-HGF)POF3-600$$3G:(DE-HGF)POF3$$4G:(DE-HGF)POF$$9G:(DE-HGF)POF3-6215$$aDE-HGF$$bForschungsbereich Materie$$lVon Materie zu Materialien und Leben$$vIn-house research on the structure, dynamics and function of matter$$x0
000825979 9131_ $$0G:(DE-HGF)POF3-6G15$$1G:(DE-HGF)POF3-6G0$$2G:(DE-HGF)POF3-600$$3G:(DE-HGF)POF3$$4G:(DE-HGF)POF$$9G:(DE-HGF)POF3-6G15$$aDE-HGF$$bForschungsbereich Materie$$lGroßgeräte: Materie$$vFRM II / MLZ$$x1
000825979 9131_ $$0G:(DE-HGF)POF3-623$$1G:(DE-HGF)POF3-620$$2G:(DE-HGF)POF3-600$$3G:(DE-HGF)POF3$$4G:(DE-HGF)POF$$9G:(DE-HGF)POF3-6G4$$aDE-HGF$$bForschungsbereich Materie$$lVon Materie zu Materialien und Leben$$vFacility topic: Neutrons for Research on Condensed Matter$$x2
000825979 9141_ $$y2016
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000825979 920__ $$lyes
000825979 9201_ $$0I:(DE-Juel1)JCNS-FRM-II-20110218$$kJCNS (München) ; Jülich Centre for Neutron Science JCNS (München) ; JCNS-FRM-II$$lJCNS-FRM-II$$x0
000825979 9201_ $$0I:(DE-Juel1)JCNS-1-20110106$$kNeutronenstreuung ; JCNS-1$$lNeutronenstreuung $$x1
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