This title appears in the Scientific Report : 2014 

Anchoring vs Bridging: New Findings on Polymer Additives in Bicontinuous Microemulsions
Maccarrone, Simona (Corresponding author)
Allgaier, J. / Frielinghaus, Henrich / Richter, Dieter
Neutronenstreuung ; ICS-1
JCNS-FRM-II; JCNS-FRM-II
Neutronenstreuung ; Neutronenstreuung; JCNS-1
Langmuir, 30 (2014) 6, S. 1500-1505
Washington, DC ACS Publ. 2014
10.1021/la404354w
Journal Article
JCNS
Soft Matter Composites
Please use the identifier: http://dx.doi.org/10.1021/la404354w in citations.
We show for the first time the effect of telechelic polymers asadditives in bicontinuous microemulsions. We combined macroscopicobservations of the phase behavior with microscopic measurements of thestructure by small-angle neutron scattering (SANS) to recover the two elasticmoduli, κ and κ̅, namely the bending rigidity and saddle-splay modulus. Onthe basis of these results, we could classify the effect of telechelic polymersalong with confinement, expressed as the ratio of the polymer end-to-enddistance Ree and the oil−water domain size d. Their unique property to anchorat two points in the membrane (bridging) acts like a switch from antiboosterto booster of the surfactant efficiency (between low and ultralowconfinement). In the region of medium confinement, all telechelic polymersare in the bridging configuration and we have a maximum of the boostingeffect, while at high confinement, the reversed behavior is found whereanchoring and/or bridging do not play any role anymore.