TY  - JOUR
AU  - Maccarrone, Simona
AU  - Allgaier, J.
AU  - Frielinghaus, Henrich
AU  - Richter, Dieter
TI  - Anchoring vs Bridging: New Findings on Polymer Additives in Bicontinuous Microemulsions
JO  - Langmuir
VL  - 30
IS  - 6
SN  - 1520-5827
CY  - Washington, DC
PB  - ACS Publ.
M1  - FZJ-2014-01273
SP  - 1500-1505
PY  - 2014
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000331774400003
DO  - DOI:10.1021/la404354w
UR  - https://juser.fz-juelich.de/record/151285
ER  -