Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 53, Issue 19, Pages 4905-4909Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201402254
Keywords
compression isotherms; electrostatic interactions; interfaces; pH-sensitive microgels; Pickering emulsions
Categories
Funding
- SNSF [PZ00P2_142532/1, PP00P2_144646/1]
- Deutsche Forschungsgemeinschaft [Sonderforschungsbereich SFB 985]
Ask authors/readers for more resources
pH-responsive microgels are unique stabilizers for stimuli-sensitive emulsions that can be broken on demand by changing the pHvalue. However, recent experiments have indicated that electrostatic interactions play a different role to that in conventional Pickering emulsions. The influence of charges on the interactions between microgels at the oil-water interface is now described. Compression isotherms of microgels with different charge density and architecture were determined in a Langmuir trough, and counter-intuitive results were obtained: Charged microgels can be compressed more easily than uncharged microgels. The compressibility of microgels is thus not determined by direct Coulomb repulsion. Instead, the different swelling of the microgels in the charged and the uncharged states is proposed to be the key parameter.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available