Affiliation:
1. Beijing Advanced Innovation Center for Soft Matter Science and Engineering & Beijing Engineering Research Center for the Synthesis and Applications of Waterborne Polymers Beijing University of Chemical Technology Beijing 100029 China
2. Beijing Xinfeng Aerospace Equipment Co., Ltd. Beijing 100854 China
3. SCNU-TUE Joint Lab of Device Integrated Responsive Materials (DIRM) South China Academy of Advanced Optoelectronics South China Normal University Guangzhou 510006 P. R. China
4. Department of Polymer Science and Engineering University of Massachusetts Amherst MA-01003 USA
5. Materials Sciences Division Lawrence Berkeley National Laboratory 1 Cyclotron Road Berkeley CA-94720 USA
Abstract
AbstractNanoparticle surfactants (NPSs), formed by using dynamic interactions between nanoparticles and complementary ligands at the liquid‐liquid interface, have emerged as “smart emulsifiers” with attributes of high emulsification efficiency, long‐term stability, and on‐demand emulsification/demulsification capabilities. However, only pH‐responsiveness can be adopted for the assembly of reported NPSs formed by electrostatic interactions. Here, we propose an alternative design strategy, by taking advantage of the ferrocenium (Fc+) sulfate ion pair, to develop a new type of cellulose nanocrystal (CNC) surfactant. The Fc+ groups are sensitive to pH, redox reagents and voltage, imparting the CNC surfactants and derived Pickering emulsions with multi‐stimuli‐responsiveness, and showing promising applications in controllable delivery, release, and biphasic biocatalysis.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Beijing Municipality
U.S. Department of Energy