pH- and Redox-Responsive Pickering Emulsions Based on Cellulose Nanocrystal Surfactants |
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| Authors: | Yang Yang Huilou Sun Meng Wang Mingwei Li Prof Zhen Zhang Prof Thomas P Russell Prof Shaowei Shi |
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| Institution: | 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
These authors contributed equally to this work.;2. Beijing Xinfeng Aerospace Equipment Co., Ltd., Beijing, 100854 China;3. 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;4. 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;5. Department of Polymer Science and Engineering, University of Massachusetts, Amherst, MA-01003 USA |
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| Abstract: | Nanoparticle 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. |
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| Keywords: | Biocatalysis Interfacial Assembly Multi-Stimuli-Responsiveness Nanoparticle Surfactants Pickering Emulsions |
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