pH‐ and Redox‐Responsive Pickering Emulsions Based on Cellulose Nanocrystal Surfactants

Yang, Yang; Sun, Huilou; Wang, Meng; Li, Mingwei; Zhang, Zhen; Russell, Thomas P.; Shi, Shaowei

doi:10.1002/ange.202218440

Title: pH‐ and Redox‐Responsive Pickering Emulsions Based on Cellulose Nanocrystal Surfactants

Journal Article · 06 March 2023 · Angewandte Chemie

DOI: https://doi.org/10.1002/ange.202218440 · OSTI ID:1960348

Yang, Yang ^[1]; Sun, Huilou ^[1]; Wang, Meng ^[2]; Li, Mingwei ^[1]; Zhang, Zhen ^[3]; Russell, Thomas P. ^[4];

^[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
Beijing Xinfeng Aerospace Equipment Co., Ltd. Beijing 100854 China
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
Department of Polymer Science and Engineering University of Massachusetts Amherst MA-01003 USA, Materials Sciences Division Lawrence Berkeley National Laboratory 1 Cyclotron Road Berkeley CA-94720 USA

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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Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-05-CH11231

OSTI ID:: 1960348

Journal Information:: Angewandte Chemie, Journal Name: Angewandte Chemie Vol. 135 Journal Issue: 16; ISSN 0044-8249

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: Germany

Language:: English

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