CO2 and Redox Dual Responsive Pickering Emulsion

Langmuir : the ACS Journal of Surfaces and Colloids
Yongmin ZhangYun Fang

Abstract

Herein, we described for the first time a CO2 and redox dual responsive paraffin oil-in-water Pickering emulsion stabilized by the modified silica nanoparticles with Se-containing tertiary amine, SeTA, in which the tertiary amine serves as a CO2-sensitive group, and the Se atom serves as a redox-sensitive center. The Pickering emulsion can be reversibly switched between stable and unstable states by bubbling CO2 and N2 in the reduced state, or with the addition of H2O2 and Na2SO3 in the absence of CO2, because of the adsorption and desorption of SeTA on the silica surface. The former is mainly attributed to a CO2-controllable electrostatic attraction, resulting from the transition of molecules between cationic and nonionic states; whereas, the latter is ascribed to a redox-tunable hydrogen bonding, originating from the transition of molecules between selenide and selenoxide. However, in the presence of CO2, redox can only induce a change in the droplet size, not demulsification. These interesting and unique multiresponsive behaviors endow the Pickering emulsion with a capacity for intelligent control of emulsification and demulsification, as well as the droplet size, which may be an asset for a myriad of technological applicati...Continue Reading

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Citations

May 19, 2020·ChemSusChem·Nasim Ghavidel, Pedram Fatehi
Jan 30, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Yue ZhouYongmin Zhang
Jun 3, 2021·Nanomaterials·Gaihuan RenDejun Sun
Nov 24, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Haojie ZhangWenshui Xia
Nov 18, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Xiaojiang LiHongsheng Lu
Sep 25, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Gaihuan RenDejun Sun
Feb 27, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Maodong XuBernard P Binks
Feb 28, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Lisa Tran, Martin F Haase
Oct 11, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Yongmin ZhangXuefeng Liu
Mar 19, 2020·Journal of Agricultural and Food Chemistry·Xiaofei RenYongmin Zhang
Sep 27, 2018·Journal of Agricultural and Food Chemistry·Xinyan YanXiaoping Rao
Apr 14, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·An ChenJian-Hong Xu
Aug 28, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Ting ZengYong Gao
Jan 21, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Peiyao ZhuZhiyu Huang
Aug 28, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Shijie YuZhenggang Cui
Sep 28, 2021·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Shahinur ActerRico F Tabor

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