pH and Magnetism Dual-Responsive Pickering Emulsion Stabilized by Dynamic Covalent Fe3O4 Nanoparticles

Herein, we describe pH and magnetism dual-responsive liquid paraffin-in-water Pickering emulsion stabilized by dynamic covalent Fe3O4 (DC-Fe3O4) nanoparticles. On one hand, the Pickerinfigureg emulsions are sensitive to pH variations, and efficient demulsification can be achieved by regulating the pH between 10 and 2 within 30 min. The dynamic imine bond in DC-Fe3O4 can be reversibly formed and decomposed, resulting in a pH-controlled amphiphilicity. The Pickering emulsion can be reversibly switched between stable and unstable states by pH at least three times. On the other hand, the magnetic Fe3O4 core of DC-Fe3O4 allowed rapid separation of the oil droplets from Pickering emulsions under an external magnetic field within 40 s, which was a good extraction system for purifying the aqueous solution contaminated by rhodamine B. The dual responsiveness enables Pickering emulsions to have better control of their stability and to be applied more broadly.

[1]  Xiaoshan Zheng,et al.  Robust pH-Switchable Pickering Emulsions Stabilized Solely by Organic Rosin-based Particles with Adjustable Wettability , 2022, Journal of Molecular Liquids.

[2]  Ji-jiang Ge,et al.  pH- and thermo-responsive Pickering emulsion stabilized by silica nanoparticles and conventional nonionic copolymer surfactants. , 2022, Journal of colloid and interface science.

[3]  M. Basavaraj,et al.  Macroporous Ceramic Monolith from Nanoparticle-Polyelectrolyte-Stabilized Pickering Emulsions. , 2021, The journal of physical chemistry. B.

[4]  Chunhua Wang,et al.  pH-Responsive Pickering High Internal Phase Emulsions Stabilized by Waterborne Polyurethane , 2021, Journal of Colloid and Interface Science.

[5]  Zhenggang Cui,et al.  pH-Responsive Behavior of Pickering Emulsions Stabilized by a Selenium-Containing Surfactant and Alumina Nanoparticles. , 2021, Langmuir : the ACS journal of surfaces and colloids.

[6]  Weiguang Yang,et al.  Dual-responsive pickering emulsions triggered by CO2 and magnetism , 2021 .

[7]  Jianxin He,et al.  Dynamic Covalent Nanoparticles for Acid-Responsive Nonaqueous Pickering Emulsions. , 2021, Langmuir : the ACS journal of surfaces and colloids.

[8]  Zhengdong Cheng,et al.  Amphiphilicity-adaptable graphene quantum dots to stabilize pH-responsive pickering emulsions at a very low concentration. , 2021, Journal of colloid and interface science.

[9]  Hongbin Yang,et al.  Fabrication of a pH-responsive emulsifier for heavy oil recovery based on dynamic imine bond , 2021 .

[10]  I. Gates,et al.  Dual Stimuli-Responsive Pickering Emulsions from Novel Magnetic Hydroxyapatite Nanoparticles and Their Characterization Using a Microfluidic Platform. , 2021, Langmuir : the ACS journal of surfaces and colloids.

[11]  Weimeng Si,et al.  Dual-Responsive Pickering Emulsion Stabilized by Fe3O4 Nanoparticles Hydrophobized in Situ with an Electrochemical Active Molecule , 2021 .

[12]  Weiguang Yang,et al.  Pickering emulsions stabilized by surfactant particles with smart responses to pH and metal-ligands , 2020 .

[13]  Anlian Zhu,et al.  Light-switched reversible emulsification and demulsification of oil-in-water Pickering emulsions. , 2020, Angewandte Chemie.

[14]  E. Dickinson,et al.  Sustainable food-grade Pickering emulsions stabilized by plant-based particles , 2020, Current Opinion in Colloid & Interface Science.

[15]  Jiaming Geng,et al.  pH-Responsive crude oil-in-water Pickering emulsion stabilized by polyacrylamide nanogels , 2019 .

[16]  Zhenghe Xu,et al.  Temperature and CO2 Dual-responsive Pickering Emulsions using Jeffamine M2005-Modified Cellulose Nanocrystals. , 2019, Langmuir : the ACS journal of surfaces and colloids.

[17]  Lingyu Zhu,et al.  Pickering Interfacial Catalysts with CO2 and Magnetic Dual Response for Fast Recovering in Biphasic Reaction. , 2019, ACS applied materials & interfaces.

[18]  Zhenghe Xu,et al.  Dynamic Covalent Silica Nanoparticles for pH-Switchable Pickering Emulsions. , 2018, Langmuir : the ACS journal of surfaces and colloids.

[19]  M. Basavaraj,et al.  Doubly pH Responsive Emulsions by Exploiting Aggregation of Oppositely Charged Nanoparticles and Polyelectrolytes. , 2018, Langmuir : the ACS journal of surfaces and colloids.

[20]  Yongming Zhang,et al.  CO2 and Redox Dual Responsive Pickering Emulsion. , 2017, Langmuir : the ACS journal of surfaces and colloids.

[21]  Zhenggang Cui,et al.  pH-Responsive Pickering Emulsions Stabilized by Silica Nanoparticles in Combination with a Conventional Zwitterionic Surfactant. , 2017, Langmuir : the ACS journal of surfaces and colloids.

[22]  Yu Fang,et al.  Smart magnetic ionic liquid-based Pickering emulsions stabilized by amphiphilic Fe3O4 nanoparticles: Highly efficient extraction systems for water purification. , 2017, Journal of colloid and interface science.

[23]  B. Binks,et al.  Pickering Emulsions Responsive to CO2/N2 and Light Dual Stimuli at Ambient Temperature. , 2016, Langmuir : the ACS journal of surfaces and colloids.

[24]  Xiao Chen,et al.  pH-responsive vesicles from supra-amphiphiles based on dynamic imine bond , 2015 .

[25]  Xiaofeng Wang,et al.  Developing recyclable pH-responsive magnetic nanoparticles for oil–water separation , 2015 .

[26]  T. Meng,et al.  Switchable Pickering Emulsions Stabilized by Awakened TiO2 Nanoparticle Emulsifiers Using UV/Dark Actuation. , 2015, ACS applied materials & interfaces.

[27]  K. Tam,et al.  Stimuli-responsive Pickering emulsions: recent advances and potential applications. , 2015, Soft matter.

[28]  Zhenggang Cui,et al.  Switchable Pickering emulsions stabilized by silica nanoparticles hydrophobized in situ with a conventional cationic surfactant. , 2015, Langmuir : the ACS journal of surfaces and colloids.

[29]  Junbai Li,et al.  Molecular assembly of Schiff Base interactions: construction and application. , 2015, Chemical reviews.

[30]  S. Armes,et al.  Preparation of double emulsions using hybrid polymer/silica particles: new pickering emulsifiers with adjustable surface wettability. , 2014, ACS applied materials & interfaces.

[31]  Shiping Zhu,et al.  Highly CO2/N2-switchable zwitterionic surfactant for pickering emulsions at ambient temperature. , 2014, Langmuir : the ACS journal of surfaces and colloids.

[32]  Boxin Zhao,et al.  Dual responsive pickering emulsion stabilized by poly[2-(dimethylamino)ethyl methacrylate] grafted cellulose nanocrystals. , 2014, Biomacromolecules.

[33]  Xiaogang Qu,et al.  Light controlled reversible inversion of nanophosphor-stabilized Pickering emulsions for biphasic enantioselective biocatalysis. , 2014, Journal of the American Chemical Society.

[34]  Xi Zhang,et al.  Asymmetric and symmetric bolaform supra-amphiphiles: formation of imine bond influenced by aggregation. , 2014, Langmuir : the ACS journal of surfaces and colloids.

[35]  S. Armes,et al.  Novel Pickering emulsifiers based on pH-responsive poly(2-(diethylamino)ethyl methacrylate) latexes. , 2012, Langmuir : the ACS journal of surfaces and colloids.

[36]  Xiaoya Liu,et al.  Dual-responsive poly(styrene-alt-maleic acid)-graft-poly(N-isopropyl acrylamide) micelles as switchable emulsifiers. , 2012, Journal of colloid and interface science.

[37]  J. Boekhoven,et al.  Responsive vesicles from dynamic covalent surfactants. , 2011, Angewandte Chemie.

[38]  Yi Liu,et al.  Magnetic Pickering emulsions stabilized by Fe3O4 nanoparticles. , 2011, Langmuir : the ACS journal of surfaces and colloids.

[39]  D. Grigoriev,et al.  Nanoparticle modification by weak polyelectrolytes for pH-sensitive pickering emulsions. , 2011, Langmuir : the ACS journal of surfaces and colloids.

[40]  D. Grigoriev,et al.  Encapsulation of Amphoteric Substances in a pH-Sensitive Pickering Emulsion , 2010 .

[41]  Jian Li,et al.  Doubly pH-responsive pickering emulsion. , 2008, Langmuir : the ACS journal of surfaces and colloids.

[42]  W. Richtering,et al.  Magnetic, Thermosensitive Microgels as Stimuli‐Responsive Emulsifiers Allowing for Remote Control of Separability and Stability of Oil in Water‐Emulsions , 2007 .

[43]  S. Melle,et al.  Pickering emulsions with controllable stability. , 2005, Langmuir : the ACS journal of surfaces and colloids.

[44]  Bernard P. Binks,et al.  Emulsions stabilised solely by colloidal particles , 2003 .

[45]  D. Mcclements,et al.  Development of pH-responsive emulsions stabilized by whey protein fibrils , 2022 .