硅基季铵盐改性纳米SiO2稳定的Pickering乳液性能研究

doi:10.3969/j.issn.1001-1803.2020.03.008

Abstract

Abstract:

Amphiphilic SiO₂-C18QAS could be obtained by modifying hydrophilic SiO₂ nanoparticles with dimethyloctadecyl [3-（trimethoxysilyl）propyl] ammonium chloride （C18QAS）. Pickering emulsions could be facilely stabilized for various oil-water two-phase systems by SiO₂-C18QAS due to its good interfacial activity. With the increase of the mass fraction of SiO₂-C18QAS, the diameter of emulsion droplets would decline first until reaching a constant value. With the increase of the functionalization degree of SiO₂-C18QAS, however, the droplet size of emulsions would decrease before reaching a minimum at the usage of 0.3 mmol C18QAS and then increase gradually. Moreover, phase inversion could be triggered by changing the acid-base property of water phase or the volume ratio between oil and water. After standing for 1 month, the emulsion was observed without any significant change, exhibiting excellent stability. SiO₂-C18QAS was a promising candidate for further applications.

Key words: silicon-based quaternary ammonium salt, Pickering emulsion, performance, phase inversion, stability

CLC Number:

TB383

Wei XUE,Jiang-hong WU,Zhi-ping DU. Performance of Pickering emulsions stabilized by SiO₂ nanoparticles modified with silicon-based quaternary ammonium salts[J].China Surfactant Detergent & Cosmetics, 2020, 50(3): 182-187.

Figures/Tables 10

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References 14

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Performance of Pickering emulsions stabilized by SiO₂ nanoparticles modified with silicon-based quaternary ammonium salts

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Performance of Pickering emulsions stabilized by SiO2 nanoparticles modified with silicon-based quaternary ammonium salts

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Performance of Pickering emulsions stabilized by SiO₂ nanoparticles modified with silicon-based quaternary ammonium salts