期刊
LANGMUIR
卷 36, 期 48, 页码 14589-14596出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.0c02350
关键词
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资金
- National Natural Science Foundation of China [21872064, 21573096, 21473080]
- Postgraduate Research and Practice Innovation Program of Jiangsu Province [KYCX20_1940]
A redox-responsive oil-in-dispersion emulsion was developed by using a cationic ferrocene surfactant (FcCOC(10)N) and Al2O3 nanoparticles, in which the required concentrations of FcCOC(10)N and Al2O3 nanoparticles are as low as 0.001 mM (approximate to 0.005 cmc) and 0.006 wt %, respectively. Rapid demulsification can be successfully achieved through a redox trigger, resulting from the transition of FcCOC(10)N from a normal cationic surfactant form into a strongly hydrophilic Bola type form (Fc(+)COC(10)N). Moreover, Fc(+)COC(10)N together with the particles almost resides in the aqueous phase and can be recovered after the reduction reaction. Not only the amount of surfactant and nanoparticles are significantly reduced but also the emulsifier (surfactant and alumina) can be recycled and reused from the aqueous phase, which is a sustainable and economical strategy for various applications.
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