Adhesion-Shielding based synthesis of interfacially active magnetic Janus nanoparticles

Fan Yang; Xiao He; Wen Tan; Gang Liu; Tingting Yi; Qingye Lu; Xiaoting Wei; Hanjie Xie; Qiurong Long; GuiChao Wang; Chuanfei Guo; Erica Pensini; Zhouguang Lu; Qingxia Liu; Zhenghe Xu

doi:10.1016/j.jcis.2021.08.202

Adhesion-Shielding based synthesis of interfacially active magnetic Janus nanoparticles

J Colloid Interface Sci. 2022 Feb;607(Pt 2):1741-1753. doi: 10.1016/j.jcis.2021.08.202. Epub 2021 Sep 1.

Authors

Fan Yang¹, Xiao He², Wen Tan³, Gang Liu³, Tingting Yi³, Qingye Lu⁴, Xiaoting Wei³, Hanjie Xie³, Qiurong Long³, GuiChao Wang³, Chuanfei Guo³, Erica Pensini⁵, Zhouguang Lu³, Qingxia Liu⁶, Zhenghe Xu⁷

Affiliations

¹ College of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, PR China; Shenzhen Key Laboratory of Interfacial Science and Engineering of Materials, Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, PR China.
² Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada; Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive, NW, Calgary, Alberta T2N 1N4 Canada.
³ Shenzhen Key Laboratory of Interfacial Science and Engineering of Materials, Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, PR China.
⁴ Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive, NW, Calgary, Alberta T2N 1N4 Canada.
⁵ Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada.
⁶ College of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, PR China; Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada. Electronic address: Liuqingxia@sztu.edu.cn.
⁷ Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada; Shenzhen Key Laboratory of Interfacial Science and Engineering of Materials, Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, PR China. Electronic address: xuzh@sustech.edu.cn.

PMID: 34598031
DOI: 10.1016/j.jcis.2021.08.202

Abstract

Hypothesis: A unique adhesion-shielding (AS)-based method could be used to manufacture magnetic Janus nanoparticles (IM-JNPs) of promising interfacial activities, asymmetric surface wettability, and great performance on deoiling from oily wastewater under the external magnetic field.

Experiments: The IM-JNPs were characterized using scanning electron microscope (SEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and Fourier-transform infrared spectroscopy (FTIR). The interfacial properties of IM-JNPs were investigated by the measurements of interfacial pressure-area isotherms (π-A), oil-water interfacial tension, and the related crumpling ratio. The Langmuir-Blodgett (L-B) technique was used to determine the asymmetric surface wettability of the IM-JNPs. The performance and recyclability of IM-JNPs for treating oily wastewater were also investigated.

Findings: Using the proposed AS-based method, 17.9 g IM-JNPs were synthesized at a time and exhibited excellent interfacial properties, as indicated by decreasing oil-water interfacial tension from 38 to 27 mN/m. The crumpling behavior of the oil droplet further demonstrated the irreversible deposition of IM-JNPs at the oil droplet surfaces. The L-B technique and water contact angle measurement confirmed the asymmetric surface wettability of the IM-JNPs. The IM-JNPs were applied to successful removal of > 90% emulsified oil droplets from the household-produced oily wastewater under the external magnetic field while realizing facile recyclability and regeneration.

Keywords: Adhesion-shielding; Magnetic Janus nanoparticle; Oily wastewater treatment; Scalable synthesis; Starch powder.

MeSH terms

Magnetic Phenomena
Multifunctional Nanoparticles*
Oils
Surface Tension
Wettability

Substances

Oils