Preparation and Characterization of Monodisperse Magnetic Carbon Microspheres with Controllable Shell Thickness and High Water Solubility

7th Annual International Conference on Materials Science and Engineering

Liang, Shengji^1 ; Chen, Kui^1 ; Han, Jinling^1 ; Wu, Bin^1

School of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, China^1

关键词: 4-Styrenesulfonic acids;    Controllable shell thickness;    Core shell structure;    Dispersibilities;    Dispersing agent;    Magnetic carbons;    Resorcinol formaldehyde resin;    Solvothermal synthesis;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/562/1/012022/pdf
DOI  :  10.1088/1757-899X/562/1/012022

来源: IOP

【 摘 要 】

Core-shell magnetic carbon microspheres with good monodispersity and uniformity were obtained. Good monodispersity was achieved by adding a dispersant in the solvothermal synthesis of magnetic core, as the criterion for good dispersibility was set up through dynamic light scattering (DLS). The excellent dispersing agent (Poly (4-styrenesulfonic acid-co-maleic acid, SS: MA = 3:1) sodium salt, PSSMA) has been selected among three dispersants, which greatly improves the dispersibility of the magnetic core in the coating environment, thereby obtaining a core-shell structure with uniform coating and monodispersity. Carbon shell was gained by deposit coating process of resorcinol formaldehyde resin (RF) onto the magnetic core and then subsequent carbonization under N2 atmosphere. At the same time, the carbon shell thickness can be adjusted up to 70 nm by adjusting the RF shell thickness which is tunable ranging from 30 to120 nm.