Open AccessPreparation and Characterization of Monodisperse Magnetic Carbon Microspheres with Controllable Shell Thickness and High Water Solubility
Author(s) -
Shengji Liang,
Kui Chen,
JinHee Han,
Bin Wu
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/562/1/012022
Subject(s) - materials science , carbonization , dispersity , dispersant , coating , chemical engineering , carbon fibers , resorcinol , core (optical fiber) , dynamic light scattering , composite material , nanotechnology , polymer chemistry , scanning electron microscope , nanoparticle , dispersion (optics) , organic chemistry , chemistry , composite number , optics , physics , engineering
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 N 2 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.