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

Autor:	Chen Kui, Han Jinling, Bin Wu, Liang Shengji
Rok vydání:	2019
Předmět:	Materials science Carbonization Solvothermal synthesis Dispersity chemistry.chemical_element engineering.material Dispersant chemistry Coating Magnetic core Chemical engineering Dynamic light scattering engineering Carbon
Zdroj:	IOP Conference Series: Materials Science and Engineering. 562:012022
ISSN:	1757-899X 1757-8981
DOI:	10.1088/1757-899x/562/1/012022
Popis:	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.
Databáze:	OpenAIRE
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