Parametric characterizations in superparamagnetic latex

Bulletin of materials science

Seda Beyaz¹  Hakan Kockar²  Taner Tanrisever¹ 

[1] Chemistry Department, Science and Literature Faculty, Balikesir University, 10145 Balikesir, Turkey$$Chemistry Department, Science and Literature Faculty, Balikesir University, 10145 Balikesir, TurkeyChemistry Department, Science and Literature Faculty, Balikesir University, 10145 Balikesir, Turkey$$;Physics Department, Science and Literature Faculty, Balikesir University, 10145 Balikesir, Turkey$$Physics Department, Science and Literature Faculty, Balikesir University, 10145 Balikesir, TurkeyPhysics Department, Science and Literature Faculty, Balikesir University, 10145 Balikesir, Turkey$$

关键词: Superparamagnetic latex;    magnetite nanoparticles;    emulsifier-free;    emulsion polymerization.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

The effect of synthesis parameters on the production of superparamagnetic latex, which are magnetite nanoparticles covered with a poly(methyl methacrylate) layer, were studied. The synthesis method was based on the developed route of emulsifier-free emulsion polymerization. Under this study, effects of the monomer and initiator concentrations, the amount of magnetic sol, the stirring rate and the adding rate of the magnetic sol on the properties of synthesized latexes were investigated. The characterizations were performed by a high resolution transmission electron microscopy, a dynamic light scattering, a vibrating sample magnetometer and a gel permeation chromatography. The results showed that the monomer concentration was found to be the most effective parameter on latex stability. As the initiator amount and the stirring rate increased, saturation magnetization and average molecular weight decreased due to the reactions occurring between surfaces of magnetite nanoparticles and initiator fragments. On increasing amount of magnetic sol, the saturation magnetization and polymer molecular weight increased but the size of nanospheres was unchanged because of the ions in magnetic sol. It was seen that the desired size and magnetic properties of the latex could be obtained since the parameters were found to have substantial impact on their properties.

【 授权许可】

Unknown