Magnetic polymer nanocomposites synthesis

A.M.M.S. Medeiros, F. Machado, J.C. Rubim, Synthesis and characterization of a magnetic bio-nanocomposite based on magnetic nanoparticles modified by acrylated fatty acids derived from castor oil, European Polymer Journal 71 (2015) 152—163. 

Kirchberg S, Rudolph M, Ziegmann G, Peuker UA (2011) Nanocomposites based on technical polymers and sterically functionalized soft magnetic magnetite nanoparticles synthesis, processing and characterization. J Nanomater, Article ID 670531... 

Nowadays a promising way to control the bulk polymer properties, such as conductivity, processability, thermal, and mechanical stabihties, is through the organization of the polymeric chains on the nanometer scale [7-9]. The first approach used to achieve this goal was the synthesis of conducting polymers in cavities of porous hosts. Commonly named nanocomposites, these materials have two or more different components on the nanoscale, and can show catalytic, electronic, magnetic, and optical properties better than those of the individual phases. The basic reason for this synergism is still not fully understood, but it is considered that confinement and electrostatic interactions between the components play an important role. 

R.T. Araujo, G.R. Eeneira, T. Segura, F.G. Souza Jr., F. Machado, An experimental study on the synthesis of poly(vinyl pivalate)-based magnetic nanocomposites through suspension polymerization process, European Polymer Journal 68 (2015) 441-459. 

SCHEME 15.2 IVpes, synthesis, and applications of magnetic nanocomposites. (Data from Kalia Susheel et al. Colloid Polym. Sci. 292 no. 9 (2014) 2025-2052.)... 

Synthesis of cobalt nanoparticles in a polystyrene/triphenylphosphine polymer matrix was reported by Leslie-Pelecky et al. [39] who showed that magnetic properties of the as-synthesized nanocomposites ranged from super-paramagnetic to ferromagnetic with coercivities on the order of 130 Oe. They found that annealing in vacuiun produced coercivities of up to 600 Oe and remanence ratios of up to 0.4. 

---