Synthesis of Fe3O4 polymer magnetic composite nanoparticles with carboxylate groups in self-emulsification

POLY 184

Chunhua Zhou, jdzch@yahoo.com.cn1, Wei Liu1, guangqiang Xu1, and Xiang Z. Kong2. (1) College of Chemistry and Chemical Engineering, University of Jinan, 106 Jiwei Road, Jinan, 250022, China, (2) College of Chemistry & Chemical Engineering, University of Jinan, 106 Jiwei Road, Jinan, 250022, China
Magnetic polymer microspheres are a novel functional material. In this paper, Fe3O4/P(sodium undecelate-styrene-butylacrylate) magnetic composite nanoparticles were in situ prepared in self-emulsification. The monomer styrene (St) and butylacrylate (BA) were copolymerized with sodium undecelate (NaU) on the surface of Fe3O4 magnetic nanoparticles modified by reactive surfactant NaU to form Fe3O4/P(NaU-St-BA) magnetic nanoparticles. The results of TEM, DLS and magnetic loop showed that it was uniform, dispersible and possessed of core-shell structure and superparamagnetic behavior. FTIR indicated there was abundant functional group-COONa on the surfaces of the magnetic polymer nanoparticles. In addition the particle size decreased and Ms of Fe3O4/P(NaU-St-BA) increased with increase in amount of Fe3O4 magnetic colloidal particles. (e.g.: the amount of Fe3O4 is 30g/l, the Fe3O4/P(NaU-St-BA) nanoparticle has a relatively uniform diameter 60nm, Ms =28 emu/g).
 

General Papers: Functional Materials
6:00 PM-8:00 PM, Sunday, August 19, 2007 BCEC -- Exhibit Hall - B2, Poster

Sci-Mix
8:00 PM-10:00 PM, Monday, August 20, 2007 BCEC -- Exhibit Hall - B2, Sci-Mix

Division of Polymer Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007