Investigation on Formation Mechanism of Magnetic Nanoparticles-coated on Polystyrene Microspheres in Aqueous Solution of Anhydrous Ethylenediamine and Hexamethylene Tetramine
Mingjuan Han1, Yanyan Wei1, Mingyue Chen1, Ying Li1, Jikui Wang1*, Lihong Dong2
Affiliation
- 1College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 210009, PR China
- 2Department of Chemistry, Tonghua Normal College, Tonghua 134002, PR China
Corresponding Author
Jikui Wang, College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 210009, PR China, Tel: +13-951-945-201; E-mail: njwjk@163.com
Citation
Jikui Wang., et al. Investigation on Formation Mechanism of Magnetic Nanoparticles-Coated on Polystyrene Microspheres in Aqueous Solution of Anhydrous Ethylenediamine and Hexamethylenetetramine. (2017) J Nanotechnol Material Sci 4(1): 27- 31.
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© 2017 Jikui Wang. This is an Open access article distributed under the terms of Creative
Commons Attribution 4.0 International License.
Keywords
Abstract
The monodispersed polystyrene (PS) microspheres were modified by concentrated sulfuric acid to obtain PS microspheres with negative charges, and then polystyrene/magnetic composite microspheres were fabricated by a simple and novel method in aqueous solution of anhydrous Ethylene diamine (EDA) and Hexamethylenetetramine (HMTA). Through serials of contrast experiments (based on different precursor ratios) and characteristic investigations of target samples, we have discovered the functions of EDA and HMTA, respectively. EDA not only acted as a weak base providing OH- ions, but also acted as a chelating combining with Fe2+ ions, which could control the concentration of Fe2+ ions, and resulted in the pure Fe3O4 nanoparticle coated on the surface of PS microspheres. Otherwise, the typical XRD peaks of FeOOH and Fe3O4 appeared, simultaneously, if HMTA played an action in the formation magnetic nanoparticles-coated PS microspheres. It indicated that HMTA could provide OH- ions and make Fe2+ to become FeOOH and Fe3O4, simultaneously, which could be confirmed the reaction mechanism suggested by us. Finally, the corresponding possible reaction mechanisms of EDA and HMTA for fabricating magnetic composite microspheres have been suggested in detail by combining SEM, XRD, FTIR analysis together.
