Modification of magnetite nanoparticles via surface-initiated atom transfer radical polymerization (ATRP)

作者：Zhou Yang^*; Wang Shixing; Ding Bingjun; Yang Zhimao

来源：Chemical Engineering Journal, 2008, 138(1-3): 578-585.

DOI：10.1016/j.cej.2007.07.030

• magnetite nanoparticle
• surface modification
• silanization reaction
• atom transfer radical polymerization
• graft polymerization

Modification of magnetite nanoparticles via surface-initiated atom transfer radical polymerization (ATRP) was carried out. The magnetic nanoparticles with an initiator group for copper-mediated atom transfer radical polymerization, 3-aminopropyltriethoxysilane chemically bound on their surfaces were prepared by the self-assembled monolayer. Well defined diblock copolymer brushes consisting of poly(ethylene glycol) methacrylate and methyl methacrylate blocks were obtained by using the initial homopolymer brushes as the macroinitiators for the ATRP of the second monomer. The chemical composition of the functionalized magnetite nanoparticles was characterized by X-ray photoelectron spectroscopy, FT-IR spectroscopy and thermogravimetric analysis. The difference of proteins non-specifically adsorbed onto the surface of uncoated and functionalized magnetite nanoparticles was evaluated. The ability of the functionalized magnetite nanoparticles to resist the proteins non-specific adsorption was higher than that of uncoated nanoparticles.

• 出版日期2008-5-1
• 单位国家纳米科学中心; 西安交通大学