A versatile method for the preparation of end-functional polymers onto SiO2 nanoparticles by a combination of surface-initiated ATRP and Huisgen [3+2] cycloaddition

作者：Chen J C^*; Luo W Q; Wang H D; Xiang J M; Jin H F; Chen F; Cai Z W

来源：Applied Surface Science, 2010, 256(8): 2490-2495.

DOI：10.1016/j.apsusc.2009.10.093

• Surface modification
• Atom-transfer radical polymerization (ATRP)
• Cu-catalyzed Huisgen [3+2] cycloaddition
• Chain-end functionalization

A versatile method was developed for the chain-end functionalization of the grafted polymer chains for surface modi. cation of nanoparticles with functionalized groups through a combination of surface-initiated atom-transfer radical polymerization (ATRP) and Huisgen [3 + 2] cycloaddition. First, the surface of SiO2 nanoparticles was modified with poly(methyl methacrylate) (PMMA) brushes via the "grafting from'' approach. The terminal bromides of PMMA-grafted SiO2 nanoparticles were then transformed into an azide function by nucleophilic substitution. These azido-terminated PMMA brushes on the nanoparticle surface were reacted with alkyne-terminated functional end group via Huisgen [3 + 2] cycloaddition. FTIR and H-1 NMR spectra indicated quantitative transformation of the chain ends of PMMA brushes onto SiO2 nanoparticles into the desired functional group. And, the dispersibility of the end-functional polymer-grafted SiO2 nanoparticles was investigated with a transmission electron microscope (TEM).

• 出版日期2010-2-1
• 单位安康学院