Functionalization of Fe3O4 magnetic nanoparticles using RAFT reagent

Abstract

Abstract: Ferric oxide nanoparticles (Fe₃O₄ NPs) were prepared in this study by reverse microemulsion method, and modified by silane coupling agent KH570 so as to introduce cellulc double bond on the surface of Fe₃O₄ NPs, and then react with 2-cyanopropan-2-propanyl dodecyl trithiocarbonate to obtain RAFT reacted Fe₃O₄ NPs (Fe₃O₄-g-KH570-RAFT NPs)). The structure and morphology of Fe₃O₄ NPs products at different stages were also characterized. Effects of reaction time and other process conditions on Gr_RAFT were investigated quantitatively in the study by taking the grafting rate of RAFT reagent (Gr_RAFT) as an index. The results show that the average particle size of the prepared Fe₃O₄-g-KH570-RAFT NPs is about 10.4 nm. When the reaction time takes 14 h, the reaction temperature is 65 ℃, and n_KH570/n_RAFT becomes 1/2, the highest grafting rate Gr_RAFT may reach up to 79.34%.

Key words: Fe₃O₄ NPs, RAFT agent, surface modification, grafting

CLC Number:

TB34

CHEN Zhen-bin, ZHOU Yong-shan, ZHANG Xia-yun. Functionalization of Fe₃O₄ magnetic nanoparticles using RAFT reagent[J]. Journal of Lanzhou University of Technology, 2020, 46(5): 27-33.

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Functionalization of Fe₃O₄ magnetic nanoparticles using RAFT reagent

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