Fe3O4磁性纳米颗粒的RAFT试剂化研究

兰州理工大学学报 ›› 2020, Vol. 46 ›› Issue (5): 27-33.

Fe₃O₄磁性纳米颗粒的RAFT试剂化研究

陈振斌^1,2, 周永山^1,2, 张霞云^1,2

1.兰州理工大学材料科学与工程学院, 甘肃兰州 730050;
2.兰州理工大学有色金属先进加工与再利用国家重点实验室, 甘肃兰州 730050

收稿日期:2020-03-03 出版日期:2020-10-28 发布日期:2020-11-06
作者简介:陈振斌(1969-),男,甘肃庄浪人,教授,博导.
基金资助:
国家自然科学基金(51563015)

Functionalization of Fe₃O₄ magnetic nanoparticles using RAFT reagent

CHEN Zhen-bin^1,2, ZHOU Yong-shan^1,2, ZHANG Xia-yun^1,2

1. College of Materials Science and Engineering,Lanzhou Univ. of Tech, Lanzhou 730050, China;
2. State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou Univ. of Tech., Lanzhou 730050, China

Received:2020-03-03 Online:2020-10-28 Published:2020-11-06

摘要/Abstract

摘要： 通过反相微乳液法制备四氧化三铁纳米颗粒(Fe₃O₄ NPs),并用硅烷偶联剂KH570对其改性,以期在Fe₃O₄ NPs表面引入C==C双键,再利用引入的C==C双键与三硫代十二烷酸-2-氰基异丙酯(RAFT试剂)进行反应,得到RAFT试剂化的Fe₃O₄ NPs(Fe₃O₄-g-KH570-RAFT NPs),并对不同阶段的Fe₃O₄ NPs产物的结构与形貌等进行表征.研究中以RAFT试剂接枝率(Gr_RAFT)为指标,考察了反应时间等工艺条件对Gr_RAFT的影响.结果表明:制备的Fe₃O₄-g-KH570-RAFT NPs的平均粒径为10.4 nm,当反应时间为14 h,反应温度为65 ℃,n_KH570/n_RAFT为1/2时,接枝率Gr_RAFT最高达到79.34%.

关键词: Fe₃O₄ NPs, RAFT试剂, 表面修饰, 接枝

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

中图分类号:

TB34

陈振斌, 周永山, 张霞云. Fe₃O₄磁性纳米颗粒的RAFT试剂化研究[J]. 兰州理工大学学报, 2020, 46(5): 27-33.

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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Fe₃O₄磁性纳米颗粒的RAFT试剂化研究

Functionalization of Fe₃O₄ magnetic nanoparticles using RAFT reagent

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