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学科主题: 高分子化学
题名: Synthesis of PAA-g-PNIPAM well-defined graft polymer by sequential RAFT and SET-LRP and its application in preparing size-controlled super-paramagnetic Fe3O4 nanoparticles as a stabilizer
其他题名: Synthesis of PAA-g-PNIPAM well-defined graft polymer by sequential RAFT and SET-LRP and its application in preparing size-controlled super-paramagnetic Fe3O4 nanoparticles as a stabilizer
作者: Jiang XY(姜秀玉)1; Zhai SJ(翟素娟)1; Jiang X(江雪)1; Lu GL(陆国林)1; Huang XY(黄晓宇)1
通讯作者: 陆国林 ; 黄晓宇
刊名: Polymer
发表日期: 2014
DOI: 10.1016/j.polymer.2014.05.050
卷: 55, 期:16, 页:3703-3712
收录类别: SCI
英文摘要: A series of well-defined double hydrophilic graft copolymers, poly(acrylic acid)-g-poly(N-iso-propylacrylamide) (PAA-g-PNIPAM), was employed as a novel water-soluble coating for constructing superparamagnetic iron oxide nanoparticles. The copolymer was synthesized via a three-step procedure: firstly, a well-defined hydrophobic PtBA-based backbone, poly(tert-butyl 2-((2-chloropropanoyloxy)-methyl)acrylate)-co-poly(tert-butyl acrylate), (PtBCPMA(19)-co-PtBA(18)), was prepared through RAFT copolymerization of a new trifunctional acrylic monomer, tert-butyl 2-((2-chloropropanoyloxy)methyl) acrylate and tert-butyl acrylate; secondly, taking this backbone as a macroinitiator to initiate SET-LRP of N-isopropylacrylamide resulted in well-defined (poly(tert-butyl 24(2-chloropropanoyloxy)methyl)acrylate)-co-poly(tert-butyl acrylate))-g-poly(N-isopropylacrylamide) ((PtBCPMA-co-PtBA)-g-PNIPAM) amphiphilic graft copolymers with relatively narrow polydispersities (M-w/M-n <= 1.31); thirdly, handling (PtBCPMA-co-PtBA)-g-PNIPAM in acidic conditions afforded PAA-g-PNIPAM graft copolymers. The resulting PAA-g-PNIPAM copolymers were directly utilized as a polymeric stabilizer in the preparation of superparamagnetic Fe3O4 nanoparticles. The particle size can be readily tuned in the range of 12.1-23.2 nm by varying the amount of PAA-g-PNIPAM copolymer or the length of PNIPAM side chain. Besides, the structure and properties of prepared Fe3O4/polymer nanocomposites were characterized by XRD, FT-IR, TGA, TEM, and magnetic measurement in detail. (C) 2014 Elsevier Ltd. All rights reserved.
语种: 英语
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内容类型: 期刊论文
URI标识: http://ir.sioc.ac.cn/handle/331003/38901
Appears in Collections:高分子材料研究室_期刊论文

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作者单位: 1.中科院上海有机化学研究所
2.复旦大学

Recommended Citation:
Jiang XY,Zhai SJ,Jiang X,et al. Synthesis of PAA-g-PNIPAM well-defined graft polymer by sequential RAFT and SET-LRP and its application in preparing size-controlled super-paramagnetic Fe3O4 nanoparticles as a stabilizer[J]. Polymer,2014,55(16):3703-3712.
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