Single Polymer Chain Grafted Fe<sub>3</sub>O<sub>4</sub> Composite Janus Nanoparticle

Jing-yun Jing; Xiao-hui Yao; Zhen-zhong Yang

doi:10.11777/j.issn1000-3304.2018.17233

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Single Polymer Chain Grafted Fe₃O₄ Composite Janus Nanoparticle

Research Article | 更新时间：2021-01-26

- Single Polymer Chain Grafted Fe₃O₄ Composite Janus Nanoparticle
- Acta Polymerica Sinica Vol. 0, Issue 8, Pages: 1066-1072(2018)
- 作者机构：
  
  高分子物理与化学国家重点实验室中国科学院化学研究所　北京 100190
  中国科学院大学　北京 100049
- 作者简介：
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2018.17233
  CLC：
- Published：2018-8，
  
  Received：22 August 2017，
  
  Revised：3 November 2017，
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Jing-yun Jing, Xiao-hui Yao, Zhen-zhong Yang. Single Polymer Chain Grafted Fe₃O₄ Composite Janus Nanoparticle. [J]. Acta Polymerica Sinica 0(8):1066-1072(2018)
DOI：

Jing-yun Jing, Xiao-hui Yao, Zhen-zhong Yang. Single Polymer Chain Grafted Fe₃O₄ Composite Janus Nanoparticle. [J]. Acta Polymerica Sinica 0(8):1066-1072(2018) DOI： 10.11777/j.issn1000-3304.2018.17233.

摘要

采用溶剂热法制备油酸保护的Fe

纳米颗粒，通过硅烷配体交换在颗粒表面引入氨基. 基于氨基快速淬灭阳离子活性种，将阳离子聚合制备的活性高分子链如聚(4-氯甲基苯乙烯)键接到氨基改性的Fe

纳米颗粒表面，制备高分子链/Fe

复合纳米颗粒. 分子量决定键接活性高分子链数目. 当高分子流体力学尺寸大于纳米颗粒直径时，空间排斥效应保证单根高分子链键接到Fe

纳米颗粒(10 nm)，得到呈降落伞结构的复合Janus纳米颗粒，高分子链分布在Fe

颗粒一侧. 当高分子链尺寸较小时，多根高分子链键接到纳米颗粒表面. 研究了该复合Janus纳米颗粒双亲特性. 作为固体乳化剂可容易乳化水/油体系得到稳定乳液. 该Janus纳米颗粒在油水界面通过自组装可得到单层薄膜.

Abstract

An amine group capped Fe

nanoparticle (NP) (~ 10 nm) is derived after ligand exchange with a silane against the oleic acid capped Fe

NP.

Via

the termination between the cationic end of a living polymer chain with the amine group onto the NP surface

polymer chains are covalently grafted onto the NP surface

forming the polymer/Fe

composite NP. The number of the grafted living polymer chains is determined by the molecular weight of the polymer chains. When a sufficiently long polymer chain with hydrodynamic size larger than the NP diameter is used

the arisen steric repulsion enables only one polymer chain to graft onto the NP surface. The obtained composite NP displays a parachute structure due to the distribution of the grafting polymer chain on one side of the modified Fe

NP surface. When a short polymer chain is used

many chains can graft onto the NP surface to form a core/shell like structure. For example

the single poly(4-vinylbenzyl chloride) chain grafted an amine group capped Fe

composite Janus NP is amphiphilic

which can serve as a functional solid emulsifier that can easily emulsify water/toluene to obtain a stabilized emulsion. In analogy of a molecular surfactant

a self-assembled monolayer from the composite NPs is achieved by crosslinking the composite NPs at a water/oil interface. The Fe

composite Janus NPs can be manipulated with a magnet. Accordingly

the stabilized emulsion droplets emulsified by the composite Janus NPs can be driven with a magnet. This report provides a simple method to massively synthesize Janus NPs at a high solid content. In addition

a huge family of functional Janus NPs will be derived after selective growth of functional species from either poly(4-vinylbenzyl chloride) or (and) the amine group capped side of the parent composite NP.

关键词

纳米颗粒Fe3O4聚合物单链Janus双亲性

Keywords

NanoparticleFe3O4Single polymer chainJanusAmphiphilic

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School of Materials Science and Engineering, South China University of Technology

State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences

Department of Polymer Science and Engineering, Zhejiang University

MOE Key Laboratory of Macromolecular Synthesis and Functionalization

Department of Chemical and Biomolecular Engineering, University of California at Los Angeles, Los Angeles, CA 90095, USA

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Single Polymer Chain Grafted Fe3O4 Composite Janus Nanoparticle

DOI：10.11777/j.issn1000-3304.2018.17233

摘要

Abstract

关键词

Keywords

references

Single Polymer Chain Grafted Fe₃O₄ Composite Janus Nanoparticle