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A method to construct perfect 3D polymer/graphene oxide core-shell microspheres via electrostatic self-assembly

机译：一种通过静电自组装构建完美3D聚合物/石墨烯氧化物芯壳微球的方法

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摘要

In this study, a method to construct perfect three-dimensional (3D) polymer/graphene oxide (GO) core-shell microspheres was proposed via electrostatic self-assembly. 2D GO nanosheets were successfully wrapped onto polymer microspheres to form a perfect 3D core-shell structure with uniform shell thickness under the action of an electrostatic attraction force. The GO nanosheets, with a thickness of 1.5-2 nm and an area over 2 x 1 mu m(2), were firstly prepared from graphite, and then cationic polystyrene (PS) microspheres with 0.246% and 0.715% surface concentrations of -N(CH3)(3)(+) were successfully synthesized. After that, PS/GO core-shell microspheres were constructed from the GO nanosheets and the cationic PS microspheres. It was found that different cationic PS microspheres led to different assembly speeds. SEM and TEM images of rippled silk waves on the surface of the PS/GO core-shell microspheres not only indicated the perfect polymer/GO core-shell structure, but also demonstrated the strong binding between the two materials. It was also revealed that the thicknesses of the shells of the PS/GO core-shell microspheres were under good control, and the thicknesses of shells from different cationic PS microspheres were 9-13 nm and 80-100 nm. The method proposed here has proved to be a valuable tool for the assembly of 3D microstructures from polymers and graphene oxide (or graphene).
机译：在该研究中，通过静电自组装提出了一种构建完美三维（3D）聚合物/石墨烯氧化物（GO）核 - 壳微球的方法。 2D GO纳米片成功包裹在聚合物微球上，以形成静电吸引力的作用下具有均匀壳厚度的完美3D芯壳结构。厚度为1.5-2nm的Go纳米片和超过2×1μm（2）的区域，然后用石墨制备，然后阳离子聚苯乙烯（PS）微球，0.246％和0.715％的表面浓度为-N （CH3）（3）（+）成功合成。之后，PS / GO核 - 壳微球由Go纳米片和阳离子PS微球构成。发现不同的阳离子PS微球导致不同的装配速度。 PS / GO核心 - 壳微球表面上的波纹丝波的SEM和TEM图像不仅表明了完美的聚合物/去核 - 壳结构，而且还证明了两种材料之间的强粘合。还揭示了PS / GO核 - 壳微球的厚度良好的控制良好，来自不同阳离子PS微球的壳的厚度为9-13nm和80-100nm。本文所提出的方法证明是来自聚合物和石墨烯氧化物（或石墨烯）的3D微观结构组装的有价值的工具。

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  • 来源
    《RSC Advances》 |2015年第41期|共10页
  • 作者

    Li Ying; Xu Yu; Zhou Tao; Zhang Aiming; Bao Jianjun;

  • 作者单位

    Sichuan Univ State Key Lab Polymer Mat Engn China Polymer Res Inst Chengdu 610065 Peoples R China;

    Sichuan Univ State Key Lab Polymer Mat Engn China Polymer Res Inst Chengdu 610065 Peoples R China;

    Sichuan Univ State Key Lab Polymer Mat Engn China Polymer Res Inst Chengdu 610065 Peoples R China;

    Sichuan Univ State Key Lab Polymer Mat Engn China Polymer Res Inst Chengdu 610065 Peoples R China;

    Sichuan Univ State Key Lab Polymer Mat Engn China Polymer Res Inst Chengdu 610065 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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