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首页> 外文期刊>RSC Advances >Significantly enhanced dielectric properties and energy storage density for high-k cyanate ester nanocomposites through building good dispersion of pristine carbon nanotubes in a matrix based on in situ non-covalent interaction with phenolphthalein poly(ether sulfone)
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Significantly enhanced dielectric properties and energy storage density for high-k cyanate ester nanocomposites through building good dispersion of pristine carbon nanotubes in a matrix based on in situ non-covalent interaction with phenolphthalein poly(ether sulfone)

机译：通过基于原位的非共价相互作用与酚酞（乙醚砜）的原位非共价相互作用，显着提高高k氰酸酯纳米复合材料的介电性能和储能密度

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摘要

How to disperse pristine carbon nanotubes with non-covalent interaction for fabricating high-k polymer nanocomposites with low dielectric loss and high energy storage density (W-e) is still a big but interesting challenge. Herein, a fully compatible and transparent polymer blend consisting of phenolphthalein poly(ether sulfone) (cPES) and cyanate ester (CE) was specially designed as the resin matrix, and then new conductor/polymer composites based on multi-walled carbon nanotubes (MWCNTs) and CE/cPES were facilely prepared through melting blending. The structure, dielectric properties and W-e values of MWCNT/CE and MWCNT/CE/cPES composites were systematically studied. Compared with MWCNT/CE composites, MWCNT/CE/cPES composites have a much lower percolation threshold that is as low as 0.89 wt%, only about 0.25 times of that of MWCNT/CE composites; besides, MWCNT/CE/cPES composites possess greatly improved dielectric constants, much larger breakdown strength and W-e as well as greatly decreased dielectric loss. The origin of these desirable properties was discussed through investigating the structure and building equivalent circuits. Results show that an in situ non-covalent interaction is formed between MWCNTs and cPES during the melting blending process, while cPES is compatible with CE resin, so MWCNTs have excellent dispersion in the CE/cPES matrix, endowing MWCNT/CE/cPES composites with unique structure and desirable dielectric properties.
机译：如何用非共价相互作用分散原始碳纳米管，用于制造具有低介电损耗和高能储存密度（W-E）的高k聚合物纳米复合材料仍然是一个大而有趣的挑战。在此，由酚酞（醚砜）（CPE）和氰酸酯（Ce）组成的完全相容且透明的聚合物共混物，特别设计为树脂基质，然后是基于多壁碳纳米管的新导体/聚合物复合材料（MWCNT ）通过熔融混合，施用CE / CPES。系统地研究了MWCNT / Ce和MWCNT / CE / CE / CCE复合材料的结构，电介质性能和W-E值。与MWCNT / CE复合材料相比，MWCNT / CE / CPES复合材料具有远低于0.89wt％的低渗透阈值，仅为MWCNT / CE复合材料的约0.25倍;此外，MWCNT / CE / CPES复合材料具有极大改善的介电常数，更大的击穿强度和W-E以及大大降低的介电损耗。通过研究结构和建筑等效电路来讨论这些理想性质的起源。结果表明，在熔融混合过程中，在MWCNT和CPE之间形成原位非共价相互作用，而CPES与CE树脂相容，因此MWCNT在CE / CPES矩阵中具有优异的分散，赋予MWCNT / CE / CPES复合材料独特的结构和理想的介电性能。

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  • 来源
    《RSC Advances》 |2015年第115期|共10页
  • 作者

    Zhao Lin; Yuan Li; Liang Guozheng; Gu Aijuan;

  • 作者单位

    Soochow Univ Jiangsu Key Lab Adv Funct Polymer Design &

    Applic Dept Mat Sci &

    Engn Coll Chem Chem Engn &

    Mat Sci Suzhou Peoples R China;

    Soochow Univ Jiangsu Key Lab Adv Funct Polymer Design &

    Applic Dept Mat Sci &

    Engn Coll Chem Chem Engn &

    Mat Sci Suzhou Peoples R China;

    Soochow Univ Jiangsu Key Lab Adv Funct Polymer Design &

    Applic Dept Mat Sci &

    Engn Coll Chem Chem Engn &

    Mat Sci Suzhou Peoples R China;

    Soochow Univ Jiangsu Key Lab Adv Funct Polymer Design &

    Applic Dept Mat Sci &

    Engn Coll Chem Chem Engn &

    Mat Sci Suzhou Peoples R China;

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  • 中图分类 化学;
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