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首页> 外文期刊>Journal of nano research >Preparation and characterization of poly(vinyl butyral)-polyaniline-montmorillonite nanocomposites
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Preparation and characterization of poly(vinyl butyral)-polyaniline-montmorillonite nanocomposites

机译：聚乙烯醇缩丁醛-聚苯胺-蒙脱土纳米复合材料的制备与表征

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摘要

Poly(vinyl butyral)-polyaniline-sodium montmorillonite nanocomposites were prepared via polymerization of aniline between clay mineral platelets at two different pH levels (2.0 and 5.0), followed by dispersion of the polyaniline-sodium montmorillonite nanocomposite in a poly(vinyl butyral) solution. A comparison was made of the effect of the pH levels and the polyaniline-sodium montmorillonite nanocomposite precursor on the final structures of the poly(vinyl butyral) nanocomposites and their electrical conductivities. X-ray diffraction patterns revealed the formation of nanocomposites at both pH levels. UV-Vis spectra indicated that the polyaniline formed at both pH levels was conductive, with the UV-Vis spectra presenting a band at 420 nm corresponding to the polaronic form and the beginning of a new band at 600 nm indicating the presence of polaronic segments. FTIR spectra revealed the peaks of the groups present in polyaniline and poly(vinyl butyral) nanocomposites. The electrical conductivities of the polyaniline and poly(vinyl butyral) nanocomposites prepared at pH 2.0 were lower than those of the same nanocomposites prepared at pH 5.0, probably due to the lower formation of polyaniline chains in a more acidic dispersion and to the final configuration of polyaniline in the nanocomposites.
机译：聚（乙烯醇缩丁醛）-聚苯胺-蒙脱土纳米复合材料的制备是通过在两种不同pH值（2.0和5.0）下粘土矿物血小板之间的苯胺聚合，然后将聚苯胺-蒙脱土钠纳米复合材料分散在聚（乙烯醇缩丁醛）溶液中来制备的。 。比较了pH值和聚苯胺-钠蒙脱土纳米复合材料前体对聚乙烯醇缩丁醛纳米复合材料最终结构及其电导率的影响。 X射线衍射图谱表明在两个pH水平下都形成了纳米复合材料。 UV-Vis光谱表明，在两个pH值下形成的聚苯胺都是导电的，UV-Vis光谱在420 nm处出现一个与极化子形式相对应的谱带，在600 nm处出现一个新的谱带开始，表明存在极化子片段。 FTIR光谱揭示了聚苯胺和聚乙烯醇缩丁醛纳米复合材料中存在的基团的峰。在pH 2.0下制备的聚苯胺和聚乙烯醇缩丁醛纳米复合材料的电导率比在pH 5.0下制备的相同的纳米复合材料的电导率低，这可能是由于聚苯胺链在更酸性的分散液中形成较少，以及纳米复合物中的聚苯胺。

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  • 来源
    《Journal of nano research》 |2012年第2012期|p.291-297|共7页
  • 作者

    Priscila Anadao; Francisco Rolando Valenzuela Diaz; Helio Wiebeck;

  • 作者单位

    Department of Metallurgical and Materials Engineering, Polytechnic School, University of Sao Paulo - USP , Av. Prof. Mello Moraes, 2463, Cid. Universitaria, 05508-900 Sao Paulo, SP, Brazil;

    Department of Metallurgical and Materials Engineering, Polytechnic School, University of Sao Paulo - USP , Av. Prof. Mello Moraes, 2463, Cid. Universitaria, 05508-900 Sao Paulo, SP, Brazil;

    Department of Metallurgical and Materials Engineering, Polytechnic School, University of Sao Paulo - USP , Av. Prof. Mello Moraes, 2463, Cid. Universitaria, 05508-900 Sao Paulo, SP, Brazil;

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  • 正文语种 eng
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  • 关键词

    polyaniline; poly(vinyl butyral); sodium montmorillonite; nanocomposites; electrical conductivity;

    机译：聚苯胺聚乙烯醇缩丁醛;蒙脱石钠;纳米复合材料电导率;

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