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Synthesis of polypyrrole nanoparticles and their applications in electrically conductive adhesives for improving conductivity

机译：聚吡咯纳米粒子的合成及其在导电粘合剂中提高电导率的应用

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摘要

Herein, we report an innovative application of doping conjugated-polypyrrole nanoparticles (PPy NPs) into electrically conductive adhesives (ECAs) to prepare low-electrical resistivity interconnecting materials. PPy NPs were synthesized via a facile one-step chemical oxidative polymerization method at room temperature with the average diameter as small as 86.8 nm. Particles' diameters and dispersity were manipulated under different polymerization conditions through the adjustment of weight percentages and molecular weights of polyvinylpyrrolidone (PVP) as the surfactants. Results showed that higher concentrations of PVP and the longer chains of PVPs resulted in smaller diameters of PPy NPs. We also found that a suitable portion of ethanol in the polymerization mixtures gives rise to a better dispersity than that observed in mixtures without ethanol. When a small amount of PPy NPs was added into traditional epoxy resin-based and silver-flakes-filled ECAs, the resistance measurements showed an enhancement in the electrical conductivity, or in other words, a reduction in resistivity significantly. For example, the electrical resistivity of 70 wt% silver-filled ECAs was reduced from 1.6 x 10(-3) U cm to 9.4 x 10(-5) U cm by using only 2.5 wt% PPy NPs as the dopants. Thus, our results confirmed new applications of PPy NPs in the field of ECAs for decreasing the resistance, reducing the dosage of silver in ECAs, and achieving flexible devices. Finally, flexible electrical patterns were printed on paper and polyimide substrates were used as conducting circuits to light LED devices.
机译：在此，我们将掺杂共轭 - 聚吡咯纳米颗粒（PPY NP）的创新施加到导电粘合剂（ECA）中以制备低电阻率互连材料。通过平均直径为86.8nm的平均直径，通过面部的一步化学氧化聚合方法合成PPY NP。通过调节聚乙烯吡咯烷酮（PVP）作为表面活性剂的重量百分比和分子量在不同的聚合条件下操纵颗粒直径和分散性。结果表明，PVP较高浓度和PVP的较长链导致较小的PPY NPS直径。我们还发现，聚合混合物中的合适部分乙醇产生比在没有乙醇的混合物中观察到的更好的分散性。当将少量PPY NPS加入到传统的环氧树脂和银薄片填充的ECA中时，电阻测量显示导电性或换句话说显着降低电阻率。例如，通过仅使用仅2.5wt％的ppy nps作为掺杂剂，将70wt％的银填充的ECA的电阻率从1.6×10（3）u cm至9.4×10（-5）降低。因此，我们的结果证实了PPY NP在ECA领域的新应用，以降低抗性，减少ECA中银的剂量，实现柔性器件。最后，在纸上印刷柔性电气图案，并使用聚酰亚胺基板作为光LED装置的导电电路。

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  • 来源
    《RSC Advances》 |2017年第84期|共7页
  • 作者

    Wen Jiayue; Tian Yanhong; Mei Zhipeng; Wu Weizhen; Tian Yanqing;

  • 作者单位

    Harbin Inst Technol State Key Lab Adv Welding &

    Joining Harbin 150001 Heilongjiang Peoples R China;

    Harbin Inst Technol State Key Lab Adv Welding &

    Joining Harbin 150001 Heilongjiang Peoples R China;

    Southern Univ Sci &

    Technol Dept Mat Sci &

    Engn Shenzhen 518055 Peoples R China;

    Southern Univ Sci &

    Technol Dept Mat Sci &

    Engn Shenzhen 518055 Peoples R China;

    Southern Univ Sci &

    Technol Dept Mat Sci &

    Engn Shenzhen 518055 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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