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Universal Control on Pyroresistive Behavior of Flexible Self-Regulating Heating Devices

机译：柔性自调节加热装置热阻行为的通用控制

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摘要

Smart heating devices with reliable self-regulating performances and high efficiency, combined with additional properties like mechanical flexibility, are of particular interest in healthcare, soft robotics, and smart buildings. Unfortunately, the development of smart heaters necessitates managing normally conflicting requirements such as good self-regulating capabilities and efficient Joule heating performances. Here, a simple and universal materials design strategy based on a series connection of different conductive polymer composites (CPC) is shown to provide unique control over the pyroresistive properties. Hooke's and Kirchhoff's laws of electrical circuits can simply predict the overall pyroresistive behavior of devices connected in series and/or parallel configurations, hence providing design guidelines. An efficient and mechanically flexible Joule heating device is hence designed and created. The heater is characterized by a zero temperature coefficient of resistance below the self-regulating temperature, immediately followed by a large and sharp positive temperature coefficient (PTC) behavior with a PTC intensity of around 10(6). Flexibility and toughness is provided by the selected elastomeric thermoplastic polyurethane (TPU) matrix as well as the device design. The universality of the approach is demonstrated by using different polymer matrices and conductive fillers for which repeatable results are consistently obtained.
机译：具有可靠的自我调节性能和高效率的智能加热设备，再加上诸如机械柔韧性的其他特性，在医疗保健，软机器人和智能建筑中特别受到关注。不幸的是，智能加热器的开发需要管理通常相互矛盾的要求，例如良好的自调节功能和有效的焦耳加热性能。在此，显示了一种基于不同导电聚合物复合材料（CPC）串联连接的简单通用材料设计策略，可提供对热阻特性的独特控制。胡克和基尔霍夫的电路定律可以简单地预测串联和/或并联配置的设备的整体热阻行为，从而提供设计指导。因此，设计并制造了一种高效且机械灵活的焦耳加热装置。加热器的特征在于低于自调节温度的电阻的零温度系数，紧随其后的是大而尖锐的正温度系数（PTC）行为，PTC强度约为10（6）。选定的弹性热塑性聚氨酯（TPU）基质以及设备设计可提供灵活性和韧性。通过使用不同的聚合物基体和导电填料，可以证明该方法的普遍性，可始终如一地获得可重复的结果。

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  • 来源
    《Advanced Functional Materials》 |2017年第39期|1702253.1-1702253.9|共9页
  • 作者

    Liu Yi; Zhang Han; Porwal Harshit; Tu Wei; Evans Jamie; Newton Mark; Busfield James J. C.; Peijs Ton; Bilotti Emiliano;

  • 作者单位

    Queen Mary Univ London, Sch Engn & Mat Sci, Mile End Rd, London E1 4NS, England;

    Queen Mary Univ London, Sch Engn & Mat Sci, Mile End Rd, London E1 4NS, England|Queen Mary Univ London, Nanoforce Technol Ltd, Joseph Priestley Bldg,Mile End Rd, London E1 4NS, England;

    Queen Mary Univ London, Sch Engn & Mat Sci, Mile End Rd, London E1 4NS, England|Queen Mary Univ London, Nanoforce Technol Ltd, Joseph Priestley Bldg,Mile End Rd, London E1 4NS, England;

    Queen Mary Univ London, Nanoforce Technol Ltd, Joseph Priestley Bldg,Mile End Rd, London E1 4NS, England;

    LMK Thermosafe Ltd, 9-10 Moonhall Business Pk,Helions Bumpstead Rd, Haverhill CB9 7AA, Suffolk, England;

    LMK Thermosafe Ltd, 9-10 Moonhall Business Pk,Helions Bumpstead Rd, Haverhill CB9 7AA, Suffolk, England;

    Queen Mary Univ London, Sch Engn & Mat Sci, Mile End Rd, London E1 4NS, England;

    Queen Mary Univ London, Sch Engn & Mat Sci, Mile End Rd, London E1 4NS, England|Queen Mary Univ London, Nanoforce Technol Ltd, Joseph Priestley Bldg,Mile End Rd, London E1 4NS, England;

    Queen Mary Univ London, Sch Engn & Mat Sci, Mile End Rd, London E1 4NS, England|Queen Mary Univ London, Nanoforce Technol Ltd, Joseph Priestley Bldg,Mile End Rd, London E1 4NS, England;

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  • 关键词

    carbon nanotubes; conductive polymer composites; positive temperature coefficient; self-regulating; smart heaters;

    机译：碳纳米管;导电聚合物复合材料;正温度系数;自调节;智能加热器;

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