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Ink-Jet Printed Conducting Polyaniline based Flexible Humidity Sensor

机译：喷墨印刷电导式柔性湿度传感器

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摘要

Ink-Jet Printed, Intrinsically Conducting Polymer (ICP), polyaniline have been used for humidity sensing at room temperature. Polyaniline based, aqueous ink-jet printable ink has been synthesized by single step, chemical oxidative polymerization technique. Sulphonic acids were used as a dopant during the in-situ polymerization process. This is a single step polymerization process for the direct synthesis of conducting emeraldine salt phase of the polymer as an ink formulation. The synthesized polyaniline ink was further characterized by spectroscopic (UV-Vis. and FT-IR) analysis which confirmed the presence of conducting emeraldine salt phase of the polymer. The viscosity of the ink was measured by using Brook-field viscometer. The successive trials were performed for the printing of IDT pattern on the flexible, untreated polymer substrate using HP ink-jet-printer. The printed sensor was subjected for the humidity sensing measurements. The change in the resistance with change in the %RH was observed. It is suggested that the increase in conductivity at high humidity may be related to a vapour-induced change in the transfer of charge carriers between the polymer chains. The synthesized polyaniline based ink can also be considered as a good candidate for variety of ink-jet printed low cost electronics devices.
机译：喷墨印刷，本征导电聚合物（ICP），聚苯胺用于室温下湿度感测。基于聚苯胺，通过单步，化学氧化聚合技术合成了水性喷墨可印刷油墨。在原位聚合过程中使用磺酸作为掺杂剂。这是一种单一步骤聚合方法，用于直接合成聚合物的欧洲盐相作为油墨制剂。通过光谱（UV-Vis和FT-IR）分析，进一步表征了合成的聚苯胺油墨，其证实了导电聚合物的祖母绿盐相的存在。该油墨的粘度是通过使用布鲁克场粘度计测定。使用HP喷墨打印机对柔性未处理的聚合物基材上的IDT模式印刷进行连续试验。对印刷传感器进行湿度感测测量。观察到随着％RH的变化的抵抗力的变化。建议在高湿度下的导电性的增加可以与聚合物链之间的电荷载体转移的蒸气引起的变化有关。合成的聚苯胺基油墨也可以被认为是喷墨印刷的低成本电子设备各种的良好候选者。

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