Despite the resistance-type gas sensors attracting intensive research interest, the vulnerability to the interference of humidity is a great challenge for their large-scale productions and applications. Herein, a convenient “gas-sensitized sensing material + adhesive” approach for the fabrication of superhydrophobic interface has been proposed to settle the problem. The multiwalled carbon nanotubes (MWCNTs)/styrene-ethylene/butylene-styrene block copolymer (SEBS) layer formed by spraying the cyclohexane suspension of MWCNTs and SEBS with micro/nanostructure endows the sensor with outstanding superhydrophobic property, presenting that the apparent contact angles (CA) are up to 179.6∘. The superhydrophobic paper sensor exhibited high sensing performance for acetone vapor and most importantly exceptional anti-humidity. The response of as-prepared sensor for other gaseous chemicals was consistent with that of MWCNTs, which indicated that the “gas-sensitized sensing [Formula: see text]” approach did not change the MWCNTs gas-sensitive characteristics. The approach builds an efficient bridge between gas-sensitive particles and flexible, superhydrophobic systems, inspiring a new simple way to the development of gas sensor with high immunity to humidity.

中文翻译：

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一种构建超疏水纸质传感器的简便方法，用于高抗湿性气体检测

尽管电阻式气体传感器引起了广泛的研究兴趣，但其易受湿度干扰的脆弱性对其大规模生产和应用来说是一个巨大的挑战。在此，提出了一种方便的“气敏传感材料+粘合剂”制备超疏水界面的方法来解决该问题。多壁碳纳米管 (MWCNTs)/苯乙烯-乙烯/丁烯-苯乙烯嵌段共聚物 (SEBS) 层通过喷涂具有微/纳米结构的 MWCNTs 和 SEBS 的环己烷悬浮液形成，赋予传感器出色的超疏水性能，呈现出表观接触角 ( CA) 高达 179.6∘. 超疏水纸传感器表现出对丙酮蒸气的高传感性能，最重要的是具有出色的抗湿性。所制备的传感器对其他气态化学物质的响应与多壁碳纳米管的响应一致，这表明“气敏传感[公式：见正文]”方法没有改变多壁碳纳米管的气敏特性。该方法在气敏颗粒和灵活的超疏水系统之间建立了一座有效的桥梁，为开发具有高抗湿性的气体传感器提供了一种新的简单方法。