基于柔性气体传感器制作区分目标气体的可穿戴口罩

发布时间：2018-04-23 07:30

本文选题：柔性气体传感器 + 分辨气体　；参考：《吉林大学》2017年硕士论文

【摘要】：近年来,气体传感器在环境监测、工业过程控制、清洁能源调配、医疗诊断等领域得到了广泛的应用。此外,在室温下工作的气体传感器是非常有吸引力的,因为它具有非常低的功耗,并且不需要用于高温操作的加热器,从而简化了传感器器件的制造,并降低了运行成本。目前,各种材料如金属氧化物[1-3],有机半导体[4-8],碳纳米管和石墨烯等,已被用于制作室温气体传感器,从而推动了可穿戴传感器的发展[9-12]。与传统的室温气体传感器相比,穿戴式气体传感器具有显著的优点包括优良的悬垂性、柔软性、耐久性、重量轻、成本低。最近,各种可穿戴式气体传感器已被广泛研究。例如,Yun et al.报道采用静电自组装方法还原氧化石墨烯将其组装到纱线上,该传感器具有化学稳定性、机械稳定性和对二氧化氮气体的高响应[13]。基于聚偏异丁酯/甲基混合酯和多壁碳纳米管线状气体传感器也被Kerdcharoen等人研究,可用于检测氨气[14]。此外,其他一些研究人员制作了人类安全和健康监测可穿戴传感器[15]。然而,基于上述气体传感器的一个重要问题是,在多种气体共存的复杂条件下可能无法有效区分出目标气体。为此,研究人员尝试采用“one key to one lock”即“一种传感器对应一种目标气体”的方法来制备高性能的可穿戴气体传感器,从而有效区分目标气体[17]。在这项工作中,我们描述了三种基于导电纤维的气体传感器以检测不同的有毒气体,分别为:尼龙绳作为柔性衬底和尼龙绳表面包裹单壁碳纳米管(SWCNT),多壁碳纳米管、单壁碳纳米管@Zn O量子点(SWCNT重组@Zn O)。所制备的气体传感器具有良好的灵敏度、良好的可逆性、对甲醛、氨和乙醇的良好选择性。同时,该柔性气体传感器在弯曲状态下灵敏度并未降低,经过多次退化实验后该传感器仍保持良好的性能,以此证明该传感器可用于制作柔性可穿戴设备。在本论文中,我们提出了一种基于三种类型的可穿戴式气体传感器的多功能面罩,每个气体传感器对应一个独立的、具有不同颜色的LED,分别为红色,绿色和蓝色。在初始状态下,即多功能面罩的密封罩中没有目标气体时,传感器的电阻不会改变且用于指示的LED灯处于黑暗状态。当目标气体注入密封盖时,气体传感器的电阻将会出现一定程度的增大,同时LED将切换到发光状态。通过气体传感器的三种不同指示状态,可以区分不同的目标气体。
[Abstract]:In recent years, gas sensors have been widely used in the fields of environmental monitoring, industrial process control, clean energy allocation, medical diagnosis and other fields. In addition, gas sensors working at room temperature are very attractive because it has very low power consumption and does not need to be used for high temperature operating heaters, thus simplifying the sensor At present, various materials, such as metal oxide [1-3], organic semiconductor [4-8], carbon nanotube and graphene, have been used to make room temperature gas sensors, thus promoting the development of wearable sensor [9-12]. and the traditional room temperature sensor, the wearable gas sensor is significant. The advantages include fine drapability, softness, durability, light weight, and low cost. Recently, various wearable gas sensors have been widely studied. For example, Yun et al. reports that the electrostatic self assembly method is used to restore graphene oxide to the yarns by electrostatic self-assembly. The sensor has chemical stability, mechanical stability and nitrogen dioxide gas. The high response [13]. based on polyisobutyl methyleth / methyl mixed ester and multi walled carbon nanotube like gas sensors has also been studied by Kerdcharoen et al. Can be used to detect ammonia [14].. Other researchers have produced human safety and health monitoring wearable sensor [15]., however, an important question based on the above gas sensor The problem is that the target gas may not be effectively separated under the complex conditions of coexistence of various gases. Therefore, the researchers try to use "one key to one lock", "a sensor corresponding to a kind of target gas", to prepare high-performance wearable gas sensors, from which the target gas [17]. is effectively distinguished from the target gas. We describe three kinds of gas sensors based on conductive fiber to detect different toxic gases, the nylon ropes are coated with single wall carbon nanotubes (SWCNT), multi wall carbon nanotubes, and single walled carbon nanotubes @Zn O quantum dots (SWCNT recombination @Zn O) on the flexible substrate and nylon rope. The gas sensors prepared have good sensitivity, Good reversibility, good selectivity for formaldehyde, ammonia and ethanol. At the same time, the sensitivity of the flexible gas sensor is not reduced in the bending state. After many degenerate experiments, the sensor still maintains good performance, which proves that the sensor can be used in the manufacture of flexible wearable devices. In this paper, we propose a method based on this paper. A multi-functional mask for three types of wearable gas sensors, each of which corresponds to an independent, different color LED, red, green and blue. In the initial state, when there is no target gas in the seal cover of the multi-functional mask, the resistance of the sensor will not change and the LED lamp is in the dark. Dark state. When the target gas is injected into the seal cover, the resistance of the gas sensor will increase to a certain extent, and the LED will switch to the luminous state. The different target gases can be distinguished by the three different indication states of the gas sensor.

【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP212

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