Porous Ionic Membrane Based Flexible Humidity Sensor and its Multifunctional Applications

Tie Li; Lianhui Li; Hongwei Sun; Yan Xu; Xuewen Wang; Hui Luo; Zheng Liu; Ting Zhang

doi:10.1002/advs.201600404

Porous Ionic Membrane Based Flexible Humidity Sensor and its Multifunctional Applications

Tie Li, Lianhui Li, Hongwei Sun, Yan Xu, Xuewen Wang, Hui Luo, Zheng Liu, Ting Zhang

Research output: Contribution to journal › Article › peer-review

259 Scopus citations

Abstract

A highly flexible porous ionic membrane (PIM) is fabricated from a polyvinyl alcohol/KOH polymer gel electrolyte, showing well-defined 3D porous structure. The conductance of the PIM changes more than 70 times as the relative humidity (RH) increases from 10.89% to 81.75% with fast and reversible response at room temperature. In addition, the PIM-based sensor is insensitive to temperature (0–95 °C) and pressure (0–6.8 kPa) change, which indicates that it can be used as highly selective flexible humidity sensor. A noncontact switch system containing PIM-based sensor is assembled, and results show that the switch responds favorably to RH change caused by an approaching finger. Moreover, an attachable smart label using PIM-based sensor is explored to measure the water contents of human skin, which shows a great linear relationship between the sensitivity of the sensor and the facial water contents measured by a commercial reference device.

Original language	English
Article number	1600404
Journal	Advanced Science
Volume	4
Issue number	5
DOIs	https://doi.org/10.1002/advs.201600404
State	Published - 1 May 2017
Externally published	Yes

Keywords

flexible sensors
humidity sensors
polymer electrolytes
polyvinyl alcohol
porous ionic membranes

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10.1002/advs.201600404

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title = "Porous Ionic Membrane Based Flexible Humidity Sensor and its Multifunctional Applications",

abstract = "A highly flexible porous ionic membrane (PIM) is fabricated from a polyvinyl alcohol/KOH polymer gel electrolyte, showing well-defined 3D porous structure. The conductance of the PIM changes more than 70 times as the relative humidity (RH) increases from 10.89% to 81.75% with fast and reversible response at room temperature. In addition, the PIM-based sensor is insensitive to temperature (0–95 °C) and pressure (0–6.8 kPa) change, which indicates that it can be used as highly selective flexible humidity sensor. A noncontact switch system containing PIM-based sensor is assembled, and results show that the switch responds favorably to RH change caused by an approaching finger. Moreover, an attachable smart label using PIM-based sensor is explored to measure the water contents of human skin, which shows a great linear relationship between the sensitivity of the sensor and the facial water contents measured by a commercial reference device.",

keywords = "flexible sensors, humidity sensors, polymer electrolytes, polyvinyl alcohol, porous ionic membranes",

author = "Tie Li and Lianhui Li and Hongwei Sun and Yan Xu and Xuewen Wang and Hui Luo and Zheng Liu and Ting Zhang",

note = "Publisher Copyright: {\textcopyright} 2017 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim",

year = "2017",

month = may,

day = "1",

doi = "10.1002/advs.201600404",

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T1 - Porous Ionic Membrane Based Flexible Humidity Sensor and its Multifunctional Applications

AU - Li, Tie

AU - Li, Lianhui

AU - Sun, Hongwei

AU - Xu, Yan

AU - Wang, Xuewen

AU - Luo, Hui

AU - Liu, Zheng

AU - Zhang, Ting

PY - 2017/5/1

Y1 - 2017/5/1

N2 - A highly flexible porous ionic membrane (PIM) is fabricated from a polyvinyl alcohol/KOH polymer gel electrolyte, showing well-defined 3D porous structure. The conductance of the PIM changes more than 70 times as the relative humidity (RH) increases from 10.89% to 81.75% with fast and reversible response at room temperature. In addition, the PIM-based sensor is insensitive to temperature (0–95 °C) and pressure (0–6.8 kPa) change, which indicates that it can be used as highly selective flexible humidity sensor. A noncontact switch system containing PIM-based sensor is assembled, and results show that the switch responds favorably to RH change caused by an approaching finger. Moreover, an attachable smart label using PIM-based sensor is explored to measure the water contents of human skin, which shows a great linear relationship between the sensitivity of the sensor and the facial water contents measured by a commercial reference device.

AB - A highly flexible porous ionic membrane (PIM) is fabricated from a polyvinyl alcohol/KOH polymer gel electrolyte, showing well-defined 3D porous structure. The conductance of the PIM changes more than 70 times as the relative humidity (RH) increases from 10.89% to 81.75% with fast and reversible response at room temperature. In addition, the PIM-based sensor is insensitive to temperature (0–95 °C) and pressure (0–6.8 kPa) change, which indicates that it can be used as highly selective flexible humidity sensor. A noncontact switch system containing PIM-based sensor is assembled, and results show that the switch responds favorably to RH change caused by an approaching finger. Moreover, an attachable smart label using PIM-based sensor is explored to measure the water contents of human skin, which shows a great linear relationship between the sensitivity of the sensor and the facial water contents measured by a commercial reference device.

KW - flexible sensors

KW - humidity sensors

KW - polymer electrolytes

KW - polyvinyl alcohol

KW - porous ionic membranes

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DO - 10.1002/advs.201600404

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VL - 4

JO - Advanced Science

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M1 - 1600404

ER -

Porous Ionic Membrane Based Flexible Humidity Sensor and its Multifunctional Applications

Abstract

Keywords

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