A model for the relative environmental stability of a series of polyimide capacitance humidity sensors

Ralston, A.R.K.; Klein, Carl F.; Thoma, Paul E.; Denton, Denice D.

doi:10.1016/s0925-4005(97)80011-1

Cited by 56 publications

(30 citation statements)

References 2 publications

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“…Polymers such as polyimide (PI) [2][3][4][5], polymethyl metacrylate (PMMA) [6][7][8] (PET) [9] and polysulfone (PSF) [5,10,11] are some of the materials employed in capacitive humidity sensors but the material used most of the time in industrial applications is cellulose acetate butyrate (CAB). Indeed, CABs have been known for several years to be suitable polymers for capacitive humidity sensors [6,10,12].…”

Section: Methodsmentioning

confidence: 99%

A capacitive humidity sensor using cross-linked cellulose acetate butyrate

Ducéré

Bernès

Lacabanne

2005

Sensors and Actuators B: Chemical

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Section: Methodsmentioning

confidence: 99%

A capacitive humidity sensor using cross-linked cellulose acetate butyrate

Ducéré

Bernès

Lacabanne

2005

Sensors and Actuators B: Chemical

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“…In case of Kapton film, hydrolysis effect alters its internal electrical polarization which effectively manifests permittivity change. In [24], hysteresis analysis for Kapton film is thoroughly investigated. It shows linear repeatability for Kapton film.…”

Section: Hysteresis Analysismentioning

confidence: 99%

Polyvinyl-Alcohol (Pva)-Based Rf Humidity Sensor in Microwave Frequency

Amin¹,

Karmakar²,

Winther‐Jensen³

2013

PIER B

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Abstract-A highly sensitive, passive relative humidity (RH) sensor using polyvinyl-alcohol (PVA) dielectric film is presented. For the first time, PVA is investigated in microwave RF sensing devices for low cost, high resolution and accurate chipless RH sensor realization. Comparative study with traditional humidity sensing Kapton polymer is presented to validate superior performance of PVA film. Results are presented for two different passive high Q resonators to validate sensing performance in wide applications. Moreover, a new sensing parameter is described to investigate sensitivity measurement through resonance frequency and Q factor variation. The RH sensor has the potential to be integrated with mm and µm-wave high frequency passive RFID for ubiquitous sensing.

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“…Usage of a water-swelling polymer as a sensitive layer over interdigitated electrodes that changes both conductivity and thickness with moisture absorption is discussed in [82]. The environmental stability and moisture effects related to various polyimide films, including Kapton, Upilex, and HQDEA/4-BDAF, are investigated in depth in [133]. Humidity detection in solar panel encapsulations with interdigital electrodes screen printed over glass and Tedlar films was accomplished by electrochemical impedance spectroscopy [93].…”

Section: A Humidity and Moisture Sensingmentioning

confidence: 99%