Development of novel polymer coating for FBG based relative humidity sensing

•We report the development of a polymer coating for fibre Bragg grating based humidity sensors.•PMMA and its co-polymers were investigated leading to structural modifications of a synthesised polyetherimide coating with a measured Bragg wavelength shift of 1.45 pm/%rh, an improvement over unmodified...

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Bibliographic Details
Published in:Sensors and actuators. A. Physical. 2016-10, Vol.249, p.217-224
Main Authors: Swanson, A.J., Raymond, S.G., Janssens, S., Breukers, R.D., Bhuiyan, M.D.H., Lovell-Smith, J.W., Waterland, M.R.
Format: Article
Language:English
Subjects:
Bragg grating
Humidity sensor
Polymer coating
Time response
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Summary:•We report the development of a polymer coating for fibre Bragg grating based humidity sensors.•PMMA and its co-polymers were investigated leading to structural modifications of a synthesised polyetherimide coating with a measured Bragg wavelength shift of 1.45 pm/%rh, an improvement over unmodified polyetherimide.•The commercially available P84 polyimide (Evonik) was investigated and a Bragg wavelength shift of 5.29 pm/%rh measured.•A modified polyimide is now in development. This paper presents the development of a polymer coating for fibre Bragg grating based humidity sensors. PMMA and its co-polymers were investigated leading to structural modifications of a synthesised polyetherimide coating with a measured Bragg wavelength shift of 1.45 pm/%rh, an improvement over unmodified polyetherimide. The commercially available P84 polyimide (Evonik) was investigated and a Bragg wavelength shift of 5.29 pm/%rh measured. A modified polyimide is now in development.
ISSN:0924-4247
1873-3069
DOI:10.1016/j.sna.2016.08.034