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Printed humidity sensor for packaging / ABIRAM MODEM

Swansea University Author: ABIRAM MODEM

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Abstract

Printed electronics is the process of developing electrical devices on different substrates by printing inks by various methods. Flexograhpic printing a Humidity sensor was investigated. Flexographic printing can be cost effective for volume production on label presses. In this research, conductive...

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Published: Swansea 2022
Institution: Swansea University
Degree level: Master of Research
Degree name: MSc by Research
Supervisor: Claypole, Timothy ; Lau, John
URI: https://cronfa.swan.ac.uk/Record/cronfa60286
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first_indexed 2022-06-20T17:05:09Z
last_indexed 2022-06-21T03:19:11Z
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spelling 2022-06-20T18:14:55.0962539 v2 60286 2022-06-20 Printed humidity sensor for packaging 2e35e3244f282be09235d94c0c295e03 ABIRAM MODEM ABIRAM MODEM true false 2022-06-20 Printed electronics is the process of developing electrical devices on different substrates by printing inks by various methods. Flexograhpic printing a Humidity sensor was investigated. Flexographic printing can be cost effective for volume production on label presses. In this research, conductive silver nano-particle ink with a Silver content of 50 (+/-2) Wt.% was used to develop an Interdigitated Electrode (IDE). The printed base Silver interdigitated electrodes had an average resistance of 11.96Ω with a standard deviation of 1.21 indicating that the Silver printed sensors were consistent in the print quality.Nafion (a sulfonated tetrafluoroethylene-based copolymer) resin solution with a 20 wt.% in lower aliphatic alcohols and water, was printed on top of the silver Interdigitated electrode as the active layer for the detection of the change in humidity. Substrate used for the experiment was white Polyethylene terephthalate (PET White) of 0.175mm thickness. The sensors were tested in a Humidity chamber over a range of 40-80% relative humidity at of 25◦C to ascertain the effective working of the design by measuring their resistivity and repeatability. When the resistance of the sensors was checked with Direct Current (DC), there was a change in the resistance. The formation of dendrites due to electro-chemical reactivity on the surface of the sensor was observed, which caused the sensors to short circuit and fail. When the sensors were tested with Alternating Current (AC), it limited the growth of dendrites and the sensors were self-consistent with a repeatability of resistance pattern, but there was variation in the range of resistance between the sensors, where few showed sensing activity that started at around 500 KΩ and others around 2000 KΩ at 40%RH (Relative Humidity). This proved that the materials used worked and showed potential in developing a humidity sensor via Flexographic printing, further worked is required to eliminate the Dendrites formation and to stabilize the range of resistance. E-Thesis Swansea Printing Technology, Printed Electronics, Sensors, Flexography 16 6 2022 2022-06-16 COLLEGE NANME COLLEGE CODE Swansea University Claypole, Timothy ; Lau, John Master of Research MSc by Research 2022-06-20T18:14:55.0962539 2022-06-20T18:01:46.5378441 College of Engineering Engineering ABIRAM MODEM 1 60286__24347__00788f7b2fe34785bc4ee3600a412890.pdf Modem_Abiram_R_MSc_Research_Thesis_Final_Redacted_Signature.pdf 2022-06-20T18:13:46.1946551 Output 42048738 application/pdf E-Thesis – open access true Copyright: The author, Abiram R. Modem, 2022. This thesis is released under the terms of a Creative Commons Attribution-Non Commercial No–Derivatives (CC-BY-NC-ND) license. Third party content is excluded for use under the license terms. true eng
title Printed humidity sensor for packaging
spellingShingle Printed humidity sensor for packaging
ABIRAM MODEM
title_short Printed humidity sensor for packaging
title_full Printed humidity sensor for packaging
title_fullStr Printed humidity sensor for packaging
title_full_unstemmed Printed humidity sensor for packaging
title_sort Printed humidity sensor for packaging
author_id_str_mv 2e35e3244f282be09235d94c0c295e03
author_id_fullname_str_mv 2e35e3244f282be09235d94c0c295e03_***_ABIRAM MODEM
author ABIRAM MODEM
author2 ABIRAM MODEM
format E-Thesis
publishDate 2022
institution Swansea University
college_str College of Engineering
hierarchytype
hierarchy_top_id collegeofengineering
hierarchy_top_title College of Engineering
hierarchy_parent_id collegeofengineering
hierarchy_parent_title College of Engineering
department_str Engineering{{{_:::_}}}College of Engineering{{{_:::_}}}Engineering
document_store_str 1
active_str 0
description Printed electronics is the process of developing electrical devices on different substrates by printing inks by various methods. Flexograhpic printing a Humidity sensor was investigated. Flexographic printing can be cost effective for volume production on label presses. In this research, conductive silver nano-particle ink with a Silver content of 50 (+/-2) Wt.% was used to develop an Interdigitated Electrode (IDE). The printed base Silver interdigitated electrodes had an average resistance of 11.96Ω with a standard deviation of 1.21 indicating that the Silver printed sensors were consistent in the print quality.Nafion (a sulfonated tetrafluoroethylene-based copolymer) resin solution with a 20 wt.% in lower aliphatic alcohols and water, was printed on top of the silver Interdigitated electrode as the active layer for the detection of the change in humidity. Substrate used for the experiment was white Polyethylene terephthalate (PET White) of 0.175mm thickness. The sensors were tested in a Humidity chamber over a range of 40-80% relative humidity at of 25◦C to ascertain the effective working of the design by measuring their resistivity and repeatability. When the resistance of the sensors was checked with Direct Current (DC), there was a change in the resistance. The formation of dendrites due to electro-chemical reactivity on the surface of the sensor was observed, which caused the sensors to short circuit and fail. When the sensors were tested with Alternating Current (AC), it limited the growth of dendrites and the sensors were self-consistent with a repeatability of resistance pattern, but there was variation in the range of resistance between the sensors, where few showed sensing activity that started at around 500 KΩ and others around 2000 KΩ at 40%RH (Relative Humidity). This proved that the materials used worked and showed potential in developing a humidity sensor via Flexographic printing, further worked is required to eliminate the Dendrites formation and to stabilize the range of resistance.
published_date 2022-06-16T04:20:23Z
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score 10.889718