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The influence of exfoliated graphite on sensing properties of chitosan / PVA based ammonia sensors

Master of Science in Materials Engineering

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Bibliographic Details
Main Author: Nur Zuraihan, Abd Wahab
Other Authors: Irwana Nainggolan, Dr,
Format: Thesis
Language:English
Published: Universiti Malaysia Perlis (UniMAP) 2017
Subjects:
Chitosan
Chitin
Graphite
Volatile organic compounds
Polyvinyl alcohol (PVA)
Gas sensor
Online Access:http://dspace.unimap.edu.my:80/xmlui/handle/123456789/72435
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spelling my.unimap-724352021-10-14T01:15:55Z The influence of exfoliated graphite on sensing properties of chitosan / PVA based ammonia sensors Nur Zuraihan, Abd Wahab Irwana Nainggolan, Dr, Chitosan Chitin Graphite Volatile organic compounds Polyvinyl alcohol (PVA) Gas sensor Master of Science in Materials Engineering Chitosan was used as a sensing material for gas sensing applications. In order to nurture the chitosan properties as a sensing material, chitosan (CS) was blended with polyvinyl alcohol (PVA) and filled with exfoliated graphite (EG). The chitosan films, CS/PVA films and CS/PVA/EG films were characterized to study the effect of EG on microstructure and electrical properties of the composites films. The films casting method has been used to characterize the composite films. The characterization analysis was done using Ultra Violet-Visible (UV-VIS), Four Point Probe (Conductivity testing), X-Ray Diffraction (XRD), Fourier Electron Scanning Electron Microscopy (FESEM) and Fourier Transform Infrared Spectroscopy (FTIR). Chitosan with concentration 1.75 (w/v) % was blended with polyvinyl alcohol (PVA) with concentration 5.00 (v/v) % of ratio 95:5 ml and filled with exfoliated graphite (EG). The results showed that the addition of EG with concentration of 0.8 (w/v) % gives the highest conductivity value of CS/PVA/EG films. The CS/PVA/EG films sensor was deposited on the gold pattern electrode by using electrochemical deposition technique to fabricate the sensor for the ammonia detection. The best electrochemical deposition time and deposition voltage in this study were 6 minutes and 2.5 voltage to fabricate the films sensor. The optimum sensing properties were obtained with CS concentration of 1.75 (w/v) %, CS/PVA ratio of 95:5 ml with PVA concentration of 5.00 (v/v) % and EG concentration of 0.8 (w/v) % upon exposure to wet air. This parameter of CS films sensor and CS/PVA/EG films sensor was used to fabricate the films sensor to test upon exposure of ammonia gas. The CS film sensor and CS/PVA/EG film sensors were exposed to ammonia with different concentration i.e. 10 ppm, 20 ppm, 30 ppm, 40 ppm and 50 ppm to examine the sensing properties of the CS film sensor and CS/PVA/EG film sensors. 2017 2021-10-14T01:15:55Z 2021-10-14T01:15:55Z Thesis http://dspace.unimap.edu.my:80/xmlui/handle/123456789/72435 en Universiti Malaysia Perlis (UniMAP) Universiti Malaysia Perlis (UniMAP) School of Materials Engineering
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic Chitosan
Chitin
Graphite
Volatile organic compounds
Polyvinyl alcohol (PVA)
Gas sensor
spellingShingle Chitosan
Chitin
Graphite
Volatile organic compounds
Polyvinyl alcohol (PVA)
Gas sensor
Nur Zuraihan, Abd Wahab
The influence of exfoliated graphite on sensing properties of chitosan / PVA based ammonia sensors
description Master of Science in Materials Engineering
author2 Irwana Nainggolan, Dr,
author_facet Irwana Nainggolan, Dr,
Nur Zuraihan, Abd Wahab
format Thesis
author Nur Zuraihan, Abd Wahab
author_sort Nur Zuraihan, Abd Wahab
title The influence of exfoliated graphite on sensing properties of chitosan / PVA based ammonia sensors
title_short The influence of exfoliated graphite on sensing properties of chitosan / PVA based ammonia sensors
title_full The influence of exfoliated graphite on sensing properties of chitosan / PVA based ammonia sensors
title_fullStr The influence of exfoliated graphite on sensing properties of chitosan / PVA based ammonia sensors
title_full_unstemmed The influence of exfoliated graphite on sensing properties of chitosan / PVA based ammonia sensors
title_sort influence of exfoliated graphite on sensing properties of chitosan / pva based ammonia sensors
publisher Universiti Malaysia Perlis (UniMAP)
publishDate 2017
url http://dspace.unimap.edu.my:80/xmlui/handle/123456789/72435
_version_ 1724609904281387008
score 13.223943

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