Comparative effect on constant and pulsed voltage application in electrophoretic deposition of submicron polystyrene latex (PSL) particles / Bashariah Basaruddin

Comparative effect on constant and pulsed voltage application in electrophoretic deposition of submicron polystyrene latex (PSL) particles / Bashariah Basaruddin

Electrophoretic mobility of polystyrene latex (PSL) particles in aqueous are influenced and interfered by gas formation during electrolysis when electric field is applied. Aqueous electrophoretic deposition (EPD) yields numerous advantages, however, it has several unsolved challenges such as parti...

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Main Author: Basaruddin, Bashariah Basaruddin
Format: Thesis
Language:English
Published: 2017
Subjects:
Electrocoating
Electrophoretic deposition
Online Access:https://ir.uitm.edu.my/id/eprint/89102/1/89102.pdf
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spelling my-uitm-ir.891022024-04-16T14:39:43Z Comparative effect on constant and pulsed voltage application in electrophoretic deposition of submicron polystyrene latex (PSL) particles / Bashariah Basaruddin 2017 Basaruddin, Bashariah Basaruddin Electrocoating. Electrophoretic deposition Electrophoretic mobility of polystyrene latex (PSL) particles in aqueous are influenced and interfered by gas formation during electrolysis when electric field is applied. Aqueous electrophoretic deposition (EPD) yields numerous advantages, however, it has several unsolved challenges such as particles aggregation, affecting the uniformity of the deposited layer. This thesis presents a conclusive study investigating both of electrolysis and EPD process. Firstly, the thesis studies the fundamental aspect of EPD in aqueous, which is the volume of bubbles formation during electrolysis under pulsed and continuous DC charging is investigated. Secondly, the effects of both charging method on the electrophoretic mobility of deposit particles and bubbles growth is investigated. Three different sizes of polystyrene latex (PSL); 600 nm, 300 nm and 100 nm were used in this experiment. During the study, the particles electrophoretic mobility and the gasses influences were recorded using the microscope when pulsed and continuous DC charging was applied. It was observed that the particles mobility was more uniform and indicates sharper distribution when pulsed DC charging was applied compared to continuous DC charging. This indicates that pulsed DC charging is an effective method to produce uniform particles deposition in comparison to continuous DC charging method. It was also found that the variation of particles velocity was attributable to large quantity of bubbles produced during the EPD interrupted the particles movements. Application of pulsed DC yielded a narrower distribution of particle velocity, ascribed to the lower quantity of bubbles. High velocity particles provides better momentum to resist the bubbles interferences. During the deposition, gas formation due to electrolysis was also successfully quantified via observation by microscope. It was found that bubbles growth was significantly reduced when pulsed DC is applied which minimal the particles mobility interference when migrating towards the electrode vicinity. It was also noticed that by increasing the velocity of the particles and minimizing the gas formation contributes to uniform particle deposition. 2017 Thesis https://ir.uitm.edu.my/id/eprint/89102/ https://ir.uitm.edu.my/id/eprint/89102/1/89102.pdf text en public masters Universiti Teknologi MARA (UiTM) Faculty of Chemical Engineering Abu Bakar, Noor Fitrah
institution Universiti Teknologi MARA
collection UiTM Institutional Repository
language English
advisor Abu Bakar, Noor Fitrah
topic Electrocoating
Electrophoretic deposition
spellingShingle Electrocoating
Electrophoretic deposition
Basaruddin, Bashariah Basaruddin
Comparative effect on constant and pulsed voltage application in electrophoretic deposition of submicron polystyrene latex (PSL) particles / Bashariah Basaruddin
description Electrophoretic mobility of polystyrene latex (PSL) particles in aqueous are influenced and interfered by gas formation during electrolysis when electric field is applied. Aqueous electrophoretic deposition (EPD) yields numerous advantages, however, it has several unsolved challenges such as particles aggregation, affecting the uniformity of the deposited layer. This thesis presents a conclusive study investigating both of electrolysis and EPD process. Firstly, the thesis studies the fundamental aspect of EPD in aqueous, which is the volume of bubbles formation during electrolysis under pulsed and continuous DC charging is investigated. Secondly, the effects of both charging method on the electrophoretic mobility of deposit particles and bubbles growth is investigated. Three different sizes of polystyrene latex (PSL); 600 nm, 300 nm and 100 nm were used in this experiment. During the study, the particles electrophoretic mobility and the gasses influences were recorded using the microscope when pulsed and continuous DC charging was applied. It was observed that the particles mobility was more uniform and indicates sharper distribution when pulsed DC charging was applied compared to continuous DC charging. This indicates that pulsed DC charging is an effective method to produce uniform particles deposition in comparison to continuous DC charging method. It was also found that the variation of particles velocity was attributable to large quantity of bubbles produced during the EPD interrupted the particles movements. Application of pulsed DC yielded a narrower distribution of particle velocity, ascribed to the lower quantity of bubbles. High velocity particles provides better momentum to resist the bubbles interferences. During the deposition, gas formation due to electrolysis was also successfully quantified via observation by microscope. It was found that bubbles growth was significantly reduced when pulsed DC is applied which minimal the particles mobility interference when migrating towards the electrode vicinity. It was also noticed that by increasing the velocity of the particles and minimizing the gas formation contributes to uniform particle deposition.
format Thesis
qualification_level Master's degree
author Basaruddin, Bashariah Basaruddin
author_facet Basaruddin, Bashariah Basaruddin
author_sort Basaruddin, Bashariah Basaruddin
title Comparative effect on constant and pulsed voltage application in electrophoretic deposition of submicron polystyrene latex (PSL) particles / Bashariah Basaruddin
title_short Comparative effect on constant and pulsed voltage application in electrophoretic deposition of submicron polystyrene latex (PSL) particles / Bashariah Basaruddin
title_full Comparative effect on constant and pulsed voltage application in electrophoretic deposition of submicron polystyrene latex (PSL) particles / Bashariah Basaruddin
title_fullStr Comparative effect on constant and pulsed voltage application in electrophoretic deposition of submicron polystyrene latex (PSL) particles / Bashariah Basaruddin
title_full_unstemmed Comparative effect on constant and pulsed voltage application in electrophoretic deposition of submicron polystyrene latex (PSL) particles / Bashariah Basaruddin
title_sort comparative effect on constant and pulsed voltage application in electrophoretic deposition of submicron polystyrene latex (psl) particles / bashariah basaruddin
granting_institution Universiti Teknologi MARA (UiTM)
granting_department Faculty of Chemical Engineering
publishDate 2017
url https://ir.uitm.edu.my/id/eprint/89102/1/89102.pdf
_version_ 1804889799546372096

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