Baek, Song Yi;
(2022)
Phosphate Based Glass in Developing Anti-Scale Devices with Antimicrobial Properties.
Doctoral thesis (Ph.D), UCL (University College London).
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Abstract
Previous study allowed us to focus on the most effective anti scaling glass composition of 50P2O5 ∙10Na2O ∙ 40CaO (mol%) showing the best anti scaling property with the controlled release of the desired P3O93- and P3O105- phosphates. Achieving anti scaling properties with an increase of more than 1000% in humidifier running time using hard water (ca. 320 ppm), previously broken due to scale formation within 2 months. Primary studies carried out was glass dissolution, where tap and deionized water was used to observe dissolution and ion release in water with presence and absence of ions. Followed by dynamic and static tests to understand how the flow of liquid will effect dissolution and ion release. Extreme temperature and humidity experiments were carried out to test the glass’ durability trying to understand how the condition in which the glasses are kept will affect its overall performance. Glass and its following results were characterized with thermal gravitational analysis (TGA), differential thermal analysis (DTA), scanning electron microscopy (SEM), energy dispersive x-ray (EDX), x-ray photoelectron spectroscopy (XPS) and 31P nuclear magnetic resonance (NMR) with dissolution properties analysed using ion chromatography, inductively coupled plasma-optical emission spectroscopy (ICP-OES). The glass chosen by this thesis showed great durability in extreme temperatures and humidity. Finally, extending on its controlled ion release and anti scaling property; the addition of copper showed antimicrobial property with 50P2O5 ∙10Na2O ∙20CaO ∙20CuO (mol%) showing best performance. Addition of copper decreased P3O93- and increased P3O105- phosphate release showing change in glass bulk structure with addition of Cu2+, making the glass more ideal as it allows for the glass not to excessively release phosphates whilst achieving antimicrobial property. The glass was also pulled into fibres with its possible application into cooperation into filters also showing excellent antimicrobial property. In conclusion, the glasses studied exhibited steady release of anti scaling phosphates in all conditions making it an excellent candidate for industrial uses in all hard water environments with effective antibacterial and antiviral property.
| Type: | Thesis (Doctoral) |
|---|---|
| Qualification: | Ph.D |
| Title: | Phosphate Based Glass in Developing Anti-Scale Devices with Antimicrobial Properties |
| Open access status: | An open access version is available from UCL Discovery |
| Language: | English |
| Additional information: | Copyright © The Author 2022. Original content in this thesis is licensed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) Licence (https://creativecommons.org/licenses/by-nc-nd/4.0/). Any third-party copyright material present remains the property of its respective owner(s) and is licensed under its existing terms. Access may initially be restricted at the author’s request. |
| UCL classification: | UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Eastman Dental Institute UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10152953 |
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