Enhancing refractive index of sol-gel coatings for polymeric substrates

Inorganic colloids TiO2 and ZnO have been successfully prepared using different “bottom up” techniques, such as Sol-gel and Solvo-thermal processes. Various characterization techniques such as XRD, DLS were employed to study the crystal phase, particle size and zeta-potential. It was discovered t...

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Main Author: Zheng, Yuanhuan.
Other Authors: Chen Zhong
Format: Final Year Project
Language:English
Published: 2009
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Online Access:http://hdl.handle.net/10356/16889
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-168892023-03-04T15:32:29Z Enhancing refractive index of sol-gel coatings for polymeric substrates Zheng, Yuanhuan. Chen Zhong School of Materials Science and Engineering A*STAR SIMTech DRNTU::Engineering Inorganic colloids TiO2 and ZnO have been successfully prepared using different “bottom up” techniques, such as Sol-gel and Solvo-thermal processes. Various characterization techniques such as XRD, DLS were employed to study the crystal phase, particle size and zeta-potential. It was discovered that TiCl4/Benzyl alcohol and ZnAC2/MeOH processes gave the smallest particle sizes of 44.97nm and 295.3nm for TiO2 and ZnO colloids respectively, while LTDRP technique produce phase pure Rutile Titania. Optical characterizations such as ellipsometry and UV-VIS spectroscopy were also conducted; to investigate the impact of colloid and coating parameters on the optical and mechanical performances of the coatings. From experimental results, it was concluded that average transmittance and refractive index of the coatings, decreased with increased in coating thickness, crystal phase, particle size and colloid concentration; while hardness of coating was dependent solely on the thickness of the thin film. To date, the highest refractive index coating was prepared using 1g of Rutile Titania with particle size of 73.78nm in a GLYMO/TEOS matrix. The properties achieved were refractive index of 1.695, average transmittance of 89.35% and a hardness of 2H. Bachelor of Engineering (Materials Engineering) 2009-05-28T08:43:32Z 2009-05-28T08:43:32Z 2009 2009 Final Year Project (FYP) http://hdl.handle.net/10356/16889 en Nanyang Technological University 54 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering
spellingShingle DRNTU::Engineering
Zheng, Yuanhuan.
Enhancing refractive index of sol-gel coatings for polymeric substrates
description Inorganic colloids TiO2 and ZnO have been successfully prepared using different “bottom up” techniques, such as Sol-gel and Solvo-thermal processes. Various characterization techniques such as XRD, DLS were employed to study the crystal phase, particle size and zeta-potential. It was discovered that TiCl4/Benzyl alcohol and ZnAC2/MeOH processes gave the smallest particle sizes of 44.97nm and 295.3nm for TiO2 and ZnO colloids respectively, while LTDRP technique produce phase pure Rutile Titania. Optical characterizations such as ellipsometry and UV-VIS spectroscopy were also conducted; to investigate the impact of colloid and coating parameters on the optical and mechanical performances of the coatings. From experimental results, it was concluded that average transmittance and refractive index of the coatings, decreased with increased in coating thickness, crystal phase, particle size and colloid concentration; while hardness of coating was dependent solely on the thickness of the thin film. To date, the highest refractive index coating was prepared using 1g of Rutile Titania with particle size of 73.78nm in a GLYMO/TEOS matrix. The properties achieved were refractive index of 1.695, average transmittance of 89.35% and a hardness of 2H.
author2 Chen Zhong
author_facet Chen Zhong
Zheng, Yuanhuan.
format Final Year Project
author Zheng, Yuanhuan.
author_sort Zheng, Yuanhuan.
title Enhancing refractive index of sol-gel coatings for polymeric substrates
title_short Enhancing refractive index of sol-gel coatings for polymeric substrates
title_full Enhancing refractive index of sol-gel coatings for polymeric substrates
title_fullStr Enhancing refractive index of sol-gel coatings for polymeric substrates
title_full_unstemmed Enhancing refractive index of sol-gel coatings for polymeric substrates
title_sort enhancing refractive index of sol-gel coatings for polymeric substrates
publishDate 2009
url http://hdl.handle.net/10356/16889
_version_ 1759857253667569664