TY - JOUR
T1 - The Evolution of Silica Nanoparticle-polyester Coatings on Surfaces Exposed to Sunlight
AU - Truong, Vi Khanh
AU - Stefanovic, Miljan
AU - Maclaughlin, Shane
AU - Tobin, Mark
AU - Vongsvivut, Jitraporn
AU - Al Kobaisi, Mohammad
AU - Crawford, Russell J.
AU - Ivanova, Elena P.
PY - 2016/10/11
Y1 - 2016/10/11
N2 - Corrosion of metallic surfaces is prevalent in the environment and is of great concern in many areas, including the military, transport, aviation, building and food industries, amongst others. Polyester and coatings containing both polyester and silica nanoparticles (SiO2NPs) have been widely used to protect steel substrata from corrosion. In this study, we utilized X-ray photoelectron spectroscopy, attenuated total reflection infrared micro-spectroscopy, water contact angle measurements, optical profiling and atomic force microscopy to provide an insight into how exposure to sunlight can cause changes in the micro-and nanoscale integrity of the coatings. No significant change in surface microtopography was detected using optical profilometry, however, statistically significant nanoscale changes to the surface were detected using atomic force microscopy. Analysis of the X-ray photoelectron spectroscopy and attenuated total reflection infrared micro-spectroscopy data revealed that degradation of the ester groups had occurred through exposure to ultraviolet light to form COO·,-H2C·,-O·,-CO· radicals. During the degradation process, CO and CO2 were also produced.
AB - Corrosion of metallic surfaces is prevalent in the environment and is of great concern in many areas, including the military, transport, aviation, building and food industries, amongst others. Polyester and coatings containing both polyester and silica nanoparticles (SiO2NPs) have been widely used to protect steel substrata from corrosion. In this study, we utilized X-ray photoelectron spectroscopy, attenuated total reflection infrared micro-spectroscopy, water contact angle measurements, optical profiling and atomic force microscopy to provide an insight into how exposure to sunlight can cause changes in the micro-and nanoscale integrity of the coatings. No significant change in surface microtopography was detected using optical profilometry, however, statistically significant nanoscale changes to the surface were detected using atomic force microscopy. Analysis of the X-ray photoelectron spectroscopy and attenuated total reflection infrared micro-spectroscopy data revealed that degradation of the ester groups had occurred through exposure to ultraviolet light to form COO·,-H2C·,-O·,-CO· radicals. During the degradation process, CO and CO2 were also produced.
KW - Engineering
KW - Issue 116
KW - Microscale topography
KW - Nanoscale topography
KW - Nanotechnology
KW - Silica nanoparticle-polyester coatings
KW - Sunlight exposure
KW - Surface chemistry
KW - Surface topography
UR - http://www.scopus.com/inward/record.url?scp=84992529953&partnerID=8YFLogxK
UR - http://purl.org/au-research/grants/ARC/IH130100017
U2 - 10.3791/54309
DO - 10.3791/54309
M3 - Article
C2 - 27768041
AN - SCOPUS:84992529953
SN - 1940-087X
VL - 2016
JO - Journal of Visualized Experiments
JF - Journal of Visualized Experiments
IS - 116
M1 - e54309
ER -