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01-03-2022, 05:07 PM
Gena Soh
PUBLISHED FEB 22, 2022, 6:28 PM SGT
SINGAPORE - Researchers at the Nanyang Technological University (NTU) say they have created a coating that can stop lenses from fogging faster than the blink of an eye.
When applied to plastic lenses, the coating can spread water droplets in 93 milliseconds. This dispersion of the droplets into a uniform film prevents fogging.
An average blink lasts about 100 milliseconds.
......
While anti-fogging coatings have been developed for industrial applications, such as on solar panels, widespread adoption has been hampered by durability issues
......
prior coatings could not withstand washing and had to be reapplied regularly due to poor adhesion between the plastic surface and the coating.
Furthermore, they took a long time to apply and were prone to surface contamination by dirt or bacteria, demanding regular cleaning or replacement.
......
these problems will be greatly reduced with the new coating that can be fabricated and applied quickly, "taking under an hour" to apply.
The team's findings were published last December in Applied Surface Science, the highest ranked materials science journal internationally.
......
this film is expected to last a long time, said Prof Chen, the co-principal investigator of the study.
"On surveillance cameras under normal conditions, this film can be estimated to last a few months to a year," he added.
The coating has other beneficial properties, such as being anti-reflective.
It also has a superior visible light transmittance of up to 89 per cent on a regular plastic lens, about 5 per cent better than the same lens without a coating.
This makes the film particularly suitable for consumer eye-glasses, and Prof Chen estimates it could last for as long as "several years".
https://www.straitstimes.com/singapore/e...ped-by-ntu
PUBLISHED FEB 22, 2022, 6:28 PM SGT
SINGAPORE - Researchers at the Nanyang Technological University (NTU) say they have created a coating that can stop lenses from fogging faster than the blink of an eye.
When applied to plastic lenses, the coating can spread water droplets in 93 milliseconds. This dispersion of the droplets into a uniform film prevents fogging.
An average blink lasts about 100 milliseconds.
......
While anti-fogging coatings have been developed for industrial applications, such as on solar panels, widespread adoption has been hampered by durability issues
......
prior coatings could not withstand washing and had to be reapplied regularly due to poor adhesion between the plastic surface and the coating.
Furthermore, they took a long time to apply and were prone to surface contamination by dirt or bacteria, demanding regular cleaning or replacement.
......
these problems will be greatly reduced with the new coating that can be fabricated and applied quickly, "taking under an hour" to apply.
The team's findings were published last December in Applied Surface Science, the highest ranked materials science journal internationally.
......
this film is expected to last a long time, said Prof Chen, the co-principal investigator of the study.
"On surveillance cameras under normal conditions, this film can be estimated to last a few months to a year," he added.
The coating has other beneficial properties, such as being anti-reflective.
It also has a superior visible light transmittance of up to 89 per cent on a regular plastic lens, about 5 per cent better than the same lens without a coating.
This makes the film particularly suitable for consumer eye-glasses, and Prof Chen estimates it could last for as long as "several years".
https://www.straitstimes.com/singapore/e...ped-by-ntu
