In one hour, surface coating inactivates virus that causes COVID-19


Date:
July 15, 2020
Source:
Virginia Tech
Summary:
Researchers have developed a surface coating that, when painted
on common objects, inactivates SARS-CoV-2, the virus that causes
COVID-19.



FULL STORY ==========================================================================
Door knobs, light switches, shopping carts. Fear runs rampant nowadays
when it comes to touching common surfaces because of the rapid spread
of the coronavirus.


==========================================================================
A Virginia Tech professor has found a solution.

Since mid-March, William Ducker, a chemical engineering professor,
has developed a surface coating that when painted on common objects, inactivates SARS-CoV-2, the virus that causes COVID-19.

"The idea is when the droplets land on a solid object, the virus within
the droplets will be inactivated," Ducker said.

Since mid-April, Ducker has been working with Leo Poon, a professor and researcher at the University of Hong Kong's School of Public Health, to
test the film's success at inactivating the virus. Their research was
published July 13 in ACS Applied Materials & Interfaces, a scientific
journal for chemists, engineers, biologists, and physicists.

The results of the tests have been outstanding, Ducker said. When the
coating is painted on glass or stainless steel, the amount of virus is
reduced by 99.9 percent in one hour, compared to the uncoated sample.



==========================================================================
"One hour is the shortest period that we have tested so far, and tests
at shorter periods are ongoing," Ducker said.

His expectation is that his team can inactivate the virus in
minutes. Results have shown that the coating is robust. It does not
peel off after being slashed with a razor blade. It also retains its
ability to inactivate the virus after multiple rounds of being exposed
to the SARS-CoV-2 virus and then disinfection or after being submerged
in water for a week, based on the tests.

If the project's success continues, it is a significant discovery in
fighting the virus' spread.

"Everybody is worried about touching objects that may have the
coronavirus," said Ducker, who recalled that his wife, in March,
questioned whether she should sit on a park bench during the pandemic. "It would help people to relax a little bit." Already, Ducker's research was focused on making films that kill bacteria. As the COVID-19 virus began
to spread to the United States a few months ago, Ducker asked himself
"Why not make a coating that can eradicate a virus, rather than bacteria?"
"We have to use our chemical knowledge and experience of other viruses
to guess what would kill it [SARS-CoV-2]," Ducker said.



========================================================================== Virginia Tech granted essential personnel status to Ducker, his two PhD.

chemical engineering graduate students -- Saeed Behzadinasab and Mohsen
Hossein -- and Xu Feng from the university's Department of Chemistry
so that they could enter campus labs to make the film and test its
properties.

"It was an interesting experience," Ducker said. "Almost the entire
campus was shut down, and we were like ghosts wandering the empty halls
of Goodwin Hall.

But it was very exciting to have such a clear goal. I know that it was
a difficult time for many people who were bored, unhappy, or scared. We
were just focused on making a coating." Next, he needed to find someone
who could test the coating's effectiveness.

Through an internet search, Ducker found Poon, who is known for his work studying SARs-CoV-1, which was the virus that caused the SARS outbreak
in 2003 and 2004. Poon has been active in the fight against SARS-CoV-2.

For Poon's tests, Ducker and the graduate students spread three different
kinds of coatings on glass and stainless steel. Then, they shipped the
samples to Poon.

Now, Ducker said he hopes to attract funding in order to mass produce
the film.

To be sure, the film doesn't replace other safety measures that people
should take to stop the spread of the coronavirus, such as handwashing, physical distancing, and wearing a mask.

Even so, "people won't have to worry as much about touching objects,"
Ducker said. "It will be both practical and reducing fear."

========================================================================== Story Source: Materials provided by Virginia_Tech. Original written by
Jenny Kincaid Boone.

Note: Content may be edited for style and length.


========================================================================== Journal Reference:
1. Saeed Behzadinasab, Alex Chin, Mohsen Hosseini, Leo L. M. Poon,
William
A. Ducker. A Surface Coating that Rapidly Inactivates
SARS-CoV-2. ACS Applied Materials & Interfaces, 2020; DOI:
10.1021/acsami.0c11425 ==========================================================================

Link to news story: https://www.sciencedaily.com/releases/2020/07/200715131254.htm

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