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

Posted by Doug_Huffman 3 months ago to Technology
19 comments | Share | Flag

Medical Express .com “[ ... ]
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.
[ ... ]”

A Surface Coating that Rapidly Inactivates SARS-CoV-2

ACS Appl. Mater. Interfaces 2020, XXXX, XXX, XXX-XXX
Publication Date:July 13, 2020
https://doi.org/10.1021/acsami.0c11425
Copyright © 2020 American Chemical Society

Abstract

SARS-CoV-2, the virus that causes the disease COVID-19, remains viable on solids for periods of up to one week, so one potential route for human infection is via exposure to an infectious dose from a solid. We have fabricated and tested a coating that is designed to reduce the longevity of SARS-CoV-2 on solids. The coating consists of cuprous oxide (Cu2O) [CAS 1317-39-1] particles bound with polyurethane. After one hour on coated glass or stainless steel, the viral titer was reduced by about 99.9% on average compared to the uncoated sample. An advantage of a polyurethane-based coating is that polyurethane is already used to coat a large number of everyday objects. Our coating adheres well to glass and stainless steel, as well as everyday items that people may fear to touch during a pandemic, such as a doorknob, a pen, and a credit card keypad button. The coating performs well in the cross-hatch durability test and remains intact and active after 13 days immersed in water, or after exposure to multiple cycles of exposure to virus and disinfection.

http://Sci-hub.tw hops all paywalls
SOURCE URL: https://medicalxpress.com/news/2020-07-hour-professor-surface-coating-inactivates.html


Add Comment

FORMATTING HELP

All Comments Hide marked as read Mark all as read

  • Posted by $ Commander 3 months ago
    Commonly known as VC-17 in the boating industry. Commonly used for algal growth inhibition. And it was very common in household and commercial fixtures....entry handles for doors being one specific application.
    Reply | Mark as read | Best of... | Permalink  
    • Posted by $ jbrenner 3 months ago
      Copper oxide coatings were outlawed in the boating industry a few years ago by environmentalists who correctly said that life forms that wanted to eat such coatings were getting into the food chain and sterilizing harbors. The copper oxide works extremely well, perhaps too well.
      Reply | Mark as read | Parent | Best of... | Permalink  
      • Posted by $ Commander 3 months ago
        VC-17 is still available. Used a new quart to paint Athena in April. It is mixed at approx. 1 cup of micronized copper per 3 of volatile evaporative.

        I'll use the following link for info as these folks have skin in the game.
        https://www.paint.org/coatingstech-ma...

        Historically, also, brass and bronze had been used extensively for door and window hardware. Daily multiple contacts for anyone who was active. Copper and Zinc, incidentally scuffed onto the skin and transferred to the face / nasal passages may have been an incidental deterrent to the viral and bacterial infections. You have an extensive understanding beyond mine; then why, are we seeing +2 valence elementals, highly metabolizable in reasonable proportion, as solution (no pun intended) to bacterial and viral conditions?
        Reply | Mark as read | Parent | Best of... | Permalink  
        • Posted by $ jbrenner 3 months ago
          Copper is still used, although it is being phased out. Tributyltin on the other hand was banned completely for the same reasons that I mentioned above.
          Reply | Mark as read | Parent | Best of... | Permalink  
          • Posted by $ Commander 3 months ago
            And what Is is the Was of what shall Be. Ideas that manifest in physical form, as Capitalist endeavor, providing apparent value at the time, only lacking understanding of long term future implication.

            I saw a Neil deGrass Tyson interview in which Neil asked the interviewer, in the midst of a fairly in depth explanation of nuclear particle acceleration;
            "What will be the last words of humanity?"
            Interviewer: I don't know.
            Neil: Let's try it this way......
            Reply | Mark as read | Parent | Best of... | Permalink  
        • Posted by $ jbrenner 3 months ago
          The bacteria (and for that matter algae in swimming pools) form a negatively charged biofilm that resists mass transfer. The positively charged ions de-aggregate the biofilm.
          Reply | Mark as read | Parent | Best of... | Permalink  
          • Posted by $ Commander 3 months ago
            Does this make sense as corollary?
            Over 30 years in machine shop with at least 15% of materials containing CU and ZN and almost 100% dry machining. I've very rarely had any respiratory distress regarding flu or cold. The times I was afflicted seem to be associated with predominantly administrative activity. We have had a very low incidence, severity and duration of respiratory illness across the employee base as well, despite substantive "outbreak" and exposure in the given area.
            I'm just thinking in the realm of possibility vs probability.
            Reply | Mark as read | Parent | Best of... | Permalink  
          • Posted by $ jbrenner 3 months ago
            The editor of Biofouling works in my building, and I sit on a couple of his students' dissertation committees.
            Reply | Mark as read | Parent | Best of... | Permalink  
            • Posted by 3 months ago
              This is a claim of authority, an acquaintance, name dropping?

              I use ethanol to denature biofilms, and then hot water to continue the denaturing as I rinse it away.
              Reply | Mark as read | Parent | Best of... | Permalink  
              • Posted by $ jbrenner 3 months ago
                I suppose you're right about the name dropping. I do collaborate on the biofouling work, however, so I am not a second hander. They come to me to do the zeta potential analysis to measure the surface charge on their biofilms, so this is quite literally right up my alley. In fact, I have just started a company that sells UV LED-based disinfection products to complement the nanotech coatings that the referenced article is concerned with. While I write this, I am taking a break from pre-recording lectures for my nanotechnology lecture class.
                Reply | Mark as read | Parent | Best of... | Permalink  
  • Posted by 3 months ago
    Unfortunately I found one commercial product only containing cuprous oxide, Scott’s Palm Food and then only a trace.

    So one will have to formulate the coating oneself.

    US$100 / kilogram
    https://www.amazon.com/Copper-Oxide-C...

    I clean and sanitize household sanitary surfaces - bathroom, kitchen, scullery - daily, sanitize with Dimethyl Benzyl (and Ethylbenzyl) Ammonium Chloride wipes.
    Reply | Mark as read | Best of... | Permalink  
    • Posted by $ Commander 3 months ago
      Be very careful with the micronized copper. Twice I've experienced mild copper poisoning through respiratory ingestion. A really bad hangover minus the fun. Once was inhalation while opening packet for bottom paint and the other was sanding the bottom of boat before new application.
      Reply | Mark as read | Parent | Best of... | Permalink  
  • Posted by DrZarkov99 3 months ago
    Copper has been used as an antibiotic and antiviral for decades, but its use has been tainted in the media because it gets lumped in with the proponents of silver solution as a magic cure-all. Copper bracelets are unfortunately also associated with "magic" well being, especially when teamed with magnets. These things tend to cloud the reality of the real ionizing effect of the metal that performs as an antibacterial and antiviral element.
    Reply | Mark as read | Best of... | Permalink  
  • Posted by Casebier 3 months ago
    This would be a remarkable product as much of the scientific community and the community at large are coming to realize that wearing masks does little or nothing to provide COVID-19 protection as the virus penetrates almost all mask materials and contaminates (infects) the masks in the process. A surface coating that kills the virus would be almost a miracle. The vast majority of transmissions are now believed from infected individuals, including an asymmetric infected individuals, leaving the virus on items they touch and uninfected individuals touching the same spot and then their mouth, nose or eyes. Consequently, the best mask protection comes from it serving as a reminder not to touch our faces.
    Reply | Mark as read | Best of... | Permalink  

FORMATTING HELP

  • Comment hidden. Undo