Forums
New posts
Search forums
What's new
New posts
New media
New media comments
Latest activity
Classifieds
Media
New media
New comments
Search media
Log in
Register
What's New?
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Navigation
Install the app
Install
More Options
Advertise with us
Contact Us
Close Menu
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
The Water Cooler
General Discussion
N95 mask cleaning ?
Search titles only
By:
Reply to Thread
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="yukonjack" data-source="post: 3347429" data-attributes="member: 2939"><p>UV light is not recommended for use in sterilizing N95 masks.</p><p></p><p><span style="font-size: 12px"><strong><strong>Q3: Can the masks be treated using radiation or UV?</strong></strong></span></p><p><strong>A: </strong>Radiation sources such as gamma rays or UV light are commonly used for the sterilization of materials, but they have the potential to degrade the PP material by the attacking the lone electrons pairs in the CH3 side group on the backbone of its molecular chains, leading to the dissipation of the charges. However, the degree of PP decomposition depends on the radiation and UV intensity as well as the exposure time. For example, PP will be totally degraded and become brittle after three months of exposure to sunlight during the summer. More experimentation is needed to determine the effect of ionizing radiation on the filtration efficiency of mask media at the duration and intensity needed to kill coronavirus.</p><p></p><p>The three web links below provide evidence of some small degree of strength loss but insignificant charge decay after UV sterilization at a certain dose and exposure time.</p><p></p><p><a href="https://t.co/8aPfLMEskF?amp=1" target="_blank">https://t.co/8aPfLMEskF?amp=1</a></p><p></p><p><a href="https://pubmed.ncbi.nlm.nih.gov/25806411/" target="_blank">https://pubmed.ncbi.nlm.nih.gov/25806411/</a></p><p></p><p><a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4699414/" target="_blank">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4699414/</a></p><p></p><p>The following link shows the loss of charges and strength after using gamma irradiation to sterilize the mask.</p></blockquote><p></p>
[QUOTE="yukonjack, post: 3347429, member: 2939"] UV light is not recommended for use in sterilizing N95 masks. [SIZE=3][B][B]Q3: Can the masks be treated using radiation or UV?[/B][/B][/SIZE] [B]A: [/B]Radiation sources such as gamma rays or UV light are commonly used for the sterilization of materials, but they have the potential to degrade the PP material by the attacking the lone electrons pairs in the CH3 side group on the backbone of its molecular chains, leading to the dissipation of the charges. However, the degree of PP decomposition depends on the radiation and UV intensity as well as the exposure time. For example, PP will be totally degraded and become brittle after three months of exposure to sunlight during the summer. More experimentation is needed to determine the effect of ionizing radiation on the filtration efficiency of mask media at the duration and intensity needed to kill coronavirus. The three web links below provide evidence of some small degree of strength loss but insignificant charge decay after UV sterilization at a certain dose and exposure time. [URL]https://t.co/8aPfLMEskF?amp=1[/URL] [URL]https://pubmed.ncbi.nlm.nih.gov/25806411/[/URL] [URL]https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4699414/[/URL] The following link shows the loss of charges and strength after using gamma irradiation to sterilize the mask. [/QUOTE]
Insert Quotes…
Verification
Post Reply
Forums
The Water Cooler
General Discussion
N95 mask cleaning ?
Search titles only
By:
Top
Bottom