New Filter Efficiency Tests Being Developed for the Doe

2009 ◽  
pp. 345-345-19
Author(s):  
Ronald C. Scripsick
Keyword(s):  
Filter Efficiency

Electrospun polyacrylonitrile/polyvinyl pyrrolidone composite nanofibrous membranes with high-efficiency PM2.5 filter

2020 ◽  
Vol 40 (6) ◽  
pp. 487-493
Author(s):  
Chen Wang ◽  
Kun Yan ◽  
Jun Wang ◽  
Siyu Chen ◽  
Jiaming Cui ◽  
...  
Keyword(s):  
Pore Structure ◽  
Composite Nanofibers ◽  
High Efficiency ◽  
Fine Particulate Matter ◽  
Polyvinyl Pyrrolidone ◽  
Indoor Dust ◽  
Mass Ratio ◽  
Filter Efficiency ◽  
Fine Particulate ◽  
Closed Pore

AbstractIn this research, we successfully fabricated a novel closed pore polyacrylonitrile (PAN)/polyvinyl pyrrolidone (PVP) composite nanofibrous membrane (PCNM) on the substrate of a commercial polypropylene window mesh. First, smooth and uniform PAN/PVP composite nanofibers (PCNs) were manufactured by blending PAN and PVP with a mass ratio of 5:5 during electrospinning. Subsequently, the prepared PCNs were hot pressed in a vacuum drying oven at a given temperature of 90°C. The morphology and filter efficiency of PCN and PCNM were investigated. It was found that hot-pressing treatment significantly affected the pore structure and orientation of PCNM, which contributed to its closed pore structure and good alignment. The filter efficiency results indicated that the hot-pressed PCNMs have excellent removal efficiency of up to 96.8% of fine particulate matter. This research demonstrates that PCNMs have potential as filters for indoor dust removal and will provide a new idea for the development of air filters.

Elemental modeling of adsorption filter efficiency for indoor air quality applications

2013 ◽  
Vol 66 ◽  
pp. 11-22 ◽  
Author(s):  
Razvan Stefan Popescu ◽  
Patrice Blondeau ◽  
Eric Jouandon ◽  
J.C. Costes ◽  
J.L. Fanlo
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Filter Efficiency ◽  
Modeling Of Adsorption

Determination of Air Filter Efficiency

2020 ◽  
pp. 111-117
Author(s):  
Debabrata Das ◽  
Debayan Das
Keyword(s):  
Air Filter ◽  
Filter Efficiency

scholarly journals Using surgical wrapping material for the fabrication of respirator masks

2020 ◽  
Author(s):  
Johanna H Meijer ◽  
Joric Oude Vrielink
Keyword(s):  
Personal Protective Equipment ◽  
Healthcare Professionals ◽  
Hospital Staff ◽  
Clinical Staff ◽  
Surgical Instruments ◽  
Protective Equipment ◽  
Bottom Up ◽  
Filter Efficiency

AbstractGiven the current shortage of respirator masks and the resulting lack of personal protective equipment for use by clinical staff, we examined bottom-up solutions that would allow hospitals to fabricate respirator masks that: (i) meet requirements in terms of filtering capacities, (ii) are easy to produce rapidly and locally, and (iii) can be constructed using materials commonly available in hospitals worldwide. We found that Halyard H300 material used for wrapping of surgical instruments and routinely available in hospitals, met these criteria. Specifically, three layers of material achieved a filter efficiency of 94%, 99%, and 100% for 0.3 μm, 0.5 μm, and 3.0 μm particles, respectively; importantly, these values are close to the efficiency provided by FFP2 and N95 masks. After re-sterilization up to 5 times, the filter’s efficiency remains sufficiently high for use as an FFP1 respirator mask. Finally, using only one layer of the material satisfies the criteria for use as a ‘surgical mask’. This material can therefore be used to help protect hospital staff and other healthcare professionals who require access to suitable masks but lack commercially available solutions.

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