Porous Polyurethane Foam for Use as a Particle Collection Substrate in a Nanoparticle Respiratory Deposition Sampler

Details

• Personal Author:
  Anthony, T. Renée ; Grassian VH ; Mines LWD ; Mudunkotuwa IA ; Park JH ; Peters TM
• Description:
  Porous polyurethane foam was evaluated to replace the eight nylon meshes used as a substrate to collect nanoparticles in the Nanoparticle Respiratory Deposition (NRD) sampler. Cylindrical (25 mm diameter by 40 mm deep) foam with 100 pores per inch was housed in a 25-mm-diameter conductive polypropylene cassette cowl compatible with the NRD sampler. Pristine foam and nylon meshes were evaluated for metals content via elemental analysis. The size-selective collection efficiency of the foam was evaluated using salt (NaCl) and metal fume aerosols in independent tests. Collection efficiencies were compared to the nanoparticulate matter (NPM) criterion and a semi-empirical model for foam. Changes in collection efficiency and pressure drop of the foam and nylon meshes were measured after loading with metal fume particles as measures of substrate performance. Substantially less titanium was found in the foam (0.173 ug sampler-1) compared to the nylon mesh (125 ug sampler-1), improving the detection capabilities of the NRD sampler for titanium dioxide particles. The foam collection efficiency was similar to that of the nylon meshes and the NPM criterion (R2 = 0.98, for NaCl), although the semi-empirical model underestimated the experimental efficiency (R2 = 0.38). The pressure drop across the foam was 8% that of the nylon meshes when pristine and changed minimally with metal fume loading (approximately 19 mg). In contrast, the pores of the nylon meshes clogged after loading with approximately 1 mg metal fume. These results indicate that foam is a suitable substrate to collect metal (except for cadmium) nanoparticles in the NRD sampler. [Description provided by NIOSH]
• Subjects:
  Aerosols Air Pollutants, Occupational Chlorine Metals Occupational Health Particulate Matter Safety Titanium
• Keywords:
  Aerosol Particles Chlorides Diffusion Analysis Filter Fabrics Filter Materials Filters Fumes Materials Testing Metal Compounds Metal Fumes Metallic Compounds Nanoparticles Nanotechnology Particle Diameter Particle Size Particulates Performance Tests Polyurethane Foams Porous Materials Samplers Sodium Compounds Testing Equipment Titanium Dioxide Ultrafine Particles

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• ISSN:
  0278-6826
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Iowa ; OSHA Region 7
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  497-506
• Volume:
  50
• Issue:
  5
• NIOSHTIC Number:
  nn:20050614
• Citation:
  Aerosol Sci Technol 2016 May; 50(5):497-506
• Contact Point Address:
  Thomas M. Peters, Department of Occupational and Environmental Health, University of Iowa, 105 River St., S331 CPHB, Iowa City, IA 52242, USA
• Email:
  Thomas-m-peters@uiowa.edu
• CAS Registry Number:
  Sodium chloride (CAS RN 7647-14-5) ; Titania (CAS RN 13463-67-7)
• Federal Fiscal Year:
  2016
• Performing Organization:
  University of Iowa
• Peer Reviewed:
  True
• Start Date:
  20050701
• Source Full Name:
  Aerosol Science and Technology
• End Date:
  20290630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:845b6b30168108706bec314b2df463250447a5d804f132560a2ff89699fc493243efa0b0216562359a33dff24bea175bf3f3c05d9096181a9521f018d996922c
• Download URL:
  https://stacks.cdc.gov/view/cdc/210888/cdc_210888_DS1.pdf
• File Type:
  [PDF - 946.20 KB ]