ILO Home
Go to the home page
Site map | Contact us Franšais | Espa˝ol

CISDOC database

Document ID (ISN)111324
CIS number 10-0851
ISSN - Serial title 1545-9624 - Journal of Occupational and Environmental Hygiene
Year 2011
Convention or series no.
Author(s) Gao P., Jaques P.A., Hsiao T.C., Shepherd A., Eimer B.C., Yang M., Miller A., Gupta B., Shaffer R.
Title Evaluation of nano- and submicron particle penetration through ten nonwoven fabrics using a wind-driven approach
Bibliographic information Jan. 2011, Vol.8, p.13-22. Illus. 25 ref.
Abstract This study focused on the design and characterization of a method for evaluating the performance of materials used in protective clothing. Ten nonwoven fabrics were selected, and physical properties including fiber diameter, fabric thickness, air permeability, porosity, pore volume and pore size were determined. Each fabric was sealed flat across the wide opening of a cone-shaped penetration cell that was then housed in a recirculation aerosol wind tunnel. The flow rate naturally driven by wind through the fabric was measured, and the sampling flow rate of the Scanning Mobility Particle Sizer used to measure the downstream particle size distribution and concentrations was then adjusted to minimize filtration effects. Results show that particle penetration increased with increasing face velocity, and penetration also increased with increasing particle size up to about 300 to 500nm. Penetrations measured by the wind-driven method were lower than those obtained with the filtration method for most of the fabrics selected, and the relative penetration performances of the fabrics were very different due to the vastly different pore structures.
Descriptors (primary) equipment testing; fabrics for protective clothing
Descriptors (secondary) nanoparticles; particle size; filtration efficiency; reliability; description of technique
Document type D - Periodical articles
Subject(s) Personal protection
Broad subject area(s) Chemical safety
Browse category(ies) Personal protection
Protective clothing