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A study of protective clothing to understand nanoparticle exposure and surface contamination

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dc.contributor.authorMaksot, Aigerim, author
dc.contributor.authorKipper, Matt J., advisor
dc.contributor.authorTsai, Candace S., advisor
dc.contributor.authorLi, Yan V., committee member
dc.date.accessioned2021-09-06T10:25:18Z
dc.date.available2023-09-03T10:25:18Z
dc.date.issued2021
dc.description.abstractIn this study, we investigated engineered nanoparticle (ENP) release associated with the contamination of personal protective clothing during the human activities of the worker wearing the ENP-contaminated protective clothing and evaluated the relative ENP retention to each used fabric type. The release of ENPs as airborne nanoparticles can cause inhalation exposure, which is the route of exposure of most concern to cause adverse health effects. The methods used were associated with four different fabric materials of contaminated laboratory coats (cotton, polypropylene, polyester/cotton blend, and Tyvek®) and three ENPs (Al2O3, carbon black and CNT). Two types of tests were performed: contamination and release experiments under two different durations (30 minutes and 6 hours of release processes). The magnitude of contamination and particle release were investigated in this study by measuring the number concentration increase and the weight change on fabric pieces. This study simulated real-life occupational exposure scenarios and was performed in cleanroom environments to investigate the effect of background aerosols on the measurements. Concentrations were measured using particle spectrometers for diameters from 10 nm to 10 μm. Collected aerosol particles and contaminated fabric surfaces were characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM), and elemental carbon analysis. The magnitude of particle release from contaminated lab coat fabric was found to vary by the type of fabric material; cotton fabric showed the highest level of particle release, followed by polyester cotton, Tyvek® and polypropylene. Moreover, Tyvek® fabric was determined as the best fabric for trapping Al2O3 and carbon black ENPs indicating less resuspension of particles and highest mass change per unit mass after aerosolization and release processes. Two dominant forces responsible for ENP adhesion on the surface of the fabric were theoretically calculated to be van der Waals force and capillary force. To sum up, Tyvek® fabric is considered the most reliable fabric against ENPs, but not durable enough to wear for the long term compared with other fabrics.
dc.format.mediumborn digital
dc.format.mediummasters theses
dc.identifierMaksot_colostate_0053N_16780.pdf
dc.identifier.urihttps://hdl.handle.net/10217/233763
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado State University. Libraries
dc.relation.ispartof2020-
dc.rightsCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.
dc.subjectcarbon black
dc.subjectlab coat
dc.subjectaluminum oxide
dc.subjectresuspension
dc.subjectcarbon nanotube (CNT)
dc.titleA study of protective clothing to understand nanoparticle exposure and surface contamination
dc.typeText
dcterms.embargo.expires2023-09-03
dcterms.embargo.terms2023-09-03
dcterms.rights.dplaThis Item is protected by copyright and/or related rights (https://rightsstatements.org/vocab/InC/1.0/). You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
thesis.degree.disciplineChemical and Biological Engineering
thesis.degree.grantorColorado State University
thesis.degree.levelMasters
thesis.degree.nameMaster of Science (M.S.)

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