The Interaction and Lift-Off Forces of an Atomic Force Microscope Tip from Single Fibers Extracted from Protective Clothing Fabric

Details

• Personal Author:
  Reifenberger RG ; Tsai CS-J
• Description:
  The widespread use of engineered nanoparticles (ENPs) poses a potential health hazard to humans, especially to those involved in either nanoparticle manufacturing or the usage and assembly of a final product. In this study, we performed systematic force vs distance experiments (F(z)) using an atomic force microscope (AFM) on fibers commonly used in street clothing and protective laboratory clothing to better characterize the relevant interaction forces between engineered nanoparticles (ENPs) and the contacted fabric fibers. The intent of this study is to identify those factors that influence the interaction of ENPs with fabrics with an aim to improve the efficacy of protective clothing against ENP exposure and mitigate potential health risks. A approx. 14 nm diameter AFM SiOx tip (with nanoscale radius of curvature) is considered as an effective oxide ENP. Features present (or absent) in a well-executed F(z) AFM experiment provide a fingerprint that distinguishes the relevant forces and interaction mechanisms in play. Measurements of F(z) as a function of relative humidity were also performed to assess the importance of thin surface water layers in binding nanometer-size oxide ENPs to a fabric fiber. The F(z) data indicate the dominant mechanism for adhesion of the oxide tip to the various fabric fibers (cotton, Tyvek (HD polyethylene), polypropylene, and polyester) can be attributed to a van der Waals interaction. The analysis provides no evidence for long-range electrostatic forces or capillary-induced adhesion of the AFM tip to the fibers studied. [Description provided by NIOSH]
• Subjects:
  Occupational Health Particulate Matter Personal Protective Equipment Protective Clothing Safety
• Keywords:
  Fabrics Fibers Materials Testing Nanoparticles Personal Protective Equipment PPE Protective Clothing Surface Properties
• ISSN:
  0743-7463
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  California ; Colorado ; Indiana ; OSHA Region 5 ; OSHA Region 8 ; OSHA Region 9
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  40
• Issue:
  29
• NIOSHTIC Number:
  nn:20069994
• Citation:
  Langmuir 2024 Jul; 40(29):14788-14797
• Contact Point Address:
  Candace Su-Jung Tsai, Department of Environmental Health Sciences, Fielding School of Public Health, University of California, Los Angeles, California 90095, United States
• Email:
  candacetsai@ucla.edu
• Federal Fiscal Year:
  2024
• Performing Organization:
  Colorado State University
• Peer Reviewed:
  True
• Start Date:
  20190915
• Source Full Name:
  Langmuir
• End Date:
  20210914
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:36def8563a0ec697289232169c212a8c95a98ff95a5f4b31a00aa1f2a2d10b482e8429e953713eb1ca2e1071e4fd39b64a8f51fb9c14b712dfb60032bad4477b
• Download URL:
  https://stacks.cdc.gov/view/cdc/208305/cdc_208305_DS1.pdf
• File Type:
  [PDF - 4.02 MB ]