Adhesion of Dust Particles to Common Indoor Surfaces in an Air-Conditioned Environment
Adhesion between dust particles and indoor surfaces can lead to negative effects on human health by triggering allergic and asthmatic reactions. In this study, adhesion forces of indoor office dust and activated carbon (AC, as model soot) particles to four common indoor materials (Al, Cu, PVC, a...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | en |
| Published: |
Taylor & Francis Group
2014
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| Subjects: | |
| Online Access: | http://ir.unimas.my/id/eprint/10252/1/Adhesion%20of%20Dust%20Particles%20to%20Common%20Indoor%20Surfaces%20in%20an%20Air-Conditioned%20Environment%20%28abstract%29.pdf http://ir.unimas.my/id/eprint/10252/ https://scholar.google.com.my/citations?view_op=view_citation&hl=en&user=KmdSVJMAAAAJ&citation_for_view=KmdSVJMAAAAJ:Wp0gIr-vW9MC |
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| Summary: | Adhesion between dust particles and indoor surfaces can lead
to negative effects on human health by triggering allergic and asthmatic
reactions. In this study, adhesion forces of indoor office dust
and activated carbon (AC, as model soot) particles to four common
indoor materials (Al, Cu, PVC, and glass) were measured
by colloidal probe atomic force microscopy. Chemical analysis of
office dust shows it is largely made up of oxygenated hydrophilic
organic carbon material. Both metal surfaces experienced weaker
dust and AC adhesion than PVC or glass by up to 2–12 times lower
primarily due to the presence of attractive electrostatic forces in the
latter two (non-conducting) surfaces. Dust and AC adhesion were
also highly sensitive to surface roughness, with an inverse relationship
between adhesion force and roughness due to the reduction in
contact area between the particle and a rougher material surface.
Capillary forces play only a minor or negligible role in dust and
AC surface adhesion. Adhesion models utilizing a purely van der
Waals approach such as the simple Hamaker model and modified
Rumpf’s model are insufficient to determine the actual particlesurface
contact radii and requires the accounting of non-van der
Waals forces to adhesion. |
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