Study of Micrometer Particle Detachment on Different Surfaces

In an effort to identify particle initial motion prior liftoff interactions of micrometer glass beads (10–100 μm) on glass, ceramic, and hardwood substrates were investigated experimentally. Particles were deposited on the lower surface of a 10 cm2 wind tunnel by gravitational settling. Air flows were imposed from an open entrance at average velocities up to 16 m/s. Individual particle trajectories obtained by high-speed imaging reveal three different types of motion: rolling/bouncing (saltation caused by the movement of hard particles over an uneven surface in a turbulent flow of air), immediate liftoff (particles completely leave the surface with no or minimal initial rolling/bouncing) and complex motion (particles travel with rolling/bouncing motion on the surface for a certain distance before final liftoff). Surface roughness significantly affects the particle initial motion prior to liftoff.

The majority of particle trajectories from the glass substrate were parallel to the surface with complex motion. Hardwood substrates took the longest time for initial particle movement (t >1 s) causing a more rapid liftoff. The ceramic substrate showed the most rolling/bouncing motion, for 80% of the particles.

The detachment percentage initially follows an exponentially increasing trend for a period of ∼1 s, followed by a plateau phase for a period of 5 s. Changing the velocity, substrate, and particle size significantly affects particle detachment. Incorporating the different types of particle motion prior to liftoff into detachment mode models, and understanding how their relative contributions change with different particle and substrate materials, can potentially yield improved predictive capabilities.

micrometer particle technology
micrometer particle technology

 

The second regime has much lower resuspension rate(s) (Ibrahim 2004). In many of the currently reported experiments, almost half the material removed during the entire duration of those experiments was lost from the surface within the first 10 s (Nicholson 1993). However, most of the existing data were obtained months to years after initial deposition. These long-term data sets are poor surrogates for short-term emergency response scenarios (Kim et al. 2010).

The important factor in the handling of dust is the fact that the particles will adhere to each other and to solid surfaces. Jordan (1954) raised the importance of changing the surface roughness for particle detachment. Qian and Ferro (2008) concluded that hard floor could be a better choice than carpet for reducing particle resuspension. Lohaus et al. (2008) found that air velocities of more than 5 m/s were required to resuspend 50% of 3.2 μm particles from linoleum and wood surfaces.

In general, high turbulence and high velocity conditions minimized the differences between materials (Mukai et al. 2009). Goldasteh et al. (2010) showed that detachment from wood flooring was easier than from linoleum flooring and they suggested that the difference in the adhesion force (surface energy) and the nature of the micro roughness is the main reason for such behavior.

 

Microbead NIST Traceable Particle Size Standard, 1.50µm

64040-15 15ml
EUR 452

Microbead NIST Traceable Particle Size Standard, 1.75µm

64045-15 15ml
EUR 452

Microbead NIST Traceable Particle Size Standard, 2.00µm

64050-15 15ml
EUR 452

Microbead NIST Traceable Particle Size Standard, 2.50µm

64055-15 15ml
EUR 452

Microbead NIST Traceable Particle Size Standard, 3.00µm

64060-15 15ml
EUR 452

Microbead NIST Traceable Particle Size Standard, 3.50µm

64065-15 15ml
EUR 452

Microbead NIST Traceable Particle Size Standard, 4.00µm

64070-15 15ml
EUR 452

Microbead NIST Traceable Particle Size Standard, 5.00µm

64080-15 15ml
EUR 452

Microbead NIST Traceable Particle Size Standard, 6.00µm

64090-15 15ml
EUR 452

Microbead NIST Traceable Particle Size Standard, 7.00µm

64100-15 15ml
EUR 452

Microbead NIST Traceable Particle Size Standard, 8.00µm

64110-15 15ml
EUR 452

Microbead NIST Traceable Particle Size Standard, 9.00µm

64120-15 15ml
EUR 452

MicroTools for Manipulation: Kit 2; 20 durable and flexible tools for crystal manipulation. MicroTip: Two each of 25 and 50 micrometer diameter tips. MicroSpoon: Two small and one large size. MicroChisel: Two small and one large size. MicroLasso: Two s

T2-L25-A1 20 TOOLS
EUR 118
Description: MicroTools for Manipulation: Kit 2; 20 durable and flexible tools for crystal manipulation.MicroTip: Two each of 25 and 50 micrometer diameter tips. MicroSpoon: Two small and one large size.MicroChisel: Two small and one large size. MicroLasso: Two small and one large size. MicroSieve: Two small, two medium and one large size. MicroSaw: Two saws.

Fluorescent Particle

FP-3045-5 5 mL
EUR 303.6
Description: Please reffer to the technical data sheet for more detail information for this item. Our dedicated team would be happy to assist you via live chat, email or phone.

Fluorescent Particle Kit

FB-2552-6K 6x1 mL
EUR 554.4
Description: Please reffer to the technical data sheet for more detail information for this item. Our dedicated team would be happy to assist you via live chat, email or phone.

Fluorescent Particle Kit

FB-3558-6K 6x1 mL
EUR 554.4
Description: Please reffer to the technical data sheet for more detail information for this item. Our dedicated team would be happy to assist you via live chat, email or phone.

Fluorescent Particle Kit

FA-2552-6K 6x1 mL
EUR 554.4
Description: Please reffer to the technical data sheet for more detail information for this item. Our dedicated team would be happy to assist you via live chat, email or phone.

Fluorescent Particle Kit

FA-3558-6K 6x1 mL
EUR 554.4
Description: Please reffer to the technical data sheet for more detail information for this item. Our dedicated team would be happy to assist you via live chat, email or phone.

Fluorescent Particle Kit

FX-3552-6K 6x1 mL
EUR 432
Description: Please reffer to the technical data sheet for more detail information for this item. Our dedicated team would be happy to assist you via live chat, email or phone.

Fluorescent Particle Kit

FX-3552-9K 9X1 mL
EUR 675.6
Description: Please reffer to the technical data sheet for more detail information for this item. Our dedicated team would be happy to assist you via live chat, email or phone.

Nano Fluorescent Particle

NFPPS-0152-5 5 mL
EUR 261.6
Description: Please reffer to the technical data sheet for more detail information for this item. Our dedicated team would be happy to assist you via live chat, email or phone.

Nano Fluorescent Particle

NFPPS-0252-5 5 mL
EUR 225.6
Description: Please reffer to the technical data sheet for more detail information for this item. Our dedicated team would be happy to assist you via live chat, email or phone.

Nano Fluorescent Particle

NFPPS-0552-5 5 mL
EUR 225.6
Description: Please reffer to the technical data sheet for more detail information for this item. Our dedicated team would be happy to assist you via live chat, email or phone.

Nano Fluorescent Particle

NFPPS-0852-5 5 mL
EUR 225.6
Description: Please reffer to the technical data sheet for more detail information for this item. Our dedicated team would be happy to assist you via live chat, email or phone.

Nano Fluorescent Particle

NFPPS-1552-5 5 mL
EUR 225.6
Description: Please reffer to the technical data sheet for more detail information for this item. Our dedicated team would be happy to assist you via live chat, email or phone.

Fluorescent Particle Slide

FPS-10040 mL
EUR 213.6
Description: Please reffer to the technical data sheet for more detail information for this item. Our dedicated team would be happy to assist you via live chat, email or phone.

Fluorescent Particle Slide

FPS-10052 mL
EUR 213.6
Description: Please reffer to the technical data sheet for more detail information for this item. Our dedicated team would be happy to assist you via live chat, email or phone.

Fluorescent Particle Slide

FPS-10056 mL
EUR 213.6
Description: Please reffer to the technical data sheet for more detail information for this item. Our dedicated team would be happy to assist you via live chat, email or phone.

Fluorescent Particle Slide

FPS-10057 mL
EUR 213.6
Description: Please reffer to the technical data sheet for more detail information for this item. Our dedicated team would be happy to assist you via live chat, email or phone.

Fluorescent Particle Slide

FPS-10062 mL
EUR 213.6
Description: Please reffer to the technical data sheet for more detail information for this item. Our dedicated team would be happy to assist you via live chat, email or phone.

Fluorescent Particle Slide

FPS-10070 mL
EUR 213.6
Description: Please reffer to the technical data sheet for more detail information for this item. Our dedicated team would be happy to assist you via live chat, email or phone.

Fluorescent Particle Slide

FPS-100M4 mL
EUR 352.8
Description: Please reffer to the technical data sheet for more detail information for this item. Our dedicated team would be happy to assist you via live chat, email or phone.

Fluorescent Particle Slide

FPS-100M4B mL
EUR 352.8
Description: Please reffer to the technical data sheet for more detail information for this item. Our dedicated team would be happy to assist you via live chat, email or phone.