Ambient Medium on Adhesive Force

Influence of Ambient Temperature and Particle Contact Time on Adhesion. 

Of the various factors affecting adhesive forces, we may mention the temperature of the ambient medium, the presence of adsorbable substances in this medium and on the contact surfaces, the extent to which the system is evaluated, and the time of contact between the particles and surface. 

Let us examine in more detail the influence of ambient temperature on adhesion. When dust is deposited from air, the temperature of the medium surrounding the dust-covered surface and the temperature of the contiguous bodies themselves may be anywhere from - 30 to +40°C.  

In Fig. IV. 11, the adhesive force is shown as a function of the ambient temperature. It must be noted that, in determining the adhesion by centrifuging (curves 1 and 2), the dust was deposited at the indicated temperature in a ther- 

In these results obtained by the use of the pulse technique, the influence of air humidity was eliminated hence, the rise in adhesive force with increasing ambient temperature can only be explained by a change taking place in the properties of the contiguous bodies. 

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