· Flocculation
Flocculation is the formation of light, downy groups of particles held together by weak Van der Waal's forces.
The basic alarm in developing a suitable suspension is to adequately control the rate of settling and ease of re dispersion, as well as, the prevention of caking the particles as a dense mass at the bottom of the bottle. The best approach is to achieve a controlled flocculation of the particles, where they appear as floccules or like tufts of wool with a loose fibrous structure. These particles settle rapidly, forming a loose adhering system with a large sediment tallness. In contrast to deflocculated particles, flocculated suspensions can always be re suspended with gentle agitation.
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