SYMPOSIA PAPER Published: 01 January 1993

A Photometric Study of Dilute Microcapsule Suspensions


Dilute suspensibility of solids, of great importance to the users of suspension concentrate formulations, is a complex subject. In order to better understand the behavior of dilute microcapsule suspensions, a photometric method has been used to quantitatively measure their sedimentation as a function of time. Applied to eight different microcapsule formulations, this method has shown that 1) microcapsule settling rates are not linear; 2) shell wall structure largely influences the degree of microcapsule flocculation and hence settling rates; and 3) in many cases, suspension and resuspension are inversely related.

Author Information

Stern, AJ
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Developed by Committee: E35
Pages: 145–154
DOI: 10.1520/STP20189S
ISBN-EB: 978-0-8031-5221-2
ISBN-13: 978-0-8031-1439-5