Dynamic contact angle measurement on materials with an unknown wet perimeter

Whilst contact angle measurements obtained using the Wilhelmy balance technique are accurate and reproducible for planar surfaces, their use for characterizing particulate materials is highly dependent upon accurate knowledge of the wet perimeter. This communication suggests that the approach of Pep...

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Bibliographic Details
Published in:	International journal of pharmaceutics Vol. 282; no. 1; pp. 189 - 191
Main Author:	Muster, Tim H.
Format:	Journal Article
Language:	English
Published:	Amsterdam Elsevier B.V 10-09-2004 Elsevier
Subjects:	Algorithms Biological and medical sciences Chemical Phenomena Chemistry, Pharmaceutical Chemistry, Physical Contact angle General pharmacology Medical sciences Pharmaceutical technology. Pharmaceutical industry Pharmacology. Drug treatments Powders Surface Properties Wet perimeter Wettability Wilhelmy technique Wettability Contact angle Wet perimeter Wilhelmy technique Measurement Pharmaceutical technology
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Summary:	Whilst contact angle measurements obtained using the Wilhelmy balance technique are accurate and reproducible for planar surfaces, their use for characterizing particulate materials is highly dependent upon accurate knowledge of the wet perimeter. This communication suggests that the approach of Pepin et al. [Int. J. Pharm. 152 (1997) 1] for wet perimeter determination using non-polar liquids may lead to erroneous conclusions. Alternative approaches for wet perimeter determination are suggested.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0378-5173 1873-3476
DOI:	10.1016/j.ijpharm.2004.06.019