Wettability of single fibres – beyond the contact angle approach

To know the wettability of fibres is useful to predict their adhesion potential to the matrices which they strengthen. The contact angle on a single fibre can characterise its wettability by the contacting liquid in a given environment. In this paper, the theoretical model proposed by Carroll (J Col...

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Bibliographic Details
Published in:International journal of adhesion and adhesives 1999-01, Vol.19 (4), p.303-314
Main Authors: Rebouillat, Serge, Letellier, Bertrand, Steffenino, Benoit
Format: Article
Language:English
Subjects:
Applied sciences
B. Fibres
C. Contact angles
D. Interphases
Exact sciences and technology
Fibers and threads
Forms of application and semi-finished materials
Polymer industry, paints, wood
Technology of polymers
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Summary:To know the wettability of fibres is useful to predict their adhesion potential to the matrices which they strengthen. The contact angle on a single fibre can characterise its wettability by the contacting liquid in a given environment. In this paper, the theoretical model proposed by Carroll (J Colloid Interface Sci 1976;57:488) and Yamaki and Katayama (J Appl Polym Sci 1975;19:2897) is reviewed. Using a modified version of their model and a modern image analysis approach, a computer assisted measurement of the inflection angle of the drop profile leads to a more accurate and faster calculation of the contact angle. Experiments on Kevlar ® fibre were conducted and statistics are presented. These provide a comparison between the traditional wetted length approach and the new one involving the inflection angle of the drop profile which appears to be a useful parameter for characterising fiber–liquid interactions of various wettability situations.
ISSN:0143-7496
1879-0127
DOI:10.1016/S0143-7496(99)00006-8