Acid base contributions to interfacial free energy: self-consistency considerations |
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| Affiliation: | 1. Centre national de la recherche scientifique, Ecole nationale supérieure des mines de Paris, Centre des matériaux P.M.-Fourt, BP 87, 91003 Évry cedex, France;2. IRSID — Groupe USINOR, service CMO, Voie Romaine, BP 30320, 57283 Maizières-les-Metz cedex, France;1. School of Mechanical Engineering, Dalian Jiaotong University, PR China;2. Centre for Precision Manufacturing, DMEM, University of Strathclyde, Glasgow G1 1XJ, UK;3. School of Mechanical Engineering, Shandong University, PR China;4. Department of Surgery, Glasgow Royal Infirmary, UK |
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| Abstract: | The evaluation of interfacial free energies is a subject of much discussion. Of recent times, the role of acid/base interactions has been much debated and a mathematical model devised by van Oss et al. is now commonly used. In this work, we study several polymers using recognised probe liquids and, exploiting an extended matrix analysis, obtain values of solid surface characteristics in agreement with literature values. However, by ‘inverting’ the method, and using accepted solid surface characteristics to ‘rederive’ surface free energy parameters for probe liquids, inconsistencies become apparent. Despite the conceptual interest of acid/base interactions, clearly the mathematical formulation of van Oss et al. is incomplete and further development is required. |
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