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Authors
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Bellmann, C. ; Petong, N. ; Caspari, A. ; Jenschke, W. ; Simon, F. ; Grundke, K.
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Title
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Surface analytics of particles
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Date
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18.04.2006
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Number
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12516
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Abstract
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Normally, commercial coatings are filled with small particles in the form of pigments or fillers. The general properties of surface coating systems significantly depend on the stability of such systems, and on the interaction forces between polymer matrix and particle. The knowledge about the mechanism of these interaction forces enables us to control the lacquer properties. One of the well known physical models of colloid stability is given by the Derjaguin, Landau, Verwey and Overbeek (DLVO) Theory. In this case, it is necessary to know the electrokinetic potential of the used particles. In this paper, the authors demonstrate two new methods of measuring the electrokinetic potential of such particles: namely streaming potential measurements with a special cell and electro-osmosis.<br />The basic requirement to combine pigment particles with the polymer matrix is a good wetting of these particles by the polymer melt. It is possible to assess the wetting properties from a knowledge of the surface tension of both components. The method of capillary penetration was used to determine the surface tension of these particles. In this paper, the authors will discuss some parameters that should be considered for the interpretation of capillary penetration experiments.
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Publisher
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Surface Coatings International / Part B: Coatings Transactions
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Wikidata
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Citation
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Surface Coatings International / Part B: Coatings Transactions 89 (2006) 69-75
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DOI
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http://www.ingentaconnect.com/content/occa/ct/2006/00000089/00000001/art00009
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