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Automatic determination of the zeta potential - SurPASS
Automatic determination of the zeta potential - SurPASS
Which are the adhesive properties of a plastic material? How will inorganic and organic materials adhere? Is a material suited for an artificial implant? In the laboratory, with the aid of the SurPASS from Anton Paar, you will find answers to these and other questions on the surface characteristics of solid state bodies. This new electro kinetic analyzer will determine the zeta potential of the surfaces of macroscopic solids of almost any dimension and shape, e.g. on flat samples, powders or fiber stoppers. The analysis is automatic, interference free, and due to the high sensitivity, the reproducibility of the results is unachieved. One of the many typical applications is the quantification of the zeta potential of a specific surface treatment, for example the activation of the adhesive properties of a plastic. The surfaces of polymers are known for their low wettability and poor adhesiveness of lacquer pigments. In order to improve the varnishing properties and adhesion of paints on plastic objects, they are subject to a pretreatment, e.g. plasma-treatment or scarfing. The efficiency of this pretreatment may be monitored by measuring the zeta potential. But the SurPASS also may be used directly in the production of plastic pieces. The traditional production materials are replaced more recently by composite materials, which combine the excellent firmness of one material with the low weight of another. Glass or carbon fibers are used in composite materials as strengthening components. With an appropriate modification of the surface of these inorganic fibers, they achieve the necessary compatibility with the organic matrix in which they are embedded. Again, the zeta potential is an reliable parameter to characterize the coating with a silane compound as an adhesive intermediate.

Anton Paar, Austria (05/03/2008)
Mark NTL307-40




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