Dialon may have numerous applications. For example, it can be coated on plastic material to improve the air tightness. For example,
the interior of PET bottles can be coated with dialon by inserting the container with an electrode that echoes with the exterior electrode in radio frequency (e.g. 15.6 MHz). The decomposed gas (e.g. acetylene) will coat the plastic to form DLC. The DLC sealed PET would not react with almost any liquid. Dialon would be a much better coating than ordinary DLC so the coated container can be used to store beverages or beers. Figure 10.12 shows the effectiveness of sealing a permeable wall by coating with DLC.
Table 10.2. Adherence of platelets on different materials
Substrate Density (No/cm2)
Silicon 500 millions
Another example is to coat dialon on biological implants. The fluorine atoms will repel water so the body fluid cannot stain the surface of the implant. Dialon coated heart valves and vein stents are the least likely to adhere bood platelets that may hinder their functions. Table 10.2 compares the densities of platelets that are adhered on various substrates immersed in blood.
Dialon may also be coated on the exterior surface of piston or the interior surface of cylinder in an engine. In this case the hydrophobic surface is highly oil hungry (lipophilic) so it can be
firmly attached with a thin film of non-polar oil. This in situ lubricant can prevent frictional rubbing between the moving parts. As a result, not only the engine life may be extended, but also the running efficiency (e.g. higher gas mileage may be expected from an automobile). Figure 10.13 illustrates the oil retention effect of fluorine containing DLC.
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