EXAKT Three Roll Mills with significant advantages in nanotechnology
Carbon Nanotubes
Three roll mills have already been implemented successfully in nano technology (e.g., the lotus effect). One relatively new application is processing carbon nanotubes. Carbon nanotubes are nanoscale tubes that are harder than steel. They conduct electricity and improve the mechanical properties of polymers, which makes them especially particularly useful in nano-composite materials (e.g., epoxy resin filled with carbon nanotubes).
For these properties to be effective, the agglomerates in which they are found must be dissolved and dispersed evenly in the polymer. Based on their operation, our three roll mills meet these high standards.
High shearing forces
The high surface of carbon nanotubes makes it difficult to disperse them in epoxy resins. Due to the powerful shearing forces of the three roll mill, the dispersion of the agglomerates for the carbon nanotubes is ideal. The carbon nanotubes remain undamaged and the requisite high aspect ratio (length to diameter) is retained. The surface area of the carbon nanotubes wet by epoxy resin continues to grow. As a result, the viscosity rises steadily from 10 cPoise to as much as 100.000 cPoise.
Continuous dispersion
The special ability of the three roll mill to spread products across a wide range of viscosities is especially important with carbon nanotubes. Dispersion increases steadily throughout the process, alongside viscosity, which results in continuous improvement of product quality.
Processing very small quantities
At the beginning of an R&D phase, several attempts are necessary to determine the correct composition of the end product. The three roll mill reduces development costs, especially with expensive raw materials like carbon nanotubes, since it also allows processing of very small quantities – with minimal loss of material.
Experience with epoxy resin and carbon nanotubes can be applied to many materials with nanoparticles fillers.
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»Critical consideration of the potential of carbon nanotubes«
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»Influence of nano-modification«
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»Influence of different carbon-nanotubes«


