The percolation threshold is the point where the level of conductivity is increased abruptly. Numbers of researchers tried to prepared composite with good dispersion of the filler in the matrix material to get percolation threshold at low vol%.
Why low vol% of filler is more important that higher vol % ? Please open the discussion.
There are several advantageous for low percolation threshold nanocomposite structures. First, low percolation means using less conductive fillers to get the desired electrical conductivity, which can reduce the cost of fabrication. Second, high volume percentage of filler materials can dramatically change the mechanical properties of the matrix (make them stiff). Therefore, low percolation threshold can greatly preserve the properties of the matrix. For example, in wearable electronic field, it is highly demanded to have nanocomposite structures with high electrical conductivity plus mechanical compliance and stretchability.
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