Electrical Properties Selected Literature Data

Electrical conductivity in nanotube-polymer composites exhibits percolation-type behavior, where the presence of interconnected nanotube network results in a dramatic increase of the electrical conductivity. Physical parameters of composite materials such as electrical conductivity, percolation threshold v ), and critical exponent (t) have been intensively studied to achieve polymer-CNT conductive composites at low filler concentrations. However, as already mentioned, numerous studies show that the percolation threshold and conductivity depend strongly on the polymer type and synthesis method, aspect ratio of CNTs, disentanglement of CNT agglomerates, uniform spatial distribution of individual CNTs, and degree of alignment. 

A wide range of values for conductivity and percolation thresholds of CNT composites has been reported in the literature during the last decade, depending on the processing method, polymer matrix, and nanotube type. Recent review articles can be found in Refs [6,87,90]. In Table 10.2, selected research studies concerning the DC electrical properties of CNT-polymer composites are presented. Also, a comparison between the different types of polymeric matrices, CNTs type 

Matrix CNT type CNT weight fraction (wt%) Processing method Composite electrical conductivity (S/m) Vc (Wt%) t Reference 

HOPE SWCNTs 8 Fast crystallization from dilute solution w70 (8wt%) 0.13 3.54 [93] 

Matrix CNT type CNT weight Processing Composite Vc (Wt%) f Reference 

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