The anisotropic structure of electro conductive leather studied by Van der Pauw method

Abstract

Determining the surface resistance of electro conductive refined natural leather materials is in the focus of this paper. Natural leather samples are initially transformed to conductive by applying chemical treatment process known as polymerization. Due to the existence of various techniques for measuring electrical resistance of conductive materials, we are focused on measuring surface resistance by arranging four electrodes in the edges of square leather samples, also known as Van der Pauw method. Improving the results accuracy, we use a multi-variant electrode placement over the sample edges. The result is the average of all results gained for different placements. Moreover, we use this electrode placement technique to analyse the anisotropy of conductive samples. The results of this research provide important knowledge about leather chemical treatment and its electrical proprieties.

Investigating the Influence on the Electro-Conductive Properties of Leather as a Result of Natural Aging

“…This method has been proven to be highly helpful for determining sheet resistance and is compatible with determining sheet resistance of leather that has been treated to conduct electricity [17]. This method is used in our previous research, to evaluate the surface resistance of electro-conductive treated leather samples [6][7][8]. As shown in Figure 2, four connections must be put on the conductive sample's corners to test its resistance using this approach.…”

“…For this research, two Tektronix DMM4050 Multimeters, a DC Power supply GP4303D and four measurement probes are used [8].…”

“…For the first time, their approach was used to assess the changes in the electrical resistivity of leather after chemical treatments to make it electro-conductive. Moreover, Shabani et al published research on the surface resistance of natural leather, electroconductively treated [8]. Additionally, to surface resistance measurements, the anisotropy of conductive https://doi.org/10.31881/TLR.2023.086 leather was also examined.…”

Research on the Planar Electrical Anisotropy of Conductive Woven Fabrics

“…[20,21] The van der Pauw method also enables the assessment of the quality of layers printed on substrates [16] or leather chemical treatment and its electrical properties. [22] Identification of electrical anisotropy of knitted fabric is important from the point of view of its possible application. [11,12,15] The higher value of resistance in the chosen direction can be reflected in the wider changes in resistance values caused by DOI: 10.1002/adem.202300019…”

“…[ 20,21 ] The van der Pauw method also enables the assessment of the quality of layers printed on substrates [ 16 ] or leather chemical treatment and its electrical properties. [ 22 ]…”