Structural, electrical, and electromagnetic properties of cotton fabrics coated with polyaniline and polypyrrole

Abstract

In this study, the structural, electrical, and electromagnetic properties of cotton fabrics coated with polyaniline (PAni) and polypyrrole (PPy) were investigated and compared. For the aims, anilin and pyrrole were used as monomers, and in situ polymerization on cotton fabric by chemical oxidative polymerization was performed. After production, the structural properties of the fabrics were determined with Fourier transform infrared spectroscopy and X-ray diffraction. In addition, ultraviolet (UV) permeability, tensile strength, colorfastness, and electrical and electromagnetic measurements of the fabric samples were carried out. The resistance values of the cotton fabrics coated with PAni and PPy were found to be 350 and 512 X, respectively. The average electromagnetic shielding efficiency and average absorption values of the cotton fabrics coated with PAni were determined to be 3.8 dB and 48%, respectively, and these values for the cotton fabrics coated with PPy were 6 dB and 50%, respectively. Consequently, a significant difference was not observed between the resistance values and electromagnetic parameters of the fabrics coated with PAni and PPy, although the intact textile characteristics of the fabric coated with PPy were protected and improved, whereas the characteristics of the fabric coated with PAni were inferior. Moreover, we first report that the fabrics coated with conductive polymers had excellent UV-protection properties.

The deposition of globular polypyrrole and polypyrrole nanotubes on cotton textile

“…Any substrate immersed in the reaction mixture becomes coated with a thin submicrometre overlayer of a conducting polymer [39,40]. The coating of fabrics by polypyrrole can be achieved in two ways: (a) by the polymerization of pyrrole with oxidant in the presence of fabrics [41], or (b) by the intercalation of pyrrole or oxidant into cotton followed by addition of second reactant [11,42,43]. Various oxidants has been studied, for example, iron(III) chloride (the most preferred) [42,43], ammonium peroxydisulfate [42] or iron(III) sulfate [42].…”

“…Conducting textiles find applications as antistatic substrates [3], in electromagnetic interference shielding [6,[9][10][11][12][13][14][15], electrochromic devices [16], electromechanical sensors [17,18], electrodes in supercapacitors [4,19], electrocardiogram monitoring [20] or dye-sensitized solar cells [21], as flexible electrodes [22], or in heat generation [23][24][25]. In addition to conductivity, conducting polymers have been be used to control wettability [5,26,27], to promote flame retardation [28][29][30], to be applied as antimicrobial coatings [15,31,32] or in noble-metal recovery [33].…”

Influence of TiO2 nanoparticles on formation mechanism of PANI/TiO2 nanocomposite coating on PET fabric and its structural and electrical properties

“…So far many efforts have been made to coat polyester (PET) [1,16], polyamide 6 [17], wool [18], polyacrylics [19] and cotton [20,21] textile materials with PANI. Chemical and electrochemical properties of PANI coated PET fabrics were studied by Molina et al [4].…”

Radiofrequency Shielding by Polypyrrole-Coated Nano and Regular Fibrous Mats

“…3,5 Therefore, protecting human beings as well as electronic devices from EM waves by shielding electronic devices is of paramount importance. 6 An EM shield attenuates EM radiation through three main mechanisms, namely reflection, absorption, and/or internal reflection. 5 Metals are efficient EM shields, mostly acting through the reflection mechanism, because of their good conductivity and shallow skin depth.…”