Conductive poly (o-anisidine)/poly (ethylene terephthalate) nonwoven composite: Investigation of synthesis parameters and electromagnetic shielding effectiveness

Abstract

A conductive poly(o-anisidine) (POA)/poly(ethylene terephthalate) (PET) nonwoven composite was prepared by chemical oxidative polymerization of o-anisidine in aqueous HCl solution. The effects of the oxidant type, oxidant/monomer mol ratio, and polymerization temperature and time were studied on POA content and surface resistivity of the composite. It was observed that the swelling of PET in 1,4-dioxane decreased the surface resistivity of the POA/PET composite by up to 18.5 k/cm 2 , when compared to that of the unswollen PET nonwoven. According to the electromagnetic shielding effectiveness (EMSE), and the relative shielding efficiency of the absorbance (A b ) and reflectance (R e ) values of the composite in the range 15-1500 MHz, 99.9% of the shielding was obtained with an attenuation of 33 dB at 15 MHz. The durability of the composite was determined by measuring its surface resistivity after domestic washing and commercial laundering.

Fabrication of poly(o‐Anisidine)/Ag particles coated poly(ethylene terephthalate) nonwoven composite and investigation of antibacterial activity

“…a) was covered with homogenous film‐like POA layers as well as deposited Ag particles, and depending on the increasing of POA/Ag contents of the composite, the increasing of coating thickness was visually recognized. The increase in the POA coating thickness was evident from the cracks formed on the surface of the nonwoven which was also encountered in our previous POA/PET composite prepared with (NH 4 ) 2 S 2 O 8 . Another important point was the morphology of the deposited Ag particles because the presence of Ag particles became prominent as interspersed shiny areas on the granular POA aggregates with increasing of POA/Ag contents of the composite (Fig.…”

“…In our study, we first report the in situ preparation of a POA/Ag/PET nonwoven composite by polymerization of o ‐anisidine with AgNO 3 accelerated by a secondary oxidant. The POA is one of the most conductive derivatives of polyaniline and has substantial properties such as fast and straightforward conversion of its monomer to polymer and enabling a homogenous coating on the surface . The effects of polymerization conditions such as secondary oxidant type, secondary oxidant/AgNO 3 mol ratio, types of acids used as polymerization medium, and concentrations of acids were studied on POA/Ag content and volume resistivity of the composite.…”

Electromagnetic Shielding Effectiveness of Polyaniline/Modified-Poly(vinyl Alcohol) Film Composite

“…After the formation of films using different concentrations of M-PVA solutions, the PAn coating process was carried out onto these film surfaces using either 0.33 M aniline (liquid form) or aniline.HCl (solid) as the monomer in 1.0 M HCl medium, in which the highly conductive PAn synthesis was frequently performed [28]. When aniline monomer was used in the polymerization, the surface of the M-PVA film was covered with the PAn layer at the individual regions.…”

Polypyrrole and silver particles coated poly(ethylene terephthalate) nonwoven composite for electromagnetic interference shielding

“…The details of the measurement were given in our previous work. 24 The EMSE value of the composite was calculated in dB unit, from the equation 225…”