Figure 1 - uploaded by Philippe Dubois
Content may be subject to copyright.
Source publication
The difficult processability of polyaniline (PAni) can be overcome by preparing composites with high density polyethylene (HDPE), resulting in a conducting material with improved mechanical properties. PAni nanofibers were synthesized in this research using a rapid mixing method, while HDPE/PAni composites were prepared by in situ polymerization us...
Contexts in source publication
Context 1
... SEM images of the synthesized PAni nanofibers are shown in Figure 1. Nanofibers characterized by high aspect ratio proved to form a largely interconnected network. ...
Citations
... Preparation of these samples can also be made by electrochemical deposition, powder dispersion, melt blending, and solution blending. The mixture of polyethylene and PANI has shown attractive properties as antistatic material, gas separation, ion-exchange membranes, transducers in sensor devices [7,8], antioxidant and antimicrobial packaging [22,23], and in electromagnetic radiation shielding and RAM [24]. ...
Conducting polymers have attracted a great scientific and technological interest due to their interesting properties, particularly its high electrical conductivity. The polyanilines stand out because of the ease of doping with protonic acids and their chemical stability in the doped form. The processability of conducting polymers is a crucial factor in the use of their electrical and electrochemical properties in technological applications. In this work, the processability of linear low-density polyethylene (LLDPE) and polyaniline (PANI) composites was evaluated using a torque rheometer. Composites with different contents of PANI were processed in a torque rheometer and characterized using thermal analysis (DSC), mechanical properties (uniaxial tension), electromagnetic (electrical permittivity, magnetic permeability and reflection loss) measurements and scanning electron microscopy observations. The addition of PANI decreased the crystallinity degree of the LLDPE. On the other hand, the elastic modulus increased. The complex parameters of permittivity and permeability (8.2–12.4 GHz) varied as function of the PANI content in the LLDPE. Reflection loss simulations in the frequency range of 8.2–12.4 GHz showed that the 2.0-mm-LLDPE/PANI sample (60/40 wt%) behaved as a good microwave absorber attenuating the incident electromagnetic wave up to 92%.
Conventional polymer blending has a shortcoming in conductivity characteristic. This research addresses the preparation of conductive thermoplastic natural rubber (TPNR) blends with graphene nanoplates (GNPs)/polyaniline (PANI) through melt blending using an internal mixer. The effect of PANI content (10, 20, 30, and 40 wt %) on the mechanical and thermal properties, thermal and electrical conductivities, and morphology observation of the TPNR/GNPs/PANI nanocomposites was investigated. The results showed that the tensile and impact properties as well as thermal conductivity of nanocomposite had improved with the incorporation of 3 wt % of GNPs and 20 wt % of PANI as compared to neat TPNR and reduced with further increase of the PANI content. It was observed that the GNPs and PANI acted as a critical component to improve the thermal stability and electrical conductivity of the TPNR/GNPs/PANI nanocomposites. The most improved conductivity of 5.22 E‐5 S/cm was observed at 3 wt % GNPs and 40 wt % PANI. Variable‐pressure scanning electron microscopy micrograph revealed the good interaction and distribution of GNPs and PANI within TPNR matrix at PANI loadings lower than 30 wt %. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 137, 48873.
Nanofillers of polyaniline nanofibers (PANI) with graphite oxide (GO) or reduced graphite oxide (rGO) were synthesized and characterized. Four samples of PANI/graphite with 10% and 30% of GO or rGO were obtained. The addition of GO or rGO in PANI nanofibers increased the conductivity and improved the thermal stability of the nanofillers. These nanofillers were used in the in situ ethylene polymerization producing PE/PANI/graphite nanocomposites characterized by SEM and TEM, revealing very particular morphologies. PANI/GO or PANI/rGO nanoparticles showed a good dispersion in polyethylene, and an increase in the thermal stability of the final material was observed. POLYM. COMPOS., 2017.
