High-performance thermoplastic composites poly(ether ketone ketone)/silver nanowires: Morphological, mechanical and electrical properties

Abstract

High-performance conductive thermoplastic composites poly(ether ketone ketone) (PEKK)/silver nanowires were elaborated by melt blending. Silver nanowires (AgNWs) with high aspect ratio (ξ~220) were elaborated through the polyol process in presence of poly(vinyl pyrrolidone) (PVP) and ethylene glycol. Scanning electron microscopy observations of nanowires were performed after an adapted cleaning process. The dispersion of NWs in the polymeric matrix was evaluated. A very low percolation threshold of 0.6 vol% was obtained. Electrical conductivity values obtained above the percolation threshold were among the highest measured for low-filled conductive polymer composites. The influence of AgNWs on the PEKK matrix has been investigated by differential scanning calorimetry and dynamic mechanical analyses. It is important to note that thermal and dynamic mechanical performances of the polymeric matrix were preserved in composites.

Electrical, mechanical and thermal properties of aligned silver nanowire/polylactide nanocomposite films

“…6 (a). This behavior is consistent with the study of Lonjon et al, where transition temperatures for PEEK were found to be unaffected with the addition of Ag NWs [12]. Crystallinity percentage of neat PLA and nanocomposites are provided in Fig.…”

“…In addition, presence of aggregates also increases the t value. When we extrapolate the power law equation, conductivity of a nanocomposite filled with 100% fillers is calculated as 10 6.74±0.27 S/m, which is lower than the conductivity of bulk silver yet it is consistent with the Ag NW/polymer matrix conductive composites in literature [12].…”

“…A conductivity change within 18 orders of magnitude is obtained for the fabricated samples. Conductivity at 1.74 vol % is an order of magnitude lower than those reported in the literature for the same nanowire content [12,13,43]. It is attributed to the alignment of Ag NWs within the PLA matrix.…”

“…However, due to oxide layer formation on Cu and Ni NWs, maximum conductivity of the nanocomposites could not exceed 10 À1 S/m [9,10]. In contrast, higher conductivity values were reported from the nanocomposites fabricated with Ag NWs [12,13].…”

Innovative conductive polymer composite coating for aircrafts lightning strike protection

“…AgSWs are elaborated with a modified polyol process inspired by Sun and Wiley works . It consists in the reduction of AgNO 3 with ethylene glycol solution.…”