Negative Capacitance in Nanocomposite Based on High-Density Polyethylene (HDPE) with Multiwalled Carbon Nanotubes (CNTs)

Negative capacitance (NC), already observed in conducting polymer-based nanocomposites, was recently reported and evidenced at low frequencies (<10 kHz) non-conducting nanocomposites containing conductive particles. In this contribution, we demonstrate that it is possible to produce economic high-density polyethylene (HDPE) exhibiting an NC effect via a convenient environmentally friendly extrusion-like process by only adjusting the duration of melt-mixing. Nanocomposite materials are produced confining limited quantity, i.e., 4.6 wt.%, multiwalled carbon nanotubes (CNTs) within semi-crystalline HDPE reach percolation threshold. With increasing melt processing time, crystallites developing surface CNTs become bigger perturbate connections between leading dramatic change electrical behavior systems. More specifically, link current oscillations stressed while dependence with size polymer evidenced. tends appear when space charge effects take place HDPE/MWCNT interfaces, structures crystallite sizes corresponding 10 min