Dielectric polymer nanocomposites: Past advances and future prospects in electrical insulation perspective

Abstract

Polymeric materials enjoy widespread acceptance among electrical insulation design engineers due to their multi‐functional attributes (e.g., excellent dielectric properties, high strength to weight ratio, and ease of molding). However, charge accumulation at the high DC field, poor discharge resistance, low thermal conductivity, limited‐service temperature range, and inadequate stiffness have proven to be severe obstructions to far‐reaching utilization of these materials. To ensure the reliability of today's electrical power systems, novel dielectric materials with enhanced functionalities are essential. An idea that originated under the name of polymer nanocomposites (PNCs) is supposed to provide a viable solution to the challenges mentioned earlier. PNCs are made by mixing a small quantity of nanometer‐sized fillers into a polymer matrix and dispersing them uniformly. To effectively use PNCs in electrical insulation for power apparatus, extensive research into the physical and chemical phenomena associated with these new materials is required. This article aims to provide a comprehensive review of previous research on dielectric PNCs, including synthesis, electrical and nonelectrical characterization, and attendant issues from an electrical insulation standpoint.

Dielectric behaviour of plasma hydrogenated TiO2/cyanoethylated cellulose nanocomposites

“…One possible way of achieving this is to introduce one of the materials in nanoparticle form within the other i.e a nanocomposite. 4 This has the advantage of maximising surface (interface) area to volume ratio of the material included in nanoparticle form.…”

Electric field‐assisted preparation of PANI/TPU all‐organic composites with enhanced dielectric permittivity and anisotropic optical properties

“…[ 1–4 ] Polymer‐based composites, where other materials are used as fillers in a polymer matrix, can offer a potential approach since the comprehensive properties are difficult to be realized in a single dielectric material. [ 5–7 ] In addition, inorganic filler/organic polymer‐based composites have been extensively studied to improve the properties of materials, [ 8–10 ] then based on the type of filler used, these composites can be mainly classified into two categories: (1) ceramic filler/polymer‐based composites where the fillers are the high dielectric inorganic ceramic materials [ 11,12 ] ; (2) conductive filler/polymer‐based composites in which the fillers are the conductive materials. [ 13–16 ]…”

Thermo‐responsive dielectric pulse in poly(vinylidene fluoride)/polyethylene glycol fibrous mats

“…[1][2][3] The dielectric constant, reflecting the capacitance and polarization of the materials, can change with external circumstances, such as electric field and temperature. [4][5][6][7][8][9][10] Thermo-responsive dielectric materials have broad application prospects in the field of next-generation switches, sensors, actuators, etc. [11][12][13] Therefore, the development of novel stimuli-responsive dielectrics remains of particular interest.…”