A Review of Two Nanocomposite Insulating Materials Models: Lewis’ Contribution in the Development of the Models, their Differences, their Similarities and Future Challenges

Abstract

Nanocomposite polymers are nowadays a major field of research. This paper investigates the interpretational possibilities of two models developed, namely, Tsagaropoulos’ model and Tanaka’s model. Particular emphasis is given to Lewis’ model, which was the first one to be proposed and whose contribution to the aforementioned models was significant. The two models were developed separately and independently from each other. They both consider various layers around the nanoparticles. They both consider well bonded and more loosen layers. Similarities and differences between the two models are pointed out and discussed as well as possibilities for further research in order to shed light on some aspects of electrical phenomena in these materials. Particular emphasis is given to the interfaces between the nanoparticles and the surrounding base material. Comments are offered regarding the challenges facing the two models w.r.t. the interpretation of discharges on nanocomposite surfaces. Possible new areas of research are suggested and new challenges for the aforementioned models are pointed out.

Properties of Polymer Composites Used in High-Voltage Applications

“…This model can explain different electrical properties, such as partial discharges resistance of PA/LS nanocomposites [ 76 ]. Some articles were published in order to show Lewis’ contribution in the developments of Tsagaropoulos’ and Tanaka’s models, their differences and similarities and future challenges [ 81 , 82 ].…”

Experimental Study of Electric and Dielectric Behavior of PVC Composites

“…In recent years, nanotechnology has been used in the synthesis of various types of polymer nanocomposites and in understanding their physical and chemical properties [1][2][3][4][5]. The presence of nanoparticles in polymers improves their mechanical, electrical and chemical properties.…”

Insulating Materials at Very Low Temperatures: A Short Review

“…Partial discharges due to defects must be further explored with insulating systems at very low temperatures both w.r.t their mechanisms and classification, as was done with conventional polymers at normal temperature with isolated as well as multiple defects [69,70]. It is needless to say that with the advent of polymer nanocomposites, a new prospect opens in the field of the applications at very low temperatures [71][72][73][74]. Research in this direction has already been performed and the prospects of employing polymer nanocomposites has been discussed, although one gets the impression that more effort was put into clarifying their mechanical properties rather than their electrical properties [75][76][77][78].…”