Predicting the Dielectric Properties of Nanocellulose-Modified Presspaper Based on the Multivariate Analysis Method

Abstract

Nanocellulose-modified presspaper is a promising solution to achieve cellulose insulation with better performance, reducing the risk of electrical insulation failures of a converter transformer. Predicting the dielectric properties will help to further design and improvement of presspaper. In this paper, a multivariable method was adopted to determine the effect of softwood fiber on the macroscopic performance of presspaper. Based on the parameters selected using the optimum subset method, a multiple linear regression was built to model the relationship between the fiber properties and insulating performance of presspaper. The results show that the fiber width and crystallinity had an obvious influence on the mechanical properties of presspaper, and fiber length, fines, lignin, and nanocellulose had a significant impact on the breakdown properties. The proposed models exhibit a prediction accuracy of higher than 90% when verified with the experimental results. Finally, the effect of nanocellulose on the breakdown strength of presspaper was taken into account and new models were derived.

The Effect of Fe3O4 Nanoparticle Size on Electrical Properties of Nanofluid Impregnated Paper and Trapping Analysis

“…Publication [ 14 ] observed the combination of nanoparticles and insulating paper through scanning electron microscope (SEM) and found that the DC breakdown voltage and AC breakdown voltage of nanofluid impregnated paper were both higher than that of insulating oil impregnated paper. Publication [ 15 ] predicted the dielectric properties of nanocellulose-modified press-paper by the multivariate analysis method. However, comparative and systematic studies on the influence of nanoparticle size on the breakdown voltages and the dielectric properties of nanofluid impregnated paper is still an open issue, which is becoming increasingly important when applying such nanofluid impregnated paper in large power equipment.…”

Nanocellulose characterization challenges

“…Moreover, the expansion of the NC industry strongly depends on the advance of characterization and modelling techniques, since these protocols are the key to advance in both NC industrial production and their optimal utilisation in different applications (Lengowski et al 2016;Zhou et al 2018).…”