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Energies 2017, 10(5), 681; doi:10.3390/en10050681

Enhancing Insulating Performances of Presspaper by Introduction of Nanofibrillated Cellulose

1
Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
2
Research Department of High Voltage Technology, Electric Power Research Institute of China Southern Power Grid, Guangzhou 510633, China
*
Author to whom correspondence should be addressed.
Academic Editor: Issouf Fofana
Received: 27 March 2017 / Revised: 6 May 2017 / Accepted: 9 May 2017 / Published: 12 May 2017
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Abstract

This study explores the possibility of enhancing both mechanical and breakdown properties of insulating presspaper by the introduction of an organic nano additive. Four different concentrations of nanofibrillated cellulose (NFC) were taken into account: 0.5 wt %, 2.5 wt %, 5 wt %, and 10 wt %. Presspaper containing no NFC was also prepared as a reference. Obtained samples were characterized by scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). Mechanical properties and breakdown behaviors were measured. Results show that the addition of 10 wt % NFC to softwood fibers can achieve the best performance. Tensile strength of reference presspaper is 109 MPa, whereas that of presspaper modified by 10 wt % NFC is 136 MPa, resulting in a 25% increase. The improved tensile strength can be attributed to the increased density and inter fiber bond strength. More importantly, presspaper reinforced by 10 wt % NFC can also achieve enhanced AC and DC breakdown strengths, which are 19% and 21% higher than those of the reference presspaper. It is concluded that NFC is likely to be a promising nano additive for cellulose insulation. View Full-Text
Keywords: insulating presspaper; nanofibrillated cellulose; tensile strength; breakdown behavior insulating presspaper; nanofibrillated cellulose; tensile strength; breakdown behavior
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Huang, J.; Zhou, Y.; Dong, L.; Zhou, Z.; Zeng, X. Enhancing Insulating Performances of Presspaper by Introduction of Nanofibrillated Cellulose. Energies 2017, 10, 681.

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