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To enhance the insulating performance of presspaper used in power transformers, unmodified nanofibrillated cellulose (UNFC), cationic nanofibrillated cellulose (CNFC), anionic nanofibrillated cellulose (ANFC) and cellulose nanocrystals (CNC) were investigated as the potential nano-additives. Concentration of the nano-additives was 10 wt%. Functional groups and crystallinities of the obtained samples...
In this study, softwood pulps with Schopper Riegler (SR) freeness of 10 °SR, 17 °SR, 31 °SR, 40 °SR, 48 °SR were used to prepare presspaper samples. Morphological properties of fibers and presspaper were characterized by optical microscope (OM) and scanning electron microscope (SEM). Mechanical and electrical performances of obtained samples were evaluated. Results show that cellulose fibers become...
This study explores the possibility of enhancing both mechanical and breakdown properties of insulating presspaper by introduction of an organic nano additive. Two different concentrations of nanofibrillated cellulose (NFC) were taken into account, namely 0.5 wt. % and 10 wt. %. Presspaper containing no NFC was also prepared as a reference. Obtained samples were characterized by scanning electron...
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