Azadfallah, M., khodabandehlo, H., Shayeghani akmal, A. (2016). The effect of pulp and cellulose nanofiber cyanoethylation on the physical properties of transformer insulating paper. , 31(SPRING 1), 1-13. doi: 10.22092/ijwpr.2015.105604
Mohammad Azadfallah; Hamid khodabandehlo; Amir abas Shayeghani akmal. "The effect of pulp and cellulose nanofiber cyanoethylation on the physical properties of transformer insulating paper". , 31, SPRING 1, 2016, 1-13. doi: 10.22092/ijwpr.2015.105604
Azadfallah, M., khodabandehlo, H., Shayeghani akmal, A. (2016). 'The effect of pulp and cellulose nanofiber cyanoethylation on the physical properties of transformer insulating paper', , 31(SPRING 1), pp. 1-13. doi: 10.22092/ijwpr.2015.105604
Azadfallah, M., khodabandehlo, H., Shayeghani akmal, A. The effect of pulp and cellulose nanofiber cyanoethylation on the physical properties of transformer insulating paper. , 2016; 31(SPRING 1): 1-13. doi: 10.22092/ijwpr.2015.105604

The effect of pulp and cellulose nanofiber cyanoethylation on the physical properties of transformer insulating paper

تحقیقات علوم چوب و کاغذ ایران
Article 1, Volume 31, SPRING 1 - Serial Number 54, March 2016, Pages 1-13    PDF (874.98 K)
Document Type: Research Paper
DOI: 10.22092/ijwpr.2015.105604
Authors
Mohammad Azadfallah* 1; Hamid khodabandehlo2; Amir abas Shayeghani akmal3
1Assistant Professor, Department of Wood and Paper Sciences and Technology, Faculty of Natural Resources, University of Tehran, Karaj, Iran
2M.Sc., Pulp and Paper Technology, Faculty of Natural Resources, University of Tehran, Karaj, Iran
3Assistant Professor, Department of Electrical Engineering, School of Electrical & Computer Engineering, University of Tehran, Tehran, Iran
Abstract
     The properties of transformer electrical insulating papers are influenced by fiber chemical modification process. In this research, the effect of cyanoethylation of fibers and addition of cyanoethylated cellulose nanofiber (CNF) on dielectric properties including capacitance, dielectric loss, insulation resistance, breakdown voltage as well as tensile strength of two grade of handsheets made of unbleached long fibers and its mixture with bagasse soda pulp (with the ratio of 1:1) were evaluated after impregnating with mineral oil. Cyanoethylation of CNF and pulp fibers was performed by grafting of acrylonitrile under alkaline condition at 40 ̊C and room temperature respectively. Then, the nitrogen content of cyanoethylated samples was determined using Kjeldahl method and degree of substitution (DS) was calculated. The results showed that cyanoethylation of pulp fibers and CNF decreased the capacitance and tensile strength of insulated papers. It was also observed that the chemical modification imposed slight effect on dielectric loss, but insulation resistance and dielectric voltage were increased.
Keywords
Cyanoethylation; insulation paper; cellulose nanofiber; dielectric properties
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