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In order to suppress surface charge accumulation on the epoxy resin insulation and to investigate the influence of treatment time on the charge accumulation, epoxy samples are surface fluorinated for the different times of 10 min, 30 min and 60 min in a laboratory vessel using an F2/N2 mixture. Attenuated total reflection infrared analyses and the observations of the cross section and the surface of the samples by SEM indicate the increases in degree of fluorination, thickness and compactness of the fluorinated layer, and the decrease in surface roughness, with treatment time increasing. Compared with the deep surface charge traps and stable surface charge of the unfluorinated (original) sample, as indicated by the open-circuit thermally stimulated discharge current measurement, the fluorinated surface cannot store the charge. The corona charges deposited on the sample surfaces fluorinated for 10 min, 30 min or 60 min rapidly decay to zero in about 2 min, 10 min or 15 mi at room temperature respectively, showing a slowed-down release of charge with fluorination time. The measurements of surface conductivity and contact angle and the calculation of surface energy reveal that fluorination gives rise to dramatic increases in surface conductivity, surface wettability and polarity, while they decrease with treatment time. The significant increase in surface conductivity of the fluorinated sample is attributed to a very likely substantial decrease in trap depth and the adsorbed water on the fluorinated surfac. Surface charging current measurements further show that large steady state current flows along the fluorinated surface during corona charging, in comparison with the almost zero steady state current for the original sample. This implies that the fluorinated sample has much lower surface charge accumulation in the period of charging, than the original sample.
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Keywords:
- epoxy resin insulation /
- surface fluorination time /
- surface charge accumulation /
- surface electrical properties
[1] De Lorenzi A, Grando L, Pesce A, Bettini P, Specogna R 2009 IEEE Trans. DEI 16 77
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[3] Jun X, Chalmers I D 1997 J. Phys. D: Appl. Phys. 30 1055
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[5] Volpov E 2002 IEEE Electr. Insul. M 18 7
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[8] Imano A M 2004 J. Electrostat. 61 1
[9] Hasegawa T, Yamaji K, Hatano M, Endo F, Rokunohe T, Yamagiwa T 1997 IEEE Trans. Power Delivery 12 194
[10] Kharitonov A P 2008 Prog. Org. Coat. 61 192
[11] Tressaud A, Durand E, Labrugere C, Kharitonov A P, Kharitonova L N 2007 J. Fluorine Chem. 128 378
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[14] Yao J, An Z, Mao M, Zhang Y, Xia Z 2010 Acta Phys. Sin. 59 6508 (in Chinese) [姚俊兰, 安振连, 毛明军, 张冶文, 夏钟福 2010 59 6508]
[15] An Z, Yang Q, Xie C, Jiang Y, Zheng F, Zhang Y 2009 J. Appl. Phys. 105 064102
[16] Jiang Y, An Z, Liu C, Zheng F, Zhang Y 2010 IEEE Trans. DEI 17 1814
[17] An Z, Liu C, Chen X, Zheng F, Zhang Y 2012 Acta Phys. Sin. 61 098201 (in Chinese) [安振连, 刘晨霞, 陈暄, 郑飞虎, 张冶文 2012 61 098201]
[18] Wu S 1982 Polymer Interface and Adhesion (Marcel Dekker, New York) p169
[19] Morell M, Ramis X, Ferrando F, Yu Y, Serra A 2009 Polymer 50 5374
[20] Cherdoud-Chihani A, Mouzali M, Abadie M J M 2003 J. Appl. Polym. Sci. 87 2033
[21] Meure S, Wu D Y, Furman S A 2010 Vibrational Spectroscopy 52 10
[22] Kranz G, Lüschen R, Gesang T, Schlett V, Hennemann O D, Stohrer W D 1994 Int. J. Adhes. Adhes. 14 243
[23] Ryan B J, Poduska K M 2008 Am. J. Phys. 76 1074
[24] du Toit F J, Sanderson R D 1999 J. Fluorine Chem. 98 107
[25] Le Roux J D, Paul D R, Arendt M F, Yuan Y, Cabasso I 1994 J. Membr. Sci. 90 37
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[1] De Lorenzi A, Grando L, Pesce A, Bettini P, Specogna R 2009 IEEE Trans. DEI 16 77
[2] Ponsonby A, Farish O 1999 Proceedings of the 11th International Symposium on High Voltage Engineering London, August 23-27, 1999 p248
[3] Jun X, Chalmers I D 1997 J. Phys. D: Appl. Phys. 30 1055
[4] Tenbohlem S, Schrocher G 2000 IEEE Trans. DEI 7 241
[5] Volpov E 2002 IEEE Electr. Insul. M 18 7
[6] Hama H, Hikosaka T, Okabe S, Okubo H 2007 IEEE Trans. DEI 14 508
[7] Kaneko S, Okabe S, Kobayashi T, Nojima K, Takei M, Miyamoto T 2009 Electr. Eng. Jpn. 168 6
[8] Imano A M 2004 J. Electrostat. 61 1
[9] Hasegawa T, Yamaji K, Hatano M, Endo F, Rokunohe T, Yamagiwa T 1997 IEEE Trans. Power Delivery 12 194
[10] Kharitonov A P 2008 Prog. Org. Coat. 61 192
[11] Tressaud A, Durand E, Labrugere C, Kharitonov A P, Kharitonova L N 2007 J. Fluorine Chem. 128 378
[12] An Z, Zhao M, Yao Y, Zhang Y, Xia Z 2009 J. Phys. D: Appl. Phys. 42 015418
[13] An Z, Mao M, Yao J, Zhang Y, Xia Z 2010 J. Phys. D: Appl. Phys. 43 415302
[14] Yao J, An Z, Mao M, Zhang Y, Xia Z 2010 Acta Phys. Sin. 59 6508 (in Chinese) [姚俊兰, 安振连, 毛明军, 张冶文, 夏钟福 2010 59 6508]
[15] An Z, Yang Q, Xie C, Jiang Y, Zheng F, Zhang Y 2009 J. Appl. Phys. 105 064102
[16] Jiang Y, An Z, Liu C, Zheng F, Zhang Y 2010 IEEE Trans. DEI 17 1814
[17] An Z, Liu C, Chen X, Zheng F, Zhang Y 2012 Acta Phys. Sin. 61 098201 (in Chinese) [安振连, 刘晨霞, 陈暄, 郑飞虎, 张冶文 2012 61 098201]
[18] Wu S 1982 Polymer Interface and Adhesion (Marcel Dekker, New York) p169
[19] Morell M, Ramis X, Ferrando F, Yu Y, Serra A 2009 Polymer 50 5374
[20] Cherdoud-Chihani A, Mouzali M, Abadie M J M 2003 J. Appl. Polym. Sci. 87 2033
[21] Meure S, Wu D Y, Furman S A 2010 Vibrational Spectroscopy 52 10
[22] Kranz G, Lüschen R, Gesang T, Schlett V, Hennemann O D, Stohrer W D 1994 Int. J. Adhes. Adhes. 14 243
[23] Ryan B J, Poduska K M 2008 Am. J. Phys. 76 1074
[24] du Toit F J, Sanderson R D 1999 J. Fluorine Chem. 98 107
[25] Le Roux J D, Paul D R, Arendt M F, Yuan Y, Cabasso I 1994 J. Membr. Sci. 90 37
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