Abstract
Wettability of electrolytically oxidized graphite fibers has been investigated by contact angle measurements employing the Wilhelmy method. The atomic ratio of oxygen to carbon, O/C, in the surface layer of the graphite fiber increased with increasing electric specific charge. Contact angle hysteresis was not observed for the untreated graphite fiber (O/C=0.01). The contact angles decreased with increasing O/C, especially for the receding angle, and approached constant for O/C>0.2. The nondispersive and dispersive surface free energies of the oxidized graphite fibers were calculated from the experimentally determined contact angles. The nondispersive surface free energy increased by the oxidation, whereas the dispersive one decreased. From the results of surface analysis, it was found that the changes in the nondispersive and dispersive surface free energies were caused by the increase in O/C ratio and the decrease in surface crystallinity, respectively.
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References
Sacher E (1983) J Colloid Interface Sci 92:275
Tagawa M, Gotoh K, Yokokura M, Syutoh A, Takechi S (1989) Colloid Polym Sci 267:434
Morra M, Occhiello E, Garbassi F (1990) Advan Colloid Interface Sci: 32:79
Johnson RE, Jr, Dettre RH (1969) In: Surface and Colloid Science Vol. 2. John Wiley & Sons, p 93
Cain JB, Francis DW, Venter RD, Neumann AW (1983) J Colloid Interface Sci 94:123
Diefendorf RJ, Takarsky E (1975) Polymer Engineering and Science 15:150
Dwight DW, Fowkes FM, Cole DA, Kulp MJ, Sabat PJ, Salvati L, Jr, Huang TC (1990) J Adhesion Sci Technol 4:619
Hsieh YL, Wu M, Andres D (1991) J Colloid Interface Sci 144:127
Donnet JB, Brendle M, Dhami TL, Bahl OP (1986) Carbon 24:757
Donnet JB, Dhami TL, Dong S, Brendle M (1987) J Phys D: Appl Phys 20:269
Hammer GE, Drzal LT (1980) Applications of Surface Science 4:340
Drzal LT, Mescher JA, Hall DL (1979) Carbon 17:375
Takahagi T, Ishitani A (1984) Carbon 22:43
Chabert B, Hoffmann P, Sage D, Soulier JP (1988) J Colloid Interface Sci 124:375
Shindo A (1988) Proc Intern Conf Interfaces in Composite Materials, S. P. E. Benelux Lieg
Fitzer E, Jager H, Popovska N, Sturm FV (1988) J Appl Electrochem 18:178
Nakayama Y, Soeda F, Ishitani A (1990) Carbon 28:21
Tsutsumi K, Ishida S, Shibata K (1990) Colloid Polym Sci 268:31
Tagawa M, Ohmae N, Umeno M, Gotoh K, Yasukawa A, Tagawa M (1989) Colloid Polym Sci 267:702
Tagawa M, Gotoh K, Yasukawa A, Ikuta M (1990) Colloid Polym Sci 268:589
Tagawa M, Ohmae N, Umeno M, Yasukawa A, Gotoh K, Tagawa M (1991) Japanese J Applied Physics 30:2134
Tagawa M, Yasukawa A, Gotoh K, Tagawa M, Ohmae N, Umeno M (1992) J Adhesion Sci Technol 6:763
Johnson RE, Jr, Dettre RH (1964) J Physical Chem 68:1744
Dettre RH, Johnson RE, Jr (1965) J Physical Chem 69:1507
Fowkes FM (1968) J Colloid Interface Sci 28:493
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Gotoh, K., Yasukawa, A., Ohkita, M. et al. Wettability and surface free energy of electrolytically oxidized graphite fibers. Colloid Polym Sci 273, 1144–1150 (1995). https://doi.org/10.1007/BF00653082
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DOI: https://doi.org/10.1007/BF00653082