폴리카보실란 에멀젼의 동결건조를 이용한 다공체 SiC 제조

황연; Yeon Hwang

Korean Journal of Materials Research, Vol.26, No.6, 320-324, June, 2016

DOI10.3740/MRSK.2016.26.6.320 Export Citation

폴리카보실란 에멀젼의 동결건조를 이용한 다공체 SiC 제조

Preparation of Porous SiC by Freeze Drying of Polycarbosilane Emulsion

황연^†

서울과학기술대학교 신소재공학과

Yeon Hwang^†

Department of Materials Science & Engineering, Seoul National University of Science & Technology, Seoul 01811, Republic of Korea

E-mail:

Porous SiC beads were prepared by freeze-drying a polycarbosilane (PCS) emulsion. The water-in-oil (w/o) emulsion, which was composed of water, PCS dissolved p-xylene, and sodium xylenesulfonate (SXS) as an emulsifier, was frozen by dropping it onto a liquid N2 bath; this process resulted in 1~2 mm sized beads. Beads were cured at 200 ℃ for 1 h in air and heat-treated at 800 ℃ and 1400 ℃ for 1 h in an Ar gas flow. Two types of pores, lamella-shaped and spherical pores, were observed. Lamellar-shaped pores were found to develop during the freezing of the xylene solvent. Water droplets in the w/o emulsion were changed into spherical pores under freeze-drying. At 1400 ℃ of heat-treatment, porous SiC was synthesized with a low level of impurities.

Keywords:polycarbosilane;porous SiC;freeze-drying;polymer emulsion

[References]

Colombo P, Mera G, Riedel R, Soraru GD, J. Am. Ceram. Soc., 93(7), 1805 (2010)
Mera G, Navrotsky A, Sen S, Kleebe HJ, Riedel R, J. Mater. Chem. A, 1, 3826 (2013)
Zeschky J, Hofner T, Arnold C, Weißmann R, Bahloul-Hourlier D, Scheffler M, Greil P, Acta Mater., 53, 927 (2005)
Vakifahmetoglu C, Colombo P, Pauletti A, MartinF CF, Babonneau F, Int. J. Appl. Ceram. Technol., 7, 528 (2010)
Wang C, Wang J, Park CB, Kim YW, J. Ceram. Proc. Res., 10, 238 (2009)
Shibuya M, Takahashi T, Koyama K, Compos. Sci. Technol., 67, 119 (2007)
Biasetto L, Francis A, Palade P, Principi G, Colombo P, J. Mater. Sci., 43(12), 4119 (2008)
White RA, White EW, Weber JN, Science, 176, 922 (1972)
Bakumov V, Schwarz M, Kroke E, J. European Ceram. Soc., 29, 2857 (2009)
Frind R, Oschartz M, Kaskel S, J. Mater. Chem., 21, 11936 (2011)
Vakifahmetoglu C, Balliana M, Colombo P, J. European Ceram. Soc., 31, 1481 (2011)
Mason TG, Wilking JN, Meleson K, Chang CB, Graves SM, J. Phys. Condens. Matter, 18, R635 (2006)
Sajjadi S, Zerfa M, Brooks BW, Colloids Surf. A: Physicochem. Eng. Asp., 218, 241 (2003)
Yoon BH, Lee EJ, Kim HE, Koh YH, J. Am. Ceram. Soc., 90(6), 1753 (2007)
Vandewitte P, Dijkstra PJ, Vandenberg JW, Feijen J, J. Membr. Sci., 117(1-2), 1 (1996)
Gao CY, Li A, Feng LX, Yi XS, Shen JC, Polym. Int., 49, 323 (2000)

[1] Colombo P, Mera G, Riedel R, Soraru GD, J. Am. Ceram. Soc., 93(7), 1805 (2010)

[2] Mera G, Navrotsky A, Sen S, Kleebe HJ, Riedel R, J. Mater. Chem. A, 1, 3826 (2013)

[3] Zeschky J, Hofner T, Arnold C, Weißmann R, Bahloul-Hourlier D, Scheffler M, Greil P, Acta Mater., 53, 927 (2005)

[4] Vakifahmetoglu C, Colombo P, Pauletti A, MartinF CF, Babonneau F, Int. J. Appl. Ceram. Technol., 7, 528 (2010)

[5] Wang C, Wang J, Park CB, Kim YW, J. Ceram. Proc. Res., 10, 238 (2009)

[6] Shibuya M, Takahashi T, Koyama K, Compos. Sci. Technol., 67, 119 (2007)

[7] Biasetto L, Francis A, Palade P, Principi G, Colombo P, J. Mater. Sci., 43(12), 4119 (2008)

[8] White RA, White EW, Weber JN, Science, 176, 922 (1972)

[9] Bakumov V, Schwarz M, Kroke E, J. European Ceram. Soc., 29, 2857 (2009)

[10] Frind R, Oschartz M, Kaskel S, J. Mater. Chem., 21, 11936 (2011)

[11] Vakifahmetoglu C, Balliana M, Colombo P, J. European Ceram. Soc., 31, 1481 (2011)

[12] Mason TG, Wilking JN, Meleson K, Chang CB, Graves SM, J. Phys. Condens. Matter, 18, R635 (2006)

[13] Sajjadi S, Zerfa M, Brooks BW, Colloids Surf. A: Physicochem. Eng. Asp., 218, 241 (2003)

[14] Yoon BH, Lee EJ, Kim HE, Koh YH, J. Am. Ceram. Soc., 90(6), 1753 (2007)

[15] Vandewitte P, Dijkstra PJ, Vandenberg JW, Feijen J, J. Membr. Sci., 117(1-2), 1 (1996)

[16] Gao CY, Li A, Feng LX, Yi XS, Shen JC, Polym. Int., 49, 323 (2000)