Effect of surfactant on wet foam stability to SiC porous ceramics
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The stabilization of wet foam is an important parameter for obtaining a large volume of dried foams in porous ceramics. Octalymine (CH3(CH2)7NH2) is used as a foam stabilizer, which modifies the particle surface, improves the colloidal andrheological properties of the suspension, improving the wet foam stability with a tailored bubble size. The characterization ofSiC foams, including the contact angle, surface tension and adsorption free energy, Laplace pressure, foam stability, aircontent, bubble size, and relative bubble size are explored by changing the concentration of the ampliphile. Adsorption freeenergy of 1.5 × 10−15 J to nearly 1.4 × 10−14 J, and Laplace pressure of 0.52 mPa to 0.25 mPa, good wet foam stability of morethan 80%, was prepared by direct foaming. Macroporous SiC ceramics with open or closed cells, an average pore size of 350 µm,41.5% porosity and compressive strength up to 0.7 MPa were obtained when the sample was sintered at 2150 oC for 1 hr.
Abstract
The stabilization of wet foam is an important parameter for obtaining a large volume of dried foams in porous ceramics. Octalymine (CH3(CH2)7NH2) is used as a foam stabilizer, which modifies the particle surface, improves the colloidal andrheological properties of the suspension, improving the wet foam stability with a tailored bubble size. The characterization ofSiC foams, including the contact angle, surface tension and adsorption free energy, Laplace pressure, foam stability, aircontent, bubble size, and relative bubble size are explored by changing the concentration of the ampliphile. Adsorption freeenergy of 1.5 × 10−15 J to nearly 1.4 × 10−14 J, and Laplace pressure of 0.52 mPa to 0.25 mPa, good wet foam stability of morethan 80%, was prepared by direct foaming. Macroporous SiC ceramics with open or closed cells, an average pore size of 350 µm,41.5% porosity and compressive strength up to 0.7 MPa were obtained when the sample was sintered at 2150 oC for 1 hr.
참고문헌 (22)
- X. Wu, , New J. Glass Ceram, 3, pp.43~47 (2013)
- M. Fukushima, , J. Eur. Ceram. Soc, 32(2), pp.503~510 (2012)
- M. Fukushima, , Sci. Technol. Adv. Mater, 11, pp.044303~ (2010)
- K.H. Zum Gahr, , Wear, 250, pp.299~310 (2001)
- J.H. Eom, , J. Eur. Ceram. Soc, 28, pp.1029~1035 (2008)
- M. Scheffler, "Structure, Manufacturing, Properties and Applications", pp.645~ (2005), Wiley-VCH, Verlag GmbH & Co. KGaA
- A.R. Studart, , J. Am. Ceram. Soc, 89(6), pp.1771~1789 (2006)
- J.C.H. Wong, , J. Mater. Chem, 20, pp.5628~5640 (2010)
- R. Mouazer, , Adv. Eng. Mater, 7(12), pp.1124~1128 (2005)
- M. Vecer, , Procedia Eng, 42, pp.1720~1725 (2012)
- Z. Yuan, , RSC Adv, 4, pp.50386~ (2014)
- J.S. Lee, , J. Alloys Compd, 467, pp.543~549 (2009)
- K. Ohenoja, , Chem. Eng. Technol, 37(5), pp.833~839 (2014)
- F. Li, , J. Eur. Ceram. Soc, 34, pp.3513~3520 (2014)
- N. Sarkar, , Ceram. Int, 41, pp.4021~4027 (2015)
- L.Y. Zhang, , J. Eur. Ceram. Soc, 34, pp.2443~2452 (2014)
- Ashish Pokhrel, "Processing of Porous Ceramics by Direct Foaming: A Review", 한국세라믹학회지, 50(2), pp.93~102 (2013), 한국세라믹학회[DOI]
- B.S. Murray, , Curr. Opin. Colloid Interface Science, 12, pp.231~241 (2007)
- T.S. Horozov, , Curr. Opin. Colloid Interface Science, 13, pp.134~140 (2008)
- R.L. Menchavez, , Mater. Res, 17(1), pp.157~167 (2014)
- A.R. Patel, , RSC Adv, 5, pp.9703~ (2015)
- I. Butnaru, , Polym, 7, pp.1541~1563 (2015)