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http://dx.doi.org/10.3740/MRSK.2016.26.12.733

Dispersion Property of Al2O3 Nanosol Prepared by Various Dispersion Factors and Silane Modification under Non-Aqueous Solvent  

Na, Ho Seong (Eco-Composite Materials Center, Energy Environment Material Division, Korea Institute of Ceramic Engineering & Technology (KICET))
Park, Min-Gyeong (Eco-Composite Materials Center, Energy Environment Material Division, Korea Institute of Ceramic Engineering & Technology (KICET))
Lim, Hyung Mi (Eco-Composite Materials Center, Energy Environment Material Division, Korea Institute of Ceramic Engineering & Technology (KICET))
Kim, Dae Sung (Eco-Composite Materials Center, Energy Environment Material Division, Korea Institute of Ceramic Engineering & Technology (KICET))
Publication Information
Korean Journal of Materials Research / v.26, no.12, 2016 , pp. 733-740 More about this Journal
Abstract
$Al_2O_3$ nanosol dispersed under ethanol or N-Methyl-2-pyrrolidone(NMP) was studied and optimized with various dispersion factors and by utilizing the silane modification method. The two kinds of $Al_2O_3$ powders used were prepared by thermal decomposition method from aluminum ammonium sulfate$(AlNH_4(SO_4)_2)$ while controlling the calcination temperature. $Al_2O_3$ sol was prepared under ethanol solvent by using a batch-type bead mill. The dispersion properties of the $Al_2O_3$ sol have a close relationship to the dispersion factors such as the pH, the amount of acid additive(nitric acid, acetic acid), the milling time, and the size and combination of zirconia beads. Especially, $Al_2O_3$ sol added 4 wt% acetic acid was found to maintain the dispersion stability while its solid concentration increased to 15 wt%, this stability maintenance was the result of the electrostatic and steric repulsion of acetic acid molecules adsorbed on the surface of the $Al_2O_3$ particles. In order to observe the dispersion property of $Al_2O_3$ sol under NMP solvent, $Al_2O_3$ sol dispersed under ethanol solvent was modified and solvent-exchanged with N-Phenyl-(3-aminopropyl)trimethoxy silane(APTMS) through a binary solvent system. Characterization of the $Al_2O_3$ powder and the nanosol was observed by XRD, SEM, ICP, FT-IR, TGA, Particles size analysis, etc.
Keywords
aluminum ammonium sulfate; $Al_2O_3$ sol; bead mill; wet process; dispersion stability; silane surface modification;
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1 J. Yu, X. Huang, L. Wang, P. Peng, C. Wu, X. Wu and P. Jiang, Polym. Chem., 2, 1380 (2011).   DOI
2 J. H. Yu, S. H. Jung, G. P. Hong, J. S. Mun, J. S. Mun and J. B. Kang, J. Korean Ceram. Soc., 46, 217 (2009). (in Korean)
3 S. B. Lim, H. J. You, T. W. Hong and M. W. Jung, J. Korean Mater. Res., 20, 472 (2010). (in Korean)   DOI
4 H. L. Wen and F. S. Yen, J. Crystal Growth, 208, 696 (2000).   DOI
5 J. Li, Y. Pan, C. Xiang, Q. Ge and J. Guo, Ceram. Int., 32, 587 (2006).   DOI
6 Y. Q. Wu, Y. Zhang, X. X. Huang and J. K. Guo, Ceram. Int., 27, 265 (2001).   DOI
7 K. R. Lee and S. Y. Kim, Patent KR101587110B1 (2016).
8 M. Inkyo, T. Tahara, T. Iwaki, F. Iskandar, C. J. Hogan and K. Okuyama, J. Colloid Inter. Sci., 304, 535 (2006).   DOI
9 F. Stenger, S. Mende, J. Schwedes and W. Peukert, Chem. Eng. Sci., 60, 4557 (2005).   DOI
10 G. Wang and P. S. Nicholson, J. Am. Ceram. Soc., 84, 1250 (2001).
11 W. Peukert, H.-C. Schwarzer and F. Stenger, Chem. Eng. Process., 44, 245 (2005).   DOI
12 K. Kanie and T. Sugimoto, Chem. Commun., 14, 1584 (2004).
13 J. Yu, X. Huang, L. Wang, P. Peng, C. Wu, X. Wu and P. Jiang, Polymer Chem., 2, 1380 (2011).   DOI
14 Y. Shinozaki, M. Tokieda and K. Kawahara, U. S Patent Application, 815369 (2006).
15 S. H. Jeon, T. Thajudeen and C. J. Hogan, Power Technol., 272, 75 (2015).   DOI