A novel technique for preparing organophilic silica by water-in-oil microemulsions
Tóm tắt
A novel technique to prepare ultramicro spherical silica particles containing vinyl groups on their surfaces is presented. This process is a combination of the sol-gel technique and the water-in-oil microemulsion technique in which hydrolysis and condensation of TEOS [Si(OEt)4] and MPS (trimethoxysilylpropylmethacrylate) take place. Spherical silica particles with a size range from 20 to 70 nm were obtained and the surface concentrations of the double bonds per nm2 were from 4 to 7.
Tài liệu tham khảo
C. Guisard, M. Stitou, A. Larbot, L. Cot, and J. Rouviere, “Sol to Gel Transition in Reversed Micelles Microemulsions. A New Route to Produce Monolithic Metal-organic Derived Gels” in “Better Ceramic through Chemistry III; Symposium held April 5–8, Reno, Nevada, USA, 1988, Mat. Res. Symp. Proc. Vol. 121, 1988.
S. E. Frieberg, G. Rong, C. C. Yang, and Y. Yang, “Polymerization in Microemulsions” in Polymer Association Structures: Microemulsions and Liquid Crystals, ed. by A. Magda and El Nokaly, American Chemical Society, Washington D.C., 1989, 34–46.
S. E. Frieberg, and C. C. Yang, “Silica Glass from Water/Oil Microemulsions” in “Innovations in Materials Processing Using Aqueous, Colloid and Surface Chemistry” edited by F. M. Doyle, S. Raghavan, P. Somasundara and G. W. Warren, The Minerals, Metals and Materials Society, 1988, Proc. Top. Symp. 1988, 181–91.
A. B. Hardy, G. Gowda, T. J. McMahon R. E. Riman, W. E. Rhine, H. K. Bowen, “Preparation of Oxide Powders” in “Ultra Structure Processing of Advanced Ceramics”, ed. by J. D. Mackenzie and D. R. Ulrich, Wiley, NY 1988.
H. Yamauchi, T. Ishikawa, and S. Kondo, Colloids Surf., 37, 71–80 (1989).
F. Candau, Y. S. Leong, G. Pouyel, and S. Candau, J. Coll. Interfac. Sci. 101 (1), 167–183 (1984).
M. A. Llorente, A. L. Andrady, and J. E. Mark, J. Polym. Sci., 18, 2263–2270 (1980).
G. M. Brauer and E. Morowitz, in “Analytical Chemistry of Polymers, Vol XII, Part IV”, ed. by G. M. Kline, Interscience, New York, 1962, Chap. 1.
R. C. Smith, N. C. Angeletti and C. L. Hanson, in “Analysis of Silicones”, ed. by A. L. Smith, Interscience, New York, 1974, Chap. 7.
K. K. Unger, J. Chromatography, 16 (1979).
G. Wulf, D. Obekobush, and M. Minauk, Reactive Polym., 3, 261 (1985).
M. Nakajima, T. Shono, and K. Kimura, Chem. Lett., 747 (1985).
Y. Okamoto, and K. Hatada, J. of Liquid Chromatog, 9, 369, (1986).
E. Schomaker, A.-J. Zwarkeveen, and G. Challa, Polym. Commun., 29, 158–160 (1988).
B. B. Wheals, J. Chromatography, 107, 402–406 (1975).
R. K. Iler, “The Chemistry of Silica”, Wiley-Interscience, New York, 1979.
W. Stöber, and A. Fink, J. Coll. Interfac. Sci., 26, 62–69 (1968).
A. K. Van Helden, J. W. Jansen and A. Vrij, J. Coll. Interfac. Sci., 81(2), 351–368 (1981).
P. Plueddemann, “Silane Coupling Agents”, Plenum Press, New York, 1982.
M. A. Lutz, K. E. Polmanteer, and H. L. Chapman, “Novel Wet Process Silica Prepared from Alkyl Silicates”, Abstract, ACS Rubber Div. Meeting, Los Angeles, (1985).