Abstract
A new family of microporous semicrystalline silica materials (MSSMs) were developed at room temperature from acidic mixtures of alkyl-substituted silane and tetramethylalkoxysilane. Hydrolyzed alkyl-substituted silica precursors, having hydrophilic silanol groups and hydrophobic alkyl groups, presumably act not only as templates but also as sol stabilizers for continuous pore engineering of silica materials in the micropore region. Depending on the substituted alkyl (SUA) groups in initial sols, MSSMs have distinct broad x-ray diffraction peaks in low 2θ range of 2° to 12°, distinguishable thermal behavior of SUA groups, highly flexible processability, and discrete micropore size with good thermal stability of micropores after the removal of SUA groups. These designer microporous silicas are expected to be useful for molecular sieving applications.
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References
C.J. Brinker, R. Sehgal, S.L. Heitala, R. Deshpande, D.M. Smith, D. Loy, and C.S. Ashley, J. Memb. Sci. 94, 85 (1994).
K.J. Shea, D.A. Loy, and O. Webster, J. Am. Chem. Soc. 114, 6700 (1992).
G. Cao, Y. Lu, L. Delattre, C.J. Brinker, and G.P. Lopez, Adv. Mater. 8, 588 (1996).
P.B. Malla, S. Komarneni, H. Taguchi and H. Kido, J. Am. Ceram. Soc. 74, 2988 (1991).
C.T. Kresge, M.E. Leonowicz, W.T. Roth, J.C. Vartuli, and J.S. Beck, Nature 359, 710 (1992).
M. Ogawa, J. Am. Chem. Soc. 116, 7941 (1994).
M. Ogawa, Chem. Commun. 1149 (1996).
Y. Lu, R. Gangulli, C.A. Drewein, M.T. Anderson, C.J. Brinker, W.Gong, Y. Guo, H. Soyez, B. Dunn, M.H. Huang, and J.I. Zink, Nature 389, 364 (1997).
R.S.A de Lange, J.H.A. Hekkink, K. Keizer, and A.J. Burggraaf, Microporous Mater. 4, 169 (1995).
T. Bein, Chem. Mater. 8, 1636 (1996).
M. C. Lovallo and M. Tsapatsis, Chem. Mater. 8, 1579 (1996).
C.J. Brinker and G.W. Scherer, Sol-Gel Science: The Physics and Chemistry of Sol-Gel Processing (Academic Press, New York, 1990), p. 908.
L. Chu, M.I. Tejedor-Tejedor, and M.A. Anderson, Microporous Mater. 8, 207 (1997).
E. Kreamer, S. Foerster, C. Goeltner, and M. Antonietti, Langmuir 14, 2027 (1998).
A. Shimojima, Y. Sugahara, and K. Kuroda, J. Am. Chem. Soc. 120, 4528 (1998).
B.M. De Witte, D.Commers, and J.B. Uytterhoeven, J. Non-Cryst. Solids 202, 35 (1996).
M. Park, S. Komarneni, and J. Choi, J. Mater. Sci. 25, 75 (1998).
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Park, M., Komarneni, S., Lim, W.T. et al. Microporous Semicrystalline Silica Materials. Journal of Materials Research 15, 1437–1440 (2000). https://doi.org/10.1557/JMR.2000.0208
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DOI: https://doi.org/10.1557/JMR.2000.0208