Polysiloxane-Modified Mesoporous Materials
作者： K. Noble , A.B. Seddon , M.L. Turner , P. Chevalier , I.A. Mackinnon
关键词:
摘要: We report the preparation of polysiloxane-modified mesoporous silica gels derived from acid catalysed hydrolysis tetraethoxysilane (TEOS) and oligomeric silanol terminated polydimethylsiloxane (PDMS) in presence non-ionic surfactant, octaethylene glycol monohexadecyl ether. The were characterised using thermal gravimetric analysis (TGA), infra-red (IR) spectroscopy, X-ray diffraction (XRD) 29Si solid state cross-polarisation (CP) magic-angle spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy. TGA IR spectroscopy showed loss surfactant after calcination a decrease Si–OH band at 950 cm−1 indicated further condensation had occurred. This was confirmed by increase Q4 −110 ppm, MAS NMR which also that led to redistribution PDMS forming T species. XRD data ordering within structure, with an initial d-spacing 45 A, decreasing 35 A calcination.
springer.com
sci-hub.se 参考文章(13)
S. A. Bagshaw, E. Prouzet, T. J. Pinnavaia, Templating of Mesoporous Molecular Sieves by Nonionic Polyethylene Oxide Surfactants Science. ,vol. 269, pp. 1242- 1244 ,(1995) , 10.1126/SCIENCE.269.5228.1242
N.S.M Stevens, M.E Rezac, Nanoporous organic/inorganic hybrid materials produced from poly(dimethyl siloxane) Polymer. ,vol. 40, pp. 4289- 4298 ,(1999) , 10.1016/S0032-3861(98)00662-4
James H. Clark, Duncan J. Macquarrie, Dominic B. Jackson, James E. G. Mdoe, Organomodified hexagonal mesoporous silicates New Journal of Chemistry. ,vol. 23, pp. 539- 544 ,(1999) , 10.1039/A900839J
Myong H. Lim, Christopher F. Blanford, Andreas Stein, Synthesis and characterization of a reactive vinyl-functionalized MCM-41: Probing the internal pore structure by a bromination reaction Journal of the American Chemical Society. ,vol. 119, pp. 4090- 4091 ,(1997) , 10.1021/JA9638824
Hong Yang, Neil Coombs, Igor Sokolov, Geoffrey A. Ozin, Free-standing and oriented mesoporous silica films grown at the air–water interface Nature. ,vol. 381, pp. 589- 592 ,(1996) , 10.1038/381589A0
A. Firouzi, F. Atef, A. G. Oertli, G. D. Stucky, B. F. Chmelka, Alkaline Lyotropic Silicate−Surfactant Liquid Crystals Journal of the American Chemical Society. ,vol. 119, pp. 3596- 3610 ,(1997) , 10.1021/JA963007I
Thomas Maschmeyer, Fernando Rey, Gopinathan Sankar, John Meurig Thomas, Heterogeneous catalysts obtained by grafting metallocene complexes onto mesoporous silica Nature. ,vol. 378, pp. 159- 162 ,(1995) , 10.1038/378159A0
Hao Hsin Huang, Bruce Orler, Garth L. Wilkes, Structure-property behavior of new hybrid materials incorporating oligomeric species into sol-gel glasses. 3. Effect of acid content, tetraethoxysilane content, and molecular weight of poly(dimethylsiloxane) Macromolecules. ,vol. 20, pp. 1322- 1330 ,(1987) , 10.1021/MA00172A026
C. T. Kresge, M. E. Leonowicz, W. J. Roth, J. C. Vartuli, J. S. Beck, Ordered mesoporous molecular sieves synthesized by a liquid-crystal template mechanism Nature. ,vol. 359, pp. 710- 712 ,(1992) , 10.1038/359710A0
J. M. Breiner, J. E. Mark, G. Beaucage, Dependence of silica particle sizes on network chain lengths, silica contents, and catalyst concentrations inin situ-reinforced polysiloxane elastomers Journal of Polymer Science Part B. ,vol. 37, pp. 1421- 1427 ,(1999) , 10.1002/(SICI)1099-0488(19990701)37:13<1421::AID-POLB8>3.0.CO;2-M